Browse Prior Art Database

Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal


It is often desirable in xerography to present the development system with a "screened-t image. This publication discloses a device which permits efficient sequential screening of an image after exposure but prior to development. The device consists of a slotted rotating barrel through which light is projected. The method of using the device is more fully il-lustrated by Figures 1, 2 and 3 in which Figure 1 shows the location of the device in a typical xerographic machine. Figures 2 and 3 are end views of the device not exposing and exposing the drum, The advantage of this system is that it permits screening in a direction perpendicular to the movement of the surface of the photoreceptor. Screening parallel to the surface can be accomplished by a stationary screen or by incorporating the screen pattern into the barrel.