US2511239A - Screen cloth anchoring and tensioning means - Google Patents

Screen cloth anchoring and tensioning means Download PDF

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Publication number
US2511239A
US2511239A US721686A US72168647A US2511239A US 2511239 A US2511239 A US 2511239A US 721686 A US721686 A US 721686A US 72168647 A US72168647 A US 72168647A US 2511239 A US2511239 A US 2511239A
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United States
Prior art keywords
screen
frame
screen cloth
end
strip
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Expired - Lifetime
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US721686A
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George W Behnke
Russell G Westcott
Sandula John
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Simplicity Engineering Co
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Simplicity Engineering Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPERATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, OR SIFTING OR BY USING GAS CURRENTS; OTHER SEPARATING BY DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/48Stretching devices for screens
    • B07B1/49Stretching devices for screens stretching more than one screen or screen section by the same or different stretching means

Description

G. W. BEHNKE ET AL SCREEN CLOTH ANCHORING AND TENSIONING MEANS June 13, 1950 3 Sheets-Sheet 1 Filed Jan. 13, 1947 INVENTORJ 6mm ATTORNEY June 1950 e. w. BEHNKE ET AL SCREEN CLOTH ANCHORING AND TENSIONING MEANS 3 Sheets-Sheet 2 Filed Jan. 15, 1947 INVENTORS a Mm.

A TTOR/VEY June 13, 1950 w, BEHNKE ET AL 2,511,239

SCREEN CLOTH ANCHORING AND TENSIONING MEANS Filed Jan. 13, 1947 3 Sheets-Sheet 5 A T TORNE) Patented June 13, 1950 SCREEN CLOTH AN CHORING AND TENSIONING MEANS George W. Behnke, Russell G. Westcott, and John Sandula, Durand, Mich., assignors to Simplicity Engineering Company, Durand, Mich.

Application January 13, 1947, Serial No. 721,686

3 Claims.

This invention relates to screen anchoring and tensioning means for screening machines, and more particularly to a screening machine for screening fine food products and similar materials.

One of the prime objects of the invention is to design means for anchoring screen cloth of very fine mesh to the screen trays or frames, and without the use of bolts, rivets, or any other securing means Which would necessitate providing openings in the cloth.

Screen cloth of the nature described is capable of withstanding, for a considerable period of time, the severe stretch and. strains necessary when used for screening fine materials of all kinds, but when the cloth is once ruptured by insertion of a bolt, rivet, welding, or any other means, it readily runs and tears, making replacement necessary with the resultant loss in time, materials and eificiency.

It is, therefore, one of the salient objects of the invention to provide means engageable with the end sections of each screen strip, for uniformly and evenly gripping and anchoring the screen cloth at its ends, and to also provide means for continuously and automatically tensioning the cloth.

Another object is to provide easily and quickly removable and insertable means, uniformly and evenly engageable over the entire width of the end section of each screen cloth strip for clamping a relatively large area of each section of said strip.

A further object is to provide simple, practical, and inexpensive means whereby the screen tension may be easily and quickly adjusted and held.

To the accomplishment of the foregoing and related ends, said invention then consists of the means hereinafter fully described and particularly pointed out in the appended claims, the annexed drawings and following description se ting forth, in detail, eertain means and one mode of carrying out the invention, such disclosed means and mode illustrating, however, but one of various ways in which the principle of the invention may be used.

In the drawings:

Fig. 1 is an isometric view of a screening apparatus showing a plurality of screen trays arranged in superimposed relation thereon.

Fig. 2 is an enlarged, isometric view showing a strip of screen cloth with the take-up bar and lock strip in position.

Fig. 3 is an enlarged, perspective view of the front take-up bar.

Fig. 4 is an enlarged, fragmentary, side-elevational view illustrating the tray frame and spring take-up means.

Fig. 5 is a fragmentary, s-ide-elevational, diagrammatic view showing the take-up bar and lock stri rolled over from the position shown in Fig. 2.

Fig. 6 is a fragmentary, plan view of one of the tray frames, and

Fig. '7 is a side-elevational view thereof with the screen cloth in position thereon.

