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:
Feb. 26, 1985
Filed:
Apr. 21, 1983
Yasuhiko Matsuda, Hanamaki, JP;
Kabushiki Kaisha Sato, , JP;
Abstract
This invention provides a temperature control system for a thermal printer which prints by urging a printing plate with type formed thereon against a heat-transfer paper sheet. The system raises the temperature of the printing plate rapidly after power is turned on and then maintains the temperature of the printing plate essentially constant at the optimal temperature, so that clear printing may be performed at any time. In the initial heating period of the printing plate, a high voltage is applied to the printing plate to raise the temperature quickly. When a first sensor detects that the printing plate has reached a temperature close to the optimal printing temperature, the high voltage supply is interrupted. Thereafter, a second sensor and a control circuit connected thereto serve to produce a low voltage that is applied so as to maintain the printing plate at the optimal printing temperature. The magnitude of the low voltage is inversely proportional to printing plate temperature.