US20040151861A1 - Thermoplastic adhesive dispensing method and apparatus - Google Patents
Thermoplastic adhesive dispensing method and apparatus Download PDFInfo
- Publication number
- US20040151861A1 US20040151861A1 US10/770,139 US77013904A US2004151861A1 US 20040151861 A1 US20040151861 A1 US 20040151861A1 US 77013904 A US77013904 A US 77013904A US 2004151861 A1 US2004151861 A1 US 2004151861A1
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- US
- United States
- Prior art keywords
- adhesive
- tape
- segments
- carrier tape
- dispensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
- B65H37/002—Web delivery apparatus, the web serving as support for articles, material or another web
- B65H37/005—Hand-held apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H37/00—Article or web delivery apparatus incorporating devices for performing specified auxiliary operations
- B65H37/002—Web delivery apparatus, the web serving as support for articles, material or another web
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
- C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
- B65H2701/194—Web supporting regularly spaced adhesive articles, e.g. labels, rubber articles, labels or stamps
- B65H2701/19402—Glue dots, arranged individually or in patterns
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/18—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet characterized by perforations in the adhesive tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/906—Roll or coil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
- Y10T156/1702—For plural parts or plural areas of single part
- Y10T156/1705—Lamina transferred to base from adhered flexible web or sheet type carrier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
- Y10T156/1702—For plural parts or plural areas of single part
- Y10T156/1705—Lamina transferred to base from adhered flexible web or sheet type carrier
- Y10T156/1707—Discrete spaced laminae on adhered carrier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
- Y10T156/1702—For plural parts or plural areas of single part
- Y10T156/1705—Lamina transferred to base from adhered flexible web or sheet type carrier
- Y10T156/1707—Discrete spaced laminae on adhered carrier
- Y10T156/171—Means serially presenting discrete base articles or separate portions of a single article
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
- Y10T156/1788—Work traversing type and/or means applying work to wall or static structure
- Y10T156/1795—Implement carried web supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/18—Surface bonding means and/or assembly means with handle or handgrip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1462—Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof [e.g., acrylamide, acrylate ester, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1476—Release layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1486—Ornamental, decorative, pattern, or indicia
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/149—Sectional layer removable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/149—Sectional layer removable
- Y10T428/1495—Adhesive is on removable layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/21—Circular sheet or circular blank
Definitions
- thermoplastic adhesive a pressure-sensitive, thermoplastic adhesive.
- the equipment for this process includes a heating container for the thermoplastic adhesive and a metering pump that may be electrically actuated.
- Thermoplastic adhesive can be difficult to work with. Its high melting temperature and adhesive properties present some risk of burn to untrained operators. The price of the equipment for dispensing the thermoplastic adhesive and positioning and placing the attachments makes such equipment impractical for low volume mailings.
- the present invention provides a method and apparatus allowing thermoplastic pressure-sensitive adhesives to be used simply and safely by those who have low-volume requirements.
- pressure-sensitive thermoplastic adhesive is pre-metered onto a release strip which may be rolled into coil.
- the size and spacing of the metered dots of thermoplastic adhesive allows one dot to be exposed at a time across an anvil plate which may be used to press the dot against a card or the like.
- the carrier strip may be advanced between the pressing operation to bring a new dot into position.
- the spacing of the dots along the strip provides simple methods of dispensing the dots including the use of a specially constructed cardboard dispenser box or the like or various automated metering systems and mechanisms to be described.
- thermoplastic adhesive dispensing tape having a flexible carrier tape extending longitudinally and having a transverse width and having opposed first and second release surfaces.
- Thermoplastic adhesive dots are arrayed longitudinally along the first release surface so that the carrier tape may be curved about an axis to expose a single adhesive dot to an abutting planar surface.
- the second release surface may adhere less strongly to the thermoplastic adhesive dot than does the first release surface.
- thermoplastic adhesive dispensing tape that may be unwound from a coil with the thermoplastic adhesive dots being retained on the first release surface.
- the invention includes a method of manufacturing the thermoplastic adhesive dispensing tape by unrolling the flexible carrier strip from a first reel to expose the first release surface and dispensing molten thermoplastic adhesive at periodic intervals on the unrolled carrier strip. The carrier strip is then rerolled to compress the dispensed molten thermoplastic adhesive into flat disks.
- the rerolling of the flexible carrier strip may be delayed until the thermoplastic adhesive has skinned over.
- thermoplastic adhesive dots are retained by the first release surface which receives the thermoplastic adhesive in a molten state prior to it skinning over and therefore adheres to it more strongly.
