WO2001026987A1 - Tearable guarantee closure - Google Patents

Tearable guarantee closure Download PDF

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Publication number
WO2001026987A1
WO2001026987A1 PCT/CH2000/000539 CH0000539W WO0126987A1 WO 2001026987 A1 WO2001026987 A1 WO 2001026987A1 CH 0000539 W CH0000539 W CH 0000539W WO 0126987 A1 WO0126987 A1 WO 0126987A1
Authority
WO
WIPO (PCT)
Prior art keywords
closure
welding
closure according
bag
welding spots
Prior art date
Application number
PCT/CH2000/000539
Other languages
German (de)
French (fr)
Inventor
Ulrich Mathis
Original Assignee
Zip Pack Ip Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zip Pack Ip Ag filed Critical Zip Pack Ip Ag
Priority to AU74009/00A priority Critical patent/AU7400900A/en
Publication of WO2001026987A1 publication Critical patent/WO2001026987A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/34—End- or aperture-closing arrangements or devices with special means for indicating unauthorised opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/76—Making non-permanent or releasable joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81417—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure

Definitions

  • the invention relates to a tear-open guarantee closure in accordance with the preamble of patent claim 1.
  • a shipping bag is described in US Pat. No. 5,224,779, the removal opening of which has a reclosable closure and at the same time a non-reclosable closure.
  • the non-reclosable closure is used to prevent access to its contents, so that visible traces of access are left on the first or unauthorized opening.
  • the non-reclosable closure consists either of a glued-in paper strip, which can be split apart by pulling it apart, or of a peelable strip, which is attached outside of the reclosable closure. Smaller sacks, which are mainly opened in households by private individuals, can lead to problems with the closures produced in the manner described above, because the corresponding knowledge and the ability to open them are lacking.
  • the object of the present invention is to provide a tear-open closure for the removal opening of paper and plastic sacks, which can be opened simply and without special knowledge and instructions on the one hand and on the other hand before or after filling the sack with simple means this can be attached.
  • a tear-open closure according to the features of claim 1.
  • the fiction, asse closure can be opened with little effort by simply pulling apart the adjacent sack walls at the removal opening. After opening, no parts of the sack contents can stick to the closure when emptying.
  • the perforations that may arise on one side of the sack wall are so small that when the contents are poured out, the latter cannot fall through the perforations.
  • the content can therefore be removed from the sack without hindrance through the opened closure.
  • the second closure which is offset inward from the first, is used, namely the reclosable closure in the form of a zipper or a profile or adhesive tape closure.
  • the tear-open guarantee closure according to the invention can be attached in a simple manner before or after the bag is filled to its full opening by means of ultrasonic or thermal welding.
  • the spot welds are attached to a plastic band containing the reclosable closure.
  • extruded plastic tapes can of course also be attached to plastic bags.
  • the welding points are applied continuously or discontinuously, depending on which method is the more suitable and preferably already after the extrusion of the strips.
  • the invention is explained in more detail with the aid of an illustrated exemplary embodiment. Show it:
  • FIG. 1 shows a perspective view of a paper or plastic sack with two fastener tapes carrying the tear-open fastener
  • FIG 2 shows the fastener tape from Figure 1 after
  • FIG. 3 shows a simplified illustration of an intermittently working welding device for attaching the welding points
  • Figure 4 is a simplified representation of a continuously working welding device for attaching the welding points.
  • the sack 1 shown in FIG. 1 has two narrow side walls 3 and a front wall 5 and a rear wall 7, which are tightly connected to one another at the bottom by a bottom 9.
  • the structure of the bag 1 is not part of this invention and is therefore not explained in detail. It can also have a completely different structure. Sacks of this design or other shapes of paper or plastic suitable for the invention are known.
  • closure straps 13 and 15 are attached to the front and rear walls 5 and 7.
  • the sealing tapes 13 and 15, which are preferably produced by extrusion, are usually glued or hot-sealed to the front and rear walls 5 and 7. The type of gluing depends on the material of both the bag 1 and the closure tape 13, 15.
  • a pair of fastener tapes 13, 15 with a groove-shaped profile or snap fastener 11 formed in a known manner, consisting of a groove part and a hook-shaped part, which can be snapped into the groove and serves as a reclosable fastener, is shown and described.
  • the two bands 13 and 15 are permanently connected to an upper edge of the walls 5 and 7.
  • a plurality of fine spot welds 17 are provided in a straight line (shown on the left half of the closure) or in a zigzag line (shown on the right half of the closure).
  • the distances between the welding points 17 are preferably the same; they can also have a larger mutual distance in certain areas, for example, at one point To facilitate tearing open. For example, the distance between the last two welding points can be increased by inserting a finger to tear apart the adjacent welding points.
  • the welding points 17 can be made using sonotrodes of an ultrasonic welding device 25 or by means of a
  • the welding spots 17 are generated continuously immediately after the extrusion and assembly of the strips 13, 15 by a spike wheel 21, the spikes 23 of which come into contact with the sonotrode 25 of the US welding device 19 (FIG. 4).
  • a comb 27 with teeth 29 can be brought into contact with the sonotrode 25 and the bands 13, 15 between them can be welded (FIG. 3).
  • the latter embodiment can be stationary and can be used for welding bags 1 that have already been assembled. If the comb 27 and the sonotrode 25 are movably mounted on a carriage 31, welding spots 17 can be attached to a continuously running pair of fastener tapes by tracking the comb 27 and the sonotrode 25.
  • the welding points 17 have different diameters depending on the size of the bag 1 and the associated thickness of the material of the strips 13, 15.
  • the diameters can range from half a millimeter to several millimeters. The amount of the diameter together with the quality of the strip material, the strength ultimately results, which is claimed.
  • the opening of the non-resealable closure is extremely easy.
  • the two edges of the fastening straps 13, 15 are grasped and pulled apart. When pulling apart, the welding points 17 or the welding points 17 remain on one of the two edges 13 or 15 and small perforations are formed on the other edge 15 or 13.
  • a finger can also be inserted between two welding points 17 and then guided in the direction of the welding point line, so that the welding points 17 can be released one after the other.
  • connection is definitely and visibly released when pulled apart. This type of connection therefore also serves as protection against fabrication and makes it impossible for third parties to gain access to the inside of the bag without leaving any traces.

Abstract

The tearable closure comprises a row of welded points (17) made between both closure strips (13, 15). When the closure strips (13, 15) are opened for the first time the welded points (17) are broken. The contents of the bag (1) are then accessible. A second closure (23) is used for subsequent resealing of the bag (1).

Description

Aufreissbarer Gararitie-VerschlussTearable guarantee closure
Gegenstand der Erfindung ist ein aufreissbarer Garantie- Verschluss gemaεs Oberbegriff des Patentanspruches 1.The invention relates to a tear-open guarantee closure in accordance with the preamble of patent claim 1.
Aufreissbare Verschlüsse an der Entnahmeoffnung von Papier- und Kunststoffsacken sind bekannt.Tear open closures at the removal opening of paper and plastic bags are known.
In der US-A 5,224,779 wird ein Versandsack beschrieben, dessen Entnahmeoffnung einen wiederverschliessbaren Verschluss und zugleich einen nicht wiederverschliessbaren Verschluss aufweist. Der nicht wiederverschliessbare Verschluss dient dazu, den Zugriff zu dessen Inhalt zu verhindern, so dass sichtbare Zugriffspuren beim ersten oder unberechtigten Offnen hinterlassen werden. Der nicht wiederverschliessbare Verschluss besteht entweder aus einem eingeklebten Papierstreifen, welcher durch Auseinanderziehen gespalten werden kann oder aus einem schalbaren (peelable) Streifen, welcher ausserhalb des wiederverschliessbaren Verschlusses angebracht ist. Bei kleineren Säcken, welche vorwiegend in Haushalten durch Privatpersonen geöffnet werden, können in der oben beschribenen Weise hergestellte Verschlüsse zu Problemen fuhren, weil die entsprechenden Kenntnisse und die Fertigkeit, diese zu offnen, fehlen.A shipping bag is described in US Pat. No. 5,224,779, the removal opening of which has a reclosable closure and at the same time a non-reclosable closure. The non-reclosable closure is used to prevent access to its contents, so that visible traces of access are left on the first or unauthorized opening. The non-reclosable closure consists either of a glued-in paper strip, which can be split apart by pulling it apart, or of a peelable strip, which is attached outside of the reclosable closure. Smaller sacks, which are mainly opened in households by private individuals, can lead to problems with the closures produced in the manner described above, because the corresponding knowledge and the ability to open them are lacking.
In der US-A 5,224,779 ist weiter ein nicht wiederverschliesbarer Verschluss beschrieben, welcher aus einer parallel zum wiederverschliessbaren Verschluss liegenden Klebestellen besteht. Dabei sind die Klebestellen entweder schalbar oder sie sind nicht schalbar und deshalb von Perforationen umgeben, welche beim Auseinanderziehen der Sackoffnung brechen. Die entlang der Sackoffnungskante liegenden Klebestellen bilden wohl einen sicheren Garantieverschluss, das erste offnen des Sackes durch ungeübte und insbesondere altere Personen kann zu Schwierigkeiten fuhren.In US-A 5,224,779 a non-reclosable closure is further described, which consists of an adhesive point lying parallel to the reclosable closure. The glue points can either be peeled or they cannot be peeled and are therefore surrounded by perforations, which break when the bag opening is pulled apart. The glue points along the edge of the bag probably form a secure guarantee closure, the first opening of the bag by inexperienced and especially older people can lead to difficulties.
Die Aufgabe der vorliegenden Erfindung besteht nun darin, einen aufreissbaren Verschluss für die Entnahmeoffnung von Papier- und Kunststoffsacken zu schaffen, der zum einen einfach und ohne besondere Kenntnisse und Anleitungen geöffnet werden kann und zum anderen vor oder nach dem Abfüllen des Sackes mit einfachen Mitteln an diesem angebracht werden kann.The object of the present invention is to provide a tear-open closure for the removal opening of paper and plastic sacks, which can be opened simply and without special knowledge and instructions on the one hand and on the other hand before or after filling the sack with simple means this can be attached.
