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:
Oct. 31, 1978
Filed:
Sep. 23, 1977
Thomas J Persha, Juneau, WI (US);
David Jagielski, West Bend, WI (US);
Bell & Howell Company, Chicago, IL (US);
Abstract
The inventive microfilm reader and reader-printer has a film gate which is anchored to the chassis of the reader or reader-printer and which is entirely separate from a light system, lens mount, and focusing system which float up and down with respect to the film gate and chassis. The floating system is mounted on an elevator mechanism which lifts or lowers it relative to the film gate to scan across the width of the film. A prism is included in the lens system to rotate and vertically align the projected image. A combination of the movements of the elevator mechanism and prism enables any vertical segment of the microfilm to be scanned, selected, and read in a vertical orientation.