Patent · US Expired

Pulper for producing paper pulp suspensions

US4460132A · kind A · utility

10Cited by

3References

17Claims

0Family size

Assignee

J.M. Voith GmbH · DE

Inventors

Helmut Thumm · Heidenheim, DE
Theodor Bahr · Heidenheim, DE
Herbert Ortner · Heidenheim, DE

Key dates

Filing date	Jun 21, 1982
Grant date	Jul 17, 1984
Priority date	—
Expiry date	Jun 21, 2002

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21B1/345
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

An apparatus for pulping paper into a pulp suspension is disclosed. A vertical container has an upper paper pulping zone and a lower pulp diluting and outlet zone beneath the pulping zone. A narrowed despecking slot communicates between the two zones. A rotor in the container circulates and breaks up the paper in the presence of the liquid in the pulping zone. Ribs on the rotor cooperate with stators in the container for defining the despecking slot. A pulp suspension dilution water inlet communicates into the dilution zone. The outlet from the container also communicates from the dilution zone. A screen protects the outlet from the dilution zone against exit of large particles therethrough and vanes on the rotor clean the screen.

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