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:
Jan. 26, 1993
Filed:
Jul. 10, 1991
Masahiro Haruta, Tokyo, JP;
Masami Ikeda, Tokyo, JP;
Seiichiro Karita, Yokohama, JP;
Nobuyuki Kuwabara, Tokyo, JP;
Takahisa Kawamura, Yokohama, JP;
Masahiko Higuma, Togane, JP;
Teruo Arashima, Kawasaki, JP;
Tsutomu Abe, Isehara, JP;
Osamu Nishiwaki, Atsugi, JP;
Shinichi Tochihara, Hadano, JP;
Akira Nagashima, Tokyo, JP;
Makoto Aoki, Yokohama, JP;
Kumiko Mafune, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink tank having an ink storing portion encases an ink-absorbent member for holding ink. The ink-absorbent member comprises a porous material having therein compressed open cells. The compression ratio r.sub.1 of an apparent volume V.sub.1 before compression to an apparent volume V.sub.2 after compression (r.sub.1 =V.sub.1 /V.sub.2) and the cell number p represented by number of cells per inch in the state of V.sub.1 satisfy the relation (I) below, and p being not more than 60.