Ink cartridge with residual ink retaining structure

Details Ink cartridge with residual ink retaining structure Ink cartridge with residual ink retaining structure

1995-08-10

2000-03-14

Yockey, David F.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

347 92, 347 93, B41J 2175, B41J 219

Patent

active

060363053

ABSTRACT:
An ink cartridge connectable to a print head having a supply pipe which receives a supply of ink includes a casing having a first, upper chamber and a second, lower chamber communicating with each other via a communicating hole and storing the ink, a porous body provided in the first chamber and storing the ink by a negative pressure, and a connection part provided in the second chamber and connectable to the supply pipe. The connection part has normally closed valve means for communicating the print head with the second chamber by opening when the supply pipe is inserted into the connection part. The ink cartridge includes a connecting pipe extending from the first chamber into the second chamber and a filter member covering the opening of the connecting pipe in the second chamber. The filter member releases air from the connecting pipe upwardly into an upper region of the second chamber.

REFERENCES:
patent: 2664266 (1953-12-01), Johnson
patent: 3538950 (1970-11-01), Porteners
patent: 4463359 (1984-07-01), Ayata et al.
patent: 4524724 (1985-06-01), Steudler, Jr.
patent: 5070346 (1991-12-01), Mochizuki et al.
patent: 5162817 (1992-11-01), Tajika et al.
patent: 5237342 (1993-08-01), Saikawa et al.
patent: 5477963 (1995-12-01), Mochizuki et al.
patent: 5523780 (1996-06-01), Hirosawa et al.
patent: 5552816 (1996-09-01), Oda et al.
patent: 5565899 (1996-10-01), Sugimoto et al.
patent: 5583544 (1996-12-01), Stamer et al.

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