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US 4,627,711 AGranted
Machine shutdown control
AssigneeXerox Corporation
InventorSteven M. Schron
Life of this patent
Estimating the term…
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AssigneeXerox Corporation
InventorSteven M. Schron
Estimating the term…
The present invention is the controlled shutdown of the preregistration, fuser, dedicated duplex tray, and machine exit zones of the copy sheet handling system of a machine. In particular, a control data base includes a packet phase describing the origin and destination and all specific details of how each individual copy sheet is to move through the system, a tracker phase showing the current physical location of the sheet in the system, wherein both the lead edge and trail edge of each sheet is tracked and dynamically updated at each control point, and a fault phase showing the specific element that has the fault and which edge of the sheet is the fault, and also showing that a fault has been responded to by the system. At the detection of a malfunction or jam, the control evaluates the status of the sheets in the sheet handling system and makes determinations, for example, to hold sheets from entering into the boundary between the preregistraton, fuser, duplex tray, and machine exit zones, or drives a sheet at the boundary into the next zone.
In a printing machine having a plurality of operating components including a copy sheet path cooperating with one another to produce images on copy sheets, the copy sheet path being divided into a plurality of zones for movement of the copy sheets, each of the zones including an associated copy sheet drive, and a control including a processor and memory, the memory having a plurality of sections, each section maintaining status information relating to the location and travel of the copy sheets in the copy sheet path, including the source and destination of each of the copy sheets within the copy sheet path, the control monitoring the conveyance of copy sheets along the copy sheet path for the occurrence of malfunctions to determine either a cycle down or an immediate shutdown, the method of controlling of the shutdown of the machine upon the detection of a copy sheet malfunction comprising the steps of
In a xerographic printing machine having a plurality of operating components including a photoreceptor and a copy sheet path cooperating with one another to produce images on copy sheets, the copy sheet path being divided into a plurality of zones, and a control including a processor and memory, the memory having a plurality of sections, each section maintaining status information relating to the zone of location and travel of each of the copy sheets in the copy sheet path, the control monitoring the conveyance of copy sheets along the copy sheet path for the occurrence of malfunctions, the method of directing the shutdown of the machine upon the detection of a copy sheet malfunction comprising the steps of
In a xerographic printing machine having a plurality of operating components including a photoreceptor and a copy sheet path cooperating with one another to produce images on the copy sheets, the copy sheet path being divided into a plurality of zones including an associated copy sheet drive, and a control including a processor and memory, the memory having a plurality of sections, each section maintaining status information relating to the location and travel of the copy sheets in the copy sheet path, the control monitoring the conveyance of copy sheets along the copy sheet path for the occurrence of malfunctions, the method of controlling of the shutdown of the machine upon the detection of a copy sheet malfunction comprising the steps of
In a printing machine having a plurality of operating components including a copy sheet path cooperating with one another to produce images on the copy sheets, the copy sheet path being divided into a plurality of zones for movement of the copy sheets, each of the zones including an associated copy sheet drive, and a control including a processor and memory, the memory having a plurality of sections, each section maintaining status information relating to the location and travel of the copy sheets in the copy sheet path, the control monitoring the conveyance of copy sheets along the copy sheet path for the occurrence of malfunctions, the method of controlling of the shutdown of the machine upon the detection of a copy sheet malfunction comprising the steps of:
Dependencies are inferred from the claim text.