Bridging wick and method for an inkjet printhead

• US 7,192,129 B2
• Filed: 12/20/2004
• Issued: 03/20/2007
• Est. Priority Date: 12/20/2004
• Status: Active Grant

• Current Assignee: Funai Electric Co., Ltd.
• Original Assignee: Lexmark International Incorporated (Ninestar Corporation)
• Inventors: Anderson, Frank E., Norasak, Sam, Droege, Curtis R., Ubellacker, Kent L., Gibson, Bruce, Trebolo, Ann M., Chalin, Adam N.
• Primary Examiner(s): Vo; Anh T. N.
• Application Number:
  US11/018,025
• Publication Number:
  US 20060132553A1
• Time in Patent Office: 820 Days
• Field of Search: 347/49, 347/85, 347/86, 347/87
• US Class Current: 347/87
• CPC Class Codes: B41J 2/17513 Inner structure

Abstract

Some embodiments of the present invention provide an inkjet printhead within which a removable ink cartridge can be installed. Upon installation, the ink cartridge can be coupled to one or more wicks in the printhead for establishing fluid communication between one or more chambers in the ink cartridge and nozzles through which ink exits the printhead during operation. The wick can extend from a cartridge receptacle to a substantially enclosed ink reservoir in order to transport ink from the removable cartridge to the ink reservoir.

Claims

1. A printhead adapted to receive a removable ink cartridge, the printhead comprising:

a receptacle dimensioned to receive the removable ink cartridge;

a reservoir separated from the receptacle by a barrier;

an ink retaining medium in the reservoir; and

a wick extending from the receptacle to the reservoir, wherein the wick is positioned to be operatively coupled to the removable ink cartridge when the removable ink cartridge is installed in the receptacle, and is operatively coupled to the ink retaining medium in the reservoir.

2. The printhead as claimed in claim 1, further comprising an outlet through which ink exits the reservoir, wherein the ink retaining medium is located in a fluid path of ink extending from the wick to the outlet.

3. The printhead as claimed in claim 2, wherein the wick is positioned to contact an outlet of the removable ink cartridge when the removable ink cartridge is installed in the receptacle.

4. The printhead as claimed in claim 1, wherein the wick includes a protrusion that extends into an outlet of the removable ink cartridge when the removable ink cartridge is installed in the receptacle.

5. The printhead as claimed in claim 1, wherein the wick is folded to a wall in the receptacle.

6. The printhead as claimed in claim 1, wherein the barrier is a wall located between the receptacle and the reservoir.

7. The printhead as claimed in claim 6, wherein the wick extends from one side of the wall to an opposite side of the wall.

8. The printhead as claimed in claim 1, wherein the ink retaining medium comprises felt.

9. The printhead as claimed in claim 1, wherein the wick transports ink via capillary flow to the ink retaining medium.

10. The printhead as claimed in claim 1, wherein:

the receptacle and the reservoir each have a bottom and a top, respectively; and

the wick is an elongated piece of material extending from the bottom of the receptacle to the bottom of the reservoir.

11. The printhead as claimed in claim 1, further comprising an ink flow path through the printhead, the ink flow path extending from the receptacle to the ink retaining medium through the wick, the ink flow path further extending from the ink retaining medium to at least one outlet of the printhead.

12. The printhead as claimed in claim 11, further comprising a filter tower through which ink flows from the ink retaining medium toward the at least one outlet.

13. The printhead as claimed in claim 1, wherein the wick is permanently secured to the printhead.

14. The printhead as claimed in claim 1, further comprising a lid movable between open and closed positions to open and close the receptacle, respectively.

15. The printhead as claimed in claim 14, wherein the lid compresses the removable ink cartridge against the wick in the closed position of the lid.

16. The printhead as claimed in claim 1, wherein the receptacle is shaped to releasably engage the removable ink cartridge via at least one snap-fit connection.

17. The printhead as claimed in claim 16, wherein the at least one snap-fit connection presses the removable ink cartridge toward the wick.

18. The printhead as claimed in claim 1, wherein:

the ink retaining medium is substantially entirely enclosed within the reservoir of the printhead; and

a portion of the wick is positioned to be exposed to an inside of the receptacle when the ink cartridge is removed from the receptacle.

19. The printhead as claimed in claim 1, further comprising at least one door movable to and from a closed position in which the at least one door substantially closes at least a portion of the receptacle in which the wick is located.

