Browse Prior Art Database

Overlapped Jobs in a Copier

IP.com Disclosure Number: IPCOM000052863D
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Brannan, RC: AUTHOR [+2]

Abstract

An operator may begin copying a new job without waiting for all copies of the previous original to appear in the copy bin.

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Overlapped Jobs in a Copier

An operator may begin copying a new job without waiting for all copies of the previous original to appear in the copy bin.

In U.S. Patent 4,003,569, a last-copy detector minimizes the time between successive multiple non-overlapped jobs. There, the copying of a new job begins as soon as the last copy of the previous job leaves the copier's paper path, thereby limiting the number of jobs in the path to one. Here, the time required to clear the paper path is eliminated by overlapping successive jobs.

For each job, originals are continuously placed on the document feeder to be fed under normal control. The logic updates the Quantity Select Register (QSREG) each time an original is fed; thus the number in the Quantity Select Register when the start command is given will be the number of copies made for that original. During job overlap, the operator makes the desired quantity selection for the next job as soon as the previous job's last original is fed, so that copying of the next job can begin immediately after the last sheet of the previous job is picked. Misfeed Registers (MRs) keep track of the number of copies in the path for each job. During jam recovery, the number of nonzero Misfeed Registers determines how many originals must be recopied. The number in each Misfeed Register is compared to its corresponding Quantity Select Register to determine how many copies of each original must be remade.

In the figure, QUAN=Quantity, MSG=Messa...