PRECOLLATION DOCUMENT HANDLERS
Original Publication Date: 1982-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
As shown in the drawing, the document handler recirculates either simplex or duplex original document sheets for precollation copying in an electrophotographic printing machine. A stack of simplex originals is placed face down in document tray 10. Document feeder 14 advances the bottommost document from tray 10, in the direction of arrow 34, under stop 12, onto copier platen 16. A moving optical system directs light rays, as indicated by arrow 18, onto the document positioned on platen 16. Light rays reflected from the document are directed through a lens to form a light image thereof which irradiates the charged region of a photo-conductive surface to form an electrostatic latent image thereon. A document feeder (not shown) advances the simplex original from platen 16 and into the nip defined by rollers 28 and 30. Roller 28 rotates in the direction of arrow 36 to advance the simplex original into U-shaped member 26. When duplex originals are in tray 10, the document advances from copier platen 16 onto document drum 20 so that the other side thereof may be reproduced. The optical system directs light rays, as indicated by arrow 24, onto the other side of the document. The light rays reflected from the document are once transmitted through a lens onto the charged photoconductive surface to form a latent image thereon. After being illuminated, the leading edge of the document is released from drum 20 and enters the nip defined by rollers 28 and 30. The duplex document now follows the same path as hereinbefore described with regard to simplex documents.