- the step of dispensing molten thermoplastic adhesive may simultaneously dispense at least two separate portions of thermoplastic adhesive at transversely separated locations.
- the method may include the further step of longitudinally slitting the flexible carrier strip between separate portions of the thermoplastic adhesive prior to rerolling the flexible carrier strip.
- the invention also includes a dispensing apparatus for the thermoplastic adhesive dispensing tape, including a reel support, for holding the thermoplastic adhesive dispensing tape in coiled configuration, and a guide for receiving the carrier tape after adhesive dots have been removed.
- An anvil surface is positioned between the reel and the guide to receive the thermoplastic adhesive dispensing tape as unreeled from the coil and deform the thermoplastic adhesive dispensing tape to expose a single adhesive dot to a planar surface.
- thermoplastic adhesive dots on the tape of the present invention it is another object of the invention to provide a rapid application technique for the thermoplastic adhesive dots on the tape of the present invention.
- the positioning of the dots so that a single dot may be exposed to a planar surface allows the dots to be readily applied to planar surfaces by a proper incrementing of the tape over a correctly sized anvil surface.
- FIG. 1 is a schematic view of a manufacturing system for the present invention showing the dispensing of thermoplastic pressure-sensitive dots onto a carrier strip and the winding of the strip into coils;
- FIG. 2 is a plan view of a section of a strip of the present invention showing the ultimate spacing of the dots when flattened;
- FIG. 3 is a cross section through a coil of FIG. 1 showing the compression of the dots by adjacent coils of the release strip;
- FIG. 4 is a perspective cut-away view of a container for dispensing the coils of FIG. 1 showing the spacing of the dots which permits a single dot to be exposed over an anvil surface for attachment to a card;
- FIG. 5 is a perspective view of the container of FIG. 4 placed in an automatic tape advancing apparatus to pull the release strip a predetermined amount at the pressing of a palm button;
- FIG. 6 is a simplified fragmentary cross section of a semi-automatic dispensing machine positioned for dispensing an adhesive dot on a carrier sheet prior to dispensing;
- FIG. 7 is a view similar to that of FIG. 6 showing a downward activation of the apparatus of FIG. 6 advancing a dot from the carrier strip over a movable anvil surface to be pressed against the carrier sheet;
- FIG. 8 is a figure similar to that of FIGS. 6 and 7 showing the upward return of the apparatus after dispensing, the return causing a tensioning of the used carrier strip in preparation of a second stroke.
- an adhesive dot manufacturing machine 10 provides a back tensioned reel 12 holding a differential release carrier strip 14 .
- the carrier strip 14 is a paper that has a silicon release material on opposed first and second surfaces 16 and 18 selectively applied so that surface 16 provides less release than surface 18 .
- the carrier strip 14 is dispensed from the tensioned reel 12 with surface 16 facing upward to move beneath a pair of thermoplastic glue metering nozzles 20 (only one of which is visible in FIG. 1) supplied by a metering pump not shown, to dispense side-by-side glue dots 22 onto surface 16 as surface 16 moves past nozzle 20 .
- Air jet 24 directed on surface 16 then cools the glue dots 22 which are also cooled by natural convection as the carrier strip 14 moves along.
- a slitting knife 26 divides the carrier strip 14 into multiple strips, each of which are then wound into coils 30 on take-up reels 28 under controlled tensioning. Capstan and idler wheels may also be provided so that the tension on reels 28 may be controlled independently of the tension provided by reel 12 .
- each glue dot 22 ′ is compressed beneath surface 18 of the carrier strip 14 of the next succeeding layer of carrier strip 14 and the surface 18 of the layer of the carrier strip 14 on which it was deposited so as to flatten the glue dots 22 ′ into circular disks.
- the spacing of the glue dots 22 ′ after flattening on the carrier strip 14 is such that the glue dots 22 ′ do not overlap in the dimension defined by the extent of carrier strip 14 . This ensures that there is a margin 32 in that dimension such that an individual glue dot 22 may be exposed for adhering to a card or the like without the risk of the card picking up multiple glue dots 22 . Dots 22 and 22 ′ of a preferred embodiment may be separated by three times their diameter.
- the coil 30 may be inserted within a dispensing container 34 having generally rectangular configuration with top, side, and bottom walls 36 and a spanning vertical wall 38 .
- Vertical wall 38 includes a coil support hub 40 extending laterally into the volume of the container 34 from the vertical wall 38 about which the coil 30 may be positioned. As positioned, the coil 30 is free to rotate along a horizontal axis with the outer surfaces of the coil containing the glue dots 22 ′ being removed from the inner surfaces of the walls 36 .
