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. 02, 1984
Filed:
Jul. 28, 1982
Kazuo Shiozawa, Hachioji, JP;
Seiichi Isoguchi, Hachioji, JP;
Konishiroku Photo Industry Co., Ltd., Tokyo, JP;
Abstract
An automatic film winding mechanism and method generates a series of pulses for each unit movement amount of the film, computes the speed of the film advancing movement, compares the speed to a stored look-up table for determining the precise point at which power to the film drive motor should be shut off, in order to have the advancement of the film come to a complete stop at a predetermined film transport distance. The invention thereby allows the film to be advanced to the exact transport distance regardless of the output and voltage fluctuation of the film drive power source, or of the film variation or load variation of the motor caused by a change in ambient temperature or other conditions.