WO2003068513A1 - Printer with capping device - Google Patents

Printer with capping device Download PDF

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Publication number
WO2003068513A1
WO2003068513A1 PCT/AU2003/000151 AU0300151W WO03068513A1 WO 2003068513 A1 WO2003068513 A1 WO 2003068513A1 AU 0300151 W AU0300151 W AU 0300151W WO 03068513 A1 WO03068513 A1 WO 03068513A1
Authority
WO
WIPO (PCT)
Prior art keywords
printer
arm
housing
pct
operational mode
Prior art date
Application number
PCT/AU2003/000151
Other languages
French (fr)
Inventor
Kia Silverbrook
Original Assignee
Silverbrook Research Pty. Ltd.
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
Priority to US10/503,887 priority Critical patent/US7144107B2/en
Application filed by Silverbrook Research Pty. Ltd. filed Critical Silverbrook Research Pty. Ltd.
Priority to AU2003202630A priority patent/AU2003202630B2/en
Priority to EP03701325A priority patent/EP1480826B1/en
Priority to CA002475615A priority patent/CA2475615C/en
Priority to DE60336711T priority patent/DE60336711D1/en
Priority to AT03701325T priority patent/ATE505330T1/en
Priority to KR1020047012484A priority patent/KR100754348B1/en
Priority to JP2003567670A priority patent/JP4204478B2/en
Publication of WO2003068513A1 publication Critical patent/WO2003068513A1/en
Priority to IL163497A priority patent/IL163497A/en
Priority to US11/583,870 priority patent/US7556371B2/en
Priority to US12/478,731 priority patent/US8042934B2/en
Priority to US13/280,322 priority patent/US8382278B2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/36—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for portability, i.e. hand-held printers or laptop printers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/165—Preventing or detecting of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
    • B41J2/16505—Caps, spittoons or covers for cleaning or preventing drying out