20. The printhead as claimed in claim 19, wherein the at least one door is biased to close when the ink cartridge is removed from the receptacle.

21. An ink cartridge configured to operatively cooperate with the printhead of claim 1.

22. The ink cartridge of claim 21, wherein felt is disposed in the cartridge for retaining ink.

23. A printhead for printing with ink from a removable ink cartridge having an outlet, the printhead comprising:

a housing having a plurality of walls;

first and second chambers at least partially defined by the plurality of walls and separated by a first wall of the plurality of walls;

an ink retaining medium in the second chamber;

a nozzle plate coupled to the housing, having at least one nozzle through which ink exits the printhead, and supplied by ink from the ink retaining medium; and

a wick extending from the first chamber, past the first wall, and into the second chamber, the wick adapted to carry ink via capillary action from the outlet of the removable ink cartridge in the first chamber to the ink retaining medium in the second chamber.

24. The printhead as claimed in claim 23, wherein a portion of the wick is positioned to contact the outlet of the removable ink cartridge when the removable ink cartridge is installed within the first chamber.

25. The printhead as claimed in claim 23, wherein the ink retaining medium is positioned to receive ink from the wick and to supply ink toward the nozzle.

26. The printhead as claimed in claim 23, wherein:

the first and second chambers each have a bottom; and

the wick extends from the bottom of the first chamber to the bottom of the second chamber.

27. The printhead as claimed in claim 23, wherein the wick is permanently secured to the printhead.

28. The printhead as claimed in claim 23, further comprising a lid movable between open and closed positions to open and close the first chamber, respectively.

29. The printhead as claimed in claim 28, wherein the lid is positioned to compress the removable ink cartridge when the lid is in the closed position.

30. The printhead as claimed in claim 29, wherein the lid is positioned to compress the outlet of the removable ink cartridge against the wick when the lid is in the closed position.

31. The printhead as claimed in claim 23, wherein the first chamber is shaped to receive the removable ink cartridge with at least one snap-fit connection.

32. The printhead as claimed in claim 31, wherein the at least one snap-fit connection presses the removable ink cartridge toward the wick.

33. The printhead as claimed in claim 23, wherein:

the ink retaining medium is substantially entirely enclosed within the second chamber; and

the ink retaining medium is in fluid communication with the first chamber only through the wick.

34. An ink cartridge configured to operatively cooperate with the printhead of claim 23.

35. The ink cartridge of claim 34, wherein felt is disposed in the cartridge for retaining ink.

36. A printhead, comprising:

a housing;

a nozzle through which ink exits the printhead;

a first chamber in the housing;

a second chamber in the housing and separated from the first chamber by a wall;

a removable ink cartridge in the first chamber, the removable ink cartridge having an

outlet through which ink exits the removable ink cartridge;

an ink retaining medium in the second chamber, the ink retaining medium located in a

path of ink flow from the first chamber to the nozzle; and

a wick having

a first portion in capillary fluid communication with the outlet of the removable ink cartridge; and

a second portion in capillary fluid communication with the ink retaining medium in the second chamber;

wherein the ink retaining medium is supplied with ink from the removable ink cartridge via the wick.

37. The printhead as claimed in claim 36, wherein the wick is in contact with the outlet of the removable ink cartridge.

38. The printhead as claimed in claim 36, further comprising a lid movable between opened and closed positions to open and close the second chamber, respectively.

39. The printhead as claimed in claim 38, wherein the lid compresses the removable ink cartridge when the lid is in the closed position.

40. The printhead as claimed in claim 38, wherein the lid presses the outlet of the removable ink cartridge toward the wick when the lid is in the closed position.

41. The printhead as claimed in claim 36, wherein the removable ink cartridge is coupled within the first chamber by at least one snap-fit connection.

42. The printhead as claimed in claim 41, wherein the at least one snap-fit connection compresses the removable ink cartridge.

43. The printhead as claimed in claim 41, wherein the at least one snap-fit connection presses the outlet of the removable ink cartridge toward the wick.

44. The printhead as claimed in claim 41, wherein the first portion of the wick extends to a location where the first portion is exposed to an interior of the first chamber when the ink cartridge is removed from the printhead.

45. An ink cartridge configured to operatively cooperate with the printhead of claim 36.

46. The ink cartridge of claim 45, wherein felt is disposed in the cartridge for retaining ink.