Foam insertion for an ink jet print head cartridge

Details Foam insertion for an ink jet print head cartridge Foam insertion for an ink jet print head cartridge

1993-12-10

1995-03-21

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

29451, B41J 2175

Patent

active

054000670

ABSTRACT:
A method and apparatus for inserting a compressed foam block into a generally rectangular ink jet print head ink chamber. The foam is compressed in an insertion tool which includes a compression area and compression fingers extending therefrom. A block of foam is placed in the principal area of the insertion tool and compressed in two dimensions, following which the ink jet print head is positioned around the compression fingers. The foam is pushed from the principal part of the insertion tool into the area surrounded by the compression fingers inside the print head ink chamber, and the force applied to the foam is continued. At a certain force level, the cartridge is allowed to move, under the force applied to the foam, off of the insertion fingers, leaving the foam inside the cartridge.

REFERENCES:
patent: 5025271 (1991-06-01), Baker et al.
patent: 5182579 (1993-01-01), Haruta et al.
patent: 5319841 (1994-06-01), Yata et al.
Hewlett-Packard Journal, Aug. 1988, article entitled "Ink Retention in a Color Thermal Inkjet Pen" by E. Erturk, B. D. Gragg, M. E. Haviland, W. W. Rhods, J. L. Ruder, and J. E. Scheffelin, pp. 41-43.

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