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:
Jul. 29, 1997
Filed:
May. 12, 1994
Jun Kawai, Tokyo, JP;
Yohei Sato, Yokohama, JP;
Yoichi Taneya, Yokohama, JP;
Hiroshi Sugitani, Machida, JP;
Tokuya Ohta, Yokohama, JP;
Kazuaki Masuda, Kawasaki, JP;
Hiroyuki Ishinaga, Tokyo, JP;
Torachika Osada, Yamato, JP;
Masahiko Higuma, Togane, JP;
Takashi Saito, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink absorbing member is inserted in an ink tank housing which at least partly has a transparent portion. Used as this ink absorbing member is one having a reflection density after ink removal which is close to the reflection density of a melamine foam before ink injection. The amount of ink remaining in a cartridge of such a construction can be detected, for example, by a separate line sensor. The results of detection by the line sensor can be displayed by a remaining ink amount indicator provided on a control panel of the printing apparatus.