Title:
FILM DEFECT DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/200157
Kind Code:
A1
Abstract:
A film defect detection device according to an embodiment of the present invention, which determines whether or not a film is defective by using the difference in light and shade of transmitted light, comprises: a frame unit in which a plurality of profiles are connected to form a frame; a light emitting unit mounted on the frame unit, mounted to be inclined with a bottom surface, and emitting light upward toward a front side; and a roller unit which winds a film unwound from a film roll to a recovery roll via the light emitting unit while the film is unfolded, wherein the light emitting unit is formed of a rectangular panel and emits light toward a front surface so that a defect can be identified due to a difference in brightness of light transmitted through an unwound film closely adhered to a surface.
Inventors:
CHOI BYUNG KI (KR)
CHOI JAE KOO (KR)
KIM JIN (KR)
RYU KYEONG LI (KR)
CHOI JAE KOO (KR)
KIM JIN (KR)
RYU KYEONG LI (KR)
Application Number:
PCT/KR2023/004315
Publication Date:
October 19, 2023
Filing Date:
March 30, 2023
Export Citation:
Assignee:
ENVICONS CO LTD (KR)
International Classes:
G01N21/89; B65H18/10; B65H23/26; B65H43/08; B65H75/24; G01N21/84; G01N21/88; G01N21/896
Foreign References:
| CN210534014U | 2020-05-15 | |||
| JPH08114432A | 1996-05-07 | |||
| JP2014118552A | 2014-06-30 | |||
| JP2015212198A | 2015-11-26 | |||
| US20050145742A1 | 2005-07-07 | |||
| KR102421167B1 | 2022-07-15 |
Attorney, Agent or Firm:
LEE, Dong-Woo (KR)
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