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:
Aug. 10, 1982
Filed:
Sep. 08, 1980
Robert M Rawlings, Brooklyn Park, MN (US);
Padco, Inc., Minneapolis, MN (US);
Abstract
A photographic film processor including a film dryer through which photographic film is transported under tension and dried, has a film break detection system for detecting photographic film breaks within the dryer. Upper and lower substantially horizontal shafts are positioned in the dryer in a spaced relationship. Each shaft has a plurality of spools, and the photographic film is transported back and forth over the spools and between the shafts in a serpentine fashion. The lower shaft is spatially movable with respect to the upper shaft and is biased in a direction opposite to the force on the lower shaft due to film tension. A film break within the dryer causes a loss of film tension, which in turn causes a change in the spatial position of the lower shaft. A sensor senses this change in the spatial position of the lower shaft, activates an alarm, and shuts off the dryer drive system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile