The present invention is directed to a screen surface forming system that includes a plurality of individual screen elements that may be readily removed and replaced with one or more screening elements to readily modify one or more characteristics of the screen surface. In a preferred embodiment, the screen surface is formed by at least one screen element formed from mesh wire and another screen element formed from plastic. This preferred embodiment includes a support system for providing the necessary structural stability to prevent deformation of one or more screen elements that would deform in prior art screen systems due to the insufficient structural stability of the screen elements to support the weight of the product being screened without deforming. Hence, this preferred embodiment allows the screen surface forming system to utilize screen elements that typically could not be used to screen heavier product as the screen elements would deform due to the weight of the product.
Screen surfaces formed from a plurality of screen elements are known. For example, the Isenmann WS-85 screen system includes a plurality of screen elements that can be removed and replaced. This screen system can use screen elements formed from plastic, namely polyurethane and metal screen elements. The Isenmann WS-85 screen system is disclosed in U.S. Pat. No. 4,670,136. However, this screen system has one or more significant disadvantages. For example, screen elements, particularly the metal screen elements can deform, e.g., sag between existing longitudinally extending carriers of the screen deck, due to the weight of the product being processed. Deformation of the screen element can render the screen element practically useless and in any event significantly less efficient. Therefore, a need exists for a screen system that will prevent deformation of the screen elements regardless of the material the screen element is formed from.
An object of the present invention is to provide a novel and unobvious screen system that includes a plurality of screen elements that can be readily removed and replaced to readily vary one or more characteristics of the screen surface formed by the screen system.
Another object of a preferred embodiment of the present invention is to provide a screen system that can accommodate screen elements of different structural stability and yet prevent deformation of any of the screen elements including screen elements that typically would be deformed due to the weight of the product being screened.
A further object of a preferred embodiment of the present invention is to provide a screen system with a support system for supporting one or more screen elements of the screen system where the support system prevents deformation of one or more screen elements that typically would deform due to the weight of the product being screened.
Yet another object of a preferred embodiment of the present invention is to provide a screen system with a support system for supporting one or more screen elements of the screen system where the support system can be readily and easily installed.
Still another object of a preferred embodiment of the present invention is to provide a screen system with a support system for supporting one or more screen elements of the screen system where the location of the support system can be readily and easily varied to support the screen elements that would typically deform due to the weight of the product being screened.
Yet still another object of a preferred embodiment of the present invention is to provide a screen system with a support system for supporting one or more screen elements of the screen system where the support system does not adversely affect the throughput of the screen system.
A further object of a preferred embodiment of the present invention is to provide a screen system with a support system for supporting one or more screen elements of the screen system where the support system is configured to prevent wear of the one or more screen elements to prolong the useful life of the one or more screen elements.
Yet still a further object of a preferred embodiment of the present invention is to provide a screen system with a support system for supporting one or more screen elements of the screen system where support elements of the support system can be readily modified to provide additional support to prevent deformation of one or more screen elements.
A further object of a preferred embodiment of the present invention is to provide a screen system that can be readily, securely and removably attached to carriers of a screening deck of a vibrating screen.
It must be understood that no one embodiment of the present invention need include all of the aforementioned objects of the present invention. Rather, a given embodiment may include one or none of the aforementioned objects. Accordingly, these objects are not to be used to limit the scope of the claims of the present invention.
In summary, a preferred embodiment of the present invention is directed to a screening support system for use with a vibrating screen for conducting material in a longitudinal direction while screening. The vibrating screen has a screening deck including a plurality of longitudinal carriers for carrying the screening support system. The screening support system includes a plurality of longitudinally extending support members. Each of the plurality of longitudinally extending support members are configured to be removably connected to a corresponding one of the plurality of longitudinal carriers of the screening deck of the vibrating screen. The plurality of longitudinally extending support members include a first longitudinally extending support member and a second longitudinally extending support member. The first longitudinally extending support member is spaced from the second longitudinally extending support member to receive a screening element therebetween. A plurality of transversely extending support members are configured to be removably connected to the first longitudinally extending member and the second longitudinally extending member. The plurality of transversely extending support members are disposed such that when a screen element is positioned between the first longitudinally extending support member and the second longitudinally extending support member each of the plurality of transversely extending support members are in contact with the screening element substantially along a width of the screening element to prevent the screening element from sagging.
Another preferred embodiment of the present invention is directed to a screening support system for use with a vibrating screen for screening material. The vibrating screen having a screening deck including a plurality of carriers for carrying the screening support system. The screening support system includes a plurality of screening element edge support members for supporting a plurality of screening elements having a plurality of openings formed therein through which a material to be screened passes. The plurality of screening element edge support members includes a first screening element edge support member having a first connecting member for removably connecting the first screening element edge support member to one of the plurality of carriers. The first screening element edge support member has a first outwardly extending segment for supporting thereon a first edge of a first screening element. A plurality of recesses are formed in the first outwardly extending segment. Each of the plurality of recesses is configured to receive a portion of one of a plurality of screening element section support members such that the first screening element edge support member extends at an angle to each of the plurality of screening element section support members. The plurality of screening element edge support members includes a second screening element edge support member connected to the first screening element edge support member to support the first edge of the first screening element between the first screening element edge support member and the second screening element edge support member.
