US3608719A - Self-supporting screens for stone, ore and like material - Google Patents

Self-supporting screens for stone, ore and like material Download PDF

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Publication number
US3608719A
US3608719A US806242A US3608719DA US3608719A US 3608719 A US3608719 A US 3608719A US 806242 A US806242 A US 806242A US 3608719D A US3608719D A US 3608719DA US 3608719 A US3608719 A US 3608719A
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US
United States
Prior art keywords
bars
screen
pairs
elongated
parallel
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
US806242A
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English (en)
Inventor
Bengt Lars Arne Dehlen
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.)
Trelleborgs Gummifabriks AB
Original Assignee
Trelleborgs Gummifabriks AB
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 Trelleborgs Gummifabriks AB filed Critical Trelleborgs Gummifabriks AB
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Publication of US3608719A publication Critical patent/US3608719A/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
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4636—Regulation of screen apertures
    • 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
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/48—Stretching devices for screens

Definitions

  • the rods are coated with a wear-resistant natural or synthetic rubber, and at least the bars in one rod set are reinforced to impart self-supporting ability to the screen.
  • the bar sets have cooperating ridges and toothlike projections to fix the positions of the bars in the two bar sets in relation to each other. One bar set may then be displaced with respect to the other bar set utilizing the cooperating ridges and projections to provide a screen having apertures of adjustable size.
  • the present invention has for its purpose to provide a screen for stone, ore and like material, which is self-supporting and permits varying the dimensions of the screen apertures without necessitating exchange of any part of the screen, and which also allows a far-reaching standardization of the individual elements of the screen, without it being necessary to waive the possibilities of varying the construction of the screen in accordance with particular desired service conditions and without being tied to the originally selected particular dimensioning of the screen and the screen apertures.
  • This and other objects are attained according to the invention by composing the screen of bars whose surfaces contacting the material to be screened are made of wear-resistant natural or synthetic rubber.
  • Characteristics of the screen is that it comprises two crossed sets of bars, the bars of at least one set being provided with a reinforcement imparting self-supporting ability to the screen, the bars of said crossed sets having interengaging projections serving to fix the positions of the crossed bars in relation to each other and being forcelockingly interconnected under formation of a screen lattice.
  • HO. 1 is a top plan view of part of the screen and the screen frame;
  • F 10. 2 is a section on line llll in FIG. 1;
  • H6. 3 is a section on line Ill-III in FIG. 1;
  • FIG. 4 is a bottom plan view of part of a rod in said screen.
  • the screen illustrated in the drawings comprises two crossed sets of bars 11, 12 and 13, 14.
  • the bars 11, 12 of one set are arranged in pairs opposite each other on either side of the rods 13, 14 of the other set.
  • the bars 11 are a composite of a C-shaped elongated, reinforced cavity 15, having interior abutment surfaces 16, and a wear-resistant rubber coating 17 which surrounds the outside surfaces of elongated cavity 15. Additionally, the bars 11 are provided at their downwardly directed-side with projections or teeth 18 which are integral with the other parts of the wear-resistant rubber layer 17. By reason of this design the bars 11 will be in the form of racks.
  • the rods 12 also belonging to the bars of the first set are made from two angle bars 19, which are interconnected by means of wear resistant rubber 21.
  • the composite bar 12 thus consists of an elongated C- shaped cavity made of angle brackets 19 and 20 and a rubber coating 21. disposed on and holding together the cavity.
  • this wear-resistant rubber on the outer side of the angle rods i.e. the upper side of the rods 12
  • the wearresistant rubber 21 has elongated through holes 23, and a recess is provided in the wear-resistant rubber around each of said holes so that the angle rods 19, 20 will have free surface portions 24 serving as abutment surfaces.
