Seal for a sterilizable bag and method of making the same
US6279745A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2000 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Mar 3, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B70/64
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a system and method for a seal for a sterilizable bag. This seal is made between a first polymeric sheet material (5) and a second polymeric sheet material (3). The first sheet material (5) should be sufficiently porous so as to allow or permit gas or steam sterilization but substantially impervious to bacteria. The second sheet material (3) includes an outer heat sealable layer. The seal (4) is fabricated from a first thermal surface weld (15) between the heat sealable layer of the second sheet material (3) and the first sheet material (5), and a second thermal melt weld (12) between at least the heat sealable layer of the second sheet material (3) and the first sheet material (5). The thermal melt weld (12) may be narrower than the first weld (11) and lying within the boundaries of the first weld (11). Furthermore, seal (4) may be sufficiently flat in order to allow a cross-heat seal using conventional equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.