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CAP FOR DISPOSABLE INK JET PRINTHEAD CARTRIDGE

IP.com Disclosure Number: IPCOM000025657D
Original Publication Date: 1987-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 117K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disposable printhead cartridges for carriage-type ink jet printers generally comprise a hermetically sealed cartridge containing a quantity of ink under a predetermined pressure and a thermally activated, drop-on-demand printhead integrally bonded thereto. The printhead has a plurality of nozzles connected to a cornmon manifold via capillary fillable ink channels. The manifold is sealingly interconnected to the ink in the cartridge. Such printhead cartridges are removably mounted on a carriage in the printer which is translatable. The carriage traverses back and forth along guide rails during the printing operation. A recording medium is held stationary during the printing of a swath of information by the translating printhead cartridge and is then stepped the distance of the printed swath height at the end of each carriage traversal.

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XEROX DISCLOSURE JOURNAL

CAP FOR DISPOSABLE INK JET PRINTHEAD CARTRIDGE U.S. C1.346/140R Ivan Rezanka
George Hempel
W. Conrad Richards

Proposed Classification

Int. C1. Gold 15/16

?r 29

Disposable printhead cartridges for carriage-type ink jet printers generally comprise a hermetically sealed cartridge containing a quantity of ink under a predetermined pressure and a thermally activated, drop-on-demand printhead integrally bonded thereto. The printhead has a plurality of nozzles connected to a cornmon manifold via capillary fillable ink channels. The manifold is sealingly interconnected to the ink in the cartridge. Such printhead cartridges are removably mounted on a carriage in the printer which is translatable. The carriage traverses back and forth along guide rails during the printing operation. A recording medium is held stationary during the printing of a swath of information by the translating printhead cartridge and is then stepped the distance of the printed swath height at the end of each carriage traversal.

The disposable printhead cartridge for the carriage ink jet printer can fail by the ink drying in the nozzles, by ink spilling out of the nozzles, or by loss of prime during shipment or handling. All of these failures may be prevented by a removable cap 12 attached to the cartridge 10 as shown in the accompanying

Volume 12 Number 1 January/February 1987 19

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CAP FOR DISPOSABLE INK JET PRINTHEAD CARTRIDGE (Cont'd)

figure, which shows a side view of the printhead cartridge 10, cap 12, and cap removal means 20.

The cap 12 is tightly snapped on the cartridge 10 and over the printhead 16 so that it hermetically seals the ink jet nozzles and the venting hole (neither shown) by seal 14. Spring-like extensions 13 of the cap grasp and hold the cap on the cartridge by mating recesses 11...