Patent · US Expired

Reverse centrifugal cleaning of paper making stock

US4155839A · kind A · utility

11Cited by

5References

11Claims

0Family size

Assignee

Black Clawson Company, Inc. · US

Inventors

Peter Seifert · Wittlich, DE
Derald R. Hatton · Middletown, US
Terry L. Bliss · Middletown, US

Key dates

Filing date	Nov 28, 1977
Grant date	May 22, 1979
Priority date	—
Expiry date	Nov 28, 1997

Classification

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

Abstract

A system and method for separating paper fibers from contaminants of lower specific gravities employ a reverse centrifugal cleaner wherein the inlet port is of substantially greater flow area than previously used or proposed for either normal or reverse centrifugal cleaning, each of the apex and base ports are of greater flow area than the inlet port, and the discharge flows are controlled to provide an accepts flow through the apex port which is less than the reject flow through the base port. The system provides substantial advantages over prior practice, particularly in the areas of both capital and operating costs, capacity, and cleaning efficiency in terms of the energy requirements for given tonnage of accepted fiber.

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