US3719276A - Sieving - Google Patents

Sieving Download PDF

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Publication number
US3719276A
US3719276A US00023393A US3719276DA US3719276A US 3719276 A US3719276 A US 3719276A US 00023393 A US00023393 A US 00023393A US 3719276D A US3719276D A US 3719276DA US 3719276 A US3719276 A US 3719276A
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US
United States
Prior art keywords
sieve
chamber
passage
air
passed
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.)
Expired - Lifetime
Application number
US00023393A
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English (en)
Inventor
R Allen
J Drane
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.)
Simon Corrugating Machinery Ltd
Original Assignee
Henry Simon Ltd
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 Henry Simon Ltd filed Critical Henry Simon Ltd
Application granted granted Critical
Publication of US3719276A publication Critical patent/US3719276A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements

Definitions

  • ABSTRACT A method of sieving characterized by the inclusion of the step of forcing a current of air through the sieve co-currently with the material being sieved, whereby to achieve an increased throughput rate of the material being sieved, and apparatus for practicing such methods.
  • a method of sieving is characterized by the inclusion of the step of forcing a current of air through the sieve co-currently with the material being sieved, whereby to achieve an increased throughput rate of the material being sieved.
  • Also according to the invention is sieving apparatus for practising the method aforesaid.
  • the apparatus comprises a chamber generally indicated at 10, provided with an inlet port 11 in its upper wall which communicates with a cuff 11a and through which stock to be sieved may be fed to the interior of the chamber.
  • the chamber is provided with outlet ports 12 and 13 at opposite sides of its lower wall which communicate with cuffs 12a and 13a providing passages which allow the overtails" and throughs" to be conveyed from the chamber respectively.
  • the stock is fed from a hopper 14 or other feed device to a duct 15 which incorporates a rotary air lock device 16 which by virtue of rotation of the vanes therein enables the stock to pass therethrough whilst preventing the direct passage of air.
  • the lower end of the duct 15 is connected with the cuff 11a by means of a foraminous and flexible sleeve 17 of canvas, for example.
  • the stock which enters the chamber 10 falls onto sieve screen 18 disposed horizontally within the chamber 10 and forming the upper surface of a subsidiary chamber 19 which is otherwise sealed from the interior of the chamber 10 by a wall 20.
  • the throughs and overtails are conveyed away through ducts 22 and 23 incorporating rotary air locks 24 and 25 similar to that 16 described hereinbefore.
  • the upper ends of the ducts 22 and 23 are connected with the cuffs 13a and 12a by flexible impervious sleeves 26 and 27 of plastics material, for example.
  • Cuff 13a, sleeve 26 and duct 22 provide a first passage for conveying through material from the chamber.
  • Cuff 12a, sleeve 27 and duct 23 provide a second passage for conveying overtail material from the chamber.
  • the air flow through the screen required by the invention may be created by compression instead of suction.
  • a method of sieving wherein fluent material to be sieved is supplied continually into chamber means containing a sieve and having two discharge outlet ports, one connected to a passage for conveying from said chamber means through material that has passed through the sieve and one connected to a passage for conveying from said chamber means overtail material that has not passed through the sieve, characterized by forcing air through the sieve co-currently with material to increase the rate of material flow through the sieve while preventing said forced air from escaping at said passages with either the through material or the overtail material.
  • Sieving apparatus comprising means whereby fluent material to be sieved is supplied through an inlet port into chamber means,a sieve in said chamber means, two discharge ports for said chamber means, means defining a first passage connected to one outlet port for conveying from the chamber means through material that has passed through the sieve and means defining a second passage connected to the other outlet port for conveying from the chamber means overtail material'that has not passed through the sieve, means for forcing air through the sieve co-currently with material to increase the rate of material flow through the sieve, and means for preventing said forced air from escaping at said passages with either the through material or the overtail material.
  • said chamber means comprises upper and lower walls defining a chamber, said sieve extending over part of the horizontal cross-section of said chamber at a position intermediate said upper and lower walls of the chamber, wall means separating that part of the chamber below said sieve from the remainder of the chamber, said inlet port being in the upper wall of the chamber means and said outlet ports being in the lower wall of said chamber.
  • each said passage defining means incorporates flexible sleeve coupling means.
  • said means for forcing air through the sieve including means for exhausting air from said first passage communicating with the discharge outlet port adapted to pass the material that has passed through the sieve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Means For Separation Of Solids (AREA)
US00023393A 1969-05-28 1970-03-27 Sieving Expired - Lifetime US3719276A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27097/69A GB1241774A (en) 1969-05-28 1969-05-28 Improvements in or relating to sieving

Publications (1)

Publication Number Publication Date
US3719276A true US3719276A (en) 1973-03-06

Family

ID=10254148

Family Applications (1)

Application Number Title Priority Date Filing Date
US00023393A Expired - Lifetime US3719276A (en) 1969-05-28 1970-03-27 Sieving

Country Status (4)

