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:
Jul. 20, 1982
Filed:
Aug. 21, 1980
Takayoshi Hanagata, Yokohama, JP;
Atsushi Noda, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Apparatus for controlling the pulse period of pulses applied to a pulse motor in a printer is disclosed. The pulse motor is accelerated by gradually reducing the pulse period of pulses applied to the pulse motor. After the detection of return of the printing head to a certain predetermined position, the speed of pulse motor is gradually decreased down by gradually extending the pulse period of pulses applied to the motor. At the start of returning movement of the printing head, the first pulse of pulses applied to the motor has a pulse period larger than that of self-start pulse of the motor. The pulse period of the subsequent pulses is gradually reduced. At the time of stopping the pulse motor, the pulse period of pulses applied to the motor is gradually extended to decrease the speed of the pulse motor. At the moment when the pulse period is extended to a value larger than the pulse period of self-start pulse of the motor, application of pulse to the pulse motor is stopped.