US 11,851,235 B2
Preform assembly, double container, and method of manufacturing double container
Takanori Suzuki, Tokyo (JP); and Osamu Jono, Tokyo (JP)
Assigned to YOSHINO KOGYOSHO CO., LTD., Tokyo (JP)
Appl. No. 17/598,431
Filed by YOSHINO KOGYOSHO CO., LTD., Tokyo (JP)
PCT Filed Mar. 5, 2020, PCT No. PCT/JP2020/009504
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/195688, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-064660 (JP), filed on Mar. 28, 2019.
Prior Publication US 2022/0177180 A1, Jun. 9, 2022
Int. Cl. B65D 1/02 (2006.01); B65D 79/00 (2006.01); B29B 11/04 (2006.01); B29C 49/08 (2006.01); B29C 49/22 (2006.01); B29C 49/02 (2006.01); B29K 67/00 (2006.01); B29L 31/00 (2006.01)
CPC B65D 1/0246 (2013.01) [B29B 11/04 (2013.01); B29C 49/0208 (2022.05); B29C 49/085 (2013.01); B29C 49/22 (2013.01); B65D 1/0276 (2013.01); B65D 79/0084 (2020.05); B29C 2949/0744 (2022.05); B29C 2949/3026 (2022.05); B29K 2067/003 (2013.01); B29L 2031/7158 (2013.01); B65D 2501/0027 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A double container comprising:
an outer layer body that includes a tubular outer mouth portion and a bottomed tubular barrel portion connected to the outer mouth portion via a shoulder portion and in which a thin wall portion extending in a vertical direction is provided in the shoulder portion; and
an inner layer body that includes a tubular inner mouth portion and a volume-reduction deformable containing portion connected to the inner mouth portion and separably laminated on an inner surface of each of the shoulder portion and the barrel portion,
wherein an outside air introduction port communicating with a part between the outer layer body and the inner layer body is provided in a mouth portion composed of the outer mouth portion and the inner mouth portion located on an inner side of the outer mouth portion, and
wherein the thin wall portion is formed by a depression provided on the inner surface of the shoulder portion as a recess so as to reduce a thickness of the shoulder portion and having, in a top view, an approximately triangular shape that increases in circumferential width in a radially outward direction.