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:
Jun. 02, 1981
Filed:
Aug. 03, 1979
Arnis E Peters, LaCrosse, WI (US);
Realist, Inc., Menomonee Falls, WI (US);
Abstract
There is disclosed herein apparatus for positioning rows and columns of microimage frames imprinted on a cassetted filmstrip for projection and display. The filmstrip is longitudinally movable in incremental amounts through an elongated cassette passageway, the passageway having a transverse aperture for permitting projected light to pass through a selected portion of the filmstrip for enlarged and focused microimage display. The positioning apparatus includes a first transparent plate located in the path of projected light but spaced to one side of and away from the plane defined by the filmstrip as it traverses the passageway, a second transparent plate located in the path of projected light but spaced on the opposite side of and away from the filmstrip traversing plane, and an assembly operable prior to filmstrip movement through the cassette passageway for effecting separation of the first and second plates, the assembly also operable after a selected portion of the filmstrip has been moved into and stopped in the path of projected light for clamping the selected film-strip portion between the first and second plates in a film-strip focusing plane.