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. 25, 1992
Filed:
Jul. 08, 1991
Carl L Olson, Wayland, MA (US);
Harry R Parsons, Reading, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
During manufacture a film unit has one portion masked while it is exposed to light in a second portion to form a latent image of indicia on the mask. A pod of liquid developer is attached to the pre-exposed film unit and together they are mounted within a cassette. The cassete is inserted into a camera where the previously unexposed portion of the film unit is exposed to image bearing light while the pre-exposed portion of the film unit is masked from said light. The pod of developer liquid is passed through a pair of rollers to rupture the pod, spread the developer liquid between the layers of the film unit, and develop the two latent images as a single photograph.