Automated production of canisters
US4714486A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1986 |
| Grant date | Dec 22, 1987 |
| Priority date | — |
| Expiry date | Jun 6, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49604
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter canister for use with gas masks has telescoping top and bottom parts that are, in the assembled canister, sealed together. A filter for particulate material is molded in situ in the top part, while a separate adsorbent material cartridge is fitted into the bottom part. In manufacturing the canister, the cartridge is manufactured separately, apart from the remainder of the canister so that it can be kept in a controlled environment so as to avoid possible contaminating due to a humid atmosphere. The molding of the filter for particulate materials normally a pleated paper filter, in situ and away from the cartridge avoids the requirement for a long adhesive drying time during which the adsorbent material in the cartridge is exposed to humidity. The new canister also exhibits greater strength than the known canisters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.