WO2022133071A1 - Ceramic lined aperture screening panel - Google Patents
Ceramic lined aperture screening panel Download PDFInfo
- Publication number
- WO2022133071A1 WO2022133071A1 PCT/US2021/063775 US2021063775W WO2022133071A1 WO 2022133071 A1 WO2022133071 A1 WO 2022133071A1 US 2021063775 W US2021063775 W US 2021063775W WO 2022133071 A1 WO2022133071 A1 WO 2022133071A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aperture
- insert
- ceramic
- screen panel
- screening
- 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.)
- Ceased
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
-
- 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
Definitions
- the present disclosure relates generally to screening systems, or more particularly, screen panels for use in screening systems.
- Screening systems are used in the mining and other industries to size and separate desired materials from less desired materials, e.g., by screening particulate materials.
- Certain screening systems are composed of a plurality of modular and replaceable screening media.
- the screening media can include modular screen panels which are removably mountable to a support frame to define an overall screening surface.
- the screen panels include a plurality of screening apertures dimensioned to separate the desired material from less desired material.
- the screening system is vibrated and the mixture of particulate material is deposited on the screening surface.
- the particulate material migrates in a preferential feed direction on the screening system, and the screening apertures allow smaller material particles to pass through the screening surface while preventing larger material particles from passing through the screening surface, thereby achieving desired sizing separation of the particulate material.
- Certain screening panels can suffer several disadvantages.
- conventional screen panels are constructed of a frame or insert that is encapsulated by a resilient material, such as a polymeric material, such as polyurethane or rubber.
- a resilient material such as a polymeric material, such as polyurethane or rubber.
- the intense vibrations and abrasive nature of the screening process results in excessive wear that can abrade or remove material from the relatively soft polymeric materials. This wear results in premature failure of the screen panels and requires frequent monitoring, maintenance, or panel replacement.
- the shape and size of the screening apertures in the screen panel changes, resulting in apertures that are no longer suitable for their original screening intent. In this regard, wear may effectively expand the screening apertures to a size which allows particles that are unacceptably large to pass through the screen panel, thus defeating the purpose of material screening panel and requiring premature repair or replacement.
- a screening system including screen panels having improved wear characteristics would be useful. More specifically, screen panels that are capable of screening abrasive materials with reduced wear and long lifetime while maintaining the designed aperture geometries for the extended lifetime of the screen panel would be particularly beneficial.
- a screening system including a screen panel at least partially defining a screening surface and an aperture configured to separate material and a ceramic aperture insert mounted to the screen panel, the ceramic aperture insert at least partially defining the screening surface and the aperture.
- a screen system including a screen panel defining a plurality of apertures that extend along a vertical direction through the screen panel, each of the plurality of apertures being at least partially defined by an aperture wall of the screen panel, the screen panel further defining at least one insert recess defined above the aperture wall along the vertical direction.
- One or more ceramic aperture inserts are positioned within the at least one insert recess, each of the plurality of apertures being defined by an inner face of the one or more ceramic aperture inserts and the aperture wall of the screen panel, and wherein a screening surface is defined by a top surface of the screen panel and a top face of the one or more ceramic aperture inserts.
- FIG. 1 depicts an example screen panel with ceramic aperture inserts according to example embodiments of the present disclosure.
- FIG. 2 depicts a perspective view of a ceramic aperture insert according to example embodiments of the present disclosure.
- FIG. 3 depicts a cross-sectional view of a ceramic aperture insert mounted within an aperture of a screen panel according to example embodiments of the present disclosure.
- FIG. 4 depicts a perspective view of a screen panel with ceramic aperture inserts according to another example embodiment of the present subject matter.
- FIG. 5 depicts a side, cross-sectional view of the example screen panel of FIG. 4 according to example embodiments of the present disclosure.
- FIG. 6 depicts a close-up, cross-sectional view of the example ceramic aperture inserts and screen panel of FIG. 4 according to example embodiments of the present disclosure.
- FIG. 7 depicts a perspective view of an insert segment of the example ceramic aperture insert of FIG. 4 according to example embodiments of the present disclosure.
- FIG. 8 depicts a top view of the example ceramic aperture inserts and screen panel of FIG. 4 illustrated partially in phantom according to example embodiments of the present disclosure.
- FIG. 9 depicts a top view of an example screen panel with ceramic aperture inserts according to example embodiments of the present disclosure.
