Roll seal boxes for continuous vacuum treating apparatus
US4501428A · kind A · utility
6Cited by
7References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 18, 1984 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Jun 18, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A continuous vacuum treating apparatus for subjecting a workpiece of soft material, such as a plastic molding to continuous surface treatment by an air-to-air system in vacuum, including a vacuum treating chamber and a plurality of auxiliary vacuum chambers located anterior and posterior to the vacuum treating chamber. The diameter of each of an upper seal roll and a lower seal roll of each of the auxiliary vacuum chambers located on the vacuum treating chamber side is smaller than the diameter of each of an upper seal roll and a lower seal roll of the auxiliary vacuum chamber located closest to the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.