Gelost wird diese Aufgabe durch einen aufreissbaren Verschluss gemass den Merkmalen des Patentanspruches 1. Der erfindungsge asse Verschluss lasst sich durch einfaches Auseinanderziehen der aneinanderliegenden Sackwände an der Entnahmeoffnung mit geringem Kraftaufwand offnen. Nach dem Offnen können beim Entleeren am Verschluss keine Teile des Sackinhaltes kleben bleiben. Die allenfalls an einer Seite der Sackwand entstehenden Perforationen sind so klein, dass beim Ausschütten des Inhalt letzterer nicht durch die Perforationen fallen kann. Der Inhalt kann also ohne Behinderung durch den geöffneten Verschluss dem Sack entnommen werden. Für das Wiederverschliessen des Sackes dient der zweite, nach innen versetzt zum ersten ausgebildete Verschluss, nämlich der wiederverschliessbare Verschluss in Gestalt eines Reissverschlusses oder eines Profil- oder Haftbandverschlusses . Der aufreissbare erfindungsgemasse Garantie-Verschluss kann in einfacher Weise vor oder nach dem Abfüllen des Sackes auf dessen Fulloffnung durch Ultraschall- oder Thermoschweissungen angebracht werden. Bei Papiersacken sind die punktformigen Schweissungen an einem den wiederverschliessbaren Verschluss enthaltenden Kunststoffband angebracht. Solche extrudierten Kunststoffbander können selbstverständlich auch an Kunststoffsacken befestigt werden.This object is achieved by a tear-open closure according to the features of claim 1. The fiction, asse closure can be opened with little effort by simply pulling apart the adjacent sack walls at the removal opening. After opening, no parts of the sack contents can stick to the closure when emptying. The perforations that may arise on one side of the sack wall are so small that when the contents are poured out, the latter cannot fall through the perforations. The content can therefore be removed from the sack without hindrance through the opened closure. For the reclosure of the sack, the second closure, which is offset inward from the first, is used, namely the reclosable closure in the form of a zipper or a profile or adhesive tape closure. The tear-open guarantee closure according to the invention can be attached in a simple manner before or after the bag is filled to its full opening by means of ultrasonic or thermal welding. In the case of paper bags, the spot welds are attached to a plastic band containing the reclosable closure. Such extruded plastic tapes can of course also be attached to plastic bags.
Das Anbringen der Schweisspunkte erfolgt kontinuierlich oder diskontinuierlich, je nach dem, welches Verfahren das geeignetere ist und vorzugsweise schon nach der Extrusion der Bander. Anhand eines illustrierten Ausfuhrungsbeispiels wird die Erfindung näher erläutert. Es zeigen:The welding points are applied continuously or discontinuously, depending on which method is the more suitable and preferably already after the extrusion of the strips. The invention is explained in more detail with the aid of an illustrated exemplary embodiment. Show it:
Figur 1 in perspektivischer Darstellung einen Papieroder Kunststoffsack mit zwei den aufreissbaren Verschluss tragenden Verschlussbändern,FIG. 1 shows a perspective view of a paper or plastic sack with two fastener tapes carrying the tear-open fastener,
Figur 2 die Verschlussbander aus Figur 1 nach demFigure 2 shows the fastener tape from Figure 1 after
Aufreissen des nicht wiederverschliessbaren Verschlusses ,Opening the non-reclosable closure,
Figur 3 eine vereinfachte Darstellung einer intermittierend arbeitenden Schweissvorrichtung zum Anbringen der Schweisspunkte,FIG. 3 shows a simplified illustration of an intermittently working welding device for attaching the welding points,
Figur 4 eine vereinfachte Darstellung einer kontinuierlich arbeitenden Schweissvorrichtung zum Anbringen der Schweisspunkte.Figure 4 is a simplified representation of a continuously working welding device for attaching the welding points.
