XEROGRAPHIC MACHINE WITH DOUBLE SIMULTANEOUS IMAGING
Original Publication Date: 1981-Feb-28
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
The output of a xerographic copier is improved by simultaneously forming two images of an object on opposite sides of the photoreceptor drum. As in a single-image arrangement, one scanning lamp 20 illuminates a strip of the object 11. This illuminated strip is viewed by two mirrors 12, 13 mounted on a scanning carriage. The respective reflected rays are further reflected by mirrors 14, 15 mounted on carriages that are arranged to move in linked fashion at half the speed of the scanning carriage. These "half-rate" mirrors 14, 15 reflect the rays in opposite directions through the same lens 16 onto further mirror pairs 17, 18 and 19, 20, which direct the rays onto opposite sides of the photoreceptor drum 21. The mirror pairs 17, 18 and 19, 20 may be repositioned in linked fashion to achieve different reduction modes of copying. The photoreceptor drum is rotated through the usual development, transfer and cleaning stations 22, 23 and 24.