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:
Jun. 25, 1996
Filed:
Feb. 23, 1995
Shinya Takahashi, Kodaira, JP;
Nobuyuki Tanaka, Hidaka, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A motor drive circuit drives a motor to feed a film. A photoreflector detects a perforation formed in the film. A photointerrupter detects a drive amount of the film. A memory detects a 1-frame drive amount of the film on the basis of an output from the photoreflector and an output from a photointerrupter to store the 1-frame drive amount. A CPU reduces a feeding speed of the film on the basis of the 1-frame drive amount stored in the memory and the drive amount detected by the photointerrupter before the 1-frame winding operation is ended. The film having a minimum number of perforations can be accurately stopped at a photographic frame position, and a film end can be detected at high accuracy.