- FIG. 10 depicts a perspective view of an example screen panel with ceramic aperture inserts according to example embodiments of the present disclosure.
- FIG. 11 depicts a top view of an example screen panel with ceramic aperture inserts according to example embodiments of the present disclosure.
- the terms “first,” “second,” and “third” may be used interchangeably to distinguish one component from another and are not intended to signify location or importance of the individual components.
- the terms “includes” and “including” are intended to be inclusive in a manner similar to the term “comprising.”
- the term “or” is generally intended to be inclusive (i.e. , “A or B” is intended to mean “A or B or both”).
- range limitations may be combined and/or interchanged. Such ranges are identified and include all the sub-ranges contained therein unless context or language indicates otherwise. For example, all ranges disclosed herein are inclusive of the endpoints, and the endpoints are independently combinable with each other.
- the singular forms “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise.
- Approximating language may be applied to modify any quantitative representation that could permissibly vary without resulting in a change in the basic function to which it is related. Accordingly, a value modified by a term or terms, such as “generally,” “about,” “approximately,” and “substantially,” are not to be limited to the precise value specified. In at least some instances, the approximating language may correspond to the precision of an instrument for measuring the value, or the precision of the methods or machines for constructing or manufacturing the components and/or systems. For example, the approximating language may refer to being within a 10 percent margin, i.e., including values within ten percent greater or less than the stated value.
- aspects of the present disclosure are directed to screening systems 100 which may be used in the mining and other industries to size and separate desired materials from less desired materials, e.g., by screening aggregate material, particulate materials, or other mixtures having various particulate sizes and shapes.
- screening system 100 may generally include support frames and additional systems for transporting screening materials, vibrating screening system 100, and performing other actions to facilitate the screening process.
- support frames and additional systems for transporting screening materials e.g., vibrating screening system 100, and performing other actions to facilitate the screening process.
- screening systems are composed of a plurality of modular and replaceable screening media.
- aspects of the present subject matter are generally directed to screen panels 102 for used in screening systems, such as screening system 100, for screening materials.
- These screen panels 102 may be modular and may be removably mounted to the support frame of screening system 100 to define an overall screening surface (e.g., identified generally herein by reference numeral 104).
- Each screen panel 102 may generally include or define a plurality of screening apertures 106 that are dimensioned for a particular application in order to separate desired materials from less desired materials.
- screening system 100 vibrates one or more of screen panels 102 while a mixture of particulate material is deposited on screening surface 104.
- the mixture of particulate material may migrate in a preferential feed direction on the screening surface 104, and screening apertures 106 may allow smaller material particles to pass through screening surface 104 while preventing larger material particles from passing through screening surface 104, thereby achieving desired sizing separation of the mixture of particulate material.
- Screen media e.g., such as screen panel 102
- the abrasive nature of the screening process encourages use of screen media made from materials that are highly resistant to abrasion wear. Over time, as the media wears away, the shape and size of the apertures in the media material changes resulting in undesirable variation in the size of particles passing through the screen media. Practical applications require a balance among the cost of the screen media, the wear rate of the screen media, and a tolerable amount of particle size variation for material passing through the screen media.
- aspects of the present subject matter are generally directed to screen panels 102 with improved abrasion and wear resistance. More specifically, screen panels 102 described herein are particularly suited to reduce wear from interaction with mixtures of aggregate screening materials, generally resulting in a longer panel lifetime and better screening performance.
- each of the screen panels 102 described herein includes features for reducing wear, particularly around the apertures 106 that are used to screen the material mixtures. Notably, improved abrasion and wear resistance around the apertures may result in improved screening for the lifetime of screen panels 102, as the shape and size of the apertures 106 remain relatively constant.
- Example screen media materials can include steel wire, stainless steel wire, rubber, and urethane elastomers.
- screen panels 102 can include, for instance, one or more ceramic aperture inserts (e.g., identified generally by reference numeral 110) that extend at least partially around a perimeter of at least one aperture 106 for improve wear resistance and panel durability.
- ceramic aperture inserts 110 e.g., identified generally by reference numeral 110
- screen panel 102 may generally be a solid or substantially solid panel with a plurality of apertures 106 that are molded, punched, or otherwise formed within screen panel 102.
- screening system 100 may rely at least in part on the force of gravity during the screening process and each screen panel 102 may generally define a vertical direction V, a lateral direction L, and a transverse direction T, each of which is mutually perpendicular, such that an orthogonal coordinate system is generally defined.
