Feb. 13, 1934.
`Feb. 13, 1934.
`
`H. R. RAFTON
`H. R. RAFTON
`
`1,947,307
`1,947,307
`
`MEANS FOR SUPPORTING WIRE CLOTH
`MEANS FOR SUPPORTING WIRE CLOTH
`
`Original. Filed Jan. 21, 1931
`Original. Filed Jan. 21, 1931
`
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`
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`
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`
`Page 1 of 4
`
`Derrick 2030
`IPR2016-00642
`Axon EP, Inc. and Screen Logix, LLC v. Derrick Corporation
`
`

`
`Patented Feb. 13, 1934
`Patented Feb. 13, 1934
`
`1,947,307
`1,947,307
`
`UNITED STATES PATENT OFFICE
`UNITED STATES PATENT OFFICE
`
`1,947,307
`1,947,307
`MEANS FOR SUPPORTING WIRE CLOTH
`MEANS FOR SUPPORTING WIRE CLOTH
`Harold Robert Rafton, Andover, Mass., assignor
`Harold Robert Rafton, Andover, Mass., assignor
`to Rafton Engineering Corporation, a corpora-
`to Rafton Engineering Corporation, a corpora-
`tion of Massachusetts
`tion of Massachusetts
`Application January 21, 1931, Serial No. 510,268
`Application January 21, 1931, Serial No. 510,268
`Renewed September 2, 1933
`Renewed September 2, 1933
`11 Claims. (CL 209-401)
`11 Claims. (CL 209-401)
`filed January 14th, 1930, I have disclosed a plated
`filed January 14th, 1930, I have disclosed a plated
`My invention relates to improved means for
`My invention relates to improved means for
`supporting screen wire cloth in commercial
`fine mesh wire cloth which I have termed "ultra
`supporting screen wire cloth in commercial
`fine mesh wire cloth which I have termed "ultra
`screening machines and the like.
`wire cloth". This ultra wire cloth, (i. e. ultra
`screening machines and the like.
`wire cloth". This ultra wire cloth, (i. e. ultra
`wire screening cloth), although considerably
`The principal object of my invention is to pro-
`The principal object of my invention is to pro-
`wire screening cloth), although considerably
`5 vide means for prolonging the life of the wire
`5 vide means for prolonging the life of the wire
`more durable than ordinary very fine mesh wire 10
`more durable than ordinary very fine mesh wire OS
`cloth used in commercial screening machines.
`cloth with openings of similar size, was also found
`cloth with openings of similar size, was also found
`cloth used in commercial screening machines.
`An important object is to provide means for
`to be comparatively short lived when employed
`to be comparatively short lived when employed
`An important object is to provide means for
`with the usual supporting means (i. e. coarser
`greatly prolonging the life of fine mesh wire
`with the usual supporting means (i. e. coarser
`greatly prolonging the life of fine mesh wire
`wire cloth backing) in the customary manner in
`cloth, and particularly of ultra wire cloth, used
`cloth, and particularly of ultra wire cloth, used
`wire cloth backing) in the customary manner in
`commercial screening machines, for example in 05
`commercial screening machines, for example in 66
`
`10 in commercial screening machines, thus render-10 in commercial screening machines, thus render-
`a gyratory riddle screen pan or frame such as
`ing the use of such cloth economically feasible
`a gyratory riddle screen pan or frame such as
`ing the use of such cloth economically feasible
`is discloseg in my copending application Serial
`when used for industrial screening.
`is disclosed in my copending application Serial
`"when used for industrial screening.
`No. 359,943, filed May 2nd, 1929.
`A further object is to provide a relatively soft
`No. 359,943, filed May 2nd, 1929.
`A further object is to provide a relatively soft
`A close examination of an ultra wire cloth so
`A close examination of an ultra wire cloth so
`
`supporting means for ultra wire screening cloth supporting means for ultra wire screening cloth
`used until worn out, revealed the fact that the TO
`15 to greatly lengthen the life thereof by materially
`used until worn out, revealed the fact that the TO
`15 to greatly lengthen the life thereof by materially
`destruction of the cloth had not been brought
`destruction of the cloth had not been brought
`
`reducing the wear caused by the contact between reducing the wear caused by the contact between
`about by the passage of material therethrough,
`the cloth and the supporting means therefor.
`about by the passage of material therethrough,
`the cloth and the supporting means therefor.
`but rather by the wearing effect of the backing
`but rather by the wearing effect of the backing
`A further object is to provide satisfactory
`A further object is to provide satisfactory
`wire cloth on the ultra wire cloth.
`wire cloth on the ultra wire cloth.
`means for supporting ultra wire cloth in gyratory
`means for supporting ultra wire cloth in gyratory
`20 riddle screen pans.
`In an endeavor to lengthen the life of ultra T6
`20 riddle screen pans.
`In an endeavor to lengthen the life of ultra T6
`wire cloth, such cloth was used without any sup-
`wire cloth, such cloth was used without any sup-
`Other objects and advantages of the invention
`Other objects and advantages of the invention
`port or backing wire, but the cloth did not prove
`port or backing wire, but the cloth did not prove
`will become apparent during the course of the
`will become apparent during the course of the
`strong enough for use in this manner and quickly
`following description.
`strong enough for use in this manner and quickly
`following description.
`split or tore, sometimes in the main part of the
`split or tore, sometimes in the main part of the
`In commercial screening machines it is cus-
`In commercial screening machines it is cus-
`cloth exposed to the material screened, and some- GO
`cloth exposed to the material screened, and some- GO
`25 ternary to stretch a wire cloth so that a substan-
`25 ternary to stretch a wire cloth so that a substan-
`times at the line of attachment to the screening
`times at the line of attachment to the screening
`tially taut surface, fiat, cylindrical, or the like, is
`tially taut surface, fiat, cylindrical, or the like, is
`machine. It was manifest that an unsupported
`machine. It was manifest that an unsupported
`presented for screening. In the coarser meshes
`presented for screening. In the coarser meshes
`cloth was not sufficiently strong either to sustain
`cloth was not sufficiently strong either to sustain
`the cloth usually is of sufficient strength to re-
`the cloth usually is of sufficient strength to re-
`for any length of time the weight of material
`for any length of time the weight of material
`quire no support, but in the finer meshes, for
`quire no support, but in the finer meshes, for
`thereon under the influence of vibration or the
`thereon under the influence of vibration or the
`30 example 100 mesh or finer, it is customary to
`30 example 100 mesh or finer, it is customary to
`strains at the line of attachment caused by such
`strains at the line of attachment caused by such
`provide a supporting means for the fine mesh
`provide a supporting means for the fine mesh
`vibration.
`vibration.
`cloth, usually a foraminate supporting means
`cloth, usually a foraminate supporting means
`After considerable experimentation it was
`After considerable experimentation it was
`such as other wire cloth of relatively coarser
`such as other wire cloth of relatively coarser
`found that by providing a support for the ultra
`found that by providing a support for the ultra
`mesh. Such supporting means serves to 'support
`mesh. Such supporting means serves to 'support
`wire cloth substantially softer than the ultra wire
`wire cloth substantially softer than the ultra wire
`35 the screening medium while at the same time
`85 the screening medium while at the same time
`cloth the life of such cloth was greatly prolonged,
`cloth the life of such cloth was greatly prolonged,
`permitting the passage of material therethrough.
`permitting the passage of material therethrough.
`so much so that it now becomes economically
`so much so that it now becomes economically
`For example, where 150 mesh wire cloth is used
`For example, where 150 mesh wire cloth is used
`feasible to use ultra wire cloth for industrial
`feasible to use ultra wire cloth for industrial
`in a commercial screening machine, e. g. in the
`in a commercial screening machine, e. g. in the
`screening. Examination of pieces of such cloth
`screening. Examination of pieces of such cloth
`screen pan of a gyratory riddle, a supporting or
`screen pan of a gyratory riddle, a supporting or
`so supported and worn out in use, reveals the 96
`so supported and worn out in use, reveals the 96
`40 backing wire cloth of 24 mesh is suitable for use.
