Title:
フィルム巻回体、及び、フィルム巻回体の製造方法
Document Type and Number:
Japanese Patent JP7285881
Kind Code:
B2
Abstract:
Provided is a film roll capable of suppressing the occurrence of winding defects. The film roll (1) comprises a wound resin film (20), the resin film (20) includes knurled parts (31, 32) at both ends in the width direction of the resin film (20), the knurling parts (31, 32) include a plurality of unit knurls (40) regularly arranged at intervals from each other, and each unit knurl (40) includes a columnar upper convex part (41) formed the upper surface (21) of the resin film (20) and a columnar lower convex part (42) formed on the lower surface (22) of the resin film (20) and protruding downward, wherein when viewed from a plane, the lower convex part (42) is concentrically arranged with the upper convex part (41) while being disposed inside the upper convex part (41).
Inventors:
Takeshi Maeda
Masato Uechi
Shogo Yamamoto
Keita Maeda
Noriaki Hata
Masaru Shinagawa
Nobuyuki Haida
Masato Uechi
Shogo Yamamoto
Keita Maeda
Noriaki Hata
Masaru Shinagawa
Nobuyuki Haida
Application Number:
JP2021090343A
Publication Date:
June 02, 2023
Filing Date:
May 28, 2021
Export Citation:
Assignee:
TOYO KOHAN CO.,LTD.
NITTO DENKO CORPORATION
NITTO DENKO CORPORATION
International Classes:
B65H18/28
Domestic Patent References:
| JP2015189051A | ||||
| JP2012118238A | ||||
| JP2009040964A |
Attorney, Agent or Firm:
Patent Attorney Corporation Tokoshie Patent Office