Document conveyance apparatus with retractable auxiliary conveya

Details Document conveyance apparatus with retractable auxiliary conveya Document conveyance apparatus with retractable auxiliary conveya

1989-10-24

1991-03-19

Grimley, A. T.

Photocopying

Contact printing

Light boxes

271227, 271233, G03G 2100

Patent

active

050015206

ABSTRACT:
A document conveyer for conveying a document to a predetermined position on platen glass of a copying machine, including; a document feeder for feeding the document from the outside of the document conveyer to a conveyance roller, located on the platen glass the conveyance roller, for conveying the document onto the platen glass by rotating in the forward direction, and also for subsequently bringing the trailing edge of the document into contact with an edge setting member, located adjacent to the platen glass, by rotating in the reverse direction so that the document is set at the predetermined position on the platen glass, an auxiliary conveyance roller, located on the platen glass, for conveying the document onto the platen glass by functioning with the conveyance roller when the document is longer than a predetermined size, and a roller retractor for retracting the auxiliary conveyance roller from the platen glass so that the auxiliary conveyance roller does not convey the document, in which the auxiliary conveyance roller is retracted from the platen glass by the roller retractor while the document is being brought into contract with the setting edge member by the conveyance roller.

REFERENCES:
patent: 4110038 (1978-08-01), Irvine et al.
patent: 4285512 (1981-08-01), Shlatz
patent: 4428667 (1984-01-01), Phelps et al.
patent: 4607835 (1986-08-01), Wilson et al.
patent: 4739983 (1988-04-01), Ide et al.

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