`40 backing wire cloth of 24 mesh is suitable for use.
`fact that the cloth actually has been worn out
`fact that the cloth actually has been worn out
`In order to provide as smooth a backing as feasi-
`In order to provide as smooth a backing as feasi-
`by the passage of material therethrough, and not
`ble, it is customary to use rolled wire cloth as the
`by the passage of material therethrough, and not
`ble, it is customary to use rolled wire cloth as the
`as heretofore by wear from the supporting means.
`as heretofore by wear from the supporting means.
`backing.
`backing.
`There are a number of substantially softer
`The practice of using relatively fine mesh wire
`There are a number of substantially softer
`The practice of using relatively fine mesh wire
`45 cloth superposed on coarser mesh wire cloth has
`supporting means that are suitable, such as rela- 100
`supporting means that are suitable, such as rela- 100
`45 cloth superposed on coarser mesh wire cloth has
`tively soft supporting metal. For example, if a
`proved satisfactory in practice, but when an at-
`tively soft supporting metal. For example, if a
`proved satisfactory in practice, but when an at-
`tempt was made to employ this procedure with
`nickel plated ultra wire cloth be used, a silver,
`nickel plated ultra wire cloth be used, a silver,
`tempt was made to employ this procedure with
`very mesh wire cloth, which as is well known
`or heavily silver plated, supporting means may
`very mesh wire cloth, which as is well known
`or heavily silver plated, supporting means may
`is markedly less strong and less wear resistant as
`be employed. Similarly, fibrous supporting
`is markedly less strong and less wear resistant as
`be employed. Similarly, fibrous supporting
`means such as wood, cords, or textile fabric may 106
`means such as wood, cords, or textile fabric may 105
`. 50 the very fine meshes are reached, it was found
`50 the very fine meshes are reached, it was found
`be used, but I have found the most suitable sup-
`that such cloth wore out with extreme rapidity,
`be used, but I have found the most suitable sup-
`that such cloth wore out with extreme rapidity,
`porting means to be a soft resilient material such
`and in fact so quickly as to make it utterly in-
`porting means to be a soft resilient material such
`and in fact so quickly as to make it utterly in-
`feasible from an economic standpoint to employ
`as rubber, balata, gutta percha or the like, and
`as rubber, balata, gutta percha or the like, and
`feasible from an economic standpoint to employ
`of these materials it is preferred that rubber,
`of these materials it is preferred that rubber,
`it for screening.
`it for screening.
`preferably soft rubber, be employed. Several 110
`preferably soft rubber, be employed. Several 110
`
`In my copending application Serial No. 420,794, In my copending application Serial No. 420,794,
`
`55 (cid:9)
`55 (cid:9)
`
`Derrick 2030
`IPR2016-00642
`Axon EP, Inc. and Screen Logix, LLC v. Derrick Corporation
`
`Page 2 of 4
`
`

`
`2 (cid:9)
`
`90
`90
`
`2 (cid:9)
`1,947,307
`1,947,307
`illustrated. The base material thus employed is
`specific means for employing such soft rubber
`illustrated. The base material thus employed is
`specific means for employing such soft rubber
`subjected to a relatively heavy rolling action at
`will be referred to in detail later.
`subjected to a relatively heavy rolling action at
`will be referred to in detail later.
