Title:
光学フィルムの製造方法及び光学フィルムの製造装置
Document Type and Number:
Japanese Patent JP7454937
Kind Code:
B2
Abstract:
An optical film 4 production method according to an embodiment of the present invention produces an optical film by implementing N processes (where N is an integer of 1 or higher) on a long film 2. The N processes are performed while the film is conveyed, and the width of the film is continuously measured at a plurality of locations 20 during conveyance. The rate of change of the width of the film is calculated on the basis of the measurement results obtained simultaneously at the upstream location and the downstream location among two locations selected from the plurality of locations.
Inventors:
Takuya Ando
▲高▼橋 英史
Keiji Amitani
▲高▼橋 英史
Keiji Amitani
Application Number:
JP2019223198A
Publication Date:
March 25, 2024
Filing Date:
December 10, 2019
Export Citation:
Assignee:
Sumitomo Chemical Co., Ltd.
International Classes:
G02B5/30; G01B11/02
Domestic Patent References:
| JP2010030099A | ||||
| JP8226811A | ||||
| JP2016139151A | ||||
| JP2014164001A | ||||
| JP2016148779A | ||||
| JP2014062817A | ||||
| JP2016215393A |
Foreign References:
| US4984458 |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshinori Shimizu
Takashi Mikami
Kenichiro Wada
Yoshinori Shimizu
Takashi Mikami
Kenichiro Wada