  • crossing bars 13 are formed from wear-resistant rubber without any reinforcement, but these bars also may be reinforced.
  • the crossing bars 13 have longitudinal ridges 25 into which the toothlike projections 18, 22 of the bars 11 and 12 fit.
  • the spacing of the ridges 25 is selected in accordance with the division between the toothlike projections 18, 22 of the bars 11 and 12.
  • the crossing bars 14 have a reinforcement 26 which serves the purpose of rigidifying the screen and imparting self-supporting ability to it.
  • the bars 14 are provided only at the ends of the bars ll, 12, but if necessary bars 14 may also be placed at one or more other locations along the length of the bars 11, 12.
  • the bars 14 also have longitudinal ridges 25 the spacing of which has been selected in accordance with the division of the toothlike projections 18, 22 of the bars 11 and 12.
  • the bars 11-14 are interconnected to form a screen lattice with the aid of bolts 27 which have been passed into the reinforcing profile member 15 and extend downwards between the bars l3, l4 and through the holes 23 in the lower bars 12.
  • the bolts and their nuts thus tighten together the pairwise arranged bars 1 1, l2, clamping the bars 13, 14 between the rods 11, 12.
  • the division of the bolts as well as the number thereof is dependent upon the service conditions of the screen and can therefore be varied at will.
  • the size of the screen apertures in the screen can be selected according to a modulus system in which the modulus corresponds to the tooth division which may he say 10 mms.
  • the modulus corresponds to the tooth division which may he say 10 mms.
  • Fastening of the self-supporting screen can be effected in several ways, one suitable way being shown in the drawings.
  • the outermost longitudinal bars 12 of the screen rest upon an angle rod 30 secured to the sidewall 31 of the screen frame.
  • the screen rests loosely on the angle rods of the screen frame but is pressed down against said angle rods by means of a rubber profile member 32.
  • Said rubber profile member has a fastening bar 33 vulcanized thereinto for enabling anchoring of the bar by means of bolts 34 in longitudinal holes in the sidewall 31 of the screen frame. in use the screen is thus mounted with the rods 11 and 12 in the screening direction which is designated by an arrow in FIG. 3.
  • the screen according to the present invention may be mounted in a continuous sequence in the screen frame, either in abutting end-to-end application or at successively lower levels in the screening direction.
  • the screen according to the present invention may be mounted in a continuous sequence in the screen frame, either in abutting end-to-end application or at successively lower levels in the screening direction.
  • the bars 12 have been made more slender than the bars 11 so that the material being screened contacts the bars 12 to the least possible extent. Should itprove necessary, however, the reinforcing elements 19, 20 of the bars 12 can be provided with a layer of wear-resistant rubber also at the outer side.
  • a screen for sorting stone, ore, and the like material, having apertures which are adjustable in size, comprising:
  • each parallel bar of said plurality of pairs of parallel bars including an elongated C-shaped cavity
  • detachable clamping means extending between the C- shaped cavities of the respective bars of pairs of said plurality of pairs of parallel bars for clamping the plurality of pairs of parallel bars to the crossing bars
  • each of said bars of said plurality of pairs of parallel bars having a plurality of toothlike projections which extend in the direction of said plurality of crossing bars
  • each of said crossing bars having two sets of a plurality of ridges, each set extending in the direction of a respective bar of a pair of bars of said plurality of pairs of parallel bars, said ridges being spaced to engage said toothlike projections, whereby the position of said crossing bars may be adjusted relative to the position of said parallel bars and the relative size of the apertures of the screen may be controlled.
  • each parallel bar of said plurality of pairs of elongated parallel bars further includes an elongated coating of a wear-resistant material arranged to coat said C-shaped elongated cavity, and wherein said elongated crossing bars are comprised of a wear-resistant material.
  • said detachable clamping means are bolts having a bolt head at one bolt end and a nut at the other bolt end, said bolt head and nut being shaped to fit into and engage said C-shaped elongated cavities.