Der in Figur 1 dargestellte Sack 1 weist zwei schmale Seitenwande 3 sowie eine Vorderwand 5 und eine Ruckwand 7 auf, welche unten durch einen Boden 9 dicht miteinander verbunden sind. Der Aufbau des Sackes 1 ist nicht Teil dieser Erfindung und wird daher nicht naher erläutert. Er kann auch einen völlig anderen Aufbau aufweisen. Sacke dieser Ausbildung oder auch anderer für die Erfindung geeigneter Formgebung aus Papier oder Kunststoff sind bekannt. Im Bereich der Füll- und Entnahmeoffnung 11 des Sackes 1 sind an den Vorder- und Hinterwanden 5 und 7 Verschlussbander 13 und 15 angebracht. Die vorzugsweise durch Extrudieren hergestellten Verschlussbander 13 und 15 sind üblicherweise mit der Vorder- und der Hinterwand 5 und 7 verklebt oder heiss gesiegelt. Die Art der Verklebung ist abhangig vom Material sowohl des Sackes 1 als auch der Verschlussbander 13, 15.The sack 1 shown in FIG. 1 has two narrow side walls 3 and a front wall 5 and a rear wall 7, which are tightly connected to one another at the bottom by a bottom 9. The structure of the bag 1 is not part of this invention and is therefore not explained in detail. It can also have a completely different structure. Sacks of this design or other shapes of paper or plastic suitable for the invention are known. In the area of the filling and removal opening 11 of the bag 1, closure straps 13 and 15 are attached to the front and rear walls 5 and 7. The sealing tapes 13 and 15, which are preferably produced by extrusion, are usually glued or hot-sealed to the front and rear walls 5 and 7. The type of gluing depends on the material of both the bag 1 and the closure tape 13, 15.
Zur Erläuterung der Erfindung wird beispielsweise ein Verschlussbandpaar 13, 15 mit einem in bekannter Weise ausgebildeten rillenformigen Profil- oder Schnappverschluss 11, bestehend aus einem Rillenteil und einem hakenförmigen Teil, der in der Rille elastisch einschnappbar ist und als wiederverschliessbarer Verschluss dient, dargestellt und beschrieben.To explain the invention, for example, a pair of fastener tapes 13, 15 with a groove-shaped profile or snap fastener 11 formed in a known manner, consisting of a groove part and a hook-shaped part, which can be snapped into the groove and serves as a reclosable fastener, is shown and described.
Entlang den Unterkanten sind die beiden Bander 13 und 15 mit je einer Oberkante der Wände 5 und 7 unlösbar verbunden. Zwischen den rillen- bzw. hakenförmigen Teilen der beiden Bander 13,15 sind in gerader Linie (auf der linken Hälfte des Verschlusses dargestellt) oder in Zickzacklinie (auf der rechten Hälfte des Verschlusses dargestellt) eine Mehrzahl feiner punktformiger Schweissungen 17 angebracht. Die Abstände der Schweisspunkte 17 sind bevorzugterweise gleich; sie können auch in bestimmten Bereichen einen grosseren gegenseitigen Abstand aufweisen, um beispielsweise an einer Stelle das Aufreissen zu erleichtern. So kann beispielsweise der Abstand der letzten beiden Schweisspunkte das Hineinfuhren eines Fingers zum Auseinanderreissen der benachbarten Schweisspunkte vergrossert sein.Along the lower edges, the two bands 13 and 15 are permanently connected to an upper edge of the walls 5 and 7. Between the groove-shaped or hook-shaped parts of the two bands 13, 15, a plurality of fine spot welds 17 are provided in a straight line (shown on the left half of the closure) or in a zigzag line (shown on the right half of the closure). The distances between the welding points 17 are preferably the same; they can also have a larger mutual distance in certain areas, for example, at one point To facilitate tearing open. For example, the distance between the last two welding points can be increased by inserting a finger to tear apart the adjacent welding points.
Die Schweisspunkte 17 können mit Sonotroden eines Ultraschall-Schweissgerats 25 oder durch einThe welding points 17 can be made using sonotrodes of an ultrasonic welding device 25 or by means of a
