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:
Mar. 20, 1979
Filed:
Oct. 11, 1977
Applicant:
Inventor:
Richard P Eddy, Gardena, CA (US);
Assignee:
Christie Electric Corp., Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H / ;
U.S. Cl.
CPC ...
226195 ; 226102 ; 352182 ;
Abstract
A film tensioning device for maintaining tension in the film in a film transport system such as a motion picture projector. A tension roller mounted between pressure rollers with the film running over the tension roller, with a spring urging the pressure rollers against the film to prevent slippage of the film on the tension roller. A curved spring carried within the tension roller and engageable with a stop providing sliding friction with the tension roller. The spring is readily removable for substitution of a different spring to provide a different magnitude of tension in the device.