Method and system to calculate line feed error in labels on a printer
First Claim
1. A method of calculating line feed error on a printer comprising the steps of:
- a) providing a first sensor and a second sensor under a feed line, wherein the first sensor and the second sensor are separated by a fixed distance;
b) sensing a first position of a first optical feature of a label by the first sensor as the label moves near the first sensor;
c) sensing a second position of the first optical feature of the label by the second sensor as the label moves near the second sensor;
d) calculating a deviation between the fixed distance and distance between the first position and the second position calculation;
e) calculating a ratio of the calculated deviation with respect to the fixed distance; and
f) calculating a feed correction by applying the ratio to a distance value, wherein the distance value is a distance between the first sensor and a burn line of the printer.
2 Assignments
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Accused Products
Abstract
A system to calculate line feed error in labels on a printer includes a holder assembly under the label line feed and before the printer burn line; a first sensor and a second sensor on the holder assembly, a fixed distance, L, between them; and a processor. The first sensor senses a first position of a label edge, L1A. The second sensor senses a second position of the label edge, L1B. The processor calculates the distance, L1AB, between the first position and the second position and calculates the line feed error over the fixed distance, L, by taking the difference (L−L1AB). The processor calculates the feed correction to be done to the label, given by [(L−L1AB)/L]×D, where D is a distance between the first sensor and the burn line of the printer. The processor instructs the printer line feed to implement the calculated feed correction.
439 Citations
20 Claims
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1. A method of calculating line feed error on a printer comprising the steps of:
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a) providing a first sensor and a second sensor under a feed line, wherein the first sensor and the second sensor are separated by a fixed distance; b) sensing a first position of a first optical feature of a label by the first sensor as the label moves near the first sensor; c) sensing a second position of the first optical feature of the label by the second sensor as the label moves near the second sensor; d) calculating a deviation between the fixed distance and distance between the first position and the second position calculation; e) calculating a ratio of the calculated deviation with respect to the fixed distance; and f) calculating a feed correction by applying the ratio to a distance value, wherein the distance value is a distance between the first sensor and a burn line of the printer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of calculating line feed error on a printer comprising:
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sensing, with a first sensor, a first position of an optical feature of a label as the label moves in a feed line; sensing, with a second sensor, a second position of the optical feature of the label as the label moves in the feed line, wherein the first sensor and the second sensor are separated by a fixed distance; calculating a distance between the first position and the second position; and calculating a line feed error by subtracting the calculated distance from the fixed distance. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system to calculate line feed error on a printer, comprising:
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a first sensor and a second sensor separated by a fixed distance; the first sensor being configured to sense a first position of a first optical feature of a label as the label moves near the first sensor; the second sensor being configured to sense a second position of the first optical feature of the label as the label moves near the second sensor; and a processor communicatively linked to the first sensor and the second sensor, the processor being configured to; calculate a deviation between the fixed distance and distance between the first position and the second position calculation; calculate a ratio of the calculated deviation with respect to the fixed distance; and calculate a feed correction by applying the ratio to a distance value, wherein the distance value is a distance between the first sensor and a burn line of the printer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification