US3412860A - Sieve frames - Google Patents

Sieve frames Download PDF

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Publication number
US3412860A
US3412860A US538329A US53832966A US3412860A US 3412860 A US3412860 A US 3412860A US 538329 A US538329 A US 538329A US 53832966 A US53832966 A US 53832966A US 3412860 A US3412860 A US 3412860A
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US
United States
Prior art keywords
frame
sieve
members
cross
metal
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
US538329A
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English (en)
Inventor
Bingham John Dudley
Higgs Ernest William
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 US3412860A publication Critical patent/US3412860A/en
Anticipated expiration legal-status Critical
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
    • B07B1/48—Stretching devices for screens

Definitions

  • This invention relates to sieve frames.
  • the inner surfaces of the frame walls and the side surfaces of any cross-bracing members shall be of a nature which will resist erosion wear due to multiple impacts by known kinds of free-roving sieve-cleaning members, arranged to pass in a random manner across the underside of the screen to prevent the blinding thereof.
  • An object of this invention is to provide improved interchangeable sieve screen service frames which satisfy these requirements.
  • an interchangeable sieve screen service frame comprises, a square or rectangular sieve screen, a four-sided open nonmetallic frame of slender proportions to the upper edges of the walls of which the edges of the screen are fixed, and a rigid crossbraced metal frame arranged to fit into and support the slender open nonmetallic frame from within and from below in such manner that the bending and twisting loads applied to the nonmetallic frame as a result of the tension forces affecting the screen are transmitted by the walls of the nonmetallic frame to the metal frame elements which support them.
  • the rigid cross-braced metal frame is a four-sided unit having its opposite side members parallel and at right angles to adjacent side members, the said side members being substantially of L- shaped cross-section with the vertical flanges of all sides towards the inside of the frame and with the horizontal flanges of all sides on a common plane, and there being two cross brace members of substantially the same effective height and effective thickness as the vertical flanges of the L-shaped members, which cross-brace members are 3,412,869 Patented Nov.
  • the open nonmetallic frame is four-sided with opposite sides parallel and at right angles to adjacent sides, the cross-section of the side members being rectangular and of such height and breadth that when nested into the corner of the cross-section of the metal frame sides, the upper face and the outer side face of the nonmetallic frame member are both flush with the edges of the adjacent metal flanges.
  • Each said frame side member has a horizontal mortice slot at one of its end extremities and a matching horizontal tenon at its other end extremity so that when the four sides are assembled together the morticed joints at the corners of the frame serve to lock all members together on a common plane.
  • FIGURE 1 is a plan view of a sieve frame according to the invention
  • FIGURE 2 is a side elevation in cross-section about the line AA of the sieve frame shown in FIGURE 1,
  • FIGURE 3 is an enlarged cross-sectional view of any one side of the sieve frame
  • FIGURE 4 is an enlarged isometric view of a corner of the sieve frame.
  • the interchangeable sieve screen service frame shown comprises a square sieve screen 1 which is fixed along its edges to the top surface of a slender open nonmetallic frame 2 that is supported along the full lengths of all four of its sides by an open rigid cross-braced metal frame 3 the four sides of which are at right-angles to adjacent sides and are substantially L-shaped in cross-section, the said sides being arranged with their vertical flanges 4 towards the inside of the frame and their horizontal flanges 5 on a common plane.
  • each side of the metal frame 3 there is a downwardly turned lip 6 which provides that in the underside of the frame formed by the said sides there is a shallow recess 7 in which a bottom closure wire-grid 8 can be housed.
  • each crossbrace member 9 Joining opposite sides of the metal frame and rigidly fixed to the vertical flanges 4 thereof at positions midway along the flange lengths and with their top and bottom extremities flush with those of the said vertical flanges are two cross-brace members 9 which are rigidly joined together at rightangles at the geometric centre of the frame, each crossbrace member being of the same effective height and effective thickness as the said vertical flanges 4 and comprising a metal lower part -10 and an upper resilient part 11 which fits into a longitudinal slot 12 of the lower metal part 10 in such manner as to constitute a cushion between the underside of the sieve screen 1 and the top edge of the said metal part.
  • the nonmetallic frame 2 is made of wood and comprises four side members 13, each of which in cross-section is rectangular and of such height and breadth that, when nested into the corner between the vertical and horizontal flanges 4 and 5 of the associated side of the metal frame 3, the upper face and the outer side face of the wooden frame member are both flush with the edges of the adjacent metal flanges.
  • the said members are locked on a common plane and lie snugly against the surfaces of the metal frame flanges.
  • Fixing screws 16 are provided to lock together the wooden frame 2, the horizontal flanges 5 of the sides of the metal frame 3, and a bottom closure wire-grid 8 arranged to seat in the recess of the metal frame and encage at least one free-roving sieve-cleaning member 17 of known kind in each of the four sieve sections formed by the cross-bracing members 9.
  • the rigid cross-braced metal frame is arranged with its horizontal flanges downwards, and the nonmetallic frame side members are nested into the metal frame side members with the morticed joints at the corners of the nonmetallic frame engaged; then a screen to which the appropriate stretching tension is applied is brought into engagement with the upper surfaces of the composite frame walls, and is fixed to the upper surface of the nonmetallic frame by staples, or by staples and a suitable adhesive medium, or by other equivalent means. Thereafter the tension forces affecting the screen will hold the side members of the nonmetallic frame in intimate engagement with the vertical flanges of the side members of the rigid cross-braced metal frame.
  • the composite frame is then turned over, sieve-cleaning members are placed in each of the four sieve sections, the Wire-grid 8 is located in its retaining recess 7 and fixing screws 16 are threaded through mesh openings in the wire-grid and through prepared holes in the flanges of the metal frame and are driven into the side members of the non-metallic frame to lock all frame parts solidly together.
  • a sieve screen service frame for any of a plurality of substantially identical sieve supporting frameworks of a sieving machine, comprising, a square or rectangular sieve screen, a four sided open nonmetallic frame to the upper edges of which the edges of the screen are fixed, and a rigid cross-braced metal frame whereof the side members are of substantially L-shaped cross-section with the vertical flanges of all sides towards the inside of the frame and the horizontal flanges of all sides on a common plane which metal frame is arranged to fit into and support the open nonmetallie frame from within and from below in such manner that the bending and twisting loads applied to the nonmetallic frame as a result of the tension forces affecting the screen are transmitted by the side members of the nonmetallic frame to the metal frame elements which support them, characterised in that the corner joints of the nonmetallic frame are self-aligning morticed joints which serve to locate all side members of the nonmetallic frame on a common plane and in intimate contact with associated vertical flanges of the metal frame which side members are
  • a sieve screen service frame according to claim 1, wherein the rigid cross-braced metal frame has those surfaces of the vertical flanges of its L-shaped side members that are remote from the non-metallic frame so sloped that the vertical flanges are thicker at the bottom than at the top, and there being two cross-brace members joining opposite sides of the said metal frame and being rigidly fixed to the vertical flanges of the frame side members at positions midway along the flange lengths and with their top and bottom extremities flush with those of the said flanges the said cross-lbrace members being rigidly joined together at right angles at the geometric centre of the frame and each crossbrace member being of the same effective height and effective thickness as the said vertical flanges and comprising a metal lower part and an upper resilient part which fits into a longitudinal slot in the lower metal part in such manner as to constitute a cushion between the underside of the sieve screen and the top edge of the said metal part.
  • a sieve screen service frame according to claim 1 wherein means which positively lock the nonmetallic frame to the metal frame also serve to fix to the metal frame a bottom closure Wire-grid which encages within the confines of the metal frame such free-roving cleaning members as are required to prevent the blinding of the sieve screen when in use.

