Ink supply arrangement for ink jet printers

• US 3,967,286 A
• Filed: 12/26/1974
• Issued: 06/29/1976
• Est. Priority Date: 12/28/1973
• Status: Expired due to Term

• Current Assignee: Facit AB
• Original Assignee: Facit AB
• Inventors: Andersson, Roger Ingemar, Sultan, Stig Bertil
• Primary Examiner(s): Hartary, Joseph W.
• Application Number:
  US05/536,607
• Time in Patent Office: 551 Days
• Field of Search: 346/140
• US Class Current: 347/87
• CPC Class Codes: B41J 2/175 Ink supply systems ; Circuit parts therefor

Abstract

An ink reservoir and supply arrangement associated with a printing head of an ink jet printer having means for filling the supply device automatically. The device is arranged to follow the movements of the printing head along an adjacent recording medium. A liquid filling member is adapted to transfer the liquid from the storing device to the supply device.

Claims

1. An ink jet printing device for recording medium comprising a printing head adapted to move back and forth along said recording medium and provided with a plurality of output nozzles through which ink droplets are propelled onto the recording medium to selectively form indicia thereon, a pumping chamber for each nozzle being in communication therewith, an ink reservoir, at least one channel connecting said ink reservoir with said pumping chambers, means mounting said ink reservoir for movement which follows the movement of said printing head, said reservoir continuously feeding the pump chambers with ink through said channel, and a fixed liquid supply device arranged to co-act with said reservoir in one or both end positions of said printing head in order to automatically refill said reservoir.

2. The combination as claimed in claim 1 further comprising a liquid absorbing material in said ink reservoir.

3. The combination as claimed in claim 2 wherein said liquid absorbing material fills said ink reservoir.

4. The combination as claimed in claim 2 wherein said liquid supply device comprises a wick that communicates with the liquid stored therein and co-acts with an opening in the ink reservoir.

5. The combination as claimed in claim 4 wherein said wick and said liquid absorbing material are constituted of a porous material, the pores of which form capillaries for the liquid.

6. The combination as claimed in claim 1 wherein said liquid supply device comprises a wick that communicates with the liquid stored therein and co-acts with an opening in the ink reservoir.

7. The combination as claimed in claim 6 wherein the end of said wick projects from said liquid supply device and is adapted to be inserted in said opening to deliver liquid to said reservoir.

8. The combination as claimed in claim 6 wherein said liquid supply device comprises a receptacle and a flexible disposable container therein, the latter being provided with the printing liquid for the printing head of said ink jet printer.

9. The combination as claimed in claim 8 further comprising a wick having one end projecting through a side wall of said disposable container.

10. The combination as claimed in claim 9 wherein said receptacle is provided with an opening through which the end of said wick protrudes, said receptacle functioning as a holder for said disposable container.