Collapsible ink reservoir structure and printer ink cartridge

Incremental printing of symbolic information – Ink jet – Fluid or fluid source handling means

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B41J 2175

Patent

active

057678820

ABSTRACT:
A collapsible ink reservoir structure (25) to facilitate assembly of a replaceable or refillable printer ink cartridge is comprised of a relatively rigid frame (20) and flexible membranes (22, 24) forming an ink reservoir having side walls which collapse to a substantially flat shape to minimize the amount of ink remaining in the reservoir structure after computer generated printing has depleted the ink from the cartridge. The structure (25) is a separate unit which is assembled and mounted in an outer housing (10) to form an ink cartridge. The structure preferably contains an ink pressure regulator (30) which maintains a negative pressure therein.

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patent: 5450112 (1995-09-01), Scheffelin

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