Method of making a blown vessel provided with a mouth, an insert for being overmolded by blowing a parison, and a blown vessel including such an overmolded insert
US6527892B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2000 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Nov 13, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1352
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of making a blown vessel provided with a passage suitable for putting the inside of the vessel into communication with the outside thereof and including a mouth on the outside, said method comprising the following steps:overmolding an insert of tubular shape in a parison while it is being blown so that the parison covers one of the ends of the insert, while leaving the opposite end of the insert projecting outside the vessel so as to constitute the outside mouth of the passage, the vessel made from the parison having at least a first layer forming a hydrocarbon barrier and a second layer that is more permeable to hydrocarbons than the first and that is outside it; andthen eliminating at least a portion of the wall lying inside the insert, the insert being shaped to lengthen the diffusion path for hydrocarbons diffusing along the second layer from the edge of the vessel adjacent to the removed wall portion towards the outside of the vessel, and/or to form one or more regions of reduced thickness in said second layer along the diffusion path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.