Heat sealing device
US4737231A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 7, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Jan 7, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1741
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is a device for sealing portions of an overlapped pair of single or composite films by contacting or facing an appropriately heated sealing surface of a heat sealing member. The heat sealing member is provided with the sealing surface in a part of its outer surface and with a sealed chamber therewithin in the vicinity of the sealing surface. The sealed chamber contains under decompression working liquid for evaporating and generating high-temperature condensable gas by being heated. The heat sealing member further has a heat source in the interior or the exterior thereof adjacent to at least a part of the sealed chamber for heating the working liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.