Definitions

  • the following invention relates to improvements in portable printer technology. More particularly, though not exclusively, the invention relates to a capping device for a hand-held drop-on-demand printer having a fixed printhead for ejecting droplets of ink onto a sheet of print media external to the printer.
  • Prior art drop-on-demand printers incorporate a supply of print media and employ a print media feed mechanism to transport the print media past the printhead or printheads to effect printing onto the print media.
  • Our co-pending application (AP43) entitled “Manually Moveable Printer with Speed Sensor” discloses a portable, hand-held drop-on-demand inkjet printer having a fixed printhead. The printer can print an image onto a sheet external to the printer by passing the casing of the printer over and across the print media as the nozzles of the printhead eject ink.
  • a capping device seals the printhead from the surrounding atmosphere to prevent evaporation of ink and the consequential blockage of the nozzles.
  • the present application is directed to specific capping arrangements for portable printers, particularly, though not exclusively, for portable printers of the type disclosed in co-pending application AP43, the contents of which are specifically incorporated herein by cross-reference.
  • a portable printer comprising: a housing, a printhead affixed within the housing and including a plurality of ink ejection nozzles configured to eject droplets of ink toward a sheet of print media external to the housing in a printing operational mode, and a capping device including an arm having a capping region that covers the ink ejection nozzles when the printer is in a non-printing operational mode and moves away from the nozzles to enable ejection of ink en route to a sheet of print media in said printing operational mode.
  • the arm is attached by a pivot to the housing.
  • the arm includes an activation region to one side of the pivot and a leg to the other side of the pivot, the leg extending in a direction substantially normal to the activation region and including said capping region.
  • an elastomeric pad is attached to the capping region.
  • the arm is formed of a resilient, elastically deformable material being affixed at an end thereof to the housing.
  • the housing can include a fulcrum and said arm includes an activation region to one side of said fulcrum and a leg to the other side of the fulcrum, the leg extending in a direction substantially normal to the activation region and including said capping region.
  • the housing can have mounted thereto a wheel by which the housing rides over a sheet of print media in said printing operational mode, the wheel having associated therewith a friction clutch, the friction clutch including activation means for deflecting said capping region of the arm upon rotation of said wheel in said printing operational mode.
  • said activation means can comprise a peg projecting from the friction clutch.
  • the arm can be formed from an elastically deformable material including a deviation and wherein the peg bears against the deviation.
  • the arm can be attached to the housing by an integral spring and the printer further comprises an eccentric cam upon a shaft, the eccentric cam bearing against the arm and rotatable to deflect the arm so as to move said capping region away from the nozzles to enable ejection of ink in said printing operational mode.
  • the printer can include a solenoid within the housing disposed with respect to the arm such that upon energization of the solenoid magnetic force draws the arm thereto so as to move said capping region away from the nozzles to enable ejection of ink in said printing operational mode.
  • the arm can have attached thereto a metal plate to interact with the solenoid.
  • the arm can include an integral spring interacting with the solenoid so as to bias the arm away from the solenoid.
  • Figure 1 is a schematic cross-sectional end elevational view of a portable printer showing a first capping device in a capped position;
  • Figure 2 is a schematic cross-sectional end elevational view of the portable printer of Figure 1 with the first capping device shown in an uncapped position;
  • Figure 3 is a schematic cross-sectional end elevational view of a portable printer having a second type of capping device, in a capped position;
  • Figure 4 is a schematic cross-sectional end elevational view of the printer of Figure 3 with the second capping device, in an uncapped position
  • Figure 5 is a schematic cross-sectional end elevational view of a portion of another printer having a third type of capping device, in a capped position
  • Figure 6 is a schematic cross-sectional elevational view of a portion of the printer of Figure 5 with the third capping device in an uncapped position;
  • Figure 7 is a schematic front elevational view of a friction clutch used in the embodiment of Figures 5 and 6;
  • Figure 8 is a schematic cross-sectional end elevational view of a portion of a printer having a fourth type of capping device, in a capped position;
  • Figure 9 is a schematic cross-sectional end elevational view of a portion of the printer of Figure 8 with the fourth capping device shown in an uncapped configuration
  • Figure 10 is a schematic cross-sectional end elevational view of a portion of a printer having a fifth type of capping device, in a capped configuration
  • Figure 11 is a schematic cross-sectional end elevational view of the portion of the printer of Figure 10 with the fifth capping device shown in an uncapped configuration.
  • the printhead 11 has a print chip 12 extending throughout its full width, that is, the width of an image to be printed.
  • the capper arm 13 resides at the exterior of the housing 10 and includes a leg 28 to which there is affixed an elastomeric pad 16 which seals against the chip 12 in the capped configuration depicted in Figure 1.
  • the elastomeric pad 16 is moved away from the print chip 12 by leg 28 to enable printing in the configuration depicted in Figure 2.
  • the capper arm 13 includes an activating region 15 to which finger force can be applied as indicated by arrow F shown in Figure 2.
  • the application of such finger force causes pivoting of the capper arm 13 about pivot 14.
  • a spring (not shown) can return the capper arm to the position shown in Figure 1.
  • the capper arm 13 is formed of a resilient, elastically deformable material such as metal or plastics.
  • the capper arm 13 is formed of stainless steel.
  • the capper arm 13 is fixed at 17 to the printer housing 10 at one end thereof.
  • a fulcrum 14 (depicted schematically) resides alongside the transition of the capper arm 13 to the leg 29.
  • FIG. 5 to 7 of the accompanying drawings there is schematically depicted a third embodiment of a capping device incorporating a friction clutch.
  • the printer housing 10 has mounted thereto one or more wheels 18, at least one of which can be associated with an optical sensor as described in the cross-referenced application AP43 entitled "Manually Moveable Printer with Speed Sensor".
  • One of the wheels, ie. wheel 18 in this example, can have associated with it a friction clutch 19.
  • Wheel 18 and clutch 19 can be mounted upon a common shaft 30 ( Figure 7) and biased against each other such that rotation of wheel 18 causes rotation of clutch 19 until something stops the clutch 19 from spinning, whereupon wheel 18 continues to rotate with a dynamic frictional engagement between it and the non-rotating clutch 19.
  • the friction clutch 19 has a peg 20 extending laterally from it. This peg 20 is received behind a deviated portion 21 of the capper arm 13.
  • the capper arm 13 is attached within the printer housing 10 such that portion 29 moves in a linear fashion, ie. it is guided to move in a straight line.
  • the peg 20 bears against the deviated portion 21 of capper arm 13 to move it in the direction indicated by arrow C ( Figure 6). This, in turn, draws the elastomeric pad 16 away from the chip 12. It should be appreciated in this regard that wheel 18 is riding upon the print media 22 to effect wheel rotation in the direction indicated by arrow W in Figure 6.
  • an internally driven camshaft 24 including an eccentric cam 23 In a fourth embodiment of the capping device shown in Figures 8 and 9, there is provided an internally driven camshaft 24 including an eccentric cam 23.
  • Camshaft 24 might be selectively rotated by means of an electric motor for example.
  • the capper arm 13 is mounted to a pivot 14 and is biased by an integral spring 25 against the eccentric cam 23. That is, the integral spring 25 biases the leg portion 28 of the capper arm 13 to the position depicted in Figure 8 whereat the elastomeric pad 16 seals over chip 12.
  • the camshaft 24 is rotated such that the eccentric cam rotates into the position depicted in Figure 9, the capper arm 13 deforms integral spring 25 while the elastomeric pad 16 moves away from the print chip 12.
  • FIG. 10 and 11 of the accompanying drawings there is depicted a fifth embodiment of the capping device wherein the capper arm 13 is activated by an internal solenoid 26.
  • the capper arm 13 slides linearly between the positions depicted in Figures 10 and 11.
  • the capper arm 13 includes an integral spring 25 that bears against solenoid 26.
  • the spring 25 could bear against some other fixed internal structure of the printer housing 10.
  • Attached to the capper arm 13 is a metallic plate 27 to be attracted to the solenoid 26 by magnetic interaction therewith. Application of electric current to the solenoid 26 creates a magnetic field drawing the metal plate 27 thereto. This in turn draws the capper 13 to the uncapped position where the elastomeric pad 16 has moved away from the print chip 12 to enable printing to commence.
  • the solenoid When the solenoid is no longer receiving electric current, its magnetic field diminishes or ceases enabling the spring 28 to return the capper arm 13 to the capped position depicted in Figure 10.
  • the elastomeric pad need not be affixed to the capper arm itself. Instead, it might be attached to the printhead 11 so as to surround the print chip 12 and come into sealing contact with a smooth surface of leg 28 of capper arm 13.