`In the accompanying drawing I have shown
`the points 20 (see Figure 2) to flatten the strands
`In the accompanying drawing I have shown
`the points 20 (see Figure 2) to flatten the strands
`
`two advantageous means for supporting the wire two advantageous means for supporting the wire
`
`of wire and thus provide flat surfaces of substan-of wire and thus provide fiat surfaces of substan-
`tial area in parallel relation to the wire cloth 80
`tial area in parallel relation to the wire cloth 80
`cloth. In this showing,
`cloth. In this showing,
`
`to be supported, as indicated by the numeral 21 to be supported, as indicated by the numeral 21
`
`Figure 1 is a central vertical sectional view Figure 1 is a central vertical sectional view
`of a gyratory riddle screen pan,
`in Figure 3. The base material is then coated
`in Figure 3. The' base material is then coated
`of a gyratory riddle screen pan,
`
`with a substantially uniform layer 22 of soft rub-with a substantially uniform layer 22 of soft rub-
`
`Figure 2 is an enlarged fragmentary sectional Figure 2 is an enlarged fragmentary sectional
`ber, preferably through a process of eletrodep-
`view of one form of base material adapted for
`ber, preferably through a process of eletrodep-
`view of one form of base material adapted for
`
`osition commercially known as the "anode proc- 85 osition commercially known as the "anode proc- 85
`
`10 use in making the supporting means, 10 use in making the supporting means,
`Figure 3 is a similar view showing the support-
`Figure 3 is a similar view showing the support-
`ess". The outer surfaces of the rubber obviously
`ess". The outer surfaces of the rubber obviously
`
`ing means complete and in operative position ing means complete and in operative position
`
`will substantially follow the surface contours of will substantially follow the surface contours of
`the rolled base cloth, thus presenting substan-
`the rolled base cloth, thus presenting substan-
`with respect to the wire cloth,
`with respect to the wire cloth,
`Figure 4 is a view similar to Figure 3 showing
`
`tially flat surfaces of substantial area for con- tially fiat surfaces of substantial area for con-
`Figure 4 is a view similar to Figure 3 showing
`15 a modified form of the invention, and,
`15 a modified form of the invention, and,
`tact with the wire cloth to be supported. (cid:9)
`tact with the wire cloth to be supported. (cid:9)
`
`A somewhat modified form of the invention is A somewhat modified form of the invention is
`Figure 5 is a fragmentary plan view of the
`Figure 5 is a fragmentary plan view of the
`modified form of the invention.
`shown in Figure 4 in which there is employed
`modified form of the invention.
`shown in Figure 4 in which there is employed
`Referring to Figure 1, the invention has been
`a perforated metal plate 23 of appropriate thick-
`Referring to Figure 1, the invention has been
`a perforated metal plate 23 of appropriate thick-
`illustrated in connection with a gyratory riddle
`illustrated in connection with a gyratory riddle
`ness such as 20 gauge, with perforations of any
`ness such as 20 gauge, with perforations of any
`suitable size, such as a half inch square. This 95
`screen pan of the type disclosed in my copending
`screen pan of the type disclosed in my copending
`suitable size, such as a half inch square. This 95
`perforated plate is similarly coated with soft rub-
`application Serial No. 359,943, similar to Figure 10
`perforated plate is similarly coated with soft rub-
`application Serial No. 359,943, similar to Figure 10
`therein except that the supply spout is arranged
`ber as at 24 and in each case, the rubber is ap-
`ber as at 24 and in each case, the rubber is ap-
`therein except that the supply spout is arranged
`plied to a suitable thickness such as -116".
`centrally of the cover and the distributing plate
`plied to a suitable thickness such as h".
`centrally of the cover and the distributing plate
`is arranged substantially horizontally, but it will
`The supporting means employed may be of any
`The supporting means employed may be of any
`is arranged substantially horizontally, but it will
`25 become apparent that the invention is not limited
`25 become apparent that the invention is not limited
`suitable design or construction, providing it pre- 100
`suitable design or construction, providing it pre- 100
`in any respect to its use with this particular type
`sents sufficient supporting surface in a plane sub-
`in any respect to its use with this particular type
`sents sufficient supporting surface in a plane sub-
`stantially parallel to that of the ultra wire cloth,
`of apparatus.
`stantially parallel to that of the ultra wire cloth,
`of apparatus.
