Typewriting machines – Including interposed inking device for record-medium – Ribbon – per se
Patent
1986-01-16
1989-11-14
Hess, Bruce H.
Typewriting machines
Including interposed inking device for record-medium
Ribbon, per se
400120, 4002411, 427256, 428195, 428216, 428336, 428412, 428413, 428447, 4284744, 4284755, 4284782, 428480, 428484, 4284881, 4284884, 428500, 428524, 4285275, 428913, 428914, B41M 526
Patent
active
048803243
ABSTRACT:
A heat-sensitive transfer medium comprises 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.
REFERENCES:
patent: 1776141 (1930-09-01), Bibb
patent: 4229239 (1980-10-01), Arai
patent: 4322467 (1982-03-01), Heimbach
patent: 4407686 (1983-10-01), Cook
patent: 4592946 (1986-06-01), Shuman
patent: 4617227 (1986-10-01), Hotta et al.
patent: 4623580 (1986-11-01), Koshizuka
patent: 4651177 (1987-03-01), Morishita
IBM TDB vol. 30, No. 3 (1987) 1109.
Hasegawa Tetsuo
Kaneko Shuzo
Katayama Masato
Kushida Naoki
Sato Hiroshi
Canon Kabushiki Kaisha
Hess Bruce H.
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