Abstract

A capping device seals against a print chip (12) of a printhead (11) fixed within a housing (10) of a hand-held portable printer. The capping device can be moved manually by a user or automatically by internal mechanisms to reveal the print chip for printing. The capping device includes a capper arm (13) with an activating region (15) and a perpendicular leg (28) with an elastomeric pad (16) that seals against the chip (12). The capping device can be moved by mechanisms such as a fulcrum or pivot point (14), a friction clutch (19) with peg (20), an eccentric cam (23) or an internal solenoid (26). The capper arm can be formed of a resilient, elastically deformable material such as metal or plastics. In a non-printing mode, the capping device seals the print chip to prevent evaporation of ink, drying or blockages.

Description

PRINTER WITH CAPPING DEVICE
FIELD OF THE INVENTION
The following invention relates to improvements in portable printer technology. More particularly, though not exclusively, the invention relates to a capping device for a hand-held drop-on-demand printer having a fixed printhead for ejecting droplets of ink onto a sheet of print media external to the printer.
BACKGROUND
Prior art drop-on-demand printers incorporate a supply of print media and employ a print media feed mechanism to transport the print media past the printhead or printheads to effect printing onto the print media. Our co-pending application (AP43) entitled "Manually Moveable Printer with Speed Sensor" discloses a portable, hand-held drop-on-demand inkjet printer having a fixed printhead. The printer can print an image onto a sheet external to the printer by passing the casing of the printer over and across the print media as the nozzles of the printhead eject ink.
During non-use periods of the printer, a capping device seals the printhead from the surrounding atmosphere to prevent evaporation of ink and the consequential blockage of the nozzles. The present application is directed to specific capping arrangements for portable printers, particularly, though not exclusively, for portable printers of the type disclosed in co-pending application AP43, the contents of which are specifically incorporated herein by cross-reference.
CO-PENDING APPLICATIONS
Various methods, systems and apparatus relating to the present invention are disclosed in the following co-pending applications filed by the applicant or assignee of the present invention simultaneously with the present application:
AP39 AP43 AP44 AP46 AP47 AP48
AP49 AP50 AP51 AP52 AP53 AP55
AP58 AP60 AP61 AP62 AP63 AP64
AP65 AP66 AP67 AP68 AP69 AP70
AP71 AP77 AP78 AP79
The disclosures of these co-pending applications are incorporated herein by cross-reference. Each application is temporarily identified by its file reference. This will be replaced by the corresponding PCT Application Number when available.
RELATED PATENT APPLICATIONS AND PATENTS
US6,227,652 US6,213,588 US6,213,589 US6,231,163 US6,247,795 US6,394,581 US6,244,691 US6,257,704
US6,416,168 US6,220,694 US6,257,705 US6,247,794
US6,234,610 US6,247,793 US6,264,306 US6,241,342
US6,247,792 US6,264,307 US6,254,220 US6,234,611 US6,302,528 US6,283,582 US6,239,821 US6,338,547 US6,247,796 US09/113,122 US6,390,603 US6,362,843 US6,293,653 US6,312,107 US6,227,653 US6,234,609 US6,238,040 US6,188,415 US6,227,654 US6,209,989 US6,247,791 US6,336,710 US6,217,153 US6,416,167 US6,243,113 US6,283,581 US6,247,790 US6,260,953 US6,267,469 US6,273,544 US6,309,048 US6,420,196 US6,443,558 US09/422,892 US6,378,989 US09/425,420 US09/422,893 US09/609.140 US6,409,323 US6,281,912 US09/575,113 US6,318,920 US6,488,422 US09/693.644 US6,457,810 US6,485,135 US09/112,763 US6,331,946 US6,246,970 US6,442,525 US09/505,951 US09/505,147 US09/505,952 US09/575.108 US09/575,109 US09/575.110 US09/607,985 US6,398,332 US6,394,573 US09/606,999 US6,238,044 US6,425,661 US6,390,605 US6,322,195 US09/504,221 US6,480,089 US6,460,778 US6,305,788 US6,426,014 US6,364,453 US6,457,795 US09/556.219 US09/556,218 US6,315,399 US6,338,548 US09/575,190 US6,328,431 US6,328,425 US09/575.127 US6,383,833 US6,464,332 US6,390,591 US09/575,152 US6,328,417 US6,322,194 US09/575,177 US09/575.175 US6,417,757 US09/608,780 US6,428,139 US09/607.498 US09/693,079 US09/693,135 US6,428,142 US09/692,813 US09/693,319 US09/693.311 US6,439,908 US09/693,735 PCT/AU98/00550 PCT/AUOO/00516 PCT/AU00/00517 PCT/AU00/00511 PCT/AU00/00754 PCT/AU00/00755 PCT/AU00/00756 PCT/AU00/00757 PCT/AU00/00095 PCT/AU00/00172 PCT/AU00/00338 PCT/AU00/00339 PCT/AUOO/00340 PCT/AU00/00341 PCT/AU00/00581 PCT/AUOO/00580 PCT/AU00/00582 PCT/AU00/00587 PCT/AU00/00588 PCT/AU00/00589 PCT/AU00/00583 PCT/AUOO/00593 PCT/AU00/00590 PCT/AU00/00591 PCT/AU00/00592 PCT/AU00/00584 PCT/AU00/00585 PCT/AU00/00586 PCT/AU00/00749 PCT/AUOO/00750 PCT/AU00/00751 PCT/AU00/00752 PCT/AU01/01332 PCT/AU01/01318 PCT/AU00/01513 PCT/AU00/01514 PCT/AU00/01515 PCT/AU00/01516 PCT/AU00/01517 PCT/AU00/01512 PCT/AUO 1/00502 PCT/AU02/01120 PCT/AU00/00333 PCT/AUO 1/00141 PCT/AU01/00139 PCT/AUO 1/00140 PCT/AU00/00753 PCT/AUO 1/01321 PCT/AU01/01322 PCT/AU01/01323 PCT/AU00/00594 PCT/AU00/00595 PCT/AUOO/00596 PCT/AU00/00597 PCT/AU00/00598 PCT/AU00/00741 PCT/AU00/00742 DISCLOSURE OF THE INVENTION
There is disclosed herein a portable printer comprising: a housing, a printhead affixed within the housing and including a plurality of ink ejection nozzles configured to eject droplets of ink toward a sheet of print media external to the housing in a printing operational mode, and a capping device including an arm having a capping region that covers the ink ejection nozzles when the printer is in a non-printing operational mode and moves away from the nozzles to enable ejection of ink en route to a sheet of print media in said printing operational mode.