Referring now more specifically to the drawings in which we have shown one embodiment of our invention: The numeral l0 indicates a fabricated structural frame havin bearings ll mounted thereon intermediate its length, an eccentric or gyrating shaft 12 being journaled in said bearings in the usual manner, and as fully described in Patent No. 2,311,814, granted to us under date of February 23, 1943.

This frame In may be mounted on a suitable foundation, or it may be suspended from overhead supports (not shown), if desired, suitable brackets l3 being provided on the corners of the frame to facilitate such suspension.

A gyratory frame G is mounted on the eccentric shaft l2 and is operable thereby, resilient corner supports B. being attached to the gymtory frame and to the main frame Ill for yieldingly resisting movement thereof out of its normally balanced state, and for maintaining it in proper screening position, irrespective of load distribution and without in any manner interfering with the gyratory movement of the frame.

A plurality of individual tray members T are mounted on the gyratory frame G in superimposed relation, and a sheet metal cover C fits over the uppermost tray, said cover being formed with an intake spout l4 through which the material to be Screened is fed to the machine.

Vertically disposed rods l5 are hingedly connected to brackets 16 provided on the side walls of the gyratory frame by means of bolts l1, the upper threaded end of each rod extending through a slotted opening it formed in the brackets l9 provided on the side walls of the cover, and hand nuts 20 ar threaded on the upper threaded ends of the rods for rigidly securing the trays in assembled relation.

Each tray frame includes side bars 2| and a plurality of transversely disposed cross bars 22 which are welded together so that th screen contacting areas are smooth and clean.

A cross bar 23 spans the front end of the frame, said bar being reversely bent to form an overhanging lip 24, the opposite end of said frame having a laterally projecting apron section A, the side walls 25 of which project above and below the main frame, and a curved lip 26 forms a part of said apron, said lip extending flush with the top of the frame, while the bottom wall forms a pan into which the material is discharged from the screen.

In the application of the screen cloth S to the tray, it is essential that the screen cloth b cut absolutely square; it is then placed on a suitable frame, and each section is folded under as shown in Fig. 2 of the drawings, after which an elongated, smooth lock strip or bar 28 is inserted in each fold, and this fold with the lock strip in position, is then placed in th channel 29 formed in the rear take-up bar B.

The take-up bar is then rolled over onto its reverse side (see Fig. of the drawings), and when tension is exerted on the strip, the screen cloth will be firmly locked in position, the cloth being wrapped around the lock strip withthe fre end of the cloth overlying the end of the take-up bar so that the main body of the screen is stretched thereover, and does not come in direct contact with th edge of the screen frame.

With the screen cloth bottom face up, we then insert the feed end of the lock strip and folded screen cloth into the metal channel or groove 24 provided on the front feed end of the frame; with the screen cloth in this position we lay the remaining cloth on the frame top sid up, and the take-up bar B is then in position for attachment at the discharge end of the frame; we then attach the turned lip section 30 of the take-up bar to the turned ends 3| of the tensioning members.

The tensioning means comprises a transversely disposed, preferably square shaft 32 which spans the apron A and projects through the side walls 25 thereof, a plurality or upwardly curved spring members 33 being rigidly mounted thereon in spaced-apart relation, and th ends 3| of said springs being hook-shaped for easy engagement with the folded reversely bent lip section 39 of the take-up bar.

The ends of the shaft 32 are turned and threaded as at 34, these ends projecting through the side walls 25 of the apron A, and nuts 35 serve to secure the shaft in set position.

When the screen S is placed on the frame, the turned ends SI of the springs 33 engage the turned lip 39 of the take-up bar B, and when it is desired to tension the screen, the shaft 32 is turned clockwise to bring the screen to desired tension, and

it is there held until such time as it is desired to again tighten or remove the screen.

The manner of connecting the ends of the screen is of prime importance because of the nature of the cloth, as hereinbefore stated; it is capable of considerable tension and wear excepting when the strands are shifted or broken to provide bolt or rivet holes, or when stretched over sharp edges, and in our method of anchoring, such disadvantages are eliminated, all contacting corners are rounded, the strain is evenly distributed over the entire width of the cloth, and in addition, the greater the pull, the tighter the screen cloth grips the lock strip, so that the bearing on the free ends of the screen and frame is also enhanced.

The tensioning adjustment is extremely simple and easy to make, because the spring members 33 are resilient, the lock strip extends the entire width of the cloth, so there can be no blind spots or areas on the screen.

From the foregoing description, it will be obvious that we have perfected a very simple, practical, and effective screen cloth anchoring and tensioning means for screening machines and the like.

What we claim is:

1. In a screening apparatus, the combination of a frame having a transversely disposed, hookshaped section at the front end thereof, and a transversely-disposed apron-shaped section at the rear end, said apron being formed with vertical, end and bottom walls, a transverse, horizontally disposed, downwardly curved lip formed integral with the vertical wall and in alignment with and forming an extension of the top of the frame, a screen strip spanning said frame from end-to-end, take-up bars at the opposite ends of the screen strip and formed with opposed, hookshaped upper and lower sections, the lower section of the front take-up bar re'lea'sably interlocking with the front hook-shaped section of the frame, a lock bar loosely mounted in the upper hook-shaped section of said bar and around which one end of the screen strip is wrapped with the end of the screen overlapping the end of the upper hook-shaped section for frictionally securing the free end between said hook-shaped section and the main body of the screen strip, a similar lock bar mounted in the upper section of the rear take-up bar and around which the opposite end of the screen strip is wrapped with the end of the screen overlapping the upper end of the upper section of the rear take-up bar and securing it between said section and the main body of the screen strip when the screen is tensioned, and adjustable, yieldable means connected to the lower hook-shaped section of the rear bar for tensioning said screen strip.

2. The combination defined in claim 1 in which a transversely disposed shaft spans the end walls of the apron on the rear of the frame, flat, bowed leaf spring member connected to said shaft and to the lower section of the take-up bar, and means for rotatably adjusting said shaft to tension the screen strip.

3. The combination defined in claim 1 in which a transversely disposed, rotatably adjustable shaft is mounted in said apron and the yieldable means comprises transversely spaced leaf springs connected to the lower end of the rear take-up bar and to said shaft for tensioning said screen strip.

GEORGE W. BEHNKE. RUSSELL G. WES'ICOTT. JOHN SANDULA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 780,826 Sneide Jan. 24, 1905 1,310,305 Smith July 15, 1919 1,332,685 Reynolds Mar. 2, 1920 1,353,549 Sturtevant Sept. 21, 1920 1,713,143 Overstrom May 14, 1929 1,810,146 Schollmeyer June 16, 1931 2,136,950 Overstrom Nov. 15, 1938 2,190,993 Muir Feb. 20, 1940 2,338,523 Lincoln Jan. 4, 1944

US721686A 1947-01-13 1947-01-13 Screen cloth anchoring and tensioning means Expired - Lifetime US2511239A (en)

