Multispeed development system
AssigneeZerox Corporation
InventorJohn J. Kopko
Life of this patent
Estimating the term…
Abstract
An apparatus in which a developer roller transports developer material into contact with a photoconductive surface having either a continuous tone or a half-tone latent image recorded thereon. The speed of the developer roller is controlled so that it rotates at a higher speed when developing the continuous tone latent image than when developing the half-tone latent image. In this way, development is optimized for the continuous tone and half-tone latent images so as to produce high quality copies.
Claims12
An apparatus which develops continuous tone and half-tone latent images recorded on a flexible belt, including:
- means, positioned closely adjacent to the flexible belt defining a development zone therebetween, for transporting developer material into contact with the flexible belt in the development zone so as to develop the latent image recorded thereon;
- means for maintaining the flexible belt at a preselected tension of sufficient magnitude so that the developer material being transported into contact therewith deflects the flexible belt about said transporting means to form a wrapped development zone;
- and
- means for controlling the speed of said transporting means so that said transporting means moves at a higher speed when developing continuous tone latent images than when developing half-tone latent images.
An electrophotographic printing machine of the type having continuous tone and half-tone electrostatic latent images recorded on a flexible photoconductive belt, wherein the improvement includes:
- means, positioned closely adjacent to the photoconductive belt defining a development zone therebetween, for transporting developer material into contact with the photoconductive belt in the development zone so as to develop the latent image recorded thereon;
- means for maintaining the flexible photoconductive belt at a preselected tension of sufficient magnitude so that the developer material being transported into contact therewith deflects the flexible photoconductive belt about said transporting means to form a wrapped development zone;
- and
- means for controlling the speed of said transporting means so that said transporting means moves at a higher speed when developing continuous tone latent images than when developing half-tone latent images.
Dependencies are inferred from the claim text.