Laboratory animal carrier filter bag
US4802900A · kind A · utility
Inventors
Key dates
| Filing date | Mar 12, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Mar 12, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A filter bag enclosure for containing a laboratory animal and a carrier therefor during transportation is provided with lateral and top seals which prevent gaseous communication with the laboratory animal therewithin except through the filter medium which forms the lateral sides of the filter bag. In accordance with the invention, the lateral edges of the filter bag are sealingly joined to one another by the application of acoustic energy. A length of sealing material, which may be polyethylene, is advantageously interposed between the edges prior to the application of the acoustic energy so as to enhance the reliability of the lateral seals. The top portion of the filter bag is provided with polyethylene strips joined thereto, illustratively by the use of ultrasonic acoustic energy. After the laboratory animal and its carrier is installed inside of the filter bag, the filter bag may be closed by conventional heat sealing of the polyethylene top strips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.