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US 4,151,410 AGranted
Document processing, jam detecting apparatus and process
AssigneeBurroughs Corporation
InventorsAndrew H. McMillan, William B. Templeton
Life of this patent
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AssigneeBurroughs Corporation
InventorsAndrew H. McMillan, William B. Templeton
Estimating the term…
An apparatus and process for detecting document jams in a document processing apparatus by detecting the translucency of the documents. The disclosed apparatus includes a transport path for guiding documents and drive wheels for moving the documents along the transport path. An LED light source located on one side of the transport path illuminates at least a portion of the moving document as it passes along the transport path. A phototransistor light detector located on the other side of the transport path detects light from the LED that passes through translucent portions of the document. Electronics connected to the light detector indicate a document jam when the translucency of a document is generally unchanged for a period of time while the document is between the light source and light detector. The electronics includes circuitry for detecting the presence of a document, circuitry for detecting the absence of rapid changes in document translucency and circuitry for remembering the absence of such rapid changes in document translucency.
An apparatus for detecting a document jam in a system that moves documents, said documents having first and second broad, opposite surfaces;
A document processing apparatus that processes moving documents and indicates a document jam therein, comprising:
A process for moving documents and detecting when the documents jam, comprising:
Dependencies are inferred from the claim text.