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. 28, 1991
Filed:
Dec. 29, 1989
Richard J Fraser, Franklin, MA (US);
Kenneth J Launie, Cambridge, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A instant camera of the type which receives film assemblages having stacked film units of the self-developing type. The camera is provided with a pair of spread rollers which engage an exposed film unit to spread a processing liquid between layers of the film unit while simultaneously moving it into a storage chamber having a viewing window. An opaque shade for the window is located adjacent the exit side of the spread rollers. The shade is adapted to be moved into covering relationship to the window and/or the exposed film unit for a predetermined period of time after it exits from the bite of a pair of spread rollers and then returned to its noncovering position. This time is sufficient to allow a treated portion of the film unit to remain in the dark unit its length reaches a predetermined value. At this length there will no longer be any danger of actinic light being piped along the length of the film unit until it reaches an untreated portion of the film unit that is still at the entrace side of the spread rollers.