SERVO CONTROL OF COPY PAPER REGISTRATION

Publishing Venue

Xerox Disclosure Journal

Abstract

In Figure 1 of the drawing, a copier 3 is shown having a vacuum belt type feeder 5 for advancing documents 6 past the copier scanning aperture 7 where the document image is scanned. Lamps 4 serve to illuminate the moving document for this purpose. The image rays generated are transferred via an optical path 8 onto the surface of the photoreceptor drum 10 of copier 3. The usual xerographic processing stations, i.e., charge station 11, developer station 12, transfer station 14 and cleaning station 15 are disposed about the periphery of drum 10. At transfer station 14, the document image created and developed on the surface of drum 10 is transferred to a copy sheet 17 brought forward by belt type sheet feeder 18 from copy sheet supply tray 20.

(EROX DSCLOSURE JOURNAL

SERVO CONTROL OF COPY PAPER REGISTRATION
Thomas B. Michaels

Proposed Classification
U.S. Cl. 271/230 Int. C1. B65h 9/14

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Volume 7 Number 3 May/June 1982 135

SERVO CONTROL OF COPY PAPER REGISTRATION (Cont'd)

In Figure 1 of the drawing, a copier 3 is shown having a vacuum belt type feeder 5 for advancing documents 6 past the copier scanning aperture 7 where the document image is scanned. Lamps 4 serve to illuminate the moving document for this purpose. The image rays generated are transferred via an optical path 8 onto the surface of the photoreceptor drum 10 of copier 3. The usual xerographic processing stations, i.e., charge station 11, developer station 12, transfer station 14 and cleaning station 15 are disposed about the periphery of drum 10. At transfer station 14, the document image created and developed on the surface of drum 10 is transferred to a copy sheet 17 brought forward by belt type sheet feeder 18 from copy sheet supply tray 20.

To accommodate variations in the position of the documents 6 on document feed belt 5 while assuring accurate registration and alignment of the document image developed on drum 10 with the copy sheet 17 brought forward by sheet feeder 18, sheet registration gates 22 are disposed astride the path of movement of the copy sheet as the sheet approaches transfer station 14. To control the disposition of gates 22 and match the timing of the copy sheet arrival at transfer station 14 with that of the developed image on drum 10, a registration control 21 for operating registration gates 22 is herein proposed.

Referring to Figure 2, registration control 21 has a sensor 24 for sensi...