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US 4,544,265 AGranted
Grooved vacuum belt document handling system
AssigneeXerox Corporation
InventorEdward A. Powers
Life of this patent
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AssigneeXerox Corporation
InventorEdward A. Powers
Estimating the term…
A document handling system in which an air permeable belt advances documents to an imaging station of a copying machine. The belt reflects light rays transmitted thereto except in grooved areas which have been rendered at least partially transmissive to light. These grooved areas contain vacuum apertures in the belt. Semi-circular air channels in the vacuum plenum in concert with the belt apertures provide a means to hold the document to the belt. Light rays transmitted through the partially transmissive grooved areas are reflected from the air channel to back-illuminate the aperture/groove area thereby reducing background shadows associated with these aperture areas. A vacuum system is in communication with the belt for retaining the documents thereon. The vacuum system is arranged to receive the light rays transmitted through the belt and diffusely reflect the light rays incident thereon back through the belt.
A document handling system of the type in which a document is transported to an imaging station of an electrophotographic printing machine comprising:
A document handling system of the type in which a document is transported to an imaging station of a reproduction machine comprising:
Dependencies are inferred from the claim text.