Adjustable print size control for raster output scanners

Adjustable image print magnification system for a printer of the type using a raster output scanner having a rotating scanning polygon, a pixel clock providing clock signals for clocking pixels from an image signal source to the scanner, a polygon clock for controlling the rotating speed of the poly...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PARISI, MICHAEL A
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CALCULATING CINEMATOGRAPHY COMPUTING CORRECTION OF TYPOGRAPHICAL ERRORS COUNTING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY HANDLING RECORD CARRIERS HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES MAGNETOGRAPHY PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRESENTATION OF DATA PRINTING RECOGNITION OF DATA RECORD CARRIERS SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	Adjustable image print magnification system for a printer of the type using a raster output scanner having a rotating scanning polygon, a pixel clock providing clock signals for clocking pixels from an image signal source to the scanner, a polygon clock for controlling the rotating speed of the polygon, a first cycle stealing circuit for reducing the scanner pixel and polygon clocks together to control image length, and a second cycle stealing circuit for reducing the pixel clock only to control image width.