- a slot 43 at one end of the upper wall 36 allows a portion of the carrier strip 14 to be threaded from within the container 34 out of the slot 43 and across the upper wall 36 with the glue dots 22 ′ exposed on the upper surface of the carrier strip 14 .
- the upper wall 36 provides an anvil surface supporting the carrier strip 14 against pressure when a card 42 or the like is pressed down as indicated by arrow 44 against the upper surface of the carrier strip 14 to receive a glue dot 22 ′.
- the portion of the carrier strip 14 previously having its dots 22 ′ removed may be received within a slot 46 in a side wall 36 adjacent to the top wall 36 and then threaded out of a similar slot 48 positioned below slot 46 to permit sliding of the carrier strip 14 for the dispensing of additional dots 22 while preventing general looseness of the carrier strip 14 such as would promote unwinding of the coil 30 unintentionally.
- the container 34 may be used for manual dispensing or may be placed within an automatic dispensing system 50 .
- a system includes a rigid container sleeve 52 , holding the lower portion of the container 34 , and a motor drive unit 54 receiving the carrier strip 14 after dots have been removed and incrementing the tape by a predetermined amount with a pressing of a palm sized push button 56 .
- the motor drive unit 54 increments the carrier strip 14 by the interdot spacing so as to expose a single dot 22 ′ at the top of the container 34 .
- the coil 30 may be carried on a semi-automatic affixing tool 58 .
- a foot portion 60 of the tool 58 is placed at the top of a carrier sheet 63 where an adhesive dot will be placed.
- a plunger assembly 62 attached to slide up and down with respect to the foot portion 60 and biased upward with helical tension springs (not shown) so as to normally be held away from the carrier sheet 63 prior to the dispensing action.
- Plunger assembly 62 has a handle 64 exposed above the coil 30 and connected to a hanger 66 holding the coil for rotation about hanger 66 .
- a lower portion of the plunger assembly 62 includes a convex elastomeric anvil surface 68 flanked by rollers 70 .
- the rollers 70 guide the carrier strip 14 downward across the lower surface of the anvil 68 which contacts the inner surface 18 of the carrier strip and up between pinch rollers 72 which grasp the portion of the carrier strip 14 after dots have been removed.
- the handle 64 may be grasped and pressed downward toward the carrier sheet 63 as indicated by arrow 74 .
- the pinch rollers 72 are mounted to be fixed in height with respect to the foot portion 60 and to rotate only in a manner that would pull tape from the coil 30 .
- the anvil 68 moves towards the carrier sheet 63 simultaneously causing the unwinding of carrier strip 14 from the coil 30 such that at the moment the anvil 68 strikes the carrier sheet 63 , a glue dot 22 ′ is positioned immediately beneath the anvil 68 to be attached to the carrier sheet 63 .
- the handle 64 may be pulled upward aided by the springs (not shown) between the foot portions 60 and the plunger assembly 62 , at which time a ratchet lever (not shown) interconnecting the plunger assembly 62 and the foot portion 60 causes a partial rotation of the pinch rollers 72 in response to the movement of the plunger assembly 62 with respect to the foot portion 60 .
- This rotation of the pinch rollers 72 advances the carrier strip 14 to remove slack and cause it to remain abutted to the anvil 68 in preparation for a new actuation sequence.
- the tape of the present invention provides a simple method for dispensing dots of glue for joining materials together without the need for complex equipment or exposure to heated thermoplastic materials.
Abstract
Hot melt thermoplastic adhesive is predeposited on a carrier strip having front and back release surfaces. The carrier strip is rolled into a coil compressing the thermoplastic hot melt into disks which may later be removed for use. The disks are spaced so that the carrier strip may be deformed to expose a single disk to a planar surface permitting simplified dispensing of the disks.
Description
- This patent application is a continuation of U.S. patent application Ser. No. 10/125,012, filed on Apr. 18, 2002, entitled “Thermoplastic Adhesive Dispensing Method and Apparatus,” which is a continuation of U.S. patent application Ser. No. 09/998,950, filed on Nov. 15, 2001, entitled “Thermoplastic Adhesive Dispensing Method and Apparatus,” which is in turn a continuation of U.S. patent application Ser. No. 09/363,200, filed on Jul. 29, 1999, now U.S. Pat. No. 6,319,442, entitled “Process of Making a Thermoplastic Adhesive Dispensing Tape,” which is in turn a continuation-in-part of U.S. patent application Ser. No. 08/909,189, filed on Aug. 11, 1997, now U.S. Pat. No. 5,935,670, entitled “Thermoplastic Adhesive Dispensing Method and Apparatus,” which is in turn based upon U.S. Provisional Patent Application No. 60/036,896, filed on Feb. 6, 1997, all of which are assigned to the assignee of the present invention.
