Patent · US Expired

Method for emptying suspension for a pulper

US4818338A · kind A · utility

2Cited by

7References

9Claims

0Family size

Assignee

J.M. Voith GmbH · DE

Inventors

Theodor Bahr · Heidenheim, DE
Helmut Thumm · Heidenheim, DE
Walter Musselmann · Heidenheim, DE

Key dates

Filing date	Aug 27, 1986
Grant date	Apr 4, 1989
Priority date	—
Expiry date	Aug 27, 2006

Classification

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

Abstract

In a pulping apparatus including a pulper with a rotor near the bottom therein, the pulper has a sluice outlet at the bottom for acceptable pulp suspension. Above the rotor at a corner of the pulper is a second outlet for suspension and dirt. A conduit leads from the second outlet to a horizontally oriented withdrawal apparatus chamber having a suspension agitating rotor at the end of the chamber opposite the entrance for pulp thereinto. A tangential outlet from the withdrawal apparatus chamber lead to a rotary, perforated sorting drum which permits exit of acceptable suspension and which has a rejected suspension and dirt outlet. A valve in the inlet to the withdrawal apparatus chamber is periodically and cyclically opened to permit periodic replacement of the suspension in the withdrawal apparatus chamber, and the suspension which has been agitated in the withdrawal apparatus chamber then moves to the sorting drum.

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