Method for measuring label width of handheld label printer
A technology of width measurement and labeling, applied in printing devices, measuring devices, printing and other directions, can solve the problems of printing and paper feeding errors, aging, inaccurate measurement labels, etc., to reduce the failure rate, prolong the service life, and ensure accurate sexual effect
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[0021] like figure 1 As shown, in the present invention, the label printer uses an infrared photoelectric sensor to measure the width of the label in a reflective manner. The label paper roll includes a backing paper 1 and a plurality of labels 2 attached to the backing paper 1. When replacing a new label paper roll , it is necessary to measure the width L of the new label 2 and the gap S of the backing paper 1 between the two labels 2 .
[0022] like figure 2 As shown, due to the influence of the mechanical structure of the label printer, the label roll can only advance in one direction. Assuming that the label paper roll advances from right to left, the infrared photoelectric sensor includes a transmitting photoelectric cell 3 and a receiving photoelectric cell 4. The emitting photoelectric cell 3 emits infrared rays, which reflect on the surface of the label 2, and the receiving photoelectric cell 4 receives the emitted infrared rays. Label 2 and backing paper 1 have dif...
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