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. 01, 1978
Filed:
Apr. 15, 1977
Harvey S Friedman, Natick, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
In a photographic processing apparatus of the type including a pair of juxtaposed pressure applying members between which a self-processable type film unit is advanced to apply a pressure to the film unit to spread a viscous processing fluid in a thin layer between a pair of sheet elements of the film unit, a bimetallic strip is provided to sense ambient temperature and in response thereto apply a second pressure to the film unit as it is advanced between the pressure applying members to compensate for temperature induced changes in the fluid's viscosity which cause variations in the thickness of the processing fluid layer such that the bimetallic strip operates to maintain the thickness of the processing fluid layer substantially constant over a predetermined temperature operating range of the apparatus.