Method and device for detecting position for crease line of packaging web
PCT No. PCT/SE95/00269 Sec. 371 Date Oct. 30, 1996 Sec. 102(e) Date Oct. 30, 1996 PCT Filed Mar. 17, 1995 PCT Pub. No. WO95/25941 PCT Pub. Date Sep. 28, 1995The position of a transverse crease line of a moving packing web is sensed in that light reflected from the web and emanating from a laser dire...
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| creator | HANS AHLEN |
| description | PCT No. PCT/SE95/00269 Sec. 371 Date Oct. 30, 1996 Sec. 102(e) Date Oct. 30, 1996 PCT Filed Mar. 17, 1995 PCT Pub. No. WO95/25941 PCT Pub. Date Sep. 28, 1995The position of a transverse crease line of a moving packing web is sensed in that light reflected from the web and emanating from a laser directed perpendicularly to the web is received by photo detectors from two directions in the direction of movement of the web and under an angle of for example 60 DEG in relation to the light beam directed to the web. The electrical measuring signal emanating from the photo detectors is compared in an electronic signal processor with a reference signal, which is stored in the processor and is representative of a reference crease line. A crease line is indicated when the value of a correlation signal, which constitutes a calculation of conformity between the measuring signal and the reference signal, reaches a maximum. In a corresponding way, the position of a longitudinal crease line can be sensed. |
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Date Sep. 28, 1995The position of a transverse crease line of a moving packing web is sensed in that light reflected from the web and emanating from a laser directed perpendicularly to the web is received by photo detectors from two directions in the direction of movement of the web and under an angle of for example 60 DEG in relation to the light beam directed to the web. The electrical measuring signal emanating from the photo detectors is compared in an electronic signal processor with a reference signal, which is stored in the processor and is representative of a reference crease line. A crease line is indicated when the value of a correlation signal, which constitutes a calculation of conformity between the measuring signal and the reference signal, reaches a maximum. 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No. WO95/25941 PCT Pub. Date Sep. 28, 1995The position of a transverse crease line of a moving packing web is sensed in that light reflected from the web and emanating from a laser directed perpendicularly to the web is received by photo detectors from two directions in the direction of movement of the web and under an angle of for example 60 DEG in relation to the light beam directed to the web. The electrical measuring signal emanating from the photo detectors is compared in an electronic signal processor with a reference signal, which is stored in the processor and is representative of a reference crease line. A crease line is indicated when the value of a correlation signal, which constitutes a calculation of conformity between the measuring signal and the reference signal, reaches a maximum. In a corresponding way, the position of a longitudinal crease line can be sensed.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING |
| title | Method and device for detecting position for crease line of packaging web |
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