- the vertical direction V of screen panel 102 is substantially aligned or parallel to the force of gravity.
- screen panel 102 may include a polymer matrix 112 or other suitable support frame for maintaining the integrity of apertures 106 even through the intense screening process.
- a reinforcing structure can be embedded within the polymer matrix 112 or attached to the polymer matrix 112 to provide strength and stiffness to the composite screening panel 102.
- the polymer can be of any type such as a rubber or urethane elastomer or blends of elastomers or other suitable polymers.
- the reinforcing structure can be made of steel, aluminum, fiber reinforced polymer, or other suitable reinforcing materials and can be shaped such that is does not interfere with the positioning of ceramic aperture inserts 106.
- the polymer matrix 112 surrounding the ceramic aperture inserts 110 can serve to bind together the ceramic aperture inserts 110 in predetermined patterns for optimal screening performance.
- the polymer matrix 112 can fill the spaces between and around the ceramic aperture inserts 110.
- the polymer matrix 112 serves to separate and isolate the ceramic aperture inserts 110 and to bond the ceramic aperture inserts 110 together forming a modular screen panel 102 with defined dimensions and a well-defined aperture pattern.
- the polymer material can also serve to provide additional features such as attachment elements to attach screen panel 102 to a frame system.
- screen panel 102 can include features for attaching to a support system, such as one or more mounting bosses 114 (see, e.g., FIG. 4).
- screen panel 102 may further include a structural reinforcing frame (not shown) or a frame for locating ceramic aperture inserts 106.
- a ceramic aperture insert positioning frame can be used to create and maintain a certain spacing and pattern of the ceramic aperture inserts 110.
- the positioning frame can be made of steel, aluminum, or more preferably polymer, or most preferably fiber reinforced polymer composite.
- the positioning frame can contain features such as tabs or grooves that engage with the ceramic aperture inserts 110.
- the ceramic aperture insert positioning frame may be at least partially embedded within the polymer matrix 112.
- ceramic aperture inserts 110 can be incorporated into screen panel 102 and may extend around the entire perimeter of the apertures 106. Therefore, the aperture size and shapes maybe defined by the characteristics of the openings in the ceramic aperture inserts 110.
- the composite screen panel 102 can have defined dimensions and one or more ceramic aperture inserts 110 can be arranged in a defined pattern configured for improved overall screening process performance. For example, as illustrated in FIG. 1, apertures 106 are substantially circular and are each fitted with circular ceramic aperture inserts 110.
- ceramic aperture inserts 110 only extend through a portion of the height of screen panel 102.
- ceramic aperture inserts 110 may define a height that is less than 1/2, less than 1/4, less than 1/8, or less, than a height of screen panel 102 as measured along the vertical direction V.
- ceramic aperture inserts 110 may extend to the entire thickness or height of screen panel 102.
- the height of ceramic aperture inserts 110 may be defined relative to the average aperture dimension, e.g., such as the width measured along the lateral direction L.
- the height of ceramic aperture inserts 110 may be less than 1/2 of the aperture width, less than 1/4 of the aperture width, less than 1/8 of the aperture width, or less.
- the ratio of the insert height to the aperture size (e.g., width) and the ratio of the insert height to the height of screen panel 102 may vary while remaining within the scope of the present subject matter, e.g., based at least in part on the tendency or lack of tendency for the rocks or particles to get stuck or “peg” or “plug” the apertures 106.
- the ceramic aperture inserts 110 can be made of ceramic material such as alumina, aluminum oxide, zirconia, silicon carbide, tungsten carbide, diamond, or blends of such materials chosen for their wear resistance.
- the ceramic aperture insert can define a three-dimensional volume with a shape comprising an upper surface, a lower surface and an outer perimeter surface. At least one hollow opening extends through the volume from the upper surface to the lower surface forming an aperture.
- screen panel 102 may generally define a screening surface 104 that is a substantially planar surface configured for receiving the mixture of particulate material.
- screening surface 104 may be positioned above and opposite a bottom side 122 of screen panel 102 along the vertical direction V.
- each aperture 106 may be defined by an aperture wall 124 of screen panel 102 and may extend through screen panel 102 substantially along the vertical direction V.
- aperture 106 may extend from an aperture inlet 126 which is substantially coplanar with screening surface 104 and an aperture outlet 128 that is substantially coplanar with a bottom side 122 of screen panel 102.
- material that is small enough to fit through aperture 106 may fall under the force of gravity through aperture inlet 126, into aperture 106, and out of aperture 106 through aperture outlet 128.
- ceramic aperture inserts 110 may be embedded within, seated into, or mounted to screen panel 102 (e.g., or more particularly within the polymer matrix 112 of screen panel 102) in any suitable manner.
- screen panel 102 may generally define insert recesses 130 that are sized and configured for receiving ceramic aperture inserts 110. More specifically, according to the illustrated embodiment, insert recesses 130 may be defined above aperture walls 124 and may be defined such that screen panel 102 defines a support shoulder 132 that is positioned below screening surface 104 along the vertical direction V, such that a bottom face 134 of ceramic aperture inserts 110 is seated on support shoulder 132.
- a top face 136 of ceramic aperture insert 110 may be flush with screening surface 104 (e.g., may be coplanar with screening surface 104).
- top face 136 of ceramic aperture inserts 110 may extend slightly above screening surface 104 along the vertical direction V.
- top face 136 of ceramic aperture insert 110 may at least partially define screening surface 104 of screen panel 102.
- ceramic aperture inserts 110 may further define an inner face 140 that at least partially defines aperture 106.
- inner face 140 may be directly adjacent and form at least a partial boundary of aperture 106.
- inner face 140 of ceramic aperture inserts 110 may sit substantially flush with aperture wall 124 of screen panel 102.
- inner face 140 and/or aperture wall 124 may be tapered to define a relief angle 142 relative to the vertical direction V.
- aperture inlet 126 may generally have a smaller cross-sectional area than aperture outlet 128, e.g., such that relief angle 142 may facilitate the easy exit of particles passing through screen panel 102.
- relief angle 142 may be between about 0.5° and 20°, between about 1° and 10°, between about 3° and 5°, or about 4° relative to the vertical direction V.
- aperture 106 is illustrated as being tapered at a fixed angle, it should be appreciated that according to alternative embodiments, aperture 106 may be stepped or have any other suitable cross-sectional geometry or profile while remaining within the scope of the present subject matter.
- the polymer matrix 112 of screen panel 102 and the ceramic aperture inserts 110 generally define an upper screening surface 104 and extend substantially within a horizontal plane (e.g., defined by the lateral direction L and the transverse direction T).
- the polymer matrix 112 and ceramic aperture inserts 110 collectively define each aperture 106 and the ceramic aperture inserts 110 may be particularly suited to prevent wear or abrasion on the edges surrounding aperture inlet 126, such that the size, shape, and geometry of apertures 106 may remain relatively constant over the lifetime of screen panel 102.
- ceramic aperture inserts 110 are formed from a single piece and are circular or rectangular in cross-sectional profile. In this regard, ceramic aperture inserts 110 may extend around an entire perimeter of aperture 106 to form a full enclosure around the aperture 106.
- ceramic aperture insert shapes can include hollow cylinders, rings, eyelets, squares, rectangles, or modifications thereof.
- each ceramic aperture insert 110 may be formed from a plurality of insert segments (identified herein generally by reference numeral 150) that collectively form the ceramic aperture insert 110.
- the plurality of insert segments 150 may generally be positioned around the perimeter 152 of each aperture 106 such that at least one perimeter gap 154 is defined between adjacent segments 150.
- the ceramic aperture insert 110 can include four separate insert segments 150 (e.g., a first segment, a second segment, a third segment, and a fourth segment) that fit together to line the perimeter 152 of the aperture 106.
- the ceramic aperture insert 110 can be divided into more or fewer segments 150. For instance, as shown in FIGS. 9 and 11, the ceramic aperture insert 110 can be divided into six separate segments 150 that fit together to line the perimeter of the aperture 106.
- the different segments 150 of the ceramic aperture insert 110 can be spaced apart from one another by perimeter gaps 154 that are defined between adjacent segments 150.
- perimeter gaps 154 may be eliminated and adjacent segments 150 may contact or butt directly up to each other.
- insert segments 150 may vary in order to achieve various performance objectives of a particular screen panel 102. Aspects of the present subject matter are not restricted to any particular configuration of insert segments 150 illustrated herein. According to an example embodiment, as best illustrated in FIGS. 4, 8, 9, and 11, insert segments 150 may be positioned along one or more edges of the aperture profile. More specifically, aperture 106 may have a rectangular profile (e.g., as defined within a horizontal plane or a plane that is coplanar to screening surface 104). According to the illustrated embodiment, insert segments 150 may be positioned along the edges 160 of these rectangular profiles. In addition, perimeter gaps 154 may generally be defined in the comers 162 of the rectangular profile of apertures 106.
