Restraining element for a print cartridge body to reduce thermal

Details Restraining element for a print cartridge body to reduce thermal Restraining element for a print cartridge body to reduce thermal

1993-10-05

1996-07-16

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Controller

347 63, B41J 205

Patent

active

055371337

ABSTRACT:
In one embodiment, a metal restraining element is used to reduce thermal expansion/contraction stress between a nozzle member and a print cartridge body. In a preferred embodiment, a nozzle member containing an array of orifices has a substrate, having heater elements formed thereon, affixed to a back surface of the nozzle member. The back surface of the nozzle member extends beyond the outer edges of the substrate. Ink is supplied from an ink reservoir within a print cartridge body to the orifices by a fluid channel within a barrier layer between the nozzle member and the substrate. The nozzle member is adhesively sealed with respect to the print cartridge body by forming an ink seal circumscribing the substrate, between the back surface of the nozzle member and the body. A metal restraining element, in the form of bolts or an insert, is affixed to the print cartridge body in the vicinity of the nozzle member to limit the thermal expansion of the body in a first direction when the print cartridge is heated during manufacturing or storage. This prevents delamination of the nozzle member from the barrier layer when the body and nozzle member cool after being heated.

REFERENCES:
patent: 4994825 (1991-02-01), Saito et al.
patent: 5016024 (1991-05-01), Lam et al.
patent: 5113204 (1992-05-01), Miyazawa et al.
patent: 5235347 (1993-08-01), Lee
patent: 5305018 (1994-04-01), Schantz et al.

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