WO2000067921A1 - Cribles de classement ameliores - Google Patents

Cribles de classement ameliores Download PDF

Info

Publication number
WO2000067921A1
WO2000067921A1 PCT/GB2000/001741 GB0001741W WO0067921A1 WO 2000067921 A1 WO2000067921 A1 WO 2000067921A1 GB 0001741 W GB0001741 W GB 0001741W WO 0067921 A1 WO0067921 A1 WO 0067921A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheet
screen
apertures
grading
secured
Prior art date
Application number
PCT/GB2000/001741
Other languages
English (en)
Inventor
David Rankin
Anne Shanks
Original Assignee
David Rankin
Anne Shanks
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 David Rankin, Anne Shanks filed Critical David Rankin
Priority to GB0126920A priority Critical patent/GB2364003A/en
Priority to AU45924/00A priority patent/AU4592400A/en
Publication of WO2000067921A1 publication Critical patent/WO2000067921A1/fr

Links

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
    • B07B1/4663—Multi-layer screening surfaces
    • 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
    • B07B1/10—Screens in the form of endless moving bands
    • 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
    • B07B1/469—Perforated sheet-like material
    • 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 an improved grading screeen, primarily but not necessarily, for use in grading potatoes, other vegetable or fruit.
  • the present invention is a grading screen formed from one or more sheets of wear-resistant, non-metallic, material in which a plurality of closely spaced apertures are provided.
  • one elongate sheet is formed into a continuous belt with its ends joined together by fastening means.
  • the fastening means beneficially comprises two parts, both parts being of reflexive section and having two limbs with one part being secured to each end of the sheet with a limb above and below the said end of the sheet.
  • One part is desirably provided with a lengthwise series of hook elements and the other part being provided with a correspondingly spaced lengthwise series of apertures through which extends and is secured a rod around which each hook element is engagable and is held.
  • the elongate sheet is preferably arranged around a set of three or more rollers, at least one of which is adapted to be driven, the items to be screened being fed onto the upper flight of the belt.
  • Movement means may be provided to vibrate at least the upper flight of the belt.
  • the screen is for use as a flat bed grader having a vibratory, oscillatory or reciprocatory movement in a grading apparatus, and has two opposite lateral sides each having strap securing means therealong and at least at one end of the strap securing means, a tensioning bar extends between mountings provided on the strap securing means to maintain the sheet taut.
  • the apertures in the or each sheet are similar and are provided in a regular pattern across the sheet.
  • the sheet is beneficially formed of a multi-layered material, the topmost layer being of a soft rubber or synthetic rubber compound-
  • Fig. 1 is a side perspective view of a screen according to a first embodiment of the present invention
  • Fig. 2 is an exploded perspective view of a fastening means
  • Fig. 3 is a perspective view of a part of a grading screen according to a second embodiment of the present invention.
  • Fig. 4 is an end elevational view of the screen in the direction of arrow A.
  • a grading screen particularly, but not exclusively, for grading potatoes is formed from one or more sheets 10 of wear-resistant, non- metallic material.
  • the or each sheet 10 has a plurality of similar apertures 12 spaced in a regular pattern across the sheet 10.
  • the apertures are substantially square, hexagonal or round. Square apertures have typically a 10mm radius on each corner.
  • the sheet 10 is formed of a multi-layered material, the topmost layer being of a soft rubber or synthetic rubber compound.
  • the material is constructed using layers of pre-tensioned synthetic fabric, such as polyester bonded together in layers of rubber or synthetic rubber.
  • This carcass is encased between a top and a bottom covering of rubber or synthetic rubber.
  • the bottom covering conforms to standard conveyor specification DIN 22102 Type Y or British Standard BS490.
  • DIN 22102 Type Y or British Standard BS490 This is a wear resistant conveyor belt suitable for highly abrasive applications.
  • On a shore hardness test it has a shore hardness rating of 60 + or - 5% which is typical for a standard conveyor rubber.
  • the top covering is made of a high quality super-soft rubber compound which has the advantage of reducing damage and bruising on the potato or other vegetable or fruit being graded to a minimum.
  • On a shore hardness test it measures 40 shore hardness + or - 5%.
  • the top layer is made of a high grade mnatural rubber compound which is cured to give a soft texture but which still has excellent resistance to abrasion- The softness of the rubber is dependant upon variations in temperature pressure and time taken during the curing process.
  • This top covering is bonded to the other layers of the sheet producing a very soft surface. This material combines the strength and wear resistance of a heavy duty rubber conveyor with the advantages of a hard wearing but highly shock absorbent, cushioned surface.
  • one elongate sheet 10 is formed into a continuous belt with its ends joined together by fastening means.
  • the fastening means (Fig. 2) comprises two parts 30, 32. Both parts 30, 32 are of reflexive section, each having two limbs 34 with one part 30 being secured to each end of the sheet 10 with a limb 34 above and one below the said end of the sheet 10.
  • the parts are of metal or hard-wearing plastics material.
  • the two limbs 34 of each part 30, 32 are secured together trapping the respective end of the sheet 10.
  • One part 30 is provided with a lengthwise series of hook elements 36 and the other part 32 is provided with a correspondingly spaced lengthwise series of apertures 38 through which extends and is secured a rod 40 around which each hook element 36 is engagable and is held.
  • the elongate sheet 10 is arranged around a set of three or more rollers 42 ( four rollers 42 are shown, at least one of which is adapted to be driven.
  • the items to be screened being fed onto the upper flight of the sheet 10.
  • Movement means in the form of power driven agitators (not shown) are provided to vibrate at least the upper flight of the sheet 10.
  • Conveying apparatus of conventional construction is/are provided to remove each grade of potatoes screened and any debris.
  • the tautness of the sheet 10 is governed by the distance apart of the rollers 42 (one roller may be a jockey roller spring biased to take up any slack). Sides are provided along the length of upper flight of the belt with the lower flight spaced from the upper flight to allow collection hoppers or feed boots for other conveyors to be located under the upper flight to collect the rejected potatoes, soil and debris, passing through the apertures, for further processing.
  • the two part fastener described above has been designed to be changed with the minimum of delay. It is advantageous to reduce the time taken for changing sheets on grading apparatus to a minimum since 'downtime' means lost production time. Normal conveyor fasteners are not designed to be released easily as conveyors are not usually changed frequently.
  • the sheet 10 is for securing across or around a frame (not shown) in a grading apparatus (not shown).
  • the screen 10 is for use as a flat bed grader having a vibratory, oscillatory or reciprocatory movement in a grading apparatus, the movement causing any potatoes fed onto the screen to migrate thereacross with any soil and debris and potatoes smaller than the apertures 12 falling through the apertures 12, the potatoes larger than the apertures 12 passing across the sheet 10 and being collected at the discharge end thereof.
  • the sheet 10 has two opposite lateral sides, each having strap securing means 14 therealong.
  • the means 14 comprises two straps 14A, 14B secured together by a series of fastening devices 16, each for example a bolt and nut, at intervals therealong.
  • a tensioning bar 18 extends between mountings 20 provided on the strap securing mans 14 to maintain the sheet 10 taut.
  • Each mounting 20 is an upright extension 20A of strap 14A at the inboard side of the strap 14A, the extension 20A having a threaded boss 22 through which one end of the bar 18 passes in threaded engagement as shown.
  • the apertures 12 in each sheet 10 are similar and are provided in a regular patters across the sheet 10.
  • potatoes to be graded are fed thereunto, for example from a hopper or from an elevator. As described above, by the movement imparted to the sheet 10, the potatoes migrate across the sheet 10 with potatoes smaller than the apertures 12 passing therethrough as well as any soil and debris. The larger potatoes are collected at the discharge end of the screen.
  • More than one sheets can be used, for example in a vertically spaced arrangement, the sheets in such an arrangement having apertures of lesser diameter from top sheet to bottom sheet to obtain different grades of potatoes.
  • a cascade arrangement of sheets can be placed in an end-to- end arrangement to obtain a series of different sized grades of potatoes.

Landscapes

  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Preparation Of Fruits And Vegetables (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Filtration Of Liquid (AREA)

Abstract

La présente invention concerne un crible de classement fabriqué à partir d'une ou plusieurs feuilles (10) d'un matériau non métallique résistant à l'usure percé d'une pluralité d'ouvertures rapprochées (12). Une feuille allongée (10) est transformée en une ceinture continue dont les extrémités sont unies à l'aide d'un moyen de fixation. Le moyen de fixation comprend deux parties (30,32). Ces deux parties sont de section réflexive et possèdent deux membres (34) dont une partie (30) est attachée à chaque extrémité de la feuille (10), un membre (34) étant placé au-dessus et un autre en-dessous de l'extrémité de la feuille (10). Une partie (30) est munie d'une série longitudinale d'éléments crochets (36) et l'autre partie (32) est munie d'une série longitudinale d'ouvertures formées à des intervalles correspondants (38) à travers laquelle s'étend et est fixée une tige (40) autour de laquelle chaque élément crochet peut être accroché et maintenu en place.
PCT/GB2000/001741 1999-05-11 2000-05-11 Cribles de classement ameliores WO2000067921A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0126920A GB2364003A (en) 1999-05-11 2000-05-11 Improved grading screens
AU45924/00A AU4592400A (en) 1999-05-11 2000-05-11 Improved grading screens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9910859.9 1999-05-11
GBGB9910859.9A GB9910859D0 (en) 1999-05-11 1999-05-11 Improved grading screens

Publications (1)

Publication Number Publication Date
WO2000067921A1 true WO2000067921A1 (fr) 2000-11-16

Family

ID=10853195

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001741 WO2000067921A1 (fr) 1999-05-11 2000-05-11 Cribles de classement ameliores

Country Status (3)

Country Link
AU (1) AU4592400A (fr)
GB (2) GB9910859D0 (fr)
WO (1) WO2000067921A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2726220A1 (fr) * 2011-06-29 2014-05-07 Cubility AS Toile à tamis et son procédé d'utilisation
CN108722876A (zh) * 2018-06-29 2018-11-02 唐山学院 一种多级水果分类装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE343313C (fr) *
US2003987A (en) * 1933-10-30 1935-06-04 Amantea Samuel Belt fastener
DE2300792A1 (de) * 1972-01-07 1973-07-19 Ts Osrodek Badawaczo Proj Elastisches sieb und dessen herstellung
US3900628A (en) * 1973-06-13 1975-08-19 Linatex Corp Of America Pretensioned screen panel
FR2372353A1 (fr) * 1976-11-30 1978-06-23 Goro Procede de jonction des extremites d'un tapis transporteur ou similaire, et tapis dont les extremites sont ainsi assemblees
DE2724940A1 (de) * 1977-06-02 1978-12-14 Gummi Jaeger Kg Gmbh & Cie Siebeinrichtung zum kartoffelsortieren
GB2015895A (en) * 1978-03-09 1979-09-19 Jabelmann Ludwig Vibratory Endless Screen Belt
FR2606096A1 (fr) * 1986-11-04 1988-05-06 Femenia Fabrication Dispositif d'articulation de patins successifs d'une bande sans fin, notamment d'une chenille
US5887729A (en) * 1994-11-18 1999-03-30 Sugiyama; Hiroaki Automatic sorting apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE343313C (fr) *
US2003987A (en) * 1933-10-30 1935-06-04 Amantea Samuel Belt fastener
DE2300792A1 (de) * 1972-01-07 1973-07-19 Ts Osrodek Badawaczo Proj Elastisches sieb und dessen herstellung
US3900628A (en) * 1973-06-13 1975-08-19 Linatex Corp Of America Pretensioned screen panel
FR2372353A1 (fr) * 1976-11-30 1978-06-23 Goro Procede de jonction des extremites d'un tapis transporteur ou similaire, et tapis dont les extremites sont ainsi assemblees
DE2724940A1 (de) * 1977-06-02 1978-12-14 Gummi Jaeger Kg Gmbh & Cie Siebeinrichtung zum kartoffelsortieren
GB2015895A (en) * 1978-03-09 1979-09-19 Jabelmann Ludwig Vibratory Endless Screen Belt
FR2606096A1 (fr) * 1986-11-04 1988-05-06 Femenia Fabrication Dispositif d'articulation de patins successifs d'une bande sans fin, notamment d'une chenille
US5887729A (en) * 1994-11-18 1999-03-30 Sugiyama; Hiroaki Automatic sorting apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2726220A1 (fr) * 2011-06-29 2014-05-07 Cubility AS Toile à tamis et son procédé d'utilisation
EP2726219A1 (fr) * 2011-06-29 2014-05-07 Cubility AS Toile à tamis et son procédé d'utilisation
EP2726220A4 (fr) * 2011-06-29 2014-12-24 Cubility As Toile à tamis et son procédé d'utilisation
EP2726219A4 (fr) * 2011-06-29 2014-12-24 Cubility As Toile à tamis et son procédé d'utilisation
US9072994B2 (en) 2011-06-29 2015-07-07 Cubility As Sieve cloth and method of using same
US9358483B2 (en) 2011-06-29 2016-06-07 Cubility As Sieve cloth and method of using same
CN108722876A (zh) * 2018-06-29 2018-11-02 唐山学院 一种多级水果分类装置

Also Published As

Publication number Publication date
GB9910859D0 (en) 1999-07-07
GB0126920D0 (en) 2002-01-02
GB2364003A (en) 2002-01-16
AU4592400A (en) 2000-11-21

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