Device for detecting defects in single faced corrugated fiberboards
First Claim
1. A device for detecting defects in a web of single faced corrugated fiberboard while it is running, said device comprising:
- a light source disposed near the track of said web for irradiating a light to the corrugated surface of said web to produce a striped image;
an image pick-up means for scanning the striped image at a predetermined period by interlaced scanning in a direction perpendicular to the stripes on the striped image to convert the striped image to picture signals and giving the picture signals in a time series manner in synchronization with said period;
a comparator means for converting said picture signals to binary-coded signals, the number of which corresponds to the number of stripes;
a counter for counting the binary-coded signals; and
a computer for comparing the count from said counter with a preset number to detect defects in the single faced corrugated fiberboard.
1 Assignment
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Accused Products
Abstract
A device for detecting any defects in single faced corrugated fiberboard while it is running. A light is irradiated to the corrugated surface of the fiberboard and the striped image is scanned by an image pick-up unit and the picture signal is converted to binary-coded signal to discriminate the number of stripes or corrugations. The number is counted by a counter and compared with a normal number by a microcoputer. If there is too large a difference between them, the scanned part is judged as defective. This device can detect any defects in a running web at a sufficiently high speed to follow the line speed of a corrugating machine.
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Citations
6 Claims
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1. A device for detecting defects in a web of single faced corrugated fiberboard while it is running, said device comprising:
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a light source disposed near the track of said web for irradiating a light to the corrugated surface of said web to produce a striped image; an image pick-up means for scanning the striped image at a predetermined period by interlaced scanning in a direction perpendicular to the stripes on the striped image to convert the striped image to picture signals and giving the picture signals in a time series manner in synchronization with said period; a comparator means for converting said picture signals to binary-coded signals, the number of which corresponds to the number of stripes; a counter for counting the binary-coded signals; and a computer for comparing the count from said counter with a preset number to detect defects in the single faced corrugated fiberboard. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification