Method of making a blown hollow article having a ribbed interior surface
US4170622A · kind A · utility
130Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1978 |
| Grant date | Oct 9, 1979 |
| Priority date | — |
| Expiry date | Aug 7, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2501/0045
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is disclosed for reinforcing hollow articles, such as bottles, blow molded from a heated thermoplastic material. A hollow parison is preformed with concave grooves in its exterior surface and corresponding ribs on its interior surface at locations in which the finished article is to be reinforced. The parison is then blow molded into the finished article. The blowing pressure and the temperature of the thermoplastic material collapse and fuse the concave grooves to form solid reinforcement ribs located inside the article while the exterior of the article has a rib-free surface defined by the blow mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.