EP0936303A3 - Expanded flow range edge flow control valve for use in a paper machine headbox - Google Patents

Expanded flow range edge flow control valve for use in a paper machine headbox Download PDF

Info

Publication number
EP0936303A3
EP0936303A3 EP99630015A EP99630015A EP0936303A3 EP 0936303 A3 EP0936303 A3 EP 0936303A3 EP 99630015 A EP99630015 A EP 99630015A EP 99630015 A EP99630015 A EP 99630015A EP 0936303 A3 EP0936303 A3 EP 0936303A3
Authority
EP
European Patent Office
Prior art keywords
flow
edge
chamfer
headbox
control valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99630015A
Other languages
German (de)
French (fr)
Other versions
EP0936303A2 (en
EP0936303B1 (en
Inventor
Eugene Bruce Neill
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beloit Technologies Inc
Original Assignee
Beloit Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beloit Technologies Inc filed Critical Beloit Technologies Inc
Publication of EP0936303A2 publication Critical patent/EP0936303A2/en
Publication of EP0936303A3 publication Critical patent/EP0936303A3/en
Application granted granted Critical
Publication of EP0936303B1 publication Critical patent/EP0936303B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00Wet end of machines for making continuous webs of paper
    • D21F1/02Head boxes of Fourdrinier machines
    • D21F1/026Details of the turbulence section
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00Wet end of machines for making continuous webs of paper
    • D21F1/02Head boxes of Fourdrinier machines
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00Wet end of machines for making continuous webs of paper
    • D21F1/02Head boxes of Fourdrinier machines
    • D21F1/028Details of the nozzle section
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00Wet end of machines for making continuous webs of paper
    • D21F1/06Regulating pulp flow

Abstract

Edge flow control valves located within edge flow tubes of a tube bank in a headbox can be adjusted to optimize fiber orientation of paper produced in a papermaking process. The present invention uses a chamfer at the inlet of edge flow tubes in order to increase maximum flow of pulp through the edge tube and edge valve. The minimum flow range is not changed, therefore, the essential flow range of pulp through the edge flow valve is increased. Laboratory tests have shown at least a 15 percent increase in maximum flow while not changing the minimum flow. Using a chamfer tool with a stop collar to control the depth of the cut, a chamfer is provided at the inlet of each edge flow tube for optimum performance. According to the present invention, paper produced in a papermaking process will have an improved fiber orientation when more flow at the edges of a headbox is needed.
EP99630015A 1998-02-10 1999-02-05 Expanded flow range edge flow control valve for use in a paper machine headbox Expired - Lifetime EP0936303B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2124698A 1998-02-10 1998-02-10
US21246 1998-02-10

Publications (3)

Publication Number Publication Date
EP0936303A2 EP0936303A2 (en) 1999-08-18
EP0936303A3 true EP0936303A3 (en) 2000-08-02
EP0936303B1 EP0936303B1 (en) 2007-04-04

Family

ID=21803163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99630015A Expired - Lifetime EP0936303B1 (en) 1998-02-10 1999-02-05 Expanded flow range edge flow control valve for use in a paper machine headbox

Country Status (7)

Country Link
EP (1) EP0936303B1 (en)
JP (1) JP3170713B2 (en)
KR (1) KR100538115B1 (en)
BR (1) BR9900556A (en)
CA (1) CA2260725C (en)
DE (1) DE69935684T2 (en)
ID (1) ID23563A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008269A1 (en) * 2005-02-22 2006-08-24 Voith Paper Patent Gmbh Turbulence generator for a headbox
JP4913510B2 (en) * 2006-09-05 2012-04-11 横河電機株式会社 Simulation method, fiber orientation control method, and fiber orientation control device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016033A (en) * 1975-03-01 1977-04-05 J. M. Voith Gmbh Distribution means for aqueous slurry in papermaking machines
US4687548A (en) * 1984-10-31 1987-08-18 Valmet Oy Method and apparatus for controlling distortion of fibre orientation in a paper web
US5147509A (en) * 1990-06-25 1992-09-15 Beloit Corporation Headbox for a papermaking machine with distribution tubes
EP0595325A1 (en) * 1992-10-29 1994-05-04 Mitsubishi Jukogyo Kabushiki Kaisha End portion flow rate regulating apparatus for a paper machine headbox

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016033A (en) * 1975-03-01 1977-04-05 J. M. Voith Gmbh Distribution means for aqueous slurry in papermaking machines
US4687548A (en) * 1984-10-31 1987-08-18 Valmet Oy Method and apparatus for controlling distortion of fibre orientation in a paper web
US5147509A (en) * 1990-06-25 1992-09-15 Beloit Corporation Headbox for a papermaking machine with distribution tubes
EP0595325A1 (en) * 1992-10-29 1994-05-04 Mitsubishi Jukogyo Kabushiki Kaisha End portion flow rate regulating apparatus for a paper machine headbox

Also Published As

Publication number Publication date
ID23563A (en) 2000-05-04
EP0936303A2 (en) 1999-08-18
JP3170713B2 (en) 2001-05-28
CA2260725C (en) 2006-06-27
EP0936303B1 (en) 2007-04-04
KR19990072503A (en) 1999-09-27
JPH11279973A (en) 1999-10-12
BR9900556A (en) 2000-01-04
DE69935684D1 (en) 2007-05-16
DE69935684T2 (en) 2008-08-21
KR100538115B1 (en) 2005-12-22
CA2260725A1 (en) 1999-08-10

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