Xerox Corporation

Mark W Horobin

Ian Pitts

John Barry Poxon

Ernest B Williams

In a digital copier having an input scanner and a printer, image placement or magnification errors which relate to the input scanner can be corrected in copies made at the printer. A person feeds into the input scanner a special test pattern sheet. The copy of the test pattern may exhibit readily-detectable image defects, manifest as 'readings' which the user can communicate to the computer, such as through a user interface. A control system in the computer can take the readings and use them to correct attributes of prints made in subsequent copying operations.

Semi-automatic image registration control for a digital copier

When powering up a xerographic fusing apparatus with two parallel lamps, power is applied to each lamp in a stair-step fashion, in which incremental increases in applied power for each lamp are staggered in time. This feature contributes to desirable anti-flicker effects of the whole apparatus.

Method of operating a xerographic fusing apparatus with multiple heating elements

A tensioning system that precisely sets and monitors tension in a photoreceptor belt and includes a stepper motor that is actuated by a controller to apply pressure to the photoreceptor belt through a roll over which the belt is mounted. A load cell is positioned with respect to a piston actuator to sense the pressure applied by the piston actuator against the photoreceptor belt and signals the controller which in turn actuates the stepper motor to bring the tension on the belt to a predetermined set amount.

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Welwyn Garden, United Kingdom

Mark W Horobin