A further preferred embodiment of the present invention is directed to a screening support system for use with a vibrating screen for screening material. The vibrating screen has a screening deck including a plurality of carriers for carrying the screening support system. The screening support system includes a plurality of screening element edge support members for supporting a plurality of screening elements having a plurality of openings formed therein through which a material to be screened passes. The plurality of screening element edge support members includes a first screening element edge support member having a first connecting member for removably connecting the first screening element edge support member to one of the plurality of carriers. The first screening element edge support member has a first outwardly extending segment for supporting thereon a first edge of a first screening element. A plurality of recesses are formed in the first outwardly extending segment. Each of the plurality of recesses being configured to receive a portion of one of a plurality of screening element section support members such that the first screening element edge support member extends at an angle to each of the plurality of screening element section support members.
Still a further preferred embodiment of the present invention is directed to a screening support system for use with a vibrating screen for screening material. The vibrating screen has a screening deck including a plurality of carriers for carrying the screening support system. The screening support system includes a plurality of longitudinally extending screening element support members for supporting a plurality of screening elements having a plurality of openings formed therein through which a material to be screened passes. The plurality of longitudinally extending screening element support members includes a first longitudinally extending screening element support member having a first connecting member for removably connecting the first longitudinally extending screening element support member to one of the plurality of carriers. A plurality of transversely extending screening element support members extend from the first longitudinally extending screening element support member for supporting at least one of the plurality of screening elements. Each of the plurality of transversely extending screening element support members has a first vertical surface. The first vertical surface of each of the plurality of transversely extending screening element support members abuts and extends along a first vertically extending side surface of the first longitudinally extending screening element edge support member and a first vertically extending side surface of the one of the plurality of carriers.
Yet a further preferred embodiment of the present invention is directed to a screening support system for use with a vibrating screen for screening material. The vibrating screen has a screening deck including a plurality of carriers for carrying the screening support system. The screening support system includes a plurality of screening element edge support members for supporting a plurality of screening elements having a plurality of openings formed therein through which a material to be screened passes. The plurality of screening element edge support members include a first screening element edge support member having a first connecting member for removably connecting the first screening element edge support member to one of said plurality of carriers. The first screening element edge support member has a first outwardly extending segment for supporting thereon a first edge of a first screening element. The first connecting member extends downwardly from a lower surface of the first outwardly extending segment. The first connecting member is permanently fixed such that the first connecting member cannot move relative to the first outwardly extending segment. The first connecting member has a bore for receiving a removable fastener. The plurality of screening element edge support members include a second screening element edge support member connected to the first screening element edge support member to support the first edge of the first screening element between said the screening element edge support member and the second screening element edge support member.
The preferred forms of the invention will now be described with reference to
Referring to
Screen system A includes a plurality of longitudinally extending carriers 2 that form a screen deck or substructure. Preferably, carriers 2 are formed from metal. However, any suitable material may be used. While only two carriers 2 are shown in
Referring to
Screen system A includes one or more screen body support members 20 that prevent a corresponding screen element from sagging. As seen in
Referring to
Referring to
Referring to
Referring to
Referring to
First screen edge element support member 70 is preferably configured to be removably connected to a corresponding carrier 2. Specifically, as shown in
Support member 70 is removably secured to a corresponding carrier 2 by inserting connecting members 72 into slot 4 of carrier 2. As seen in
After support member 70 is attached to carrier 2, fasteners 84 are inserted into bores 82 such that head 88 of fasteners 84 is disposed just below the bottom 90 of centrally located recess 92. Preferably, fasteners 84 are pounded into bore 82 with any suitable tool causing the threads of fastener 84 to embed in the wall of the bore 82. This process in turn causes connecting segments 76 and 78 to move outwardly away from each other. Once the fastener is positioned as described, the connecting segments 76 and 78 cannot move relative to each other thereby securely fastening support member 70 to carrier 2. Support member 70 can be readily detached from carrier 2 by simply removing fasteners 84.
Preferably, recess 92 extends longitudinally along substantially the entire length of support member 70. Preferably, recess 92 includes a plurality of saw-tooth set backs 94 to mate with the downwardly extending protrusion of support member 7 to removably secure support member 7 to support member 70.
Referring to
While this invention has been described as having a preferred design, it is understood that the preferred design can be further modified or adapted following in general the principles of the invention and including but not limited to such departures from the present invention as come within the known or customary practice in the art to which the invention pertains. The claims are not limited to the preferred embodiments described in connection with
The subject patent application is a continuation-in-part of U.S. patent application Ser. No. 13/067,890 filed on Jul. 5, 2011, the entire contents of which are incorporated herein by reference.
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TEMA Isenmann, Inc.: WS85 Screens; WS85 Polyurethane Systems brochure, Lexington, KT, 2005. |
Number | Date | Country | |
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20150021239 A1 | Jan 2015 | US |
Number | Date | Country | |
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Parent | 13607890 | Jul 2011 | US |
Child | 14456503 | US |