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. 14, 2008
Filed:
Jul. 24, 2006
Akira Koyabu, Shiojiri, JP;
Satoshi Nakajima, Azumino, JP;
Yuji Takiguchi, Shiojiri, JP;
Seiko Epson Corporation, , JP;
Abstract
A thermal printerand control method for controlling print speed to prevent variation in printing pitch due to frequent slight changes in the print speed following a significant change in print speed. The print speed, which is the speed at which the print medium i.e., paper is conveyed when printing, is controlled based on known print speed control factors. The thermal printer comprises a paper feed mechanism for conveying the print medium at a controlled print speed passed a thermal print head, a print speed control unitfor controlling the print speed of the paper feed mechanism based on the print speed control factors, a print speed change acquisition unitfor determining the change in the print speed over a predetermined time, and a comparison unitfor determining if the change in print speed exceeds a predetermined threshold value. The print speed control unitlimits change in the print speed based on the print speed control factors for a predetermined time after the comparison unitdetermines that the change in print speed exceeds the threshold value.