Apparatus for forming films of constant thickness
US4556324A · kind A · utility
21Cited by
9References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 1, 1984 |
| Grant date | Dec 3, 1985 |
| Priority date | — |
| Expiry date | May 1, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Counter-rotating intermeshing rotors are employed to generate films of viscous material to enhance processing. The rotors are configured that they trap viscous material in open-ended chambers defined by the rotor surfaces. As rotation proceeds the chambers decrease in volume and the material is expelled through the ends of the chambers as a film. Longitudinally adjacent rotors each have a different angular orientation about their centers of rotation to provide a sawtooth stepped helix to convey material longitudinally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.