System for drying and expanding of flat materials such as leather
US4438570A · kind A · utility
15Cited by
3References
10Claims
0Family size
Inventor
Key dates
| Filing date | Mar 13, 1981 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Mar 13, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC14B1/26
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and process for expanding the area and for drying of leather pieces, felts and other similar flat materials. On both sides of the leather elastic foils impervious to air are disposed, a vacuum is connected to the space between the two foils and then forces are applied for enlarging the area of the foils, where the forces are predominantly disposed in the plane of the foils. Thermal energy can be fed to the flat material. The forces can be intermittently applied and they can be provided preferably by hydraulic or pneumatic means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.