Process and apparatus for preparing double edge on flexible sheet material
US3978191A · kind A · utility
21Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1974 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Mar 11, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1011
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a process and apparatus for applying a double edge to any flexible sheetlike material by bending over a portion of the sheet edge on each side of said sheetlike material. The sheetlike material must then be cured or made rigid by heating. The entire process and the apparatus also is handled as an integral operation with the forming and curing of the flexible sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.