US 12,291,001 B2
Insole manufacturing method
Satoshi Nakagawa, Kashiba (JP)
Assigned to REVE INC., Nara (JP)
Appl. No. 18/274,462
Filed by REVE INC., Nara (JP)
PCT Filed Jul. 26, 2021, PCT No. PCT/JP2021/027466
§ 371(c)(1), (2) Date Jul. 27, 2023,
PCT Pub. No. WO2022/162973, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 2021-012627 (JP), filed on Jan. 29, 2021.
Prior Publication US 2024/0092047 A1, Mar. 21, 2024
Int. Cl. B29D 35/12 (2010.01); A43B 7/28 (2006.01); B29C 43/12 (2006.01); B29C 43/52 (2006.01); B29C 63/02 (2006.01); B29C 63/22 (2006.01); B29D 35/00 (2010.01); B29D 35/14 (2010.01); B29K 67/00 (2006.01); B29K 105/00 (2006.01); B29K 105/02 (2006.01); B29L 31/50 (2006.01)
CPC B29D 35/142 (2013.01) [A43B 7/28 (2013.01); B29C 43/12 (2013.01); B29C 43/52 (2013.01); B29C 63/02 (2013.01); B29C 63/22 (2013.01); B29D 35/0054 (2013.01); B29K 2023/06 (2013.01); B29K 2067/04 (2013.01); B29K 2105/02 (2013.01); B29K 2105/256 (2013.01); B29L 2031/504 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for manufacturing an insole, comprising:
a first step of forming a footprint resin portion having a footprint shape and a predetermined thickness using a thermoplastic resin which melts at a predetermined temperature;
a second step of performing shrink processing such that the footprint resin portion is covered with a film, and thereafter vacuum packing the footprint resin portion covered with the film in a nylon polyethylene bag, wherein the film covers the whole surface of the footprint resin portion and is shrunk while air is removed to seal the footprint resin portion;
a third step of heating to melt the sealed footprint resin portion manufactured through the first step and the second step at a predetermined temperature;
a fourth step of attaching the heated and sealed footprint resin portion melted by the third step to the inside of a shoe of a user, and hardening the footprint resin portion by leaving the footprint resin portion to stand inside the shoe for a predetermined time period while the user is wearing the shoe; and
a fifth step of peeling the film from the hardened footprint resin portion after the third step and the fourth step, and thereafter attaching a flexible sheet portion to a side of the footprint resin portion to be in contact with the user's sole.