Patent ID: 9090089
Filing Date: 2015-07-28
Classification: B41J

Abstract:
1. A thermal printer for printing to a print medium at a controlled print speed, comprising: a print head; a paper feed mechanism configured to convey the print medium past the print head at the controlled print speed; a print speed change acquisition unit configured to determine the print speed of the paper feed mechanism and a change in print speed; an evaluation unit, responsive to information from the print speed change acquisition unit, configured to determine if the determined change in print speed exceeds a predetermined threshold value; and a print speed control unit configured to control the print speed of the paper feed mechanism in response to information from the print speed change acquisition unit based upon speed control factors including at least one or more parameters selected from the group consisting of: a temperature of the print head, a printing pattern, an energizing voltage applied to the print head, a print data communication speed, and a time required for internal data processing, wherein the print speed control unit limits the change of the print speed to a predetermined speed for at least one predetermined time when the threshold value is exceeded.