SYSTEMS AND METHODS FOR AUTOMATIC PRINT ALIGNMENT
First Claim
1. A method for print alignment by a continuous feed printer, comprising:
- detecting, by a sensor of a printer separated from a print head of the printer by a distance in the direction of travel of the printing medium, a first line of a pattern on a non-printing side of a printing medium, the pattern comprising two non-parallel lines separated by a predetermined distance at a predetermined position of the printing medium;
advancing, by the printer, the printing medium a first distance;
detecting, by the sensor, a second line of the pattern;
identifying, by the printer, a horizontal offset of the printing medium from an expected location of the predetermined position, proportional to the difference between the first distance and the predetermined distance; and
adjusting the identified horizontal offset by a correction factor proportional to the distance.
1 Assignment
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Accused Products
Abstract
The present application is directed to systems and methods for print alignment by a continuous feed printer. A sensor of a printer detects a first line of a pattern on a non-printing side of a printing medium, the pattern comprising two non-parallel lines separated by a predetermined distance at a predetermined position of the printing medium. The printer advances the printing medium a first distance, and the sensor detects a second line of the pattern. The printer identifies a horizontal offset of the printing medium from an expected location of the predetermined position proportional to the difference between the first distance and the predetermined distance.
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Citations
22 Claims
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1. A method for print alignment by a continuous feed printer, comprising:
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detecting, by a sensor of a printer separated from a print head of the printer by a distance in the direction of travel of the printing medium, a first line of a pattern on a non-printing side of a printing medium, the pattern comprising two non-parallel lines separated by a predetermined distance at a predetermined position of the printing medium; advancing, by the printer, the printing medium a first distance; detecting, by the sensor, a second line of the pattern; identifying, by the printer, a horizontal offset of the printing medium from an expected location of the predetermined position, proportional to the difference between the first distance and the predetermined distance; and adjusting the identified horizontal offset by a correction factor proportional to the distance. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11)
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3. (canceled)
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12. A system for print alignment by a continuous feed printer, comprising:
a continuous feed printer comprising; a sensor placed to detect a pattern on a non-printing side of the printing medium, the pattern comprising two non-parallel lines separated by a predetermined distance at a predetermined position of the printing medium; a print head separated from the sensor by a distance in the direction of travel of the printing medium; and a print engine configured for; detecting, via the sensor, a first line of the pattern, advancing the printing medium a first distance, detecting, via the sensor, a second line of the pattern, identifying a horizontal offset of the printing medium from an expected location of the predetermined position, proportional to the difference between the first distance and the predetermined distance, and adjusting the identified horizontal offset by a correction factor proportional to the distance. - View Dependent Claims (13, 15, 16, 17, 18, 19, 20, 21, 22)
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14. (canceled)
Specification