Ther oschweissgerat angebracht werden. In einer bevorzugten Ausgestaltung der Erfindung werden die Schweisspunkte 17 unmittelbar nach dem Extrudieren und Zusammenfügen der Bander 13,15 durch ein Stachelrad 21, dessen Stacheln 23 in Kontakt mit der Sonotrode 25 des US-Schweissgerats 19 gelangen, kontinuierlich erzeugt (Figur 4). Alternativ kann ein Kamm 27 mit Zahnen 29 in Kontakt mit der Sonotrode 25 gebracht und die dazwischenliegenden Bander 13,15 verschweissen (Figur 3). Letztere Ausfuhrung kann stationär sein und zum Schweissen bereits konfektionierter Sacke 1 eingesetzt werden. Werden der Kamm 27 und die Sonotrode 25 auf einem Schlitten 31 fahrbar gelagert, so können Schweisspunkte 17 durch Nachfuhren des Kamms 27 und der Sonotrode 25 auf einem kontinuierlich laufenden Verschlussbandpaar angebracht werden.Ther oschweissgerat be attached. In a preferred embodiment of the invention, the welding spots 17 are generated continuously immediately after the extrusion and assembly of the strips 13, 15 by a spike wheel 21, the spikes 23 of which come into contact with the sonotrode 25 of the US welding device 19 (FIG. 4). Alternatively, a comb 27 with teeth 29 can be brought into contact with the sonotrode 25 and the bands 13, 15 between them can be welded (FIG. 3). The latter embodiment can be stationary and can be used for welding bags 1 that have already been assembled. If the comb 27 and the sonotrode 25 are movably mounted on a carriage 31, welding spots 17 can be attached to a continuously running pair of fastener tapes by tracking the comb 27 and the sonotrode 25.
Die Schweisspunkte 17 weisen je nach Grosse des Sacks 1 und der damit zusammenhangenden Dicke des Materials der Bander 13,15 unterschiedliche Durchmesser auf. Die Durchmesser können zwischen einem halben Millimeter bis zu mehreren Millimetern betragen. Der Betrag des Durchmessers zusammen mit der Qualität des Bandmaterials ergeben schlussendlich die Festigkeit, welche beansprucht wird.The welding points 17 have different diameters depending on the size of the bag 1 and the associated thickness of the material of the strips 13, 15. The diameters can range from half a millimeter to several millimeters. The amount of the diameter together with the quality of the strip material, the strength ultimately results, which is claimed.
Das Aufreissen des nicht wiederverschliessbaren Verschlusses ist ausserst einfach. Man erfasst die beiden Rander der Verschlussbander 13,15 und zieht diese auseinander. Beim Auseinanderziehen brechen die Schweisspunkte 17 oder die Schweisspunkte 17 bleiben an einem der beiden Rander 13 oder 15 erhalten und am andern Rand 15 oder 13 entstehen kleiner Perforationen. Statt die beiden Rander 13,15 auseinanderzuziehen kann auch ein Finger zwischen zwei Schweisspunkte 17 eingeführt und anschliessend in Richtung der Schweiεspunktlinie gefuhrt und so die Schweisspunkte 17 nacheinander gelost werden.The opening of the non-resealable closure is extremely easy. The two edges of the fastening straps 13, 15 are grasped and pulled apart. When pulling apart, the welding points 17 or the welding points 17 remain on one of the two edges 13 or 15 and small perforations are formed on the other edge 15 or 13. Instead of pulling the two edges 13, 15 apart, a finger can also be inserted between two welding points 17 and then guided in the direction of the welding point line, so that the welding points 17 can be released one after the other.
Unabhängig davon, wie die Schweisspunkte 17 zwischen die beiden Teile des Verschlussbandes eingebracht worden sind, wird beim Auseinanderziehen die Verbindung definitiv und sichtbar gelost. Diese Art der Verbindung stellt daher auch einen Erstoffnungsschutz dar und verunmoglicht es Dritten, sich Zugang zum Sackinnern zu verschaffen, ohne dass Spuren hinterlassen werden. Regardless of how the welding spots 17 have been introduced between the two parts of the fastener tape, the connection is definitely and visibly released when pulled apart. This type of connection therefore also serves as protection against fabrication and makes it impossible for third parties to gain access to the inside of the bag without leaving any traces.

