Sealing method using heat-shrinkable film
US4379009A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1981 |
| Grant date | Apr 5, 1983 |
| Priority date | — |
| Expiry date | Jul 17, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1033
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for sealing an object having a peripheral surface, surfaces substantially perpendicular to the peripheral surface and infinite enlongated bodies projecting from the surfaces perpendicular to the peripheral surface, which method comprises: wrapping the peripheral surface with a heat-shrinkable film in such a manner that both side edges of the film extend beyond the side edges of the peripheral surface; bonding longitudinal edges of the film to each other; and heating the heat-shrinkable film to permit the film to shrink to thereby seal the peripheral surface and a peripheral portion of the surfaces perpendicular to said peripheral surface, except said infinite elongated bodies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.