Photocopying – Projection printing and copying cameras – Copying both sides of original
Patent
1980-02-04
1982-03-02
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Copying both sides of original
235 92SB, 355 14CU, 364900, G03B 2732, G03B 2752, G06F 100
Patent
active
043176291
ABSTRACT:
Job recovery method and system for generating complete sets of copies and providing billing information with respect thereto. Job recovery is automatically effected after a jam occurs with respect to copy sheets by maintaining counts of sheets reaching the exit pocket and retained in the duplex tray for determining therefrom images lost due to the jam and responsive thereto generating replacement copies. Counts are also maintained for determining when copying of each set is complete and for billing purposes with the count for billing purposes reflecting only delivered copies with no additions being made for replacement copies generated due to lost images. For effecting job recovery due to jams occurring during imaging of duplex copies, replacement sheets are generated immediately after each jam to replace those sheets lost due to the jam by determining the number of pages to be printed, dividing this number by two, and subtracting therefrom the count of sheets in the duplex tray and in the exit pocket, with this determination being then used to control generation of first side images on sheets needed for replacement purposes with said sheets being then conveyed to the duplex tray so that the resulting duplex copy generation is complete when reaching the exit pocket.
REFERENCES:
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patent: 4130354 (1978-12-01), Steiner
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patent: 4206996 (1980-06-01), Clark et al.
Harris Robert E.
International Business Machines - Corporation
Wintercorn Richard A.
Wright Carl M.
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