Claims

Patentansprüche claims
1. Aufreissbarer Verschluss für die Entnahmeöffnung (11) für einen Papier- oder Kunststoffsack (1) , gekennzeichnet durch eine Mehrzahl von feinen Schweisspunkten (17), die die zwei den wiederverschliessbaren Verschluss tragenden Verschlussbander (13,15) beidseitig miteinander verschweissen .1. Tearable closure for the removal opening (11) for a paper or plastic sack (1), characterized by a plurality of fine welding spots (17) which weld the two closure bands (13, 15) carrying the reclosable closure together on both sides.
2. Verschluss nach Anspruch 1, dadurch gekennzeichnet, dass die Schweisspunkte (17) oberhalb den mit dem Sack (1) an der Entnahmeoffnung (11) zu verschweissen bestimmten Bereichen der Verschlussbander (13,15) angeordnet sind.2. Closure according to claim 1, characterized in that the welding points (17) are arranged above the regions of the closure band (13, 15) to be welded with the bag (1) at the removal opening (11).
3. Verschluss nach einem der Ansprüche 1 oder 2 , dadurch gekennzeichnet, dass die Schweisspunkte (17) in gleichen oder unterschiedlichen gegenseitigen Abständen in einer Geraden oder einer Zick-Zacklinie angebracht sind.3. Closure according to one of claims 1 or 2, characterized in that the welding points (17) are attached at the same or different mutual intervals in a straight line or a zigzag line.
4. Verschluss nach einem der Ansprüche 1 bis 3 , dadurch gekennzeichnet, dass die Schweisspunkte (17) einen Durchmesser zwischen 0,5mm und 5mm aufweisen. 4. Closure according to one of claims 1 to 3, characterized in that the welding spots (17) have a diameter between 0.5mm and 5mm.
5. Verschluss nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Schweisspunkte (17) durch Ultraschall- oder durch Thermoschweissung erzeugt sind.5. Closure according to one of claims 1 to 4, characterized in that the welding points (17) are produced by ultrasound or by thermal welding.
6. Verschluss nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Schweisspunkte (17) durch ein mit einer Sonotrode (25) zusammenwirkendes Stachelrad6. Closure according to one of claims 1 to 5, characterized in that the welding spots (17) by a spike wheel cooperating with a sonotrode (25)
(21) und einer mit diesem zusammenwirkenden Sonotrode(21) and a sonotrode interacting with it
(25) kontinuierlich erzeugt werden.(25) are generated continuously.
7. Verschluss nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Schweisspunkte (17) mit einem stationär angeordneten Kamm (27) diskontinuierlich erzeugt werden.7. Closure according to one of claims 1 to 5, characterized in that the welding spots (17) with a stationary comb (27) are produced discontinuously.
8. Verschluss nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Schweisspunkte (17) mit einem fahrbar angeordneten Kamm (27) kontinuierlich erzeugt werden. 8. Closure according to one of claims 1 to 5, characterized in that the welding spots (17) with a mobile comb (27) are generated continuously.
PCT/CH2000/000539 1999-10-11 2000-10-04 Tearable guarantee closure WO2001026987A1 (en)

