Method and apparatus for printing various sheet sizes within a pitch mode in a digital printing system
AssigneeXerox Corporation
InventorsDavid Mark Kerxhalli, David Robert Kretschmann
Life of this patent
Estimating the term…
Abstract
A method of controlling the inverter dwell time of the first print engine in order to print any sheet size within a pitch mode without the need for a belt sync dead-cycle. The method uses a small nominal inverter dwell time based on the maximum sheet size for a given pitch mode. For any sheet size within the pitch mode that is smaller than the maximum sheet size, the inverter dwell time will increase proportionally.
Claims18
A method of controlling image to print media sheet registration in a tandem digital printing system, the method comprising:
- receiving a plurality of parameters for a print job;
- cycling up a first print engine and a second print engine, wherein the first print engine includes at least a first seamed photoreceptor belt and an output inverter and the second print engine includes at least a second seamed photoreceptor belt;
- calculating a seam offset for the first and second photoreceptor belts;
- adjusting the speed of the first and second photoreceptor belts based on the seam offset;
- starting the print job;
- and
- adjusting a dwell time of the output inverter on a sheet by sheet basis.
A tandem digital printing system comprising:
- a first print engine having a first seamed photoreceptor belt and an output inverter;
- a second print engine having a first seamed photoreceptor belt;
- and
- a master controller operatively connected to the first and second print engines and the first inverter, wherein the master controller is operative to:
- receiving a plurality of parameters for a print job;
- cycling up a first print engine and a second print engine, wherein the first print engine includes at least a first seamed photoreceptor belt and an output inverter and the second print engine includes at least a second seamed photoreceptor belt;
- calculating a seam offset for the first and second photoreceptor belts;
- adjusting the speed of the first and second photoreceptor belts based on the seam offset;
- starting the print job;
- and
- adjusting a dwell time of the output inverter on a sheet by sheet basis.
A computer program product comprising:
- a computer-usable data carrier storing instructions that, when executed by a computer, cause the computer to perform a method comprising:
- receiving a plurality of parameters for a print job;
- cycling up a first print engine and a second print engine, wherein the first print engine includes at least a first seamed photoreceptor belt and an output inverter and the second print engine includes at least a second seamed photoreceptor belt;
- calculating a seam offset for the first and second photoreceptor belts;
- adjusting the speed of the first and second photoreceptor belts based on the seam offset;
- starting the print job;
- and
- adjusting a dwell time of the output inverter on a sheet by sheet basis.
Dependencies are inferred from the claim text.