Title:
OPTICAL FILM ROLL MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2014/132625
Kind Code:
A1
Abstract:
One aspect of the present invention is an optical film roll manufacturing method which comprises a step of manufacturing a resin film in an elongated shape having an embossed portion on both widthwise edges along the longitudinal direction, and a winding step of winding the resin film into a roll on a winding core, wherein the winding step comprises a vibration winding step of winding the resin film onto the winding core while periodically vibrating the resin film and/or the winding core in the width direction of the resin film such that the area enclosed by f(x) and the x-axis thereof is larger than the area enclosed by a sine-wave vibration a(x) that has the same amplitude and period as f(x) and the x-axis and is smaller than the area enclosed by a square wave vibration b(x) that has the same amplitude and period as f(x) and the x-axis, wherein in f(x) the x-axis is the accumulated thickness of the wound resin film and the y-axis is the widthwise distance between the centers of the resin film and the winding core.
Inventors:
IWAGAMI NAOYA (JP)
Application Number:
PCT/JP2014/000979
Publication Date:
September 04, 2014
Filing Date:
February 25, 2014
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
B65H18/10; B65H18/28
Foreign References:
| JP2010150041A | 2010-07-08 | |||
| JPS60197554A | 1985-10-07 | |||
| JPS60258044A | 1985-12-19 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
Etsuji Kotani (JP)
Etsuji Kotani (JP)
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