Photocopying – Projection printing and copying cameras – Original moves continuously
Patent
1978-07-24
1979-12-18
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Original moves continuously
271 4, 355 3SH, 355 14SH, G03B 2748, G03B 2750, G03G 1500, B65H 522
Patent
active
041792157
ABSTRACT:
A recirculating document feeder feeds document sheets to an exposure station wherein the sheets can be exposed for copying. The feeder includes a support which receives and holds one or a plurality of document sheets. A vacuum feeder sequentially removes sheets from the bottom of the stack in the support. A vacuum belt sheet transport picks up the sheets removed from the support and circulates the sheets from the support to the exposure station and then away from the exposure station. The transport is of a size to simultaneously circulate a plurality of document sheets. At the appropriate time in the machine cycle a separator removes the sheet from the sheet transport and directs the removed sheet back to the support and on to the top of any other document sheets in the support. A feeding control is provided for selectively operating the feeder in any one of several modes of operation depending on the relationship between the number of document sheets in the support and the number of sheets that can be transported at one time by the transport. More specifically, the document sheets can be removed seriatim from the stack in the support, circulated once to the exposure station and then returned to the support on top of the other document sheets. Alternatively, the sheets can be removed seriatim from the bottom of the stack in the support, retained on the transport while they are circulated to the exposure station once or a plurality of times in order to make the total number of copies required, and then the sheets are returned to the stack in the original order. In another mode of operation a single sheet can be removed from the support, transported to the exposure station for copying one or more times and returned to the support.
REFERENCES:
patent: Re27976 (1974-04-01), Sahley
patent: Re29178 (1977-04-01), Colwill
patent: 3556511 (1971-01-01), Howard et al.
patent: 3563532 (1971-02-01), Street
patent: 3684367 (1972-08-01), Vassitch
patent: 3747918 (1973-07-01), Margulis et al.
patent: 3914047 (1975-10-01), Hunt, Jr. et al.
patent: 4076408 (1978-02-01), Reid et al.
patent: 4078787 (1978-03-01), Burlew et al.
patent: 4140387 (1979-02-01), Gustafson
Research Disclosure, Industrial Opportunities, Ltd., Homewell, Hauant, Hampshire, P091EF, United Kingdom, pp. 47, 48.
Childress G. Herman
Eastman Kodak Company
Wintercorn Richard A.
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