Filter element and manufacture method thereof
US5435870A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1993 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Jun 16, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31C1/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for manufacturing filter elements, in which sealant does not get onto the rolling claw and rolling of the roll filter paper is made easy. A long roll filter paper having laterally oriented filter parts for filtering, the filter parts being open on the inflow side of the roll filter paper and closed on the outflow side of the roll filter paper, is rolled. During rolling, a sealant is applied to the surface of the roll filter paper in a narrow longitudinal strip, in such a way that the sealant does not make contact with the rolling claw. The roll-start end of the roll filter paper is gripped with the rolling claw during rolling. The rolling claw is made up of 2 or 4 rolling bars having the shape of the parts produced when a cylinder is split into two halves along its axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.