Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means
Patent
1998-05-07
2000-08-01
Le, N.
Incremental printing of symbolic information
Ink jet
Fluid or fluid source handling means
B41J 2175
Patent
active
060956437
ABSTRACT:
A refillable cartridge for inkjet printing devices having an ink supply off-board the cartridge carrier is characterized in that it is filled with an ink supply prior to shipment and the refill opening through which replenishment ink is supplied during printing is left open during shipment and storage. The interior of the cartridge is partitioned into a free ink reservoir, a foam-filled ink reservoir and an air buffer region. The foam-filled ink reservoir is filled with a foam material saturated with ink prior to shipment. A portion of the foam material extends into the air buffer region and is left dry. As long as the refill opening is not closed, ambient pressure is applied to the ink supply in the cartridge via the refill opening and the air buffer region. An ink passage permits ink flow in either direction between the free ink reservoir and the foam-filled ink reservoir. Either reservoir may be connected to ink capillaries in a conventional heater chip. The capillaries provide a greater resistance to ink flow than the foam material so that changes in temperature and/or pressure merely change the level of ink in the foam material.
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Cook William Paul
Denton Gary Allen
Griffin, Jr. B. Franklin
Le N.
Lexmark International Inc.
Vo Anh T. N.
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