Country Link
US (1) US3719276A (fr)
CH (1) CH506341A (fr)
DE (1) DE2023124A1 (fr)
GB (1) GB1241774A (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898065A (en) * 1973-10-09 1975-08-05 Norman Dryer Co Inc Lint collector
US3929642A (en) * 1974-03-07 1975-12-30 Linatex Corp Of America Dewatering system
US4261817A (en) * 1978-05-26 1981-04-14 Philip Edwards Sieving
US4419238A (en) * 1978-04-24 1983-12-06 Lindeman (Holdings) Limited Juice drainer
US4737269A (en) * 1986-05-15 1988-04-12 Catalyst Technology, Inc. Catalyst loading hopper
US4957010A (en) * 1989-07-25 1990-09-18 W. R. Grace & Co.-Conn. Method and apparatus for determining particle size distribution
US4989464A (en) * 1989-07-25 1991-02-05 W. R. Grace & Co.-Conn. Method and apparatus for determining particle size distribution
US5352390A (en) * 1989-07-25 1994-10-04 W. R. Grace & Co.-Conn. Cementitious compositions containing shredded polystyrene aggregate
US5887726A (en) * 1996-07-30 1999-03-30 Rotex, Inc. Coupling for connecting feed spout to screening machine
US20030230541A1 (en) * 2002-06-12 2003-12-18 Derrick Mitchell J. Vibratory screening machine with suction and pressure and method for screening a slurry
US20050082236A1 (en) * 2002-06-12 2005-04-21 Derrick Corporation Vibratory screening machine with suction and method for screening a slurry
US20050133465A1 (en) * 2002-06-12 2005-06-23 Derrick Corporation Vibratory screen assembly and method of manufacture
WO2006074816A1 (fr) * 2005-01-13 2006-07-20 Basf Aktiengesellschaft Procede de calibrage d'une resine particulaire hydroabsorbante
USD597108S1 (en) * 2008-04-09 2009-07-28 Quill International Group Limited Sieving hopper for abrasive blasting apparatus
WO2014053295A1 (fr) * 2012-10-02 2014-04-10 Binder + Co Ag Dispositif et procédé de criblage de matériau de chargement polydispersé

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180470B (en) * 1985-07-16 1989-11-29 Neill Martin Joseph O Improvements in or relating to the screening of materials
NO177090C (no) * 1993-03-15 1995-07-19 Norsk Hydro As Separator for utskilling av fluidiserbare og ikke fluidiserbare materialer
WO2015176173A1 (fr) * 2014-02-20 2015-11-26 Thavaratnam Vasanthan Système et procédé de fractionnement de grains

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2047713A (en) * 1934-01-29 1936-07-14 Lowe E Simpson Conduit connecter for agitating devices
FR1177873A (fr) * 1956-06-19 1959-04-30 Ciba Geigy Dispositif et procédé de dépoussiérage des comprimés
US3010576A (en) * 1957-12-24 1961-11-28 Hauni Werke Koerber & Co Kg Apparatus for separating or winnowing tobacco and other like fibrous material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2047713A (en) * 1934-01-29 1936-07-14 Lowe E Simpson Conduit connecter for agitating devices
FR1177873A (fr) * 1956-06-19 1959-04-30 Ciba Geigy Dispositif et procédé de dépoussiérage des comprimés
US3010576A (en) * 1957-12-24 1961-11-28 Hauni Werke Koerber & Co Kg Apparatus for separating or winnowing tobacco and other like fibrous material

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898065A (en) * 1973-10-09 1975-08-05 Norman Dryer Co Inc Lint collector
US3929642A (en) * 1974-03-07 1975-12-30 Linatex Corp Of America Dewatering system
US4419238A (en) * 1978-04-24 1983-12-06 Lindeman (Holdings) Limited Juice drainer
US4261817A (en) * 1978-05-26 1981-04-14 Philip Edwards Sieving
US4737269A (en) * 1986-05-15 1988-04-12 Catalyst Technology, Inc. Catalyst loading hopper
US4957010A (en) * 1989-07-25 1990-09-18 W. R. Grace & Co.-Conn. Method and apparatus for determining particle size distribution
US4989464A (en) * 1989-07-25 1991-02-05 W. R. Grace & Co.-Conn. Method and apparatus for determining particle size distribution
US5352390A (en) * 1989-07-25 1994-10-04 W. R. Grace & Co.-Conn. Cementitious compositions containing shredded polystyrene aggregate
US5887726A (en) * 1996-07-30 1999-03-30 Rotex, Inc. Coupling for connecting feed spout to screening machine
US20030230541A1 (en) * 2002-06-12 2003-12-18 Derrick Mitchell J. Vibratory screening machine with suction and pressure and method for screening a slurry
US20050082236A1 (en) * 2002-06-12 2005-04-21 Derrick Corporation Vibratory screening machine with suction and method for screening a slurry
US20050133465A1 (en) * 2002-06-12 2005-06-23 Derrick Corporation Vibratory screen assembly and method of manufacture
WO2006074816A1 (fr) * 2005-01-13 2006-07-20 Basf Aktiengesellschaft Procede de calibrage d'une resine particulaire hydroabsorbante
US20080202987A1 (en) * 2005-01-13 2008-08-28 Basf Aktiengesellschaft Method for Grading a Particulate Water-Absorbing Resin
US8104621B2 (en) 2005-01-13 2012-01-31 Basf Aktiengesellschaft Method for grading a particulate water-absorbing resin
CN101102854B (zh) * 2005-01-13 2013-04-17 巴斯夫股份有限公司 分级颗粒状吸水树脂的方法及其所用筛分设备
USD597108S1 (en) * 2008-04-09 2009-07-28 Quill International Group Limited Sieving hopper for abrasive blasting apparatus
WO2014053295A1 (fr) * 2012-10-02 2014-04-10 Binder + Co Ag Dispositif et procédé de criblage de matériau de chargement polydispersé

Also Published As

Publication number Publication date
CH506341A (fr) 1971-04-30
DE2023124A1 (de) 1970-12-03
GB1241774A (en) 1971-08-04

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