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:
Oct. 17, 1995
Filed:
Sep. 28, 1993
Yukihisa Kato, Higashimurayama, JP;
Hidehiro Takano, Tokorozawa, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A serial printer for preventing the coil of a print head from being burned, by detecting the temperature of the print head to switch the printing mode of the print mode from a bidirectional mode to a split mode in accordance with the detected temperature. This serial printer comprises: a print head bidirectionally movable for printing line by line according to print data; temperature detecting means for detecting the temperature of the print head; print data density discriminating means for discriminating whether the print data of one line of the print data inputted have high density or low density; and print control means for switching the printing mode of the print head from a bidirectional printing mode to a split mode, in which one line is printed separately by at least two times, when it is determined that the print data of the one line is of high density and that the detected value of the temperature detecting means exceeds a predetermined value. The coil of the print head is prevented from being burned, without using any thermal conducting agent, so that a sufficiently high effective printing speed can be achieved.