Process and apparatus for sealing a plurality of filter elements
US4414172A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1982 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | May 21, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/737
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a process and apparatus for making sealed filter units which include a plurality of filter elements. The apparatus includes a lower mold half for supporting a filter element support and a retractable locater member. The retractable locater member includes a reduced cross-sectional notched portion which projects above the lower mold half. When retracted into the lower mold half, the notched portion in conjunction with the upper and lower mold halves forms a cavity along the outer and upper peripheral edges of the filter elements and support. A thermoplastic material is injected into this cavity to capture the filter elements to the filter element support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.