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Title:
DEVICE AND METHOD FOR DETECTING DEFECT IN CORRUGATED CARDBOARD SHEET, DEVICE FOR ELIMINATING DEFECT IN CORRUGATED CARDBOARD SHEET, AND DEVICE FOR MANUFACTURING CORRUGATED CARDBOARD SHEET
Document Type and Number:
WIPO Patent Application WO/2022/014233
Kind Code:
A1
Abstract:
In a device and a method for detecting a defect in a corrugated cardboard sheet, a device for eliminating a defect in a corrugated cardboard sheet, and a device for manufacturing a corrugated cardboard sheet, the device for detecting a defect in a corrugated cardboard sheet which detects a defect in a wavy core affixed to a liner is provided with: an irradiation device that irradiates the core with light; an imaging device that captures an image of a light irradiated part in the core; an image processing device that defines a change degree of a light amount value along a conveyance direction of the corrugated cardboard sheet on the basis of the image captured by the imaging device; and a first determination device that compares the change degree of the light amount value with a previously-set first determination value to determine quality.

Inventors:
TAKEMOTO SHUICHI (JP)
FUKUSHIGE NAOYUKI (JP)
Application Number:
PCT/JP2021/022501
Publication Date:
January 20, 2022
Filing Date:
June 14, 2021
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND MACH SYSTEMS LTD (JP)
International Classes:
B31F1/28; G01N21/892
Domestic Patent References:
WO2017017399A12017-02-02
Foreign References:
JP2018192632A2018-12-06
JPH06238782A1994-08-30
JP2018192633A2018-12-06
JP2017133998A2017-08-03
JP2017035755A2017-02-16
JP6227024B22017-11-08
Other References:
See also references of EP 4155067A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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