`Referring again to Figure 1, the numeral 5
`and of sufficient open area to allow the passage
`Referring again to Figure 1, the numeral 5
`and of sufficient open area to allow the passage
`designates the pan of a gyratory riddle, and this
`of material therethrough. Such supporting means
`designates the pan of a gyratory riddle, and this
`of material therethrough. Such supporting means
`20 pan is surrounded in spaced relation thereto by
`30 pan is surrounded in spaced relation thereto by
`
`are illustrated in the drawing, but other forms lit are illustrated in the drawing, but other forms lit
`may be employed, as stated above. For example,
`may be employed, as stated above. For example,
`an outer wall 6 which extends upwardly a sub-
`an outer wall 6 which extends upwardly a sub-
`a grid may be employed, with openings rectangu-
`a grid may be employed, with openings rectangu-
`
`stantial distance above the upper edge of the stantial distance above the upper edge of the
`lar or otherwise, or with spiral openings, but I
`lar or otherwise, or with spiral openings, but I
`pan 5. The pan 5 and outer wall 6 are connected
`pan 5. The pan 5 and outer wall 6 are connected
`prefer to use a foraminate supporting means such
`prefer to use a foraminate supporting means such
`
`by a bottom wall 7, and the pan 5 and walls 6 by a bottom wall 7, and the pan 5 and walls 6
`as the woven or perforated means illustrated in 110
`as the woven or perforated means illustrated in 110
`85 and 7 define a trough into which rejected over-
`85 and 7 define a trough into which rejected over-
`the drawing.
`
`size material from the screen to be described size material from the screen to be described
`the drawing.
`In this connection it may be stated that a
`In this connection it may be stated that a
`overflows over the upper edge of the pan 5. The
`overflows over the upper edge of the pan 5. The
`supporting means made of perforated sheet rub-
`supporting means made of perforated sheet rub-
`rejected material is discharged through an out-
`rejected material is discharged through an out-
`ber has been employed by me, but I have found
`ber has been employed by me, but I have found
`let spout 8.
`let spout 8.
`that such means, after a relatively short time, :11.5
`that such means, after a relatively short time, :115
`40 The wall 6 is provided with a cover 9 having
`40 The wall 6 is provided with a cover 9 having
`does not satisfactorily support the ultra wire
`does not satisfactorily support the ultra wire
`an opening 10 therein above which is arranged
`an opening 10 therein above which is arranged
`cloth unless the rubber be suitably stretched,
`cloth unless the rubber be suitably stretched,
`an inlet spout 11. Material to be screened is fed
`an inlet spout 11. Material to be screened is fed
`supported or reinforced. A foraminate or other
`supported or reinforced. A foraminate or other
`into the device through the spout 11, and a per-
`into the device through the spout 11, and a per-
`forated spreader plate 12, preferably horizon-
`suitable backing of rubber may be supported by
`suitable backing of rubber may be supported by
`forated spreader plate 12, preferably horizon-
`85 tally arranged centrally of the device is disposed
`an independent substantially non-stretching sup- 12C
`an independent substantially non-stretching sup- ",.2C
`45 tally arranged centrally of the device is disposed
`Port, but I prefer to use a rubber supporting means
`beneath the spout 11.
`port, but I prefer to use a rubber supporting means
`beneath the spout 11.
`suitably reinforced, and integral with its rein-
`suitably reinforced, and integral with its rein-
`A wire cloth 13 effects the desired screening
`A wire cloth 13 effects the desired screening
`
`forcement, since such a construction is much forcement, since such a construction is much
`
`action and is supported within the open bottom action and is supported within the open bottom
`of the pan 5 by a supporting element indicated
`simpler and easier to handle.
`of the pan 5 by a supporting element indicated
`simpler and easier to handle.