- In the preparation of mass mailings, for example, it is often desired to attach a card, such as a credit card or the like, to a carrier document so that the former can be peeled easily from the carrier document for use by a consumer. One method of making such an attachment uses a pressure-sensitive, thermoplastic adhesive. During the printing or collating process, a portion of the thermoplastic adhesive is metered onto the carrier document and the card pressed against this material. The equipment for this process includes a heating container for the thermoplastic adhesive and a metering pump that may be electrically actuated.
- Thermoplastic adhesive can be difficult to work with. Its high melting temperature and adhesive properties present some risk of burn to untrained operators. The price of the equipment for dispensing the thermoplastic adhesive and positioning and placing the attachments makes such equipment impractical for low volume mailings.
- The present invention provides a method and apparatus allowing thermoplastic pressure-sensitive adhesives to be used simply and safely by those who have low-volume requirements. In the present invention, pressure-sensitive thermoplastic adhesive is pre-metered onto a release strip which may be rolled into coil. The size and spacing of the metered dots of thermoplastic adhesive allows one dot to be exposed at a time across an anvil plate which may be used to press the dot against a card or the like. The carrier strip may be advanced between the pressing operation to bring a new dot into position.
- The spacing of the dots along the strip provides simple methods of dispensing the dots including the use of a specially constructed cardboard dispenser box or the like or various automated metering systems and mechanisms to be described.
- Specifically, the present invention provides a thermoplastic adhesive dispensing tape having a flexible carrier tape extending longitudinally and having a transverse width and having opposed first and second release surfaces. Thermoplastic adhesive dots are arrayed longitudinally along the first release surface so that the carrier tape may be curved about an axis to expose a single adhesive dot to an abutting planar surface.
- Thus, it is one object of the invention to provide a simple means for dispensing thermal plastic adhesive dots without requiring the expense or hazard of molten thermoplastic adhesive.
- The second release surface may adhere less strongly to the thermoplastic adhesive dot than does the first release surface.
- Thus, it is another object of the invention to provide a thermoplastic adhesive dispensing tape that may be unwound from a coil with the thermoplastic adhesive dots being retained on the first release surface.
- The invention includes a method of manufacturing the thermoplastic adhesive dispensing tape by unrolling the flexible carrier strip from a first reel to expose the first release surface and dispensing molten thermoplastic adhesive at periodic intervals on the unrolled carrier strip. The carrier strip is then rerolled to compress the dispensed molten thermoplastic adhesive into flat disks.
- Thus, it is another object of the invention to provide for adhesive disks that approximate the size and area that would be provided by an automatic dispensing equipment directly on the surfaces to be adhered together. The action of adjacent coils of the carrier strip mimics that of a card or other planar surface pressing against a molten portion of thermoplastic adhesives.
- The rerolling of the flexible carrier strip may be delayed until the thermoplastic adhesive has skinned over.
- Thus, it is yet another object of the invention to ensure that the thermoplastic adhesive dots are retained by the first release surface which receives the thermoplastic adhesive in a molten state prior to it skinning over and therefore adheres to it more strongly.
- The step of dispensing molten thermoplastic adhesive may simultaneously dispense at least two separate portions of thermoplastic adhesive at transversely separated locations. The method may include the further step of longitudinally slitting the flexible carrier strip between separate portions of the thermoplastic adhesive prior to rerolling the flexible carrier strip.
- Thus, it is another object of the invention to provide for a high throughput manufacture of adhesive dots with a single dispensing unit without jeopardizing the cooling of the dots as is necessary to allow them to skin over.
- The invention also includes a dispensing apparatus for the thermoplastic adhesive dispensing tape, including a reel support, for holding the thermoplastic adhesive dispensing tape in coiled configuration, and a guide for receiving the carrier tape after adhesive dots have been removed. An anvil surface is positioned between the reel and the guide to receive the thermoplastic adhesive dispensing tape as unreeled from the coil and deform the thermoplastic adhesive dispensing tape to expose a single adhesive dot to a planar surface.
- Thus, it is another object of the invention to provide a rapid application technique for the thermoplastic adhesive dots on the tape of the present invention. The positioning of the dots so that a single dot may be exposed to a planar surface allows the dots to be readily applied to planar surfaces by a proper incrementing of the tape over a correctly sized anvil surface.
- The foregoing and other objects and advantages of the invention will appear from the following description. In this description, reference is made to the accompanying drawings which form a part hereof and in which there is shown by way of illustration, a preferred embodiment of the invention. Such embodiment does not necessarily represent the full scope of the invention, however, and reference must be made therefore to the claims for interpreting the scope of the invention.
- FIG. 1 is a schematic view of a manufacturing system for the present invention showing the dispensing of thermoplastic pressure-sensitive dots onto a carrier strip and the winding of the strip into coils;
- FIG. 2 is a plan view of a section of a strip of the present invention showing the ultimate spacing of the dots when flattened;
- FIG. 3 is a cross section through a coil of FIG. 1 showing the compression of the dots by adjacent coils of the release strip;
- FIG. 4 is a perspective cut-away view of a container for dispensing the coils of FIG. 1 showing the spacing of the dots which permits a single dot to be exposed over an anvil surface for attachment to a card;
- FIG. 5 is a perspective view of the container of FIG. 4 placed in an automatic tape advancing apparatus to pull the release strip a predetermined amount at the pressing of a palm button;
- FIG. 6 is a simplified fragmentary cross section of a semi-automatic dispensing machine positioned for dispensing an adhesive dot on a carrier sheet prior to dispensing;
- FIG. 7 is a view similar to that of FIG. 6 showing a downward activation of the apparatus of FIG. 6 advancing a dot from the carrier strip over a movable anvil surface to be pressed against the carrier sheet; and
- FIG. 8 is a figure similar to that of FIGS. 6 and 7 showing the upward return of the apparatus after dispensing, the return causing a tensioning of the used carrier strip in preparation of a second stroke.
- Referring to FIG. 1, an adhesive
dot manufacturing machine 10 provides a back tensionedreel 12 holding a differentialrelease carrier strip 14. Thecarrier strip 14 is a paper that has a silicon release material on opposed first andsecond surfaces surface 16 provides less release thansurface 18. - The
carrier strip 14 is dispensed from thetensioned reel 12 withsurface 16 facing upward to move beneath a pair of thermoplastic glue metering nozzles 20 (only one of which is visible in FIG. 1) supplied by a metering pump not shown, to dispense side-by-side glue dots 22 ontosurface 16 assurface 16 moves pastnozzle 20.Air jet 24 directed onsurface 16 then cools theglue dots 22 which are also cooled by natural convection as thecarrier strip 14 moves along. - A
slitting knife 26 divides thecarrier strip 14 into multiple strips, each of which are then wound intocoils 30 on take-up reels 28 under controlled tensioning. Capstan and idler wheels may also be provided so that the tension onreels 28 may be controlled independently of the tension provided byreel 12. - Referring now to FIG. 3, the
glue dots 22 are initially mounded high on thesurface 16 of thecarrier strip 14, but as they are wound about thereel 28, eachglue dot 22′ is compressed beneathsurface 18 of thecarrier strip 14 of the next succeeding layer ofcarrier strip 14 and thesurface 18 of the layer of thecarrier strip 14 on which it was deposited so as to flatten theglue dots 22′ into circular disks. - The differential release properties of
surfaces glue dots 22 were initially applied in a hot state tosurface 16 causing better adherence, and the fact that there is some cooling and hence “skinning over” of the glue dots 22 prior to the winding onreel 28, all ensure that theglue dots 22 remain adhered tosurfaces 16 as thecoil 30 is unwound. - Referring now to FIG. 2, the spacing of the
glue dots 22′ after flattening on thecarrier strip 14 is such that theglue dots 22′ do not overlap in the dimension defined by the extent ofcarrier strip 14. This ensures that there is amargin 32 in that dimension such that anindividual glue dot 22 may be exposed for adhering to a card or the like without the risk of the card picking upmultiple glue dots 22.Dots - Referring now to FIG. 4, the
coil 30 may be inserted within a dispensingcontainer 34 having generally rectangular configuration with top, side, andbottom walls 36 and a spanningvertical wall 38.Vertical wall 38 includes acoil support hub 40 extending laterally into the volume of thecontainer 34 from thevertical wall 38 about which thecoil 30 may be positioned. As positioned, thecoil 30 is free to rotate along a horizontal axis with the outer surfaces of the coil containing theglue dots 22′ being removed from the inner surfaces of thewalls 36. - A
slot 43 at one end of theupper wall 36 allows a portion of thecarrier strip 14 to be threaded from within thecontainer 34 out of theslot 43 and across theupper wall 36 with theglue dots 22′ exposed on the upper surface of thecarrier strip 14. Theupper wall 36 provides an anvil surface supporting thecarrier strip 14 against pressure when acard 42 or the like is pressed down as indicated byarrow 44 against the upper surface of thecarrier strip 14 to receive aglue dot 22′. - As a result of the earlier removal of the
glue dots 22′ on thecarrier strip 14, only asingle dot 22′ will be exposed on the upper surface of thecontainer 34 at a time simplifying this attachment process. - The portion of the
carrier strip 14 previously having itsdots 22′ removed may be received within aslot 46 in aside wall 36 adjacent to thetop wall 36 and then threaded out of asimilar slot 48 positioned belowslot 46 to permit sliding of thecarrier strip 14 for the dispensing ofadditional dots 22 while preventing general looseness of thecarrier strip 14 such as would promote unwinding of thecoil 30 unintentionally. - Referring to FIG. 5, the
container 34 may be used for manual dispensing or may be placed within anautomatic dispensing system 50. Such a system includes arigid container sleeve 52, holding the lower portion of thecontainer 34, and amotor drive unit 54 receiving thecarrier strip 14 after dots have been removed and incrementing the tape by a predetermined amount with a pressing of a palmsized push button 56. With each pressing of thebutton 56, themotor drive unit 54 increments thecarrier strip 14 by the interdot spacing so as to expose asingle dot 22′ at the top of thecontainer 34. - Referring now to FIG. 6 in an alternative dispensing method, the
coil 30 may be carried on asemi-automatic affixing tool 58. Afoot portion 60 of thetool 58 is placed at the top of acarrier sheet 63 where an adhesive dot will be placed. Aplunger assembly 62 attached to slide up and down with respect to thefoot portion 60 and biased upward with helical tension springs (not shown) so as to normally be held away from thecarrier sheet 63 prior to the dispensing action.Plunger assembly 62 has ahandle 64 exposed above thecoil 30 and connected to ahanger 66 holding the coil for rotation abouthanger 66. A lower portion of theplunger assembly 62 includes a convexelastomeric anvil surface 68 flanked byrollers 70. Therollers 70 guide thecarrier strip 14 downward across the lower surface of theanvil 68 which contacts theinner surface 18 of the carrier strip and up betweenpinch rollers 72 which grasp the portion of thecarrier strip 14 after dots have been removed. - Referring now to FIG. 7, the
handle 64 may be grasped and pressed downward toward thecarrier sheet 63 as indicated by arrow 74. Thepinch rollers 72 are mounted to be fixed in height with respect to thefoot portion 60 and to rotate only in a manner that would pull tape from thecoil 30. Hence, with downward motion of theplunger assembly 62, theanvil 68 moves towards thecarrier sheet 63 simultaneously causing the unwinding ofcarrier strip 14 from thecoil 30 such that at the moment theanvil 68 strikes thecarrier sheet 63, aglue dot 22′ is positioned immediately beneath theanvil 68 to be attached to thecarrier sheet 63. - Referring now to FIG. 8, the
handle 64 may be pulled upward aided by the springs (not shown) between thefoot portions 60 and theplunger assembly 62, at which time a ratchet lever (not shown) interconnecting theplunger assembly 62 and thefoot portion 60 causes a partial rotation of thepinch rollers 72 in response to the movement of theplunger assembly 62 with respect to thefoot portion 60. This rotation of thepinch rollers 72 advances thecarrier strip 14 to remove slack and cause it to remain abutted to theanvil 68 in preparation for a new actuation sequence. - Thus the tape of the present invention provides a simple method for dispensing dots of glue for joining materials together without the need for complex equipment or exposure to heated thermoplastic materials.
- The above description has been that of a preferred embodiment of the present invention. It will occur to those that practice the art that many modifications may be made without departing from the spirit and scope of the invention. For example, a separate release strip may be wound into the coils of the dots to avoid the need for a carrier strip having opposed release surfaces. Glue dots having shapes other than disks may be produced by the appropriate dispensing nozzles. In order to apprise the public of the various embodiments that may fall within the scope of the invention, the following claims are made.
Claims (22)
1. An adhesive dispensing tape comprising:
a flexible carrier tape having a transverse width defined by first and second edges and a longitudinal length; and
a row of adhesive segments spaced apart along said longitudinal length of said carrier tape, each of said adhesive segments in said row of adhesive segments being disposed between said first and said second edges of said transverse width of said carrier tape;
whereby a portion of said carrier tape may be transversely flexed to expose a single adhesive segment to an abutting planar surface.
2. An adhesive dispensing tape as defined in claim 1 , wherein said adhesive segments comprise hot melt adhesive segments, pressure-sensitive adhesive segments, or combinations thereof.
3. An adhesive dispensing tape as defined in claim 1 , wherein said carrier tape has first and second release surfaces, and wherein said adhesive segments adhere less strongly to said second release surface than they do to said first release surface, whereby said carrier tape may be unwound from a coil with said adhesive segments being retained on said first release surface.
4. An adhesive dispensing tape as defined in claim 1 , wherein each of said adhesive segments are disposed at a point that is centered along said transverse width of said carrier tape, wherein said adhesive segments form a substantially straight line in a longitudinal direction along said carrier tape.
5. An adhesive dispensing tape as defined in claim 1 , wherein said adhesive segments are disk-shaped.
6. An adhesive dispensing tape as defined in claim 1 , wherein said adhesive segments are disposed in a single row in a longitudinal direction along said carrier tape.
7. An adhesive dispensing tape comprising:
a flexible carrier tape having a width dimension extending in a transverse direction and a length dimension extending in a longitudinal direction; and
a series of adhesive segments non-contiguously staggered along said length of said carrier tape in the longitudinal direction, wherein a portion of said carrier tape may be transversely flexed to expose a single adhesive segment to an abutting planar surface.
8. An adhesive dispensing tape as defined in claim 7 , wherein said adhesive segments comprise hot melt adhesive segments, pressure-sensitive adhesive segments, or combinations thereof.
9. An adhesive dispensing tape as defined in claim 7 , wherein said series of said adhesive segments are substantially linearly disposed on said carrier tape along the length of said carrier tape.
10. An adhesive dispensing tape as defined in claim 7 , wherein said width of said carrier tape is defined by first and second edges and wherein said series of adhesive segments is located along said length of said carrier tape between said first and second edges of said width of said carrier tape.
11. An adhesive dispensing tape as defined in claim 7 , wherein said carrier tape has first and second release surfaces, and wherein said adhesive segments adhere less strongly to said second release surface than they do to said first release surface, whereby said carrier tape may be unwound from a coil with said adhesive segments being retained on said first release surface.
12. An adhesive dispensing tape as defined in claim 11 , wherein said adhesive disks have a diameter measured along said first release surface and are separated in the longitudinal direction by a margin at least equal to the diameter.
13. An adhesive dispensing tape as defined in claim 11 , wherein said adhesive disks have a diameter measured along said first release surface and are separated in the longitudinal direction by a margin at least three times the diameter of the circular disks.
14. An adhesive dispensing tape as defined in claim 7 , wherein said adhesive segments are each disks having a generally circular configuration.
15. An adhesive dispensing tape as defined in claim 7 , wherein said adhesive segments are disposed in a single row in said longitudinal direction along said carrier tape.
16. An adhesive dispensing tape comprising:
a flexible carrier tape having a transverse width defined by first and second edges and a longitudinal length comprising a plurality of adjoining longitudinal segments extending along the entire longitudinal length of said carrier tape, each of said longitudinal segments extending the entire transverse width of said flexible carrier tape; and
a plurality of spaced-apart adhesive segments distributed on said carrier tape along the longitudinal length of said carrier tape, wherein at least one adhesive segment is disposed within each of said longitudinal segments on said carrier tape.
17. An adhesive dispensing tape as defined in claim 16 , wherein said adhesive segments comprise hot melt adhesive segments, pressure-sensitive adhesive segments, or combinations thereof.
18. An adhesive dispensing tape as defined in claim 16 , wherein said adhesive segments are disposed on said carrier tape along the longitudinal length of said carrier tape in a substantially straight line.
19. An adhesive dispensing tape as defined in claim 16 , wherein each of said adhesive segments is disposed within one of said longitudinal segments at a point between said first and second edges of said transverse width of said carrier tape.
20. An adhesive dispensing tape as defined in claim 16 , wherein said carrier tape has first and second release surfaces, and wherein said adhesive segments adhere less strongly to said second release surface than they do to said first release surface, whereby said carrier tape may be unwound from a coil with said adhesive segments being retained on said first release surface.
21. An adhesive dispensing tape as defined in claim 16 , wherein only a single one of said adhesive segments is disposed within each of said longitudinal segments on said carrier tape.
22. An adhesive dispensing tape as defined in claim 16 , wherein said adhesive segments are disposed in a single row in said longitudinal direction along said carrier tape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/770,139 US20040151861A1 (en) | 1997-02-06 | 2004-02-02 | Thermoplastic adhesive dispensing method and apparatus |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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US3689697P | 1997-02-06 | 1997-02-06 | |
US08/909,189 US5935670A (en) | 1997-02-06 | 1997-08-11 | Thermoplastic adhesive dispensing method and apparatus |
US09/363,200 US6319442B1 (en) | 1997-02-06 | 1999-07-29 | Process of making a thermoplastic adhesive dispensing tape |
US09/998,950 US6640864B2 (en) | 1997-02-06 | 2001-11-15 | Dispensing apparatus for a thermoplastic adhesive tape |
US10/125,012 US6686016B2 (en) | 1997-02-06 | 2002-04-18 | Thermoplastic adhesive dispensing method and apparatus |
US10/770,139 US20040151861A1 (en) | 1997-02-06 | 2004-02-02 | Thermoplastic adhesive dispensing method and apparatus |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/125,012 Continuation US6686016B2 (en) | 1997-02-06 | 2002-04-18 | Thermoplastic adhesive dispensing method and apparatus |
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US20040151861A1 true US20040151861A1 (en) | 2004-08-05 |
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US09/363,200 Expired - Lifetime US6319442B1 (en) | 1997-02-06 | 1999-07-29 | Process of making a thermoplastic adhesive dispensing tape |
US09/998,950 Expired - Lifetime US6640864B2 (en) | 1997-02-06 | 2001-11-15 | Dispensing apparatus for a thermoplastic adhesive tape |
US10/125,012 Expired - Lifetime US6686016B2 (en) | 1997-02-06 | 2002-04-18 | Thermoplastic adhesive dispensing method and apparatus |
US10/770,139 Abandoned US20040151861A1 (en) | 1997-02-06 | 2004-02-02 | Thermoplastic adhesive dispensing method and apparatus |
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US09/363,200 Expired - Lifetime US6319442B1 (en) | 1997-02-06 | 1999-07-29 | Process of making a thermoplastic adhesive dispensing tape |
US09/998,950 Expired - Lifetime US6640864B2 (en) | 1997-02-06 | 2001-11-15 | Dispensing apparatus for a thermoplastic adhesive tape |
US10/125,012 Expired - Lifetime US6686016B2 (en) | 1997-02-06 | 2002-04-18 | Thermoplastic adhesive dispensing method and apparatus |
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Cited By (10)
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US20050118378A1 (en) * | 1997-02-06 | 2005-06-02 | Glue Dots International, Llc | Thermoplastic adhesive dispensing method and apparatus |
US20050266198A1 (en) * | 1997-02-06 | 2005-12-01 | Downs John P | Adhesive segment indexing method and apparatus and roll of adhesive segments for use therewith |
US7837815B2 (en) | 1997-02-06 | 2010-11-23 | Glue Dots International Llc | Adhesive segment indexing method and apparatus and roll of adhesive segments for use therewith |
US20110059282A1 (en) * | 1997-02-06 | 2011-03-10 | Downs John P | Adhesive Segment Indexing Method and Apparatus and Roll of Adhesive Segments for Use Therewith |
US20050178507A1 (en) * | 2003-12-09 | 2005-08-18 | Hajny Roger V. | System and method for advancing thermoplastic adhesive segment dispensing tape and applying adhesive segments thereby |
US20080017323A1 (en) * | 2003-12-09 | 2008-01-24 | Peterson Burton J | Handheld adhesive applicator |
US8006734B2 (en) | 2003-12-09 | 2011-08-30 | Glue Dots International Llc | System and method for advancing thermoplastic adhesive segment dispensing tape and applying adhesive segments thereby |
US20050084641A1 (en) * | 2004-05-14 | 2005-04-21 | Glue Dots International, Llc | Perforated adhesive dispensing sheets |
US20050255275A1 (en) * | 2004-05-14 | 2005-11-17 | Downs John P | Adhesive dispensing tape including a transparent carrier material |
US8235760B2 (en) | 2010-07-29 | 2012-08-07 | Confluence Holdings Corp. | Paddle with selectable blade angle |
Also Published As
Publication number | Publication date |
---|---|
US20020122911A1 (en) | 2002-09-05 |
US6640864B2 (en) | 2003-11-04 |
US6686016B2 (en) | 2004-02-03 |
US5935670A (en) | 1999-08-10 |
US20020033238A1 (en) | 2002-03-21 |
US6319442B1 (en) | 2001-11-20 |
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Legal Events
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |