Patent ID: 6169558
Filing Date: 2001-01-02
Classification: B41J,G03G

Abstract:
A laser printing process using a rotary light sensitive roller electrically charged by points of a laser beam and intended for receiving particles of a toner powder onto the charged points and then transferring the particles onto a band to be printed, which comprises: a first step wherein the image to be printed is stored, by a first laser beam coming from a first laser source controlled by a computer, onto a rotary memory roller whose surface is covered with a layer of a convertible material assuming either an amorphous or a crystalline structure under the action of a laser beam, and said convertible material showing a high difference in reflecting ability according to whether it assumes the amorphous structure or the crystalline structure; and a second step wherein the thus stored image is transferred, by means of the optical reflection of a second laser beam coming from a second laser source having in its whole a linear character, onto the light sensitive roller intended to receive the toner and to transfer the image onto the band to be printed.