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Title: Microfiche reader
Abstract:
A reader in which mircofiche film is manually moved in a rectilinear fashion by moving the film with respect to a holder in the first direction and moving the holder in a perpendicular second direction. The holder includes a light passage slot. A light source is mounted beneath the holder and an image projecting and enlarging optic is mounted in alignment with the source above the holder. A low friction annular spacer such as a Teflon O-ring rests directly on the film, is concentric with the optic and accurately spaces the optic from the film while maintaining film beneath the optics taut to assure proper image focusing. Film indexing is performed by moving the film while the optic supporting Teflon O-ring remains in contact with the film.
Other info: Inventors: Kool, Bram (Saratoga, CA, US) Application Number: 504420 Filing Date: 1974-09-09 Publication_date: 1976-03-09 Assignee: Microform Data Systems, Inc. (Mountain View, CA) Primary Class(es): 353/27R Other Classes: US Patent Ref:
Other Refs:
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