Ink retainer

Details Ink retainer Ink retainer

1994-02-22

1996-12-24

Lund, Valerie A.

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

524112, B41J 2175

Patent

active

055877311

ABSTRACT:
An ink retainer is comprised of a flexible polyurethane foam which is prepared by reacting a polyether polyol with a polyisocyanate. The polyol includes at least 20% by weight based on the total weight of the polyol of a polymeric polyol having styrene and/or acrylonitrile grafted thereto. The foam contains at least 20 cells/inch. The foam is inserted in a container at a compression ratio by volume of 1/2 to 1/10 when the cell number is 20 to 50 cells/inch and 1/1 to 1/5 when the cell number is more than 50 cells/inch. The foam is resistant against attack from ink and ensures stable constant supply of ink.

REFERENCES:
patent: 4771295 (1988-09-01), Baker et al.
patent: 5182579 (1993-06-01), Haruta et al.
patent: 5358984 (1994-10-01), Hayes et al.

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