Apparatus to dry/heat treat continuous web stock of film
US5287637A · kind A · utility
6Cited by
17References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Mar 27, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2081/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for the constrained drying and/or heat treating of a continuous or roll of, web stock of film. This apparatus includes a mechanism which grasps a film by its edges and moves said film through a drying zone, with said mechanism holding said film taut without substantial stretching of said film in the drying zone, and a means to remove the evaporated solvent from said apparatus. The apparatus is particularly useful for drying film of polybenzoxazole, polybenzothiazole and copolymers thereof, as well as molecular composite films. A method of drying/heat treating film is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.