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  • Combined Means For Separation Of Solids (AREA)
US538329A 1965-03-31 1966-03-29 Sieve frames Expired - Lifetime US3412860A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13585/65A GB1122665A (en) 1965-03-31 1965-03-31 Improvements in sieve frames

Publications (1)

Publication Number Publication Date
US3412860A true US3412860A (en) 1968-11-26

Family

ID=10025653

Family Applications (1)

Application Number Title Priority Date Filing Date
US538329A Expired - Lifetime US3412860A (en) 1965-03-31 1966-03-29 Sieve frames

Country Status (3)

Country Link
US (1) US3412860A (fr)
CH (1) CH438896A (fr)
GB (1) GB1122665A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364118B1 (en) * 1999-08-18 2002-04-02 Allgaier Werke Gmbh Sieve insert for a cylinder sieve machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2153402C2 (ru) * 1996-03-20 2000-07-27 Горшков Владимир Александрович Устройство для рассеивания сыпучих материалов по фракциям

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US146065A (en) * 1873-12-30 Improvement in chairs
US758907A (en) * 1903-07-15 1904-05-03 John Fraser Sieve bolting-machine.
US2042072A (en) * 1932-06-21 1936-05-26 Robins Conveying Belt Co Screening apparatus
US2114406A (en) * 1936-05-12 1938-04-19 Lowe E Simpson Sieve frame
US2181605A (en) * 1936-10-21 1939-11-28 William E Norvell Separable sieve for bolters
US2345947A (en) * 1942-03-05 1944-04-04 Tyler Co W S Screening apparatus
FR1080684A (fr) * 1953-04-17 1954-12-13 Perfectionnements aux cadres d'impression sur étoffes et analogues

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US146065A (en) * 1873-12-30 Improvement in chairs
US758907A (en) * 1903-07-15 1904-05-03 John Fraser Sieve bolting-machine.
US2042072A (en) * 1932-06-21 1936-05-26 Robins Conveying Belt Co Screening apparatus
US2114406A (en) * 1936-05-12 1938-04-19 Lowe E Simpson Sieve frame
US2181605A (en) * 1936-10-21 1939-11-28 William E Norvell Separable sieve for bolters
US2345947A (en) * 1942-03-05 1944-04-04 Tyler Co W S Screening apparatus
FR1080684A (fr) * 1953-04-17 1954-12-13 Perfectionnements aux cadres d'impression sur étoffes et analogues

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364118B1 (en) * 1999-08-18 2002-04-02 Allgaier Werke Gmbh Sieve insert for a cylinder sieve machine

Also Published As

Publication number Publication date
GB1122665A (en) 1968-08-07
CH438896A (fr) 1967-06-30

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