Automatic duplex document feeder

Sheet feeding or delivering – Delivering – With transfer means between conveyor and receiver

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Details

271236, 271245, 271251, 271 4, 271DIG9, 271 65, 271184, 355 14SH, B65H 906, B65H 916, B65H 2920

Patent

active

044770685

ABSTRACT:
A document feeder for automatically inverting a duplexed original so that the second side may be copied. The inverting mechanism is a turnaround roll located at the exit of the copy station. The inverting mechanism cooperates with rollers located above the document glass for moving documents thereacross. The rollers are inclined at an angle to the direction of paper movement in order to position paper against a side reference edge. When receiving a document from the turnaround roll and moving it in the reverse direction, the inclination of the rollers is removed or altered to a minus angle. Alternatively, a second set of rollers, inclined at a minus angle, are brought into active use when documents are moved in the reverse direction.

REFERENCES:
patent: 2888261 (1959-05-01), Barnes
patent: 3176980 (1965-04-01), Mitchell et al.
patent: 3666262 (1972-05-01), Fowler et al.
patent: 4052054 (1977-10-01), Cardwell et al.
patent: 4066252 (1978-01-01), Wick
patent: 4176945 (1979-12-01), Hochauser et al.
patent: 4285512 (1981-08-01), Shlatz
patent: 4300758 (1981-11-01), Peter
patent: 4335954 (1982-06-01), Phelps
patent: 4359219 (1982-11-01), Garavuso
IBM Tech. Disc. Bull. "Document Aligner System", Flavin, vol. 20, _No. 2, Jul. 1977.
IBM Tech. Disc. Bull. "Document Aligning Device . . . ", _Gutteling, vol. 16, No. 11, Apr. 1974.
IBM Technical Disclosure Bulletin, vol. 22, No. 11, Apr. 1980, "_Document Reverser/Handler for Duplex Copying", A. H. Ett, pp. _5140-5141.

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