Devolatilizing and/or processing systems and methods
US5306452A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1993 |
| Grant date | Apr 26, 1994 |
| Priority date | — |
| Expiry date | Mar 23, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A continuous, self-wiping, multiple parallel shaft processing and/or extruding system wherein material is charged to a barrel in which the shafts extend at one end and discharged at another. The barrel has an interior chamber defined by parallel intersecting cylinders providing generally V-shaped saddles at their confluence, and parallel shaft rotate within the cylinders at the same speed of rotation and in the same direction of rotation Radially co-wiping helical processing elements are fixed respectively on the shafts and are configured to also wipe the walls of said cylinders. A vent for egressing volatiles leads from the chamber, and a vent bypass passage has a first section leading from the chamber upstream from the vent, a midsection extending coextensively with the chamber within the barrel, and a return section returning to the chamber. The helical processing elements including forwardly pitched elements for moving material in the chamber toward the vent and reversely pitched helical elements immediately upstream from the vent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.