Device for thermoforming a plastic film
US9004895B2 · kind B2 · utility
0Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 2010 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Sep 9, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/0016
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A thermoforming device heats a plastic film to a substantially uniform temperature, in order to impart a curved shape to said film. The device includes a chamber, the internal pressure of which is variable and which is closed by the film, a system for measuring a sag in the film arranged outside the chamber and opposite said film, and a system for heating the film. The heating system includes a hot air blowing unit which is suitable for producing a hot airflow flowing parallel to the film between two opposite edges of said film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.