Process for perforating plastics tubes
US4112795A · kind A · utility
5Cited by
1References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1977 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Dec 9, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/283
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for perforating plastic tubes, in particular thin-walled corrugated tubes, by a punching or cutting operation wherein the plastic tubes are subjected to a direct or indirect treatment by a cooling fluid prior to the punching and cutting operation. The process is performed by an apparatus comprising a guide structure and conveying device for conveying the plastic tubes, and further comprising punching or cutting members, while spraying devices are provided for effecting the above-mentioned cooling treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.