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Browse Prior Art Database

Electrophotographic Copier

IP.com Disclosure Number: IPCOM000092981D
Original Publication Date: 1967-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Medley, HC: AUTHOR

Abstract

In the design of a desk-top electrophotographic copier, one of the most critical stations of the electrophotographic process, in achieving a compact size of the copier, is the exposure station.

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Electrophotographic Copier

In the design of a desk-top electrophotographic copier, one of the most critical stations of the electrophotographic process, in achieving a compact size of the copier, is the exposure station.

As shown, a compact desk-top electrophotographic copier can be achieved by employing a folded optical system. This system comprises a pair of exposure lamps 1 underneath glass exposure plate 2. Disposed between lamps 1 is a pair of mirrors 3 and 4 positioned one under the other and aligned about 45 degrees and 225 degrees, respectively, from plate 2.

Lens 5 is positioned essentially perpendicular to plate 2. Behind lens 5 is prism 6 which provides 1:1 magnification in a distance equal to twice the focal length of such lens. Lamps 1, mirrors 3 and 4, lens 5, and prism 6 are combined as a unit. The latter is movable back and forth beneath plate 2 and in synchronism with the belt. The remainder of the desk-top copier is conventional with charging unit 7, developing unit 8, transfer unit 9, and fuser unit 10.

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