Label Detection Method and Label Printer
First Claim
1. A label detection method, comprising steps of:
- conveying label paper having labels affixed at intervals on a continuous liner through a transportation path;
detecting a plurality of detection beams of emitted light that are emitted to the label paper at a plurality of detection positions in the transportation direction of the label paper on the transportation path; and
detecting the labels or marks printed on the label paper based on a detected difference in the plurality of detection beams.
1 Assignment
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Accused Products
Abstract
Labels can be detected on various types of label paper. Two photodetectors are disposed side by side in the transportation direction of label paper either above or below the transportation path of the printer, and a light-emitting device is disposed at a position opposite the photodetectors with the transportation path therebetween. Alternatively, the light-emitting device is disposed at a position between the photodetectors. Each time the label paper is advanced a unit amount, the light that passes through or the light that is reflected by the parts of the label paper at the detection positions on the transportation path is detected, and whether the amplified difference of these two detector outputs is greater than or equal to a specific threshold value set according to the difference in the transmittance of the liner and the label is determined. Passage of an edge part of a label or black mark between the detection positions is detected based on the result of this decision.
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Citations
15 Claims
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1. A label detection method, comprising steps of:
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conveying label paper having labels affixed at intervals on a continuous liner through a transportation path; detecting a plurality of detection beams of emitted light that are emitted to the label paper at a plurality of detection positions in the transportation direction of the label paper on the transportation path; and detecting the labels or marks printed on the label paper based on a detected difference in the plurality of detection beams. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A label printer, comprising:
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a transportation mechanism that conveys label paper having labels affixed at intervals on a continuous liner through a transportation path; a light-emitting unit that emits an emitted light to the label paper at a plurality of detection positions in the transportation direction of the label paper on the transportation path; a plurality of detection units that detect detection beams of the emitted light at the plurality of detection positions; and an evaluation unit that evaluates the position of the label or marks printed on the label paper based on a difference of the output values of the plurality of detection units. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification