Means for self-positioning platen covers

Details Means for self-positioning platen covers Means for self-positioning platen covers

1977-01-03

1978-06-27

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Detailed holder for original

220264, 220335, 355 25, G03B 2762

Patent

active

040971457

ABSTRACT:
Self-positioning apparatus for a platen covering device is provided for a copier of the type which includes a platen, instrumentalities for flash illuminating a document placed by an operator on the platen, and a platen covering device such as a document feeder or a flat, opaque sheet of material or the like. The apparatus includes a linkage assembly for movably supporting the platen covering device; a manually releasable latch for holding the covering device at a predetermined position for holding respective documents of minimal thickness in contact with the platen; and resilient means including at least one torsion bar for urging the covering device away from said predetermined position, when said latch is released, for holding respective documents of greater thickness in contact with said platen.

REFERENCES:
patent: 3642371 (1972-02-01), Jones et al.
patent: 3994582 (1976-11-01), Goshima et al.
patent: 3997265 (1976-12-01), Menon et al.
patent: 4033694 (1977-07-01), Ferrari

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