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Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635751A (en) * 1953-04-21 Sieve hold-down mechanism fob
US2899059A (en) * 1959-08-11 Vibrating screens
US2975900A (en) * 1958-12-08 1961-03-21 Western Machinery Company Basket screens and improved mounting attachments therefor
US3040891A (en) * 1959-11-30 1962-06-26 Walter E Saxe Oblique vibrating screen device
US3070230A (en) * 1958-12-12 1962-12-25 Lottie J Peterson Apparatus for separating materials
US3098037A (en) * 1960-03-14 1963-07-16 Gilson Screen Company Portable tiltable separator
US4077873A (en) * 1975-07-31 1978-03-07 Mckibben Richard K Vibratory separator
US4390420A (en) * 1981-11-12 1983-06-28 Combustion Engineering, Inc. Wire cloth tensioning apparatus
US4457839A (en) * 1980-10-20 1984-07-03 Thule United Limited Vibratory screening apparatus
US5385669A (en) * 1993-04-30 1995-01-31 Environmental Procedures, Inc. Mining screen device and grid structure therefor
US5392925A (en) * 1993-08-12 1995-02-28 Environmental Procedures, Inc. Shale shaker and screen
US5641070A (en) * 1995-04-26 1997-06-24 Environmental Procedures, Inc. Shale shaker
US5944197A (en) * 1997-04-24 1999-08-31 Southwestern Wire Cloth, Inc. Rectangular opening woven screen mesh for filtering solid particles
US5971159A (en) * 1993-04-30 1999-10-26 Tuboscope I/P, Inc. Screen assembly for a vibratory separator
USD425531S (en) 1999-03-29 2000-05-23 Tuboscope I/P, Inc. Screen
US6152307A (en) * 1993-04-30 2000-11-28 Tuboscope I/P, Inc. Vibratory separator screens
US6267247B1 (en) 1993-04-30 2001-07-31 Tuboscope I/P, Inc. Vibratory separator screen
US6269953B1 (en) 1993-04-30 2001-08-07 Tuboscope I/P, Inc. Vibratory separator screen assemblies
US6283302B1 (en) 1993-08-12 2001-09-04 Tuboscope I/P, Inc. Unibody screen structure
US6290068B1 (en) 1993-04-30 2001-09-18 Tuboscope I/P, Inc. Shaker screens and methods of use
US6325216B1 (en) 1993-04-30 2001-12-04 Tuboscope I/P, Inc. Screen apparatus for vibratory separator
US6371302B1 (en) 1993-04-30 2002-04-16 Tuboscope I/P, Inc. Vibratory separator screens
US6401934B1 (en) 1993-04-30 2002-06-11 Tuboscope I/P, Inc. Ramped screen & vibratory separator system
US6443310B1 (en) 1993-04-30 2002-09-03 Varco I/P, Inc. Seal screen structure
US6450345B1 (en) 1993-04-30 2002-09-17 Varco I/P, Inc. Glue pattern screens and methods of production
US6454099B1 (en) 1993-04-30 2002-09-24 Varco I/P, Inc Vibrator separator screens
US20030010437A1 (en) * 1998-10-30 2003-01-16 Adams Thomas C. Screens for vibratory separators
US20030042179A1 (en) * 1998-10-30 2003-03-06 Adams Thomas C. Vibratory separator screens
US6565698B1 (en) 1993-04-30 2003-05-20 Varco I/P, Inc. Method for making vibratory separator screens
US20030132141A1 (en) * 2002-01-16 2003-07-17 Adams Thomas C. Shale shakers and screens for them
US6607080B2 (en) 1993-04-30 2003-08-19 Varco I/P, Inc. Screen assembly for vibratory separators
US6629610B1 (en) 1993-04-30 2003-10-07 Tuboscope I/P, Inc. Screen with ramps for vibratory separator system
US6659286B2 (en) 2001-10-05 2003-12-09 Varco I/P, Inc. Drawbar and screen system
US6669985B2 (en) 1998-10-30 2003-12-30 Varco I/P, Inc. Methods for making glued shale shaker screens
US20040007508A1 (en) * 1999-12-04 2004-01-15 Schulte David L. Screen assembly for vibratory separator
US6722504B2 (en) 1993-04-30 2004-04-20 Varco I/P, Inc. Vibratory separators and screens
US6736270B2 (en) 1998-10-30 2004-05-18 Varco I/P, Inc. Glued screens for shale shakers
US20040245153A1 (en) * 2003-05-02 2004-12-09 Seyffert Kenneth W. Screens and seals for vibratory separators
US20040251175A1 (en) * 1998-10-30 2004-12-16 Adams Thomas C. Apparatuses and methods for making glued screen assemblies
US20050103689A1 (en) * 2001-10-19 2005-05-19 Schulte David L.Jr. Sealing screen assemblies and vibratory separators
US20050224398A1 (en) * 2001-10-19 2005-10-13 Largent David W Vibratory separators and sealing screens
US20130056397A1 (en) * 2011-09-06 2013-03-07 George GELLER Wheelbarrow and Sieve

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US780826A (en) * 1904-05-06 1905-01-24 Abraham M C Sneide Separator.
US1310305A (en) * 1919-07-15 smith
US1332685A (en) * 1917-10-15 1920-03-02 Tyler Co W S Method of and apparatus for screening materials
US1353549A (en) * 1918-06-11 1920-09-21 Sturtevant Mill Co Separator
US1713143A (en) * 1924-02-23 1929-05-14 Gustave A Overstrom Vibrating screen
US1810146A (en) * 1929-08-01 1931-06-16 William A Schollmeyer Curtain and shade fixture
US2136950A (en) * 1935-12-20 1938-11-15 Gustave A Overstrom Stretching apparatus for screen cloths
US2190993A (en) * 1937-05-13 1940-02-20 Herbert H Muir Grading screen
US2338523A (en) * 1942-07-30 1944-01-04 Allis Chalmers Mfg Co Screen cloth tightening means

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1310305A (en) * 1919-07-15 smith
US780826A (en) * 1904-05-06 1905-01-24 Abraham M C Sneide Separator.
US1332685A (en) * 1917-10-15 1920-03-02 Tyler Co W S Method of and apparatus for screening materials
US1353549A (en) * 1918-06-11 1920-09-21 Sturtevant Mill Co Separator
US1713143A (en) * 1924-02-23 1929-05-14 Gustave A Overstrom Vibrating screen
US1810146A (en) * 1929-08-01 1931-06-16 William A Schollmeyer Curtain and shade fixture
US2136950A (en) * 1935-12-20 1938-11-15 Gustave A Overstrom Stretching apparatus for screen cloths
US2190993A (en) * 1937-05-13 1940-02-20 Herbert H Muir Grading screen
US2338523A (en) * 1942-07-30 1944-01-04 Allis Chalmers Mfg Co Screen cloth tightening means

