Synthetic resin-made container, preform, and method of manufacturing synthetic resin-made container
US11780633B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2018 |
| Grant date | Oct 10, 2023 |
| Priority date | — |
| Expiry date | Feb 23, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2501/0018
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A synthetic resin-made container has an outer layer body and an inner layer body separably laminated on an inner surface of the outer layer body and is formed by stretch blow molding, and has: a tubular mouth portion; a shoulder portion located below the mouth portion and increasing in diameter downward; a barrel portion connected to and located below the shoulder portion; and a bottom portion closing a lower end of the barrel portion, wherein the mouth portion has an outside air introduction hole for introducing outside air into a space between the outer layer body and the inner layer body, and the inner layer body is made of a crystalline resin, and has, in at least a part of the mouth portion in the inner layer body, a crystallized region having a higher degree of crystallinity than other regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.