Preferably the arm is attached by a pivot to the housing. Preferably the arm includes an activation region to one side of the pivot and a leg to the other side of the pivot, the leg extending in a direction substantially normal to the activation region and including said capping region.
Preferably an elastomeric pad is attached to the capping region.
Alternatively the arm is formed of a resilient, elastically deformable material being affixed at an end thereof to the housing.
In this alternative the housing can include a fulcrum and said arm includes an activation region to one side of said fulcrum and a leg to the other side of the fulcrum, the leg extending in a direction substantially normal to the activation region and including said capping region.
Alternatively again, the housing can have mounted thereto a wheel by which the housing rides over a sheet of print media in said printing operational mode, the wheel having associated therewith a friction clutch, the friction clutch including activation means for deflecting said capping region of the arm upon rotation of said wheel in said printing operational mode.
In this alternative said activation means can comprise a peg projecting from the friction clutch.
In this alternative the arm can be formed from an elastically deformable material including a deviation and wherein the peg bears against the deviation.
In a further alternative the arm can be attached to the housing by an integral spring and the printer further comprises an eccentric cam upon a shaft, the eccentric cam bearing against the arm and rotatable to deflect the arm so as to move said capping region away from the nozzles to enable ejection of ink in said printing operational mode. In yet a further alternative, the printer can include a solenoid within the housing disposed with respect to the arm such that upon energization of the solenoid magnetic force draws the arm thereto so as to move said capping region away from the nozzles to enable ejection of ink in said printing operational mode. In this alternative the arm can have attached thereto a metal plate to interact with the solenoid.
In this alternative the arm can include an integral spring interacting with the solenoid so as to bias the arm away from the solenoid.
BRIEF DESCRIPTION OF THE DRAWINGS Preferred forms of the present invention will now be described by way of example only with reference to the accompanying drawings wherein:
Figure 1 is a schematic cross-sectional end elevational view of a portable printer showing a first capping device in a capped position;
Figure 2 is a schematic cross-sectional end elevational view of the portable printer of Figure 1 with the first capping device shown in an uncapped position;
Figure 3 is a schematic cross-sectional end elevational view of a portable printer having a second type of capping device, in a capped position;
Figure 4 is a schematic cross-sectional end elevational view of the printer of Figure 3 with the second capping device, in an uncapped position; Figure 5 is a schematic cross-sectional end elevational view of a portion of another printer having a third type of capping device, in a capped position;
Figure 6 is a schematic cross-sectional elevational view of a portion of the printer of Figure 5 with the third capping device in an uncapped position;
Figure 7 is a schematic front elevational view of a friction clutch used in the embodiment of Figures 5 and 6;
Figure 8 is a schematic cross-sectional end elevational view of a portion of a printer having a fourth type of capping device, in a capped position;
Figure 9 is a schematic cross-sectional end elevational view of a portion of the printer of Figure 8 with the fourth capping device shown in an uncapped configuration; Figure 10 is a schematic cross-sectional end elevational view of a portion of a printer having a fifth type of capping device, in a capped configuration; and
Figure 11 is a schematic cross-sectional end elevational view of the portion of the printer of Figure 10 with the fifth capping device shown in an uncapped configuration.
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the accompanying drawings there are schematically depicted a number of different capping configurations for a portable printer. The portable printer is intended to eject droplets of ink onto a sheet of print media as the printer is held by hand and moved across the sheet of print media. A typical internal configuration of a printhead and associated hardware in a portable printer for which the capping devices disclosed herein are applicable is disclosed in co-pending application entitled "Manually Moveable Printer with Speed Sensor" (AP43) cross-referenced above. In Figures 1 and 2 of the accompanying drawings there is schematically depicted in cross-section, a printer housing 10 having located therein a fixed printhead 11. The printhead 11 has a print chip 12 extending throughout its full width, that is, the width of an image to be printed. A first embodiment of a capper arm 13, which may be metallic or formed of other material such as plastics, is pivotally mounted at 14 to the printer housing 10. The capper arm 13 resides at the exterior of the housing 10 and includes a leg 28 to which there is affixed an elastomeric pad 16 which seals against the chip 12 in the capped configuration depicted in Figure 1. The elastomeric pad 16 is moved away from the print chip 12 by leg 28 to enable printing in the configuration depicted in Figure 2.