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Application Number Priority Date Filing Date Title
AU74009/00A AU7400900A (en) 1999-10-11 2000-10-04 Tearable guarantee closure

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CH1852/99 1999-10-11
CH185299 1999-10-11

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
FR2854833A1 (en) * 2003-05-16 2004-11-19 S2F Flexico Method for making sachets comprises forming sachet having closing assembly on mouth and two flaps extending sachet principal walls beyond closing assembly, flaps separated from each other at end lateral edges
WO2005100197A2 (en) * 2004-04-15 2005-10-27 Teich Aktiengesellschaft Lid provided with extracting openings for closing a container
EP2292520A1 (en) 2009-09-04 2011-03-09 Focke & Co. (GmbH & Co. KG) Tobacco pouch
DE102012219692A1 (en) 2011-11-02 2013-05-02 Dürr Systems GmbH Filter system for use in paint shop for coating workpieces such as vehicle body, has processing device that is provided for processing paint overspray and filter aid material
DE102013208592A1 (en) 2013-05-10 2014-11-13 Dürr Systems GmbH Regenerable separator for dry separation

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US3172443A (en) * 1962-02-19 1965-03-09 Ausnit Steven Plastic fastener
FR2588246A1 (en) * 1985-08-27 1987-04-10 Flexico France Sarl BAG HAVING A PLASTIC SLIDING CLOSURE ON A WALL STRIP, THE CLOSING AND STRIP MATERIALS ARE INCOMPATIBLE IN MERGING, AND PROCESS FOR MAKING SAID BAG
EP0422847A1 (en) * 1989-10-11 1991-04-17 Oscar Mayer Foods Corporation Package having peel seal tamperevidence message
US5224779A (en) 1989-02-24 1993-07-06 Oscar Mayer Foods Corporation Tamper-evident, reclosable flexible packages
JPH11165744A (en) * 1997-12-01 1999-06-22 Seisan Nipponsha Kk Synthetic resin bag body

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172443A (en) * 1962-02-19 1965-03-09 Ausnit Steven Plastic fastener
FR2588246A1 (en) * 1985-08-27 1987-04-10 Flexico France Sarl BAG HAVING A PLASTIC SLIDING CLOSURE ON A WALL STRIP, THE CLOSING AND STRIP MATERIALS ARE INCOMPATIBLE IN MERGING, AND PROCESS FOR MAKING SAID BAG
US5224779A (en) 1989-02-24 1993-07-06 Oscar Mayer Foods Corporation Tamper-evident, reclosable flexible packages
EP0422847A1 (en) * 1989-10-11 1991-04-17 Oscar Mayer Foods Corporation Package having peel seal tamperevidence message
JPH11165744A (en) * 1997-12-01 1999-06-22 Seisan Nipponsha Kk Synthetic resin bag body

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2854833A1 (en) * 2003-05-16 2004-11-19 S2F Flexico Method for making sachets comprises forming sachet having closing assembly on mouth and two flaps extending sachet principal walls beyond closing assembly, flaps separated from each other at end lateral edges
WO2005100197A2 (en) * 2004-04-15 2005-10-27 Teich Aktiengesellschaft Lid provided with extracting openings for closing a container
WO2005100197A3 (en) * 2004-04-15 2006-03-23 Teich Ag Lid provided with extracting openings for closing a container
US7740730B2 (en) 2004-04-15 2010-06-22 Teich Ag Method of closing a container with a lid
EP2292520A1 (en) 2009-09-04 2011-03-09 Focke & Co. (GmbH & Co. KG) Tobacco pouch
DE102009040096A1 (en) * 2009-09-04 2011-03-10 Focke & Co.(Gmbh & Co. Kg) tobacco pouch
EP2292520B1 (en) * 2009-09-04 2016-10-12 Focke & Co. (GmbH & Co. KG) Tobacco pouch
DE102012219692A1 (en) 2011-11-02 2013-05-02 Dürr Systems GmbH Filter system for use in paint shop for coating workpieces such as vehicle body, has processing device that is provided for processing paint overspray and filter aid material
WO2013064534A1 (en) 2011-11-02 2013-05-10 Dürr Systems GmbH Apparatus for the preparation of particulate auxiliary material
DE102013208592A1 (en) 2013-05-10 2014-11-13 Dürr Systems GmbH Regenerable separator for dry separation

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