US 12,275,215 B2
Liquid storage member for coating tools
Saki Tanaka, Shinagawa-ku (JP); Takayuki Yamaguchi, Osaka (JP); and Yuichi Inagawa, Chiyoda-ku (JP)
Assigned to MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo (JP)
Appl. No. 18/258,945
Filed by MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo (JP)
PCT Filed Dec. 17, 2021, PCT No. PCT/JP2021/046777
§ 371(c)(1), (2) Date Jun. 22, 2023,
PCT Pub. No. WO2022/138498, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2020-214552 (JP), filed on Dec. 24, 2020.
Prior Publication US 2024/0042735 A1, Feb. 8, 2024
Int. Cl. B43K 7/02 (2006.01); B32B 1/08 (2006.01); B32B 7/12 (2006.01); B32B 15/12 (2006.01); B32B 15/20 (2006.01); B32B 29/06 (2006.01); B43K 5/02 (2006.01); B43K 7/08 (2006.01); B43K 8/03 (2006.01); B43K 8/14 (2006.01); B43K 8/16 (2006.01)
CPC B32B 15/12 (2013.01) [B32B 1/08 (2013.01); B32B 7/12 (2013.01); B32B 15/20 (2013.01); B32B 29/06 (2013.01); B43K 5/02 (2013.01); B43K 7/02 (2013.01); B43K 7/08 (2013.01); B43K 8/03 (2013.01); B43K 8/146 (2013.01); B43K 8/165 (2013.01); B32B 2255/12 (2013.01); B32B 2255/26 (2013.01); B32B 2307/546 (2013.01); B32B 2307/72 (2013.01); B32B 2307/7375 (2023.05); B32B 2597/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A liquid storage member for coating tools having at least three layers of: a paper base laminate composed of an inner layer made of paper base material and an intermediate layer of a metal layer or a silica vapor deposition layer formed on the outer surface side of the inner layer, and an outer layer made of the paper base material formed on the outer surface side of the intermediate layer;
having structures in which the paper base laminate is spirally wound, and the outer layer made of the paper base material is spirally wound around the outer surface side of the intermediate layer; and
having a polyolefin resin-containing adhesive layer at least either between the inner layer and the intermediate layer or between the intermediate layer and the outer layer.