The capper arm 13 includes an activating region 15 to which finger force can be applied as indicated by arrow F shown in Figure 2. The application of such finger force causes pivoting of the capper arm 13 about pivot 14. A spring (not shown) can return the capper arm to the position shown in Figure 1.
A second embodiment of the capping device is depicted in Figures 3 and 4. In this embodiment, the capper arm 13 is formed of a resilient, elastically deformable material such as metal or plastics. In a particular preferred embodiment, the capper arm 13 is formed of stainless steel. The capper arm 13 is fixed at 17 to the printer housing 10 at one end thereof. A fulcrum 14 (depicted schematically) resides alongside the transition of the capper arm 13 to the leg 29.
Upon the application of finger force F as indicated in Figure 4, the capper arm 13 deforms, resulting in the leg 29 moving to the position depicted in Figure 4 so as to draw the elastomeric pad 16 away from the print chip 12 for printing purposes. Upon release of the finger force F, the resilience of the capper returns it to the configuration depicted in Figure 3 wherein the elastomeric pad 16 seals against the print chip 12. In the first and second embodiments of the capping device shown in Figures 1 to 4, a user grasps the printer housing 10 and in doing so, inherently applies a force F to the activation region 15 of the capper arm 13. There may be provided a switch within the printer housing and associated with the capper arm 13 such that application of finger force F depresses the switch to set the printhead 11 into a printing operational mode.
In Figures 5 to 7 of the accompanying drawings there is schematically depicted a third embodiment of a capping device incorporating a friction clutch. In this embodiment, the printer housing 10 has mounted thereto one or more wheels 18, at least one of which can be associated with an optical sensor as described in the cross-referenced application AP43 entitled "Manually Moveable Printer with Speed Sensor". One of the wheels, ie. wheel 18 in this example, can have associated with it a friction clutch 19. Wheel 18 and clutch 19 can be mounted upon a common shaft 30 (Figure 7) and biased against each other such that rotation of wheel 18 causes rotation of clutch 19 until something stops the clutch 19 from spinning, whereupon wheel 18 continues to rotate with a dynamic frictional engagement between it and the non-rotating clutch 19. In the embodiment depicted, the friction clutch 19 has a peg 20 extending laterally from it. This peg 20 is received behind a deviated portion 21 of the capper arm 13. In this embodiment, the capper arm 13 is attached within the printer housing 10 such that portion 29 moves in a linear fashion, ie. it is guided to move in a straight line. Upon rotation of friction clutch 19, the peg 20 bears against the deviated portion 21 of capper arm 13 to move it in the direction indicated by arrow C (Figure 6). This, in turn, draws the elastomeric pad 16 away from the chip 12. It should be appreciated in this regard that wheel 18 is riding upon the print media 22 to effect wheel rotation in the direction indicated by arrow W in Figure 6. When the printer housing 10 is lifted away from the print media 22, rotation W ceases, whereupon resilience of the capper arm 13 pushes the peg 20 back to the position depicted at Figure 5 and at the same time returns the elastomeric pad 16 to seal the print chip 12 as shown in Figure 5.
In a fourth embodiment of the capping device shown in Figures 8 and 9, there is provided an internally driven camshaft 24 including an eccentric cam 23. Camshaft 24 might be selectively rotated by means of an electric motor for example. In this embodiment, the capper arm 13 is mounted to a pivot 14 and is biased by an integral spring 25 against the eccentric cam 23. That is, the integral spring 25 biases the leg portion 28 of the capper arm 13 to the position depicted in Figure 8 whereat the elastomeric pad 16 seals over chip 12. When the camshaft 24 is rotated such that the eccentric cam rotates into the position depicted in Figure 9, the capper arm 13 deforms integral spring 25 while the elastomeric pad 16 moves away from the print chip 12.
In Figures 10 and 11 of the accompanying drawings, there is depicted a fifth embodiment of the capping device wherein the capper arm 13 is activated by an internal solenoid 26. In this embodiment, the capper arm 13 slides linearly between the positions depicted in Figures 10 and 11. The capper arm 13 includes an integral spring 25 that bears against solenoid 26. As an alternative, the spring 25 could bear against some other fixed internal structure of the printer housing 10. Attached to the capper arm 13 is a metallic plate 27 to be attracted to the solenoid 26 by magnetic interaction therewith. Application of electric current to the solenoid 26 creates a magnetic field drawing the metal plate 27 thereto. This in turn draws the capper 13 to the uncapped position where the elastomeric pad 16 has moved away from the print chip 12 to enable printing to commence.
When the solenoid is no longer receiving electric current, its magnetic field diminishes or ceases enabling the spring 28 to return the capper arm 13 to the capped position depicted in Figure 10. It should be appreciated that modifications and alterations obvious to those skilled in the art are not to be considered as beyond the scope of the present invention. For example, the elastomeric pad need not be affixed to the capper arm itself. Instead, it might be attached to the printhead 11 so as to surround the print chip 12 and come into sealing contact with a smooth surface of leg 28 of capper arm 13.

