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:
Apr. 21, 1992
Filed:
Aug. 15, 1989
Hiroshi Sato, Hiratsuka, JP;
Kazumi Tanaka, Yokohama, JP;
Naoki Kushida, Yokohama, JP;
Masato Katayama, Yokohama, JP;
Yasuyuki Tamura, Yokohama, JP;
Tetsuo Hasegawa, Tokyo, JP;
Hisao Yaegashi, Yokohama, JP;
Shuzo Kaneko, Tokyo, JP;
Koichi Tohma, Kawasaki, JP;
Takayuki Suzuki, Saitama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A heat-sensitive transfer medium comprising a support and at least two heat-transferable ink layers including a first and a second ink layer. The first ink layer has relative adhesions with the second ink layer and the support which are reverse at a higher temperature from those at a lower temperature. When the heat-sensitive transfer medium is superposed with paper, a heat energy is applied, and the transfer medium is separated from the paper; the second ink layer is selectively transferred or both the first and second ink layers are transferred to the paper depending on the length of time from the heat application until the separation of the transfer medium, whereby two color images can be formed by a single transfer medium.