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:
Sep. 06, 1983
Filed:
Jun. 30, 1981
Applicant:
Inventors:
Nobuo Tezuka, Tokyo, JP;
Tatsuya Taguchi, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; B65H / ;
U.S. Cl.
CPC ...
242 71 ; 242 718 ; 242 711 ;
Abstract
A film takeup spool provided with pawls in the interior of a sleeve hub thereof at such a location that pivot pins of the pawls are off-set from the axis of rotation of the sleeve hub. The pawls are urged by respective springs to project their teeth radially outwardly of the sleeve hub into the perforations of the film. When the spool is driven to rotate with a sufficient tension of the film, the pawl teeth are retracted into the sleeve hub, thus permitting a smooth winding up of the film on the sleeve hub of the takeup spool.