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. 26, 1988
Filed:
Oct. 20, 1986
Keiji Nagira, Kawasaki, JP;
Shoji Kanemura, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Method and apparatus for effecting thermal recording on a sheet of a recording medium with the aid of a reusable ribbon which can be repeatedly used for recording a plurality of times. The recording operation is performed during forward movement as well as during return movement of a thermal head while the ink ribbon is wound and unwound. On completion of a predetermined number of recording operations in both direction further recording is stopped and the thermal head is returned to its home position without any displacement of the ink ribbon. Thereafter, the above-mentioned steps are repeated. The reusable ribbon is wound by a length equal to M/N of a line every time recording is performed on M lines in the two-way recording mode, where N represents the number of recording operations for which a portion of the reusable ink ribbon can be repeatedly used. When a non-reusable ink ribbon is used, this fact is detected and the result of detection is discriminated by a CPU to effect unidirectional recording; when a reusable ink ribbon is used, this fact is detected to effect irregular two directional recording, and when no ink ribbon is used, this fact is detected to effect complete two directional recording.