- perimeter gaps 134 may also be defined between multiple insert segments 150 that are positioned along a single edge 160.
- insert segments 150 may be curved or angled at approximately 90° and positioned within comers 162 of apertures 106.
- perimeter gaps 154 may be defined along edges 160 of aperture 106, e.g., between the ends of insert segments 150.
- screen panel 102 may further define one or more panel extensions 164 that generally protrude into apertures 106.
- panel extensions 164 may be the portion of the polymer matrix 112 of screen panel 102 that extend into apertures 106 and that serve to form the perimeter gap 154 between adjacent insert segments 150.
- panel extensions 164 may generally prevent large particulates from passing through aperture 106 while permitting some flexibility for moderate size particulates.
- perimeter gap 154 may generally be filled with a polymeric material, e.g., a portion of screen panel 102. In this manner, screen panel 102 may fill at least one of the perimeter gaps 154 such that inner face 140 of insert segments 156 substantially flush with aperture wall 124 of screen panel 102.
- insert segments 150 may form greater than 60%, greater than 70%, greater than 80%, greater than 90%, or greater than 95% of the total linear perimeter 152 of aperture 106.
- insert segments 150 may form greater than 60%, greater than 70%, greater than 80%, greater than 90%, or greater than 95% of the total linear perimeter 152 of aperture 106.
- an average gap length 170 may be defined as the linear distance of the perimeter gaps 154 as measured along the perimeter 152 of aperture 106.
- an average insert length 172 may be measured as the average length of insert segments 150 as measured along the perimeter 152 of aperture 106.
- the average gap length 170 may be less than 1/2 of the average insert length 172, less than 1/4 of the average insert length 172, less than 1/8 of the average insert length 172, less than 1/16 of the average insert length 172, or less.
- screen panel 102 may use various mechanisms and features to ensure ceramic aperture inserts 110 are securely and firmly embedded within screen panel 102.
- the surfaces of ceramic aperture inserts may be treated with a bonding agent to facilitate adhesion to the polymer matrix 112 of screen panel 102.
- Bonding agents can include any suitable material but, in some embodiments, can be silane based.
- commercial bonding agents for ceramic to rubber bonding may include Chemi ok® 6411 with Chemi ok® 144 primer or Cilbond® 24.
- a bonding agent may include Chemlok® 213 or Cilbond® 48 or Cilbond® 49SF.
- Other suitable bonding agents are possible and within the scope of the present subject matter.
- screen panel 102 and ceramic aperture inserts 110 may define complementary recesses and/or protrusions that are intended to provide mechanical interlocking of the two components for securing ceramic aperture inserts 110 within the polymer matrix 112 of screen panel 102.
- screen panel 102 may generally define one or more locking recesses 180 that are defined around aperture 106 or surrounding insert recesses 130 below screening surface 104 along the vertical direction V.
- ceramic aperture inserts 110 may define one or more complementary protruding features 182 that are generally configured for receipt with in the one or more locking recesses 180 to secure ceramic aperture insert 110 within screen panel 102.
- polymer matrix 112 may flow, form, and cure around complementary protruding features 180 to provide secure mechanical engagement of ceramic aperture inserts 110 within screen panel 102.
- the one or more complementary protruding features 182 may be offset from a center of ceramic aperture insert 110 or insert segment 150. More specifically, as best shown on insert segment 150 illustrated in FIG. 7, complementary protruding feature 182 may extend from an engaging face 184 of insert segment 150 (e.g., opposite inner face 140 within a horizontal plane). Complementary protruding feature 182 may be offset along the elongated dimension of engaging face 184. In this manner, as best shown in FIG. 8, insert segments may be positioned immediately adjacent each other on adjacent apertures 106 while minimizing the space there between, e.g., resulting in a smaller bridge between apertures 106 and better screening performance.
- insert segments 150 as defining protruding features 182 and screen panel 102 as defining locking recesses
- these two features could be swapped or alternated while remaining within the scope of the present subject matter.
- the number, size, geometry, and positioning of such engaging features may vary without departing from the scope of the present subject matter.
- the ceramic aperture insert 110 shape can include additional features.
- the ceramic aperture insert 110 can include one or more bumps, tabs, rings, or lips that extend outward from the outer perimeter surface to enable predetermined spacing between adjacent ceramic inserts.
- the ceramic aperture insert 110 can include one or more bumps, tabs, rings, lips, indentations, or grooves extending from the outer perimeter surface to enable mechanical interlocking with a ceramic aperture insert positioning frame.
- the ceramic aperture insert can include one or more bumps, tabs, rings, lips, indentations, or grooves extending from the outer perimeter surface to enable mechanical interlocking with the polymer matrix 112 of screen panel 102.
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- Combined Means For Separation Of Solids (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PE2023001924A PE20240978A1 (en) | 2020-12-18 | 2021-12-16 | SCREENING PANEL WITH CERAMIC COATED OPENINGS |
CA3202750A CA3202750A1 (en) | 2020-12-18 | 2021-12-16 | Ceramic lined aperture screening panel |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US202063127551P | 2020-12-18 | 2020-12-18 | |
US63/127,551 | 2020-12-18 | ||
US17/551,456 US11648588B2 (en) | 2020-12-18 | 2021-12-15 | Ceramic lined aperture screening panel |
US17/551,456 | 2021-12-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022133071A1 true WO2022133071A1 (en) | 2022-06-23 |
Family
ID=80112471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2021/063775 Ceased WO2022133071A1 (en) | 2020-12-18 | 2021-12-16 | Ceramic lined aperture screening panel |
Country Status (4)
Country | Link |
---|---|
CA (1) | CA3202750A1 (en) |
CL (1) | CL2023001815A1 (en) |
PE (1) | PE20240978A1 (en) |
WO (1) | WO2022133071A1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB729938A (en) * | 1952-09-03 | 1955-05-11 | Samuel Royston Griffin | Improvements in and relating to screen plates more particularly for the treatment ofmetallic ores |
DE1233239B (en) * | 1962-02-09 | 1967-01-26 | Ferdinand Mohr Hartstahlvertri | Perforated screen |
US3900393A (en) * | 1973-11-05 | 1975-08-19 | Randtron | Rubber grommet array for sizing screens |
DE2532375A1 (en) * | 1975-07-19 | 1977-02-10 | Schade Maschf Gustav | Sieve plate with wear resistant coating - has coating applied round holes only |
EP2290160A1 (en) * | 2007-04-30 | 2011-03-02 | Voith Patent GmbH | Method for producing a filter, in particular a rigid filter for processing fibrous suspensions used for creating paper |
US8887921B2 (en) * | 2010-01-14 | 2014-11-18 | Tega Industries Limited | Screen panel with wear protective apertures |
DE102017211958A1 (en) * | 2017-07-12 | 2019-01-17 | Thyssenkrupp Ag | Sieve segment with wear protection elements |
-
2021
- 2021-12-16 PE PE2023001924A patent/PE20240978A1/en unknown
- 2021-12-16 WO PCT/US2021/063775 patent/WO2022133071A1/en not_active Ceased
- 2021-12-16 CA CA3202750A patent/CA3202750A1/en active Pending
-
2023
- 2023-06-19 CL CL2023001815A patent/CL2023001815A1/en unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB729938A (en) * | 1952-09-03 | 1955-05-11 | Samuel Royston Griffin | Improvements in and relating to screen plates more particularly for the treatment ofmetallic ores |
DE1233239B (en) * | 1962-02-09 | 1967-01-26 | Ferdinand Mohr Hartstahlvertri | Perforated screen |
US3900393A (en) * | 1973-11-05 | 1975-08-19 | Randtron | Rubber grommet array for sizing screens |
DE2532375A1 (en) * | 1975-07-19 | 1977-02-10 | Schade Maschf Gustav | Sieve plate with wear resistant coating - has coating applied round holes only |
EP2290160A1 (en) * | 2007-04-30 | 2011-03-02 | Voith Patent GmbH | Method for producing a filter, in particular a rigid filter for processing fibrous suspensions used for creating paper |
US8887921B2 (en) * | 2010-01-14 | 2014-11-18 | Tega Industries Limited | Screen panel with wear protective apertures |
DE102017211958A1 (en) * | 2017-07-12 | 2019-01-17 | Thyssenkrupp Ag | Sieve segment with wear protection elements |
Also Published As
Publication number | Publication date |
---|---|
CA3202750A1 (en) | 2022-06-23 |
CL2023001815A1 (en) | 2024-01-12 |
PE20240978A1 (en) | 2024-05-07 |
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