Tube of thermoplastics with thickened end
US4150087A · kind A · utility
20Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1976 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Dec 3, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/218
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tube of thermoplastic material is heated to plasticity, whereupon the heated tube is provided with a thickened end by subjecting the tube to an upsetting action in such a way that the thickening starts at a distance from the free end of the heated part and increases gradually from this point towards the free end of the heated part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.