Patent · US Expired

Apparatus for processing waste paper

US4283275A · kind A · utility

14Cited by

4References

8Claims

0Family size

Assignee

Escher Wyss GmbH · CH

Inventors

Wolfgang Heinbockel · Weingarten, DE
Wolfgang Siewert · Ravensburg, DE
Albrecht Kahmann · Weingarten, DE
Gerhard Lambrecht · Weingarten, DE

Key dates

Filing date	Apr 7, 1980
Grant date	Aug 11, 1981
Priority date	—
Expiry date	Apr 7, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/64
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An installation for processing waste paper containing a stock pulper or slusher equipped with a rotor and two sieves or screens having different size holes or openings. By means of the sieve having the larger size openings there is conducted the obtained stock suspension through a primary line system which, for instance, leads to a papermaking machine. Cooperating with the sieve having the larger size openings or holes is an auxiliary circulation circuit containing a device for the removal of contaminants or rejects. There is preferably arranged at the auxiliary circulation circuit or system a separator for heavy contaminants or rejects, a pump, a secondary stock pulper or fiberizer and a sieve or filtering device.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.