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:
Jul. 12, 1983
Filed:
Apr. 28, 1980
John D Plumadore, Westfield, MA (US);
Photon Chroma, Inc., Westfield, MA (US);
Abstract
Camera for making slide transparencies on electrophotographic film which is carried during processing on one-half of a foldable, planar slide frame. The apparatus includes a reversible drive roll which automatically injects and ejects the frame carrying film for imaging and developing along the processing path of the camera. A corona unit for charging the photoconductive layer of the film is energized during inward movement of the film into the camera. After imaging by a light source, a liquid toner is activated for developing the image during withdrawal of the film along the processing path. The toner head includes spaced doctor blades for removal from the film of excess toner. The camera includes a fan which generates positive air pressure along the processing path during withdrawal of the film. Sensors are provided for processing elements including controlling an electric circuit for sequential operation of the drive roll, corona charging unit, toner pump and fan.