Ink placement adjustment
First Claim
Patent Images
1. An apparatus for printhead adjustment, comprising:
- an image scanning mechanism to provide positioning data about the position of drops of ink ejected onto media from nozzles of a number of stationary printheads; and
a controller to determine a Y axis offset of at least two ink drops based on the positioning data.
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Accused Products
Abstract
Systems, methods, and devices are provided for printhead adjustment. In one apparatus embodiment, the apparatus includes an image scanning mechanism and a controller. The image scanning mechanism can provide positioning data about the position of drops of ink ejected onto media from nozzles of a number of stationary printheads. The controller can determine a Y axis offset of at least two ink drops based on the positioning data.
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Citations
26 Claims
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1. An apparatus for printhead adjustment, comprising:
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an image scanning mechanism to provide positioning data about the position of drops of ink ejected onto media from nozzles of a number of stationary printheads; and
a controller to determine a Y axis offset of at least two ink drops based on the positioning data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An image forming system, comprising:
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at least two printheads each having a number of nozzles thereon, wherein the printheads are configured in a staggered, stationary array for forming an image on print media;
a scanning mechanism for scanning ink placement pattern information; and
a controller to determine X and Y axis offsets of at least two printheads based upon the ink placement pattern information. - View Dependent Claims (11, 12)
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13. An apparatus for printing, comprising:
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an image scanning mechanism to provide positioning data about positioning of a number of nozzles of at least two stationary, staggered printheads; and
means for determining X and Y axis offsets of the printheads based on the positioning data. - View Dependent Claims (14, 15, 16, 17)
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18. A method for ink pattern adjustment, comprising:
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identifying a position for two points on print media printed by a stationary, staggered printhead array;
defining two reference points based upon the position of the two points;
measuring a positional difference between the two reference points; and
adjusting printhead ink ejection according to the positional difference. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A computer readable medium having a set of executable instructions for causing a device to perform a method, comprising:
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identifying a position for two points on print media printed by a stationary, staggered printhead array;
defining two reference points based upon the position of the two points;
measuring a positional difference between the two reference points; and
adjusting printhead ink ejection according to the positional difference. - View Dependent Claims (25)
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26. A computer readable medium having a set of executable instructions for causing a device to perform a method, comprising:
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ejecting an ink drop from two or more nozzles in a nozzle column of at least two staggered, stationary printheads to print an ink placement pattern on a print media;
repeatedly ejecting ink from a nozzle while advancing the print media to print a reference line;
scanning an image of the ink placement pattern and the reference line;
calculating a rotational offset for the ink placement pattern relative to the reference line; and
adjusting nozzle ink ejection timing based on the rotational offset relative to the reference line.
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Specification