Blow mold having slots to allow air to escape
US5935620A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Dec 3, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/812
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention concerns a molding device with a longitudinal axis, comprising a first half-shell and a second half-shell, the two half-shells being capable of being joined along an opening plane so as to form a cavity with an elongate cross-section, having a major axis and a minor axis. The opening plane of the mold is substantially perpendicular to the major axis. In accordance with the invention, each half-shell comprises at least two separate longitudinal parts joined along at least one joint surface, each joint surface being delimited by two opposed sides of two adjacent parts, at least one of the sides having at least one recess so as to define with the other side at least one narrow slot to allow air to escape along the surface during the blow molding of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.