Drum filter take-off
US4673496A · kind A · utility
Inventor
Key dates
| Filing date | Sep 9, 1985 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Sep 9, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D33/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Pulp sheet take-off apparatus which allows removal of drum valve parts from existing high vacuum rotary drum filters and significantly increases the production capability of existing and newly designed high vacuum rotary drum filters includes an enclosed take-off chamber that is mounted immediately adjacent and parallel to the face of the filter drum on the descending side thereof, the chamber being connected by piping to the filter drum barometric leg or other subatmospheric pressure source as a means of maintaining subatmospheric pressure in the chamber equal to or less than the internal pressure of the filter drum. A fixed pulp sheet slide is arranged to remove the pulp sheet from the filter surface while atmospheric air is prevented from entering into the chamber, and pulp sheet discharge mechanism includes a vaned discharge roll that is mounted immediately adjacent and parallel to the top surface of the stock slide structure and includes means for biasing the discharge roll against the pulp sheet and means for rotating the discharge roll in the direction of pulp sheet movement to draw the pulp sheet out of the take-off chamber between the roll and the stock slide structure. Th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.