Patent · US Expired

Method and apparatus for liquid treatment of pulp

US4921650A · kind A · utility

7Cited by

2References

15Claims

0Family size

Assignee

Sunds Defibrator Aktiebolag · SE

Inventors

Kjell Eriksson · Spånga, SE
Bo Ek · Uppsala, SE
Stig G. Wallin · Leksand, SE
Nils Eriksson · Djurås, SE

Key dates

Filing date	Jul 16, 1987
Grant date	May 1, 1990
Priority date	—
Expiry date	Jul 16, 2007

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB07B7/086
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Fibre material is defibrated and dispersed in an air flow and introduced through an inlet (2) into a forming head (1). In the forming head (1) the inlet transforms to a single-curved convex surface (5), which leads all the way to an accept outlet (6). A screen (7) is located at adjustable distance from the curved surface (5) for dividing ingoing fibre/air flow into accept and reject. An outlet (10) for the reject is located behind the screen (7). At a distance of 10-150 mm from the accept outlet (6) a running air-pervious support (27) is located, on which the web precipitates.

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