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:
Nov. 14, 1989
Filed:
Jan. 06, 1987
Hiroyuki Ueda, Kawasaki, JP;
Yasuaki Yamada, Matsudo, JP;
Toshiaki Ozawa, Chiba, JP;
Hiroharu Nakajima, Kodaira, JP;
Hiroatsu Kondo, Zushi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An improved ink ribbon cassette for a serial printing apparatus comprises a body, first and second substantially coextensive spaced ink ribbon guide arms projecting from the body, each having a free end, and an ink ribbon mounted in the body for advancement during printing and having a portion extending between the free ends of the guide arms so as to be available for printing. One of the guide arms has a window therein through which the ribbon is visible. A first optically detectable indicator is carried on the ribbon at a position to be visible through the window when the ribbon is substantially exhausted. A second optically detectable structure is mounted on the guide arm adjacent the window and laterally spaced therefrom in the direction of movement of the ribbon. This second optically detectable structure indicates the type of ribbon in the cassette.