Claims

WE CLAIM:
1. A portable printer comprising: a housing, a printhead affixed within the housing and including a plurality of ink ejection nozzles configured to eject droplets of ink toward a sheet of print media external to the housing in a printing operational mode, and a capping device including an arm having a capping region that covers the ink ejection nozzles when the printer is in a non-printing operational mode and moves away from the nozzles to enable ejection of ink en route to a sheet of print media in said printing operational mode.
2. The printer of claim 1 wherein the arm is attached by a pivot to the housing.
3. The printer of claim 2 wherein the arm includes an activation region to one side of the pivot and a leg to the other side of the pivot, the leg extending in a direction substantially normal to the activation region and including said capping region.
4. The printer of claim 3 wherein an elastomeric pad is attached to the capping region.
5. The printer of claim 1 wherein the arm is formed of a resilient, elastically deformable material being affixed at an end thereof to the housing.
6. The printer of claim 5 wherein the housing includes a fulcrum and said arm includes an activation region to one side of said fulcrum and a leg to the other side of the fulcrum, the leg extending in a direction substantially normal to the activation region and including said capping region.
7. The printer of claim 5 wherein an elastomeric pad is attached to the capping region.
8. The printer of claim 1 wherein the housing has mounted thereto a wheel by which the housing rides over a sheet of print media in said printing operational mode, the wheel having associated therewith a friction clutch, the friction clutch including activation means for deflecting said capping region of the arm upon rotation of said wheel in said printing operational mode.
9. The printer of claim 8 wherein said activation means comprises a peg projecting from the friction clutch.
10. The printer of claim 9 wherein the arm is formed from an elastically deformable material including a deviation and wherein the peg bears against the deviation.
11. The printer of claim 1 wherein the arm is attached to the housing by an integral spring and the printer further comprises an eccentric cam upon a shaft, the eccentric cam bearing against the arm and rotatable to deflect the arm so as to move said capping region away from the nozzles to enable ejection of ink in said printing operational mode.
12. The printer of claim 1 including a solenoid within the housing disposed with respect to the arm such that upon energization of the solenoid magnetic force draws the arm thereto so as to move said capping region away from the nozzles to enable ejection of ink in said printing operational mode.
13. The printer of claim 12 wherein the arm has attached thereto a metal plate to interact with the solenoid.
14. The printer of claim 13 wherein the arm includes an integral spring interacting with the solenoid so as to bias the arm away from the solenoid.
PCT/AU2003/000151 2002-02-13 2003-02-12 Printer with capping device WO2003068513A1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
AT03701325T ATE505330T1 (en) 2002-02-13 2003-02-12 PRINTER WITH COVER DEVICE
AU2003202630A AU2003202630B2 (en) 2002-02-13 2003-02-12 Printer with capping device
EP03701325A EP1480826B1 (en) 2002-02-13 2003-02-12 Printer with capping device
CA002475615A CA2475615C (en) 2002-02-13 2003-02-12 Printer with capping device
DE60336711T DE60336711D1 (en) 2002-02-13 2003-02-12 PRINTER WITH COVERING DEVICE
US10/503,887 US7144107B2 (en) 2002-02-13 2003-02-12 Printer with capping device
KR1020047012484A KR100754348B1 (en) 2002-02-13 2003-02-12 Printer with capping device
JP2003567670A JP4204478B2 (en) 2002-02-13 2003-02-12 Printer with capping device
IL163497A IL163497A (en) 2002-02-13 2004-08-11 Printer with capping device
US11/583,870 US7556371B2 (en) 2002-02-13 2006-10-20 Inkjet printer with a capping device
US12/478,731 US8042934B2 (en) 2002-02-13 2009-06-04 Capping device for hand-held printer
US13/280,322 US8382278B2 (en) 2002-02-13 2011-10-24 Capping device for hand-held printer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPS0485A AUPS048502A0 (en) 2002-02-13 2002-02-13 Methods and systems (ap44)
AUPS0485 2002-02-13

