GB2001368A - Shive ratio analyzer - Google Patents

Shive ratio analyzer

Info

Publication number
GB2001368A
GB2001368A GB787828604A GB7828604A GB2001368A GB 2001368 A GB2001368 A GB 2001368A GB 787828604 A GB787828604 A GB 787828604A GB 7828604 A GB7828604 A GB 7828604A GB 2001368 A GB2001368 A GB 2001368A
Authority
GB
United Kingdom
Prior art keywords
shive
fiber
pulses
particles
pulse
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
GB787828604A
Other versions
GB2001368B (en
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.)
Westvaco Corp
Original Assignee
Westvaco Corp
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 Westvaco Corp filed Critical Westvaco Corp
Publication of GB2001368A publication Critical patent/GB2001368A/en
Application granted granted Critical
Publication of GB2001368B publication Critical patent/GB2001368B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
    • G01N1/2035—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Optical Measuring Cells (AREA)
  • Paper (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

Relative shive incidence in a production flow line 10 of paper stock is continuously sampled and measured by means of a continuous flow, fiber induction device 13-18 located within the production line to extract a diluted sample of fiber flow therein by means of a jet of water across a gap 18. The diluted sample is directed through a windowed conduit section 20 for photodetection of particles therein. Particle caused pulses are discriminated by amplitude relative to a reference scale to distinguish shive particles from acceptable fiber particles. Two pulse trains are developed simultaneously: one pulse train for shive pulses and the other pulse train for total particle flow including shives. Both pulse trains are rate determined by counting the number of pulses in a fixed interim of time identical to both. The two pulse rates are then combined to develop a dimensionless ratio of shive incidence or percentage within the total fiber stream. <IMAGE>
GB787828604A 1977-07-01 1978-07-03 Shive ratio analyser Expired GB2001368B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81205677A 1977-07-01 1977-07-01

Publications (2)

Publication Number Publication Date
GB2001368A true GB2001368A (en) 1979-01-31
GB2001368B GB2001368B (en) 1982-12-08

Family

ID=25208365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB787828604A Expired GB2001368B (en) 1977-07-01 1978-07-03 Shive ratio analyser

Country Status (7)

Country Link
JP (1) JPS5440692A (en)
CA (1) CA1095738A (en)
DE (1) DE2828843C2 (en)
FI (1) FI782089A (en)
GB (1) GB2001368B (en)
NO (1) NO782284L (en)
SE (1) SE7807410L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276119A (en) * 1979-05-14 1981-06-30 Domtar Inc. Method and apparatus for on-line monitoring of specific surface of mechanical pulps
US4441960A (en) * 1979-05-14 1984-04-10 Alkibiadis Karnis Method and apparatus for on-line monitoring of specific surface of mechanical pulps
JP2928056B2 (en) * 1993-06-28 1999-07-28 相川鉄工株式会社 Pulp suspension foreign matter detection method and pulp suspension foreign matter detection device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3461030A (en) * 1965-10-22 1969-08-12 Beloit Corp Determination of fiber characteristics in paper making

Also Published As

Publication number Publication date
JPS5440692A (en) 1979-03-30
GB2001368B (en) 1982-12-08
NO782284L (en) 1979-01-03
FI782089A (en) 1979-01-02
CA1095738A (en) 1981-02-17
SE7807410L (en) 1979-01-02
DE2828843A1 (en) 1979-01-25
DE2828843C2 (en) 1982-01-21

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee