Ink cartridge system with improved volumetric capacity and metho

Details Ink cartridge system with improved volumetric capacity and metho Ink cartridge system with improved volumetric capacity and metho

1993-09-07

1995-12-19

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

B41J 2175

Patent

active

054772559

ABSTRACT:
An ink cartridge having an improved ink-retaining capacity. The cartridge (preferably of the thermal inkjet type) includes a housing having a multi-cellular foam member therein. To increase the ink-retaining capacity of the foam member, one or more elongate bores are positioned entirely through the foam member. Each bore is preferably uniform in cross-sectional size and configuration along its entire length, and may encompass numerous cross-sectional configurations (e.g. circular or rectangular). The longitudinal axis of each bore is preferably perpendicular to the longitudinal axis of the foam member. When the foam member is supplied with ink, an additional portion of ink is retained within each bore. As a result, the ink-retaining capacity of the foam member is increased compared with foam members which lack any bores. The bores function as internal ink reservoirs from which ink may be drawn during cartridge operation.

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