Duplex printing
AssigneeHP Indigo B.V.
InventorsMoshe Koko Havive, Gilad Greenberg, Zvika Yogev, Arnon Elihav
Life of this patent
Estimating the term…
Abstract
A duplex printing system and method of configuring the same are described. In examples, an image, such as a test pattern, on one side of a print substrate is printed to be out of phase with an image, such as a test pattern, on the other side of the print substrate. This is achieved by adjusting a configuration of a print buffer that is located between first and second print engines of the duplex printing system. In particular examples, a length of a web within the print buffer is controlled such that the images are out of phase.
Claims15
A method of configuring a duplex printing system comprising:
- providing a print buffer between a first print engine and a second print engine of the duplex printing system, each print engine being synchronized with the other and arranged to print on a respective side of a web of print substrate;
- and
- adjusting a length of the web within the print buffer such that a color calibration test pattern printed on a first side of the web by the first print engine is out of phase with a color calibration test pattern printed on a second side of the web by the second print engine.
A duplex printing system comprising:
- a first print engine arranged to print on a first side of a web of print substrate;
- a first measurement station to measure color properties of an image printed on the first side of the web by the first print engine;
- a second print engine arranged to print on a second side of the web at the same time as the first print engine prints on the first side of the web;
- a second measurement station to measure color properties of a second image printed on the second side of the web by the second print engine;
- a print buffer located between the first and second print engines;
- and
- a print controller to adjust a length of the web held within the print buffer prior to printing the test images with the first and second print engines such the first image is out of phase with the second image.
A non-transitory machine-readable storage medium storing instructions that, when executed by a processor of a continuous web press, cause the processor to:
- configure a print buffer of the continuous web press, the print buffer being located between simplex and duplex print engines of the continuous web press;
- synchronize printing of respective print frames by the simplex and duplex print engines;
- advance the web through the continuous web press until the print frames are located at a set of sensors;
- and
- configure the continuous web press based on data received from the set of sensors,
- wherein the instructions cause the processor to configure the print buffer by setting a web length within the print buffer such that a web length between the simplex and duplex print engines is indivisible by a sum of a measurement travel distance and a length of the print frames, the measurement travel distance being a web travel distance between the set of sensors and each print engine.
Dependencies are inferred from the claim text.