Related Child Applications (3)

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US10/503,887 A-371-Of-International US7144107B2 (en) 2002-02-13 2003-02-12 Printer with capping device
US10503887 A-371-Of-International 2003-02-12
US11/583,870 Continuation US7556371B2 (en) 2002-02-13 2006-10-20 Inkjet printer with a capping device

Publications (1)

Publication Number Publication Date
WO2003068513A1 true WO2003068513A1 (en) 2003-08-21

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PCT/AU2003/000151 WO2003068513A1 (en) 2002-02-13 2003-02-12 Printer with capping device

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US (4) US7144107B2 (en)
EP (1) EP1480826B1 (en)
JP (1) JP4204478B2 (en)
KR (1) KR100754348B1 (en)
CN (1) CN1311977C (en)
AT (1) ATE505330T1 (en)
AU (1) AUPS048502A0 (en)
CA (1) CA2475615C (en)
DE (1) DE60336711D1 (en)
IL (1) IL163497A (en)
WO (1) WO2003068513A1 (en)
ZA (1) ZA200406415B (en)

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ATE505330T1 (en) 2011-04-15
DE60336711D1 (en) 2011-05-26
EP1480826B1 (en) 2011-04-13
US7144107B2 (en) 2006-12-05
CN1630584A (en) 2005-06-22
CN1311977C (en) 2007-04-25
CA2475615C (en) 2008-01-29
US8382278B2 (en) 2013-02-26
US8042934B2 (en) 2011-10-25
US7556371B2 (en) 2009-07-07
JP2005516824A (en) 2005-06-09
EP1480826A1 (en) 2004-12-01
US20090237446A1 (en) 2009-09-24
IL163497A (en) 2006-10-31
CA2475615A1 (en) 2003-08-21
AUPS048502A0 (en) 2002-03-07
US20120038729A1 (en) 2012-02-16
EP1480826A4 (en) 2009-09-02
US20050200685A1 (en) 2005-09-15
KR20040083506A (en) 2004-10-02
ZA200406415B (en) 2005-09-27
US20070035575A1 (en) 2007-02-15
KR100754348B1 (en) 2007-08-31
JP4204478B2 (en) 2009-01-07

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