Cap design for an inkjet print head with hand-held imaging element arrangement with integrated cleaning mechanism

• US 8,322,816 B1
• Filed: 02/10/2012
• Issued: 12/04/2012
• Est. Priority Date: 02/28/2007
• Status: Active Grant

• Current Assignee: Marvell Asia Pte Limited (Marvell Technology Group Limited)
• Original Assignee: Marvell International Limited (Marvell Technology Group Limited)
• Inventors: Simmons, Asher
• Primary Examiner(s): Lepisto, Ryan
• Application Number:
  US13/371,191
• Time in Patent Office: 298 Days
• Field of Search: 347/29, 347/32, 347/33, 347/40, 347/47, 347/109
• US Class Current: 347/29
• CPC Class Codes: B41J 2/14016 Structure of bubble jet print heads
• CPC Class Codes: B41J 2/16505 Caps, spittoons or covers for cleaning or preventing drying out
• CPC Class Codes: B41J 2/16538 with brushes or wiper blades perpendicular to the nozzle plate
• CPC Class Codes: B41J 2002/14379 Edge shooter
• CPC Class Codes: B41J 2002/14459 Matrix arrangement of the pressure chambers
• CPC Class Codes: B41J 3/36 for portability , i.e. hand-held printers or laptop printers B41J3/4075 takes precedence

Abstract

The hand-held printer includes a print module configured for multidirectional printing, a print head in communication with the print module. The print head includes a plurality of nozzle arrays and wherein the nozzles in each of the plurality of nozzle are disposed substantially equidistant from a reference point. The hand-held printer further includes a circular cap configured to rotatably cooperate with the print head, wherein the circular cap cooperates with the print head to define a seal when the circular cap is disposed in a closed position.

Claims

1. A cleaning mechanism for a hand-held printer, the cleaning mechanism comprising:

a circular cap configured to rotatably cooperate with a print head to define a seal when the circular cap is in a closed position, wherein the print head comprises a plurality of nozzle arrays disposed substantially equidistant from a scanning device; and

a sensor pad disposed adjacent to the scanning device when the circular cap is in the closed position.

2. The cleaning mechanism of claim 1, further comprising:

a cleaning pad configured to rotatably engage the plurality of nozzle arrays.

3. The cleaning mechanism of claim 2, wherein the cleaning pad includes a plurality of wipers.

4. The cleaning mechanism of claim 3, further comprising:

a plurality of sealing gaskets, wherein each of the plurality of sealing gaskets is disposed adjacent to at least one of the plurality of wipers.

5. The cleaning mechanism of claim 1, further comprising:

a locking mechanism configured to secure the circular cap in the closed position.

6. The cleaning mechanism of claim 5, wherein the locking mechanism and the circular cap are configured to cooperate with at least one sealing gasket to establish a low pressure region adjacent to at least one of the plurality of nozzle arrays.

7. The cleaning mechanism of claim 1, further comprising:

at least one guide post supported by the circular cap, wherein the at least one guide post is configured to cooperate with the print head to guide the circular cap into contact with the plurality of nozzle arrays.

8. The cleaning mechanism of claim 7, wherein the at least one guide post is guided along a path including a spring loaded latch that when released is configured to disengage the circular cap past a detent.

9. The cleaning mechanism of claim 7, wherein the at least one guide post is guided along a path defined by an arc-length between any two nozzles in one of the plurality of nozzle arrays.

10. A method of maintaining a print head of a hand-held printer with a cleaning mechanism, the method comprising:

aligning a circular cap to a plurality of nozzle arrays of the print head of the hand-held printer, wherein the plurality of nozzle arrays are disposed substantially equidistant from a scanning device;

rotating the circular cap to a closed position, wherein the circular cap is configured to rotatably cooperate with the print head to define a seal when the circular cap is in the closed position;

engaging the plurality of nozzle arrays with a cleaning pad carried by the circular cap in the closed position of the circular cap;

and moving a sensor pad to a position adjacent to the scanning device when the circular cap is in the closed position.

11. The method of claim 10, further comprising:

creating a vacuum between the cleaning pad and the plurality of nozzle arrays.

12. The method of claim 10, further comprising:

engaging the plurality of nozzle arrays, in the closed position of the circular cap, with a plurality of wipers included on the cleaning pad in the closed position of the circular cap.

13. The method of claim 12, further comprising:

engaging the plurality of nozzle arrays with a plurality of sealing gaskets, wherein each of the plurality of sealing gaskets is disposed adjacent to at least one of the plurality of wipers.

14. The method of claim 12, further comprising:

securing the circular cap in the closed position with a locking mechanism.

15. The method of claim 10, further comprising:

establishing a low pressure region between at least one sealing gasket and at least one of the plurality of nozzle arrays by compression and then slight release of the at least one sealing gasket.

16. The method of claim 10, further comprising:

rotating at least one guide post supported by the circular cap in a guide path adjacent to the print head.

17. The method of claim 16, further comprising:

disengaging the circular cap from a locked position using a spring loaded latch in the guide path.

18. The method of claim 16, wherein the guide path is defined by an arc-length between any two nozzles in one of the plurality of nozzle arrays.

19. A method of maintaining a print head of a hand-held printer, the method comprising:

aligning a cleaning cap to a nozzle array portion of the print head of the hand-held printer;

rotating the cleaning cap to engage the nozzle array portion with a cleaning pad carried by the cleaning cap in order to seal the nozzle array portion with the cleaning cap;

creating a vacuum between the cleaning pad and the nozzle array portion as the cleaning cap is rotated to the closed position;

wherein the cleaning pad is disposed adjacent to a scanning device when the cleaning cap is in the closed position.

20. The method of claim 19, wherein rotating the cleaning cap further comprises:

wiping individual nozzles of the nozzle array portion with at least one wiper disposed on the cleaning pad, and

wherein sealing the nozzle array portion further comprises;

creating individual seals between each of individual nozzles which comprise the nozzle array portion; and

engaging at least one flexible seal gasket adjacent to each of the individual nozzles of the nozzle array portion to create the individual seals.