COMPACT COLOR COPIER
Original Publication Date: 1990-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
The figure shows a compact copier 2 which has a pivotable platen cover 4 incorporating a paper tray 6 holding a plurality of copy sheets. The various xerographic functions are described below during an operational cycle and with reference to the figure. An operator places an original document on platen 7, closes the platen cover and makes a color selection. The selection cams one of a plurality of developer rolls 8, 10 into a developing position adjacent to surface of photoreceptor belt 12. A right to left scan of the original document is accomplished by a scadcharge assembly 14. The assembly comprises a charging corotron 16 which applies a charge to the surface of belt 12 in advance of the belt exposure. The original is incrementally illuminated by an elongated lamp 18. Light reflected from the document is transmitted through a Selfoc (TM) lens 20 forming a latent image of the scanned areas on the belt surface. At the end of the scan excursion a complete latent image of the document has been formed on the belt surface. As the belt travels in the indicated direction, the latent image is developed by one of the developer rolls 8,lO. The developed image then moves into a transfer zone where a transfer corotron 21 is initially de-energized. A copy sheet 23 is fed, in time synchronism with the belt movement, from the tray by a paddle retard feeder 22 through paper feet slot 24 and into a registered position formed in the nip of registration rollers 26. The copy paper is then fed in a timed relationship so as to be brought into contact with the developed image in the transfer zone. Transfer corotron 22 is then energized to assist in the transfer. The sheet then enters a fusing area where capton sleeve 28, incorporating resistive elements, is heated by application of a current therethrough. The copy sheet is pressed between the sleeve and pressure fuser roller 30. The fused copy emerges from output slot 32 to be deposited into an output tray.