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:
May. 06, 1997
Filed:
Sep. 28, 1995
Akira Ezawa, Kanagawa-ken, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A film supply device that accurately stops the film in a short length of time at a predetermined position even when using increased film supply speed. A film supply device includes a motor and a transfer mechanism. The transfer mechanism has an input gear rotated by the motor and that transfers the input gear rotation to a winding shaft for the film. The film supply device further includes a revolution preventing mechanism and a planetary clutch mechanism having a sun gear and a planetary gear. The sun gear is rotated by the motor. The planetary gear revolves about the sun gear and is rotated by the sun gear. The planetary gear enmeshes with the input gear and revolves in a connected direction when the sun gear rotates in a first direction. The planetary gear is separate from the input gear and revolves in a release direction when the sun gear rotates in a second direction. The revolution preventing mechanism prevents revolution of the planetary gear in the release direction when the sun gear decelerates in a first direction and the input gear is driven by the planetary gear.