Reducing print quality defects
AssigneeHewlett-Packard Development Company, L.P.
InventorsMatthew G. Lopez, Roya S. Akhanvalin, James M. Pingel, David F. Chiu
Life of this patent
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Abstract
Reducing print quality defects can include printing a pattern with an offset printing device having a binary ink developer roller, determining a variation for a hue shift of the printed pattern; and varying gain in a feedback loop of a servo motor coupled to the binary ink developer roller to reduce the variation.
Claims15
A method for reducing print quality defects comprising:
- printing a pattern with an offset printing device having a binary ink developer roller;
- determining a variation for a hue shift of the printed pattern;
- and
- varying gain in a feedback loop of a servo motor coupled to the binary ink developer roller to reduce the variation.
A non-transitory computer-readable medium storing a set of instructions executable by a processor to cause a computer to
- print a pattern with an offset printing device having a binary ink developer roller;
- determine a standard deviation for a density shift of the printed pattern;
- and
- vary gain in a feedback loop of a servo motor coupled to the binary ink developer roller to reduce the standard deviation.
A system for reducing print quality defects, the system comprising a processing resource in communication with a memory resource, wherein the memory resource includes a set of instructions and wherein the processing resource is designed to carry out the set of instructions to:
- print a pattern with an offset printing device having a plurality of binary ink developer rollers;
- determine a standard deviation for a hue shift of the printed pattern;
- determine a standard deviation for a density shift of the printed pattern;
- vary gain in a feedback loop of a servo motor coupled to a first of the plurality of binary ink developer rollers to reduce the standard deviation for the hue shift;
- and
- vary gain in a feedback loop of a servo motor coupled to a second of the plurality of binary ink developer rollers to reduce the standard deviation for the density shift.
Dependencies are inferred from the claim text.