Multi-screw, continuous, material processing systems
US4136968A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1977 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Jul 27, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92876
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved system for treating material proceeding continuously through a processing barrel having at least twin interconnected cylinders with saddle portions of generally V cross section at the points of interconnection of the cylinders. Twin rotating parallel mixer shafts, co-axially mounted in the cylinders, have radially interwiping screw or paddle elements between a material charging inlet and a material discharging outlet which are configured to wipe the cylinders including the saddle portions. Sets of paddle elements, each of which includes a cylinder closing paddle, are provided on the shafts at a flow control station between the inlet and outlet, and a movable flow-controlling saddle or valve element is mounted with relation to the cylinder closing paddle sets in a position such that it can be moved from an opened position to a position to restrict or block flow past the sets of paddle elements. A vacuum vent port can be provided for degassing or like purposes in the barrel casing at the flow control station in a position in which its relationship with the elements is such as to avoid the flow of product out the port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.