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2635751A (en) * 1953-04-21 Sieve hold-down mechanism fob
US2899059A (en) * 1959-08-11 Vibrating screens
US2975900A (en) * 1958-12-08 1961-03-21 Western Machinery Company Basket screens and improved mounting attachments therefor
US3070230A (en) * 1958-12-12 1962-12-25 Lottie J Peterson Apparatus for separating materials
US3040891A (en) * 1959-11-30 1962-06-26 Walter E Saxe Oblique vibrating screen device
US3098037A (en) * 1960-03-14 1963-07-16 Gilson Screen Company Portable tiltable separator
US4077873A (en) * 1975-07-31 1978-03-07 Mckibben Richard K Vibratory separator
US4457839A (en) * 1980-10-20 1984-07-03 Thule United Limited Vibratory screening apparatus
US4390420A (en) * 1981-11-12 1983-06-28 Combustion Engineering, Inc. Wire cloth tensioning apparatus
US20030038061A1 (en) * 1993-04-30 2003-02-27 Schulte David L. Screen with unibody structure
US20050236305A1 (en) * 1993-04-30 2005-10-27 Schulte David L Jr Vibratory separators and screens for them
US6892888B2 (en) * 1993-04-30 2005-05-17 Varco I/P, Inc. Screen with unibody structure
US6722504B2 (en) 1993-04-30 2004-04-20 Varco I/P, Inc. Vibratory separators and screens
US5971159A (en) * 1993-04-30 1999-10-26 Tuboscope I/P, Inc. Screen assembly for a vibratory separator
US6629610B1 (en) 1993-04-30 2003-10-07 Tuboscope I/P, Inc. Screen with ramps for vibratory separator system
US6032806A (en) * 1993-04-30 2000-03-07 Tuboscope I/P, Inc. Screen apparatus for vibratory separator
US6607080B2 (en) 1993-04-30 2003-08-19 Varco I/P, Inc. Screen assembly for vibratory separators
US6152307A (en) * 1993-04-30 2000-11-28 Tuboscope I/P, Inc. Vibratory separator screens
US6267247B1 (en) 1993-04-30 2001-07-31 Tuboscope I/P, Inc. Vibratory separator screen
US6269953B1 (en) 1993-04-30 2001-08-07 Tuboscope I/P, Inc. Vibratory separator screen assemblies
US6443310B1 (en) 1993-04-30 2002-09-03 Varco I/P, Inc. Seal screen structure
US6290068B1 (en) 1993-04-30 2001-09-18 Tuboscope I/P, Inc. Shaker screens and methods of use
US6302276B1 (en) 1993-04-30 2001-10-16 Tuboscope I/P, Inc. Screen support strip for use in vibratory screening apparatus
US6325216B1 (en) 1993-04-30 2001-12-04 Tuboscope I/P, Inc. Screen apparatus for vibratory separator
US6371302B1 (en) 1993-04-30 2002-04-16 Tuboscope I/P, Inc. Vibratory separator screens
US6401934B1 (en) 1993-04-30 2002-06-11 Tuboscope I/P, Inc. Ramped screen & vibratory separator system
US5385669A (en) * 1993-04-30 1995-01-31 Environmental Procedures, Inc. Mining screen device and grid structure therefor
US6450345B1 (en) 1993-04-30 2002-09-17 Varco I/P, Inc. Glue pattern screens and methods of production
US6454099B1 (en) 1993-04-30 2002-09-24 Varco I/P, Inc Vibrator separator screens
US6565698B1 (en) 1993-04-30 2003-05-20 Varco I/P, Inc. Method for making vibratory separator screens
US6530483B2 (en) 1993-04-30 2003-03-11 Varco I/P, Inc. Unibody structure for screen assembly
US6283302B1 (en) 1993-08-12 2001-09-04 Tuboscope I/P, Inc. Unibody screen structure
US5392925A (en) * 1993-08-12 1995-02-28 Environmental Procedures, Inc. Shale shaker and screen
US5641070A (en) * 1995-04-26 1997-06-24 Environmental Procedures, Inc. Shale shaker
US5988397A (en) * 1996-02-12 1999-11-23 Tuboscope I/P, Inc. Screen for vibratory separator
US5944197A (en) * 1997-04-24 1999-08-31 Southwestern Wire Cloth, Inc. Rectangular opening woven screen mesh for filtering solid particles
US20030010437A1 (en) * 1998-10-30 2003-01-16 Adams Thomas C. Screens for vibratory separators
US6932883B2 (en) 1998-10-30 2005-08-23 Varco I/P, Inc. Screens for vibratory separators
US20040251175A1 (en) * 1998-10-30 2004-12-16 Adams Thomas C. Apparatuses and methods for making glued screen assemblies
US6669985B2 (en) 1998-10-30 2003-12-30 Varco I/P, Inc. Methods for making glued shale shaker screens
US6736270B2 (en) 1998-10-30 2004-05-18 Varco I/P, Inc. Glued screens for shale shakers
US20030042179A1 (en) * 1998-10-30 2003-03-06 Adams Thomas C. Vibratory separator screens
USD425531S (en) 1999-03-29 2000-05-23 Tuboscope I/P, Inc. Screen
US7520391B2 (en) 1999-12-04 2009-04-21 Varco I/P, Inc. Screen assembly for vibratory separator
US20040007508A1 (en) * 1999-12-04 2004-01-15 Schulte David L. Screen assembly for vibratory separator
US6659286B2 (en) 2001-10-05 2003-12-09 Varco I/P, Inc. Drawbar and screen system
US20050224398A1 (en) * 2001-10-19 2005-10-13 Largent David W Vibratory separators and sealing screens
US20050103689A1 (en) * 2001-10-19 2005-05-19 Schulte David L.Jr. Sealing screen assemblies and vibratory separators
US20030132141A1 (en) * 2002-01-16 2003-07-17 Adams Thomas C. Shale shakers and screens for them
US6662952B2 (en) * 2002-01-16 2003-12-16 Varco I/P, Inc. Shale shakers and screens for them
US20040245153A1 (en) * 2003-05-02 2004-12-09 Seyffert Kenneth W. Screens and seals for vibratory separators
US7040488B2 (en) 2003-05-02 2006-05-09 Varco I/P, Inc. Screens and seals for vibratory separators
US20130056397A1 (en) * 2011-09-06 2013-03-07 George GELLER Wheelbarrow and Sieve

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