Abstract: Copy production machine, such as a xerographic copier, includes an original document feed mechanism which is responsive to insertion of the document to place the document automatically in an imaging position. The copy production machine is actuated by the document feed mechanism to produce one or more copies of the placed original document. An original document being entered into imaging position may be removed by an operator or by the automatic original document feed mechanism, whereby the copy production machine is inhibited from producing copies until the original document is either reinserted or another original document is inserted. Thereupon, copy production resumes in the normal manner.

Abstract: Copy production machine capable of having copies from plural independent copy runs in a copy sheet transport path at a given instant. Copy jam recovery is enhanced by maintaining separate counts of all individual images having copies simultaneously present in the copy sheet path. Apparatus and procedures are described for utilizing the counts for precisely recovering loss of copy sheets due to a jam or other stoppage condition. Control of a billing meter is also disclosed.

Abstract: A copy production machine operates either in a simplex mode (each copy has an image only on one side) or in a duplex mode (copies have images on both sides). In the duplex mode, an interim storage unit stores partially completed copies (only one side of the duplex copies have an image). A second copy run completes duplex copy production. During power on sequencing, circuits sense for an intermediate copy production state (also termed intermediate state or intermediate operating state) and automatically makes machine selections for a copy production mode in accordance with the sensed intermediate state. In one early embodiment the intermediate state was copies residing in the interim storage unit and the selected copy production mode was the production of side two in a duplex mode. An electronic nonvolatile memory may also store intermediate state indications for use during power on sequencing.

Abstract: A copy production machine, such as a transfer electrographic copier, picks copy sheets for receiving images during a transfer operation. On rare occasions a sheet may not be successfully picked. Instead of turning the machine off and requiring manual intervention for a restart, the machine automatically retrys to repick the sheet of paper a predetermined number of times. If during such retry the pick is successful, then the copy production resumes automatically; if not, the machine is turned off after the predetermined number of cycles. During each machine cycle having an unsuccessful pick, protective actions are taken to insure that toner does not contaminate the machine and certain other actions do not provide a fire hazard. All retries are logged for maintenance assistance.