Landscapes

  • Combined Means For Separation Of Solids (AREA)
US806242A 1968-03-14 1969-03-11 Self-supporting screens for stone, ore and like material Expired - Lifetime US3608719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE3351/68A SE306508B (fi) 1968-03-14 1968-03-14

Publications (1)

Publication Number Publication Date
US3608719A true US3608719A (en) 1971-09-28

Family

ID=20261935

Family Applications (1)

Application Number Title Priority Date Filing Date
US806242A Expired - Lifetime US3608719A (en) 1968-03-14 1969-03-11 Self-supporting screens for stone, ore and like material

Country Status (9)

Country Link
US (1) US3608719A (fi)
AU (1) AU5178369A (fi)
DE (1) DE1912519A1 (fi)
DK (1) DK123508B (fi)
FI (1) FI43374B (fi)
FR (1) FR2003924A1 (fi)
GB (1) GB1195969A (fi)
NO (1) NO119524B (fi)
SE (1) SE306508B (fi)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4361239A (en) * 1980-02-04 1982-11-30 Kumandan Krishna R Size grader for pod vegetables
US20080087581A1 (en) * 2004-11-09 2008-04-17 Buhler Ag Device For Separating Granular Material
US20080190821A1 (en) * 2005-04-27 2008-08-14 Buehler Ag Method and Device for Cleaning Cereals
US20080264832A1 (en) * 2004-12-23 2008-10-30 Lars Gronvall Rider Bar for Screening Element or Wear-Resistant Lining
CN102430514A (zh) * 2011-09-14 2012-05-02 北京绿色能量科技有限公司 过滤装置及餐厨垃圾分离车
CN109351593A (zh) * 2018-09-03 2019-02-19 安徽屹翔滤材有限公司 一种组合式拼装的防挂毛筛板

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1138600B (it) * 1981-09-14 1986-09-17 Eurodomestici Ind Riunite Perfezionamenti relativi alle macchine lavabiancheria
ATE70864T1 (de) * 1985-10-03 1992-01-15 Miele & Cie Waschmaschine oder waschtrockner mit einrichtungen zur vermeidung von waschmittelverlusten.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB269877A (en) * 1926-04-23 1928-04-19 Hermann Schubert Improvements in sifting apparatus
US2837210A (en) * 1949-06-27 1958-06-03 Ackert Rudolf Oscillating sieves, screens or the like
US3134733A (en) * 1961-01-09 1964-05-26 Bixby Zimmer Engineering Compa Screens
US3229919A (en) * 1962-06-15 1966-01-18 Pettibone Mulliken Corp Crusher with variable opening screen grate

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB269877A (en) * 1926-04-23 1928-04-19 Hermann Schubert Improvements in sifting apparatus
US2837210A (en) * 1949-06-27 1958-06-03 Ackert Rudolf Oscillating sieves, screens or the like
US3134733A (en) * 1961-01-09 1964-05-26 Bixby Zimmer Engineering Compa Screens
US3229919A (en) * 1962-06-15 1966-01-18 Pettibone Mulliken Corp Crusher with variable opening screen grate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4361239A (en) * 1980-02-04 1982-11-30 Kumandan Krishna R Size grader for pod vegetables
US20080087581A1 (en) * 2004-11-09 2008-04-17 Buhler Ag Device For Separating Granular Material
US20080264832A1 (en) * 2004-12-23 2008-10-30 Lars Gronvall Rider Bar for Screening Element or Wear-Resistant Lining
US8281933B2 (en) * 2004-12-23 2012-10-09 Metso Minerals (Wear Protection) Ab Rider bar for screening element or wear-resistant lining
US20080190821A1 (en) * 2005-04-27 2008-08-14 Buehler Ag Method and Device for Cleaning Cereals
CN102430514A (zh) * 2011-09-14 2012-05-02 北京绿色能量科技有限公司 过滤装置及餐厨垃圾分离车
CN102430514B (zh) * 2011-09-14 2013-07-31 北京绿色能量科技有限公司 过滤装置及餐厨垃圾分离车
CN109351593A (zh) * 2018-09-03 2019-02-19 安徽屹翔滤材有限公司 一种组合式拼装的防挂毛筛板

Also Published As

Publication number Publication date
SE306508B (fi) 1968-12-02
DK123508B (da) 1972-07-03
GB1195969A (en) 1970-06-24
FR2003924A1 (fi) 1969-11-14
DE1912519A1 (de) 1969-11-20
AU5178369A (en) 1970-09-17
NO119524B (fi) 1970-06-01
FI43374B (fi) 1970-11-30

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