The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 24, 1996
Filed:
Feb. 22, 1994
Applicant:
Inventors:
Kuniaki Yasunaga, Yokohama, JP;
Shigeru Ueno, Yokohama, JP;
Assignee:
Bridgestone Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 86 ; 524112 ;
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.