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 on a holder assembly with a fixed distance, L, between the first sensor and the second sensor;
b) feeding a label near the first and second sensors on the holder assembly;
c) sensing a position of a first edge of the label, L1A, by the first sensor as the label moves near the first sensor;
d) sensing a second position of the first edge of the label, L1B, by the second sensor as the label moves near the second sensor;
e) calculating the distance, L1AB, between the first position and the second position;
f) calculating the line feed error over the fixed distance, L, by taking the difference (L−
L1AB); and
g) calculating the feed correction to be done to the label, where the feed correction is given by [(L−
L1AB)/L]×
D, where D is a distance between the first sensor and a burn line of the printer.
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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.
580 Citations
17 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 on a holder assembly with a fixed distance, L, between the first sensor and the second sensor; b) feeding a label near the first and second sensors on the holder assembly; c) sensing a position of a first edge of the label, L1A, by the first sensor as the label moves near the first sensor; d) sensing a second position of the first edge of the label, L1B, by the second sensor as the label moves near the second sensor; e) calculating the distance, L1AB, between the first position and the second position; f) calculating the line feed error over the fixed distance, L, by taking the difference (L−
L1AB); andg) calculating the feed correction to be done to the label, where the feed correction is given by [(L−
L1AB)/L]×
D, where D is a distance between the first sensor and a burn line of the printer. - View Dependent Claims (2, 3, 4, 5)
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6. A system to calculate line feed error on a printer, comprising:
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a holder assembly, the holder assembly positioned in the printer before a printer burn line; a first sensor and a second sensor disposed on the holder assembly with a fixed distance, L, between the first sensor and the second sensor; a processor communicatively linked to the first sensor and the second sensor; the first sensor being configured to sense a first position of a first edge of the label, L1A, as the label moves over the first sensor; the second sensor being configured to sense a second position of the first edge of the label, L1B, as the label moves over the second sensor; the processor being configured to calculate a distance, L1AB, between the first position and the second position; and the processor being further configured to calculate a line feed error over the fixed distance, L, by taking the difference (L−
L1AB). - View Dependent Claims (7, 8, 9, 10, 11)
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12. 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 on a holder assembly with a fixed distance, L, between the first sensor and the second sensor; b) feeding a label having an optical feature near the first and second sensors on the holder assembly; c) sensing a position of the optical feature, L1A, by the first sensor as the label moves near the first sensor; d) sensing a second position of the optical feature, L1B, by the second sensor as the label moves near the second sensor; e) calculating a distance, L1AB, between the first position and the second position; f) calculating a line feed error over the fixed distance, L, by taking the difference (L−
L1AB); andg) calculating a feed correction to be done to the label, where the feed correction is given by [(L−
L1AB)/L]×
D, where D is a distance between the first sensor and the burn line of the printer. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification