EP0026961A2 - Screen element and screen module comprising such element - Google Patents
Screen element and screen module comprising such element Download PDFInfo
- Publication number
- EP0026961A2 EP0026961A2 EP80300640A EP80300640A EP0026961A2 EP 0026961 A2 EP0026961 A2 EP 0026961A2 EP 80300640 A EP80300640 A EP 80300640A EP 80300640 A EP80300640 A EP 80300640A EP 0026961 A2 EP0026961 A2 EP 0026961A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- screen
- element according
- inner part
- parts
- section
- 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.)
- Granted
Links
Images
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
- B07B1/4645—Screening surfaces built up of modular elements
Abstract
Description
- This invention relates to screening, and in particular to sieve screens produced by connecting together a plurality of sieve elements. Such screens are used in screening machines for dewatering, grading and the like.
- It is known to cast an individual sieve element in a standard size as a mesh of polymeric material having apertures of a required shape and size. The mesh is often reinforced by the incorporation of inelastic material during casting.
- A plurality of such sieve elements are then bonded together to provide a sieve screen of desired overall dimensions which is then fitted over a support frame in the screening machine.
- I have previously proposed that such sieve elements have complementary adjacent edge formations to interengage one with the other and for those edge formations to accommodate an elongate interlocking member passing through and bonded in a channel therethrough. In particular, I have suggested that the channel is open to one side, namely the under or downstream side, of the elements freely to accept a said elongate interlocking member subsequently bonded therein, say by filling the unoccupied channel section with the material of the screen elements or a bonding or potting material compatible therewith.
- It is an object of this invention to provide an alternative an advantageous interlocking arrangement.
- According to one aspect of the invention the cross-section of an elongate interlocking member accommodation channel has an inner part corresponding closely, at least at one side when interlocked,.to the cross-section of said interlocking member and an outer part to a side of the elements that is, at least adjacent to the inner part, of less width and permits snap-in fitting and retention of said interlocking member.
- In one preferred embodiment, the channel cross-section is of generally key-hole shape and its outer part may be divergent sided towards the said element side but usually with a terminal spacing less than the width of the interlocking member.
- In another preferred embodiment, the channel cross-section is oblong to take a correspondingly shaped rod or bar, preferably with retention lips only to one side, the inner, of projections from the sieve elements to engage in the edge of the rod or has alternately from one side and the other.
- Compared with my above mentioned proposals, there is then.no need.for filling of unoccupied channel section space in order to achieve a desired positive and secure interlocking, and with a minimum interruption of smooth and continuous surface across joints between adjacent screen elements. Advantages also arise in relation to peripherally bounded through-holes for interlocking members in that work space is not required for insertion of such members from one side, especially where those members are substantially rigid as is usual, and in that a closer than sliding fit can be provided between the members and the inner parts of the channels, even to the extent of obtaining a gripping contact by reason of the resilience of the screen material and very close tolerancing, even slight undersizing, of the inner part cross-section at least as to width and relative to the interlocking member, but not such as to risk distortion of the elements. There is also at least the possibility of individual element removal and replacement by knocking off and on.
- There is also at least a small saving on width of the interengaging parts of the screen elements due to the absence of any requirement for clearance fitting of . the interlocking member in its accommodating channel, and a substantial facilitation of obtaining touching tight fit of adjacent screen edge parts, especially if resilience of the material of the screen elements is relied upon as above or by slight misalignment of the channel inner parts in the interlocking parts of respective ones of the screen elements. Again, element distortion is however, to be avoided.
- .Width saving between adjacent elements is further enhanced by the use of a preferred interlocking element of so-called wedge wire having a relatively narrow wedge-like section with its tapering convergent sides increased in convergence rate close to its narrow edge. Presentation of that narrow edge to the outer channel part also greatly facilitates insertion of the interlocking element bodily from the side of the elements through the relatively restricted outer channel part. At least as much advantage is gained from my other preferred flattish rod or bar.
- I have referred to width saving as between adjacent elements and this is significant, however small, in increasing the ratio of working area equipped with apertures to total area of a multi-element screen, and my screen elements have another feature contributing substantially to-this.
- Polymeric materials, such as polyurethane, used for moulding screen elements have substantial flexibility, a feature which, indeed, is believed to contribute to their surprisingly long working life. The screen elements thus require reinforcement at least at their edges, and especially where, as I prefer, pluralities of elements are interconnected together to make up screens or screen parts that are suitably for direct replacement of previous wedge-wire screen elements without the necessity for a special subframe. I have found that oblong screen elements to intercouple at their long edges are extremely satisfactory if formed with a major division of apertured area from long edge to long edge with an incorporated reinforcement following the edges and such division and fabricated from flat steel strip disposed within moulding parts depending from the apertured areas. Such very narrow reinforcement is very good for the purpose of maximising working screen area by minimising the width of reinforcement housing and, most surprisingly, further permits a screen element with quartering reinforcement of 10mm x 2.5 mm mild steel strip and measuring 272 mm x 183 mm (ex interengaging edge parts) x 25 mm (reinforcing housing height) to be bent over its width to a radius of as little as 25 cm, say for the making of centrifuge baskets.
- One embodiment of the invention will now be described by way of example with reference to the accompanying drawings, in which:
- Figure 1 is a plan view of one screening element from below;
- Figure 2 is a section as A-A of Figure 1;
- Figure 3 is a detail sectional view of edge intercoupling for adjacent screen elements;
- Figure 4 shows alternative edge intercoupling; and
- Figures 5 and 6 show alternative reinforcings.
- In Figures 1 and 2 an oblong screen element 1 comprises a moulding of polymeric material, specifically with
peripheral edging short side edgings 14, 16 arefull height ribbings equal areas parts thin ribs longside edgings screening bars 40 with downwardlyconvergent sides 42. Thesescreening bars 40 define the screening particle size, resist blockage by their tapering and are also of very considerable flexibility. - The
edgings 10 to 16 and ribbings 18, 20 house a welded-up reinforcingsteel frame 50 fabricated from flat strip to minimise housing width requirements and thereby maximise apertured working screen area. - The long side edgings 10, 12 have outward spaced
extensions extensions extensions channels 56 on them that comprise in section, see Figure 3, aninner part 58 and a relatively narrowouter part 60 to theirundersides 61. - Elongate interlocking
member 62 can be press-fitted through the channelouter parts 60 and into the channelinner parts 58 with, at least when fitted, close sectional correspondence of the interlocking member and the channelouter parts 60. This correspondence will, of course, normally be approximated as closely as possible in manufacture, but due to the resilience of the polymeric material, one-sided tolerances from nominal can be permitted, i.e. oversize for the interlocking member and undersize for the inner channel part. - The preferred cross-section of the
inner channel parts 58 correspond to that of a wedge wire type interlocking member of which the section hasconvergent sides 64 from a flat relativelywide edge 66 and of initially constant slope towards itsnarrower edge 68 near to which the slope increases. This is readily forced narrow edge first into the channels, especially where, as shown,outer parts 60 are divergent sided though terminating at a spacing less than that of thewider wire edge 66. - Knocking-off of an individual screen element may be facilitated if the
wide wire edge 66 has chamfered corners, or if the wire tapers from its largest width towards both edges, though not necessarily in the same way or to the same extent. - Extremely good close and positive interrelation of adjacent screen elements can be attained in this way.
- An alternative intercoupling with inner channel part cross-sections oversize relative to the interlocking member is shown in Figure 4 where the
inner channel parts 58 are offset as between the interengagingedging extensions - We have described reinforcing wire of wedge-shaped section and referred to the possible double tapering thereof. In fact, experiments have shown that a square-section reinforcement is a practical proposition, especially with a similarly shaped inner cavity 58' entered at one corner as shown in Figure 5. However, a rectangular rod for example of 3:1 aspect ratio, could be used with a corresponding inner channel cavity, but still to be forced in its narrow dimension, past a constricted channel entry, and maximises strength obtained for the weight of the rod. Just such an arrangement is shown in Figure 6 with an
oblong cavity 88 shaped to fit a rod or bar 90-within aside lip 92, 92' of the intercalating channeled parts of the sieve elements. That most usefully affords such lips from alternating sides thereof along the length of the rod or bar 90 when - snapped into place.
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT80300640T ATE6746T1 (en) | 1979-10-06 | 1980-03-04 | SCREEN ELEMENT AND SCREEN PLATE WITH SUCH ELEMENT. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7934767 | 1979-10-06 | ||
GB7934767A GB2059278B (en) | 1979-10-06 | 1979-10-06 | Screen construction |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0026961A2 true EP0026961A2 (en) | 1981-04-15 |
EP0026961A3 EP0026961A3 (en) | 1981-05-13 |
EP0026961B1 EP0026961B1 (en) | 1984-03-21 |
Family
ID=10508342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80300640A Expired EP0026961B1 (en) | 1979-10-06 | 1980-03-04 | Screen element and screen module comprising such element |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0026961B1 (en) |
AT (1) | ATE6746T1 (en) |
DE (1) | DE3067085D1 (en) |
GB (1) | GB2059278B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000053343A1 (en) * | 1999-03-08 | 2000-09-14 | Ludowici Mineral Processing Equipment Pty Ltd | Screening apparatus |
WO2006031176A1 (en) | 2004-09-15 | 2006-03-23 | Metso Minerals (Wear Protection) Ab | Screen and screen element |
CN110116090A (en) * | 2019-05-30 | 2019-08-13 | 莫图泰克筛分系统(天津)有限公司 | A kind of wave-shaped sieve plate and its production technology |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1758860A1 (en) * | 1968-08-22 | 1971-06-03 | Stahlgruber Gruber & Co Otto | Elastic sieve bottom |
GB1458932A (en) * | 1975-04-03 | 1976-12-15 | Hutter Schrantz Ag | Sieves |
FR2370527A1 (en) * | 1976-11-10 | 1978-06-09 | Spiller Clifford | IMPROVEMENT OF SCREENING OR SIEVING DEVICES |
FR2380080A1 (en) * | 1977-02-15 | 1978-09-08 | Hein Lehmann Ag | SCREEN CLOTH |
DE2754374A1 (en) * | 1977-12-07 | 1979-06-13 | Kueper Gummi | Screen for screening or sifting machine - has interlocking tongue edge panels which can be replaced in sections when worn |
DE2808940A1 (en) * | 1978-03-02 | 1979-09-13 | Hein Lehmann Ag | Sieve base with self-cleaning action - has thin plate with tapered holes and resilient integral clips for attachment to supports |
-
1979
- 1979-10-06 GB GB7934767A patent/GB2059278B/en not_active Expired
-
1980
- 1980-03-04 DE DE8080300640T patent/DE3067085D1/en not_active Expired
- 1980-03-04 EP EP80300640A patent/EP0026961B1/en not_active Expired
- 1980-03-04 AT AT80300640T patent/ATE6746T1/en not_active IP Right Cessation
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1758860A1 (en) * | 1968-08-22 | 1971-06-03 | Stahlgruber Gruber & Co Otto | Elastic sieve bottom |
GB1271857A (en) * | 1968-08-22 | 1972-04-26 | Stahlgruber Gruber & Co Otto | Elastomeric sieve bottom |
GB1458932A (en) * | 1975-04-03 | 1976-12-15 | Hutter Schrantz Ag | Sieves |
FR2370527A1 (en) * | 1976-11-10 | 1978-06-09 | Spiller Clifford | IMPROVEMENT OF SCREENING OR SIEVING DEVICES |
GB1558086A (en) * | 1976-11-10 | 1979-12-19 | Spiller C M | Screening |
FR2380080A1 (en) * | 1977-02-15 | 1978-09-08 | Hein Lehmann Ag | SCREEN CLOTH |
DE2754374A1 (en) * | 1977-12-07 | 1979-06-13 | Kueper Gummi | Screen for screening or sifting machine - has interlocking tongue edge panels which can be replaced in sections when worn |
DE2808940A1 (en) * | 1978-03-02 | 1979-09-13 | Hein Lehmann Ag | Sieve base with self-cleaning action - has thin plate with tapered holes and resilient integral clips for attachment to supports |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000053343A1 (en) * | 1999-03-08 | 2000-09-14 | Ludowici Mineral Processing Equipment Pty Ltd | Screening apparatus |
WO2006031176A1 (en) | 2004-09-15 | 2006-03-23 | Metso Minerals (Wear Protection) Ab | Screen and screen element |
US8469199B2 (en) | 2004-09-15 | 2013-06-25 | Metso Minerals (Sweden) Ab | Screen and screen element |
CN110116090A (en) * | 2019-05-30 | 2019-08-13 | 莫图泰克筛分系统(天津)有限公司 | A kind of wave-shaped sieve plate and its production technology |
Also Published As
Publication number | Publication date |
---|---|
EP0026961B1 (en) | 1984-03-21 |
EP0026961A3 (en) | 1981-05-13 |
GB2059278A (en) | 1981-04-23 |
ATE6746T1 (en) | 1984-04-15 |
GB2059278B (en) | 1983-09-21 |
DE3067085D1 (en) | 1984-04-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA1293223C (en) | Screen component for modular screening decks | |
CA1157426A (en) | Screen deck for vibratory screening machines | |
US6253926B1 (en) | Modular screen panel | |
USRE38303E1 (en) | Particle screening system | |
US5056286A (en) | Screen plate | |
EP0891819B1 (en) | Improved screening apparatus | |
US3980555A (en) | Replacable screen with frame | |
US4219412A (en) | Screening machines | |
EP0619796B2 (en) | Transport pallet made of plastics | |
AU606948B2 (en) | Procedure for manufacturing a screen-mat as an in-lay for systematic-screen fields, and a screen-in-lay for systematic-screen fields | |
US4347129A (en) | Screening module | |
US4190527A (en) | Interlocking screen elements | |
MXPA05011398A (en) | Undulating molded plastic vibratory screen. | |
WO1998006907A1 (en) | Soil reinforcement | |
US3610419A (en) | Filter leaf | |
EP0032436B1 (en) | Screening apparatus | |
EP0026961B1 (en) | Screen element and screen module comprising such element | |
US5363970A (en) | Screening arrangement | |
US3970550A (en) | Moulded elastomeric screen mat for sieving devices | |
CA1152947A (en) | Rectangular interlockable modular screen deck system | |
CA2269314C (en) | Wear resistant screen, screen panel or the like | |
US4375408A (en) | Elastomeric framing member for screen deck panel | |
US2015139A (en) | Screen plate for paper making machines | |
US3428184A (en) | Screens for removal of liquid from sludge materials | |
AU714741B2 (en) | Modular screen panel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
17P | Request for examination filed |
Effective date: 19811110 |
|
ITF | It: translation for a ep patent filed |
Owner name: LENZI & C. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
REF | Corresponds to: |
Ref document number: 6746 Country of ref document: AT Date of ref document: 19840415 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 3067085 Country of ref document: DE Date of ref document: 19840426 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19910222 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19910313 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19910320 Year of fee payment: 12 Ref country code: FR Payment date: 19910320 Year of fee payment: 12 |
|
ITTA | It: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19910331 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19910402 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19910403 Year of fee payment: 12 Ref country code: CH Payment date: 19910403 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 19910503 Year of fee payment: 12 |
|
EPTA | Lu: last paid annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19920304 Ref country code: GB Effective date: 19920304 Ref country code: AT Effective date: 19920304 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19920305 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Effective date: 19920331 Ref country code: BE Effective date: 19920331 |
|
BERE | Be: lapsed |
Owner name: SPILLER CLIFFORD MICHAEL Effective date: 19920331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19921001 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19921130 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19921201 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 80300640.2 Effective date: 19921005 |