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US 10,078,294 B2Granted
Contact control of print blanket to impression drum
AssigneeHP Indigo B.V.
InventorsVitaly Portnoy, Michel Assenheimer, Amiran Lavon, Amir Ofir
Life of this patent
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Abstract
In an example, a method of controlling voltage applied to a print blanket within a printing device includes printing a print job. During the printing, a null cycle trigger is received. In response to the trigger, contact between a print blanket and an impression drum is reduced.
Claims14
A method of controlling contact between a print blanket and an impression drum, comprising:
- printing a print job in a printing device that comprises a print blanket to receive an ink image from a photoreceptor in a first transfer, and to transfer the ink image onto print media supported on an impression drum in a second transfer;
- during the printing, positioning the impression drum in a print position to create a print width nip level contact between the print blanket and the impression drum, and receiving a null cycle trigger;
- and,
- in response to the trigger, repositioning the impression drum to a null position to reduce contact between the print blanket and the impression drum from the print width nip level contact to a null width level contact.
1 more element
A printing device comprising:
- a photoreceptor on an imaging cylinder, the photoreceptor for developing an ink image to a latent image;
- a print blanket to transfer the ink image from the photoreceptor onto print media on an impression (IMP) drum during printing;
- a drum displacer to displace the IMP drum;
- and
- a controller to receive a null cycle trigger, and in response to the trigger, to cause the drum displacer to move the IMP drum out of a print position in which there is a print width nip level contact between the print blanket and the impression drum, and into a null position in which there is a null width level contact between the print blanket and the impression drum.
2 more elements
A non-transitory machine-readable storage medium storing instructions that when executed by a processor of a printing device, cause the printing device to:
- during a print cycle of a printing process, in which a print blanket is to receive an ink image from a photoreceptor in a first transfer, and to transfer the ink image onto print media supported on an impression drum in a second transfer, detect an interrupt from a printing subsystem;
- in response to detecting the interrupt,
- reduce contact between a print blanket and an impression drum from a print level to a null level;
- and
- insert a first null cycle into the printing process following the print cycle;
- insert an additional null cycle following the first null cycle for each null cycle in which the detection of the interrupt persists;
- and
- maintain the reduced contact between the print blanket and the impression drum during each null cycle.
5 more elements
Dependencies are inferred from the claim text.