Optics: image projectors – Slide transfer mechanism
Patent
1990-12-21
1992-12-15
Cuchlinski, Jr., William A.
Optics: image projectors
Slide transfer mechanism
353 25, 353DIG1, 353DIG5, G03B 2302
Patent
active
051721457
ABSTRACT:
A transparency changer attachment for an overhead projector includes hinged horizontal and vertical portions that are located over the projector cover glass and down the projector side, respectively. Transparencies are automatically sequentially fed by pick and retard rollers from a single cassette-loaded transparency stack in the vertical portion to belts and rollers located marginally of a viewing area defined in the horizontal portion, to bring them into registration with the cover glass for projection, and then return them to the single stack. A microprocessor circuit controls the stack side from which the next transparency is picked and to which it is returned, according to selection made by the user. The cassette is keyed to assure correct transparency orientation at loading. A sensor reads individual transparency identifying information to initiate rapid cycling to a particular next desired transparency.
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Hoppmann Corporation Selectagraph Automatic Overhead Transparency Changer Sales Literature, Rev. 6 85 (3 pages).
Bergen Expo Systems, Inc., Auto-Graph Arc Overhead Projector with Automatic Transparency Changer/Model No. AGOH-2 Sales Literature (1 page).
Cuchlinski Jr. William A.
Dowling William C.
Eastman Kodak Company
Twait Marianne J.
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