Ink-supply tank for a dot matrix printer

• US 5,615,957 A
• Filed: 06/05/1995
• Issued: 04/01/1997
• Est. Priority Date: 05/22/1984
• Status: Expired due to Term

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Suzuki, Takashi, Miyazawa, Yoshinori, Matsuzawa, Masanao
• Primary Examiner(s): WIECKING, DAVID
• Application Number:
  US08/465,163
• Time in Patent Office: 666 Days
• Field of Search: 400/124.1, 400/470, 400/471, 400/471.1, 347/24, 347/43, 347/84-87, 347/92-94
• US Class Current: 400/124.1
• CPC Class Codes: B41J 2/17503 Ink cartridges
• CPC Class Codes: B41J 2/17513 Inner structure
• CPC Class Codes: B41J 2/255 Arrangement of the print ends of the wires
• CPC Class Codes: B41J 2/305 Ink supply apparatus ink ribbons, ink-ribbon mechanisms B41J31/00 - B41J35/00

Abstract

An ink-supplied wire dot matrix printer head for actuating wires with ink attached to tip ends thereof into contact with a sheet of print paper to transfer ink to the sheet, thereby forming ink dots thereon. The ink-supplied wire dot matrix printer head includes a wire guide member having a wire guide hole for guiding the tip end of the wire, and an ink tank containing an ink absorbing body therein and having an ink supply port in which a portion of the wire guide member is inserted. The wire guide member has a capillary ink path communicating with a side of the wire and supplied with ink from the ink absorbing body.

Claims

1. A dot matrix printer comprising:

a printing apparatus;

an ink supply system mounted in said printing apparatus; and

an ink supply tank mounted in said printing apparatus, said ink supply tank operatively engaging with said printing apparatus through said ink supply system, said ink supply tank dimensioned to accommodate ink therein to be delivered to said ink supply system, said ink supply tank comprising;

a tank housing having an interior space defined in part by first and second spaced opposed walls;

an ink supply delivery port extending through a first wall of said tank housing said port having an opening to said interior space to permit the passage of ink from said interior space to the exterior of said tank housing; and

an ink absorbing member substantially filling said interior space of said tank housing and being formed of a porous material, said ink absorbing member having a region facing and at least in part engaging said opening to said ink supply delivery port;

said second wall of said tank housing being spaced at least in part sufficiently apart from said ink absorbing member to provide an air communication space therebetween, said tank housing being formed with an air communication hole therethrough, said air communication space being in fluid communication with ambient air through said air communication hole.

2. The dot matrix printer of claim 1, wherein black ink is contained in said interior space of said tank housing.

3. The dot matrix printer of claim 1, wherein ink of a color other than black is contained in said tank housing.

4. The dot matrix printer of claim 1, wherein said tank housing is formed with a plurality of ink supply sections, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space and air communication hole, each of said respective interior spaces of said ink supply sections carrying ink of a different color.

5. The dot matrix printer of claim 1, wherein said tank housing is formed with three separate ink supply sections, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space and air communication hole, each of said respective interior spaces of said three separate ink supply sections carrying ink of yellow, cyan or magenta, respectively.

6. The dot matrix printer of claim 1, wherein said tank housing defines an air passage between said air communication space and air communication hole.

7. An ink supply tank for a dot matrix printer, comprising:

a tank housing having an interior space defined in part by first and second spaced opposed walls;

an ink supply delivery port extending through a first wall of said tank housing said port having an opening to said interior space to permit the passage of ink from said interior space to the exterior of said tank housing; and

an ink absorbing member substantially filling said interior space of said tank housing and being formed of a porous material, said ink absorbing member having a region facing and at least in part engaging said opening to said ink supply delivery port;

said second wall of said tank housing being spaced at least in part sufficiently apart from said ink absorbing member to provide an air communication space therebetween, said tank housing being formed with an air communication hole therethrough, said air communication space being in fluid communication with ambient air through said air communication hole.

8. The ink supply tank of claim 7, wherein black ink is contained in said interior space of said tank housing.

9. The ink supply tank of claim 7, wherein ink of a color other than black is contained in said tank housing.

10. The ink supply tank of claim 7, wherein said tank housing is formed with a plurality of ink supply sections, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space and air communication hole, each of said respective interior spaces of said ink supply sections carrying ink of a different color.

11. The ink supply tank of claim 7, wherein said tank housing is formed with three separate ink supply sections, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space and air communication hole, each of said respective interior spaces of said three separate ink supply sections carrying ink of yellow, cyan or magenta, respectively.

12. The dot matrix printer of claim 7, wherein said ink housing defines an air passage between said air communication space and air communication hole.

13. An ink supply system for a dot matrix printer, comprising:

an ink delivery system adapted to deliver ink to a dot matrix printer;

an ink supply tank mounted to deliver ink to said ink delivery system;

a tank housing having an interior space defined in part by first and second spaced opposed walls;

an ink supply delivery port extending through a first wall of said tank housing said port having an opening to said interior space to permit the passage of ink from said interior space to the exterior of said tank housing; and

an ink absorbing member substantially filling said interior space of said tank housing and being formed of a porous material, said ink absorbing member having a region facing and at least in part engaging said opening to said ink supply delivery port;

said second wall of said tank housing being spaced at least in part sufficiently apart from said ink absorbing member to provide an air communication space therebetween, said tank housing being formed with an air communication hole therethrough, said air communication space being in fluid communication with ambient air through said air communication hole.

14. The ink supply system of claim 13, wherein black ink is contained in said interior space of said ink supply tank.

15. The ink supply system of claim 13, wherein ink of a color other than black is contained in said ink supply tank.

16. The ink supply system of claim 13, wherein said tank housing is formed with a plurality of ink supply sections, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space and air communication hole, each of said respective interior spaces of said ink supply sections carrying ink of a different color.

17. The ink supply system of claim 13, wherein said tank housing is formed with three separate ink supply section, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space and air communication hole, each of said respective interior spaces of said three separate ink supply sections carrying ink of yellow, cyan or magenta, respectively.

18. The ink supply system of claim 13, wherein said ink tank housing defines an air passage between said air communication space and air communication hole.

19. A method for supplying ink to a dot matrix printer, comprising:

providing an ink supply tank having an interior space;

extending an ink supply delivery port through a first wall of said ink supply tank, said ink supply delivery port, said port having an opening to said interior space to permit the passage of ink from said interior space of said ink supply tank to the exterior of said ink supply tank;

mounting an ink absorbing member in said ink supply tank, said ink absorbing member substantially filling said interior space of said ink supply tank and being formed of a porous material, said ink absorbing member having a region facing and at least in part engaging said opening to said ink supply delivery port;

positioning a second wall of said ink supply tank opposite said first wall at least in part a sufficient space apart from said ink absorbing member to provide an air communication space therebetween;

forming an air communication hole in said ink supply tank so that said air communication space is in fluid communication with ambient air through said air communication hole; and

withdrawing ink from said interior space of said ink supply tank through said opening in said ink supply delivery port.

20. The method of claim 19, further comprising the step of providing black ink in said interior space of said ink supply tank.

21. The method of claims 19, further comprising the step of providing ink of a color other than black in said interior space of said ink supply tank.

22. The method of claim 19, further comprising the step of forming said ink supply tank with a plurality of ink supply sections, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space, and air communication hole, each of said respective interior spaces of said ink supply sections containing ink of a different color.

23. The method of claim 19, further comprising the step of forming said ink supply tank with three separate ink supply sections, each of said ink supply sections having a respective interior space, ink supply delivery port, ink absorbing member, air communication space, and air communication hole, each of said respective interior spaces of said three separate ink supply sections carrying ink of one of yellow, cyan or magenta, respectively.