`
`50 as a whole by the numeral 14. The cloth 13 and 50 as a whole by the numeral 14. The cloth 13 and
`
`As previously stated, I prefer to employ a re- 125 As previously stated, I prefer to employ a re- 125
`supporting means 14 are arranged between a
`supporting means 14 are arranged between a
`inforced rubber coated foraminate supporting
`inforced rubber coated foraminate supporting
`gasket 15 and a ring 16, and the elements re-
`gasket 15 and a ring 16, and the elements re-
`
`means of the character illustrated in the draw-means of the character illustrated in the draw-
`
`ing. It is possible, of course, to apply rubber ing. It is possible, of course, to apply rubber
`ferred to are suitably secured by bolts or other
`ferred to are suitably secured by bolts or other
`
`fastening elements 17 to an inwardly projecting fastening elements 17 to an inwardly projecting
`
`merely to surface areas on that surface of a merely to surface areas on that surface of a
`
`55 flange 18 carried by the pan 5. 55 flange 18 carried by the pan 5.
`
`foraminate metallic or other reinforcing means, 130 foraminate metallic or other reinforcing means, 130
`Whereas the numeral 5 represents the "pan"
`Whereas the numeral 5 represents the "pan"
`
`which is to be in contact with the ultra wire which is to be in contact with the ultra wire
`
`proper of the particular type of screen pan shown proper of the particular type of screen pan shown
`
`cloth, but the use of such a construction is not cloth, but the use of such a construction is not
`in Figure 1, the expressions "screen pan" or
`
`preferred. With such a construction, it will be preferred. With such a construction, it will be
`in Figure 1, the expressions "screen pan" or
`"screen frame" are used herein broadly to indi-
`"screen frame" are used herein broadly to indi-
`
`obvious that the size of the openings in the obvious that the size of the openings in the
`
`60 cate a complete structure such, for example, as 60 cate a complete structure such, for example, as
`foraminate supporting sheet would not be re- 135
`foraminate supporting sheet would not be re- 135
`
`that shown in Figure 1, with the exception of the that shown in Figure 1, with the exception of the
`
`duced. With the preferred construction illus-duced. With the preferred construction illus-
`parts designated as the wire cloth 13, the sup-
`parts designated as the wire cloth 13, the sup-
`trated, the holes in the sheet are made somewhat
`trated, the holes in the sheet are made somewhat
`porting element 14, and the cover 9.
`porting element 14, and the cover 9.
`
`smaller by rubber coating the portions of the smaller by rubber coating the portions of the
`
`Two embodiments of the support 14 are dis-Two embodiments of the support 14 are dis-
`metal formerly defining the holes, but the rubber
`metal formerly defining the holes, but the rubber
`95 closed in Figures 2, 3, 4 and 5, but it will become
`95 closed in Figures 2, 3, 4 and 5, but it will become
`coating does not change the essential foraminate 140
`coating does not change the essential foraminate 140
`apparent that the invention may be embodied
`apparent that the invention may be embodied
`nature of the reinforcing sheet.
`nature of the reinforcing sheet.
`
`in a great number of mechanical forms with in a great number of mechanical forms with
`In the preferred practice of the invention,
`In the preferred practice of the invention,
`
`satisfactory results. It is to be understood there-satisfactory results. It is to be understood there-
`
`therefore, a well rolled coarse mesh wire cloth therefore, a well rolled coarse mesh wire cloth
`fore that the embodiments of the invention illus-
`fore that the embodiments of the invention illus-
`or a perforated metal plate is coated with a thin
`or a perforated metal plate is coated with a thin
`
`70 trated are to be taken merely as examples of 70 trated are to be taken merely as examples of
`
`layer of soft rubber, preferably by the process 145 layer of soft rubber, preferably by the process 145
`means for accomplishing the desired result.
`means for accomplishing the desired result.
`
`of electrodeposition referred to above. An ultra of electrodeposition referred to above. An ultra
`
`Referring to Figure 2 the numeral 19 desig-Referring to Figure 2 the numeral 19 desig-
`wire cloth is then superposed on the rubber coat-
`wire cloth is then superposed on the rubber coat-
`
`nates a standard relatively coarse mesh wire nates a standard relatively coarse mesh wire
`ed foraminate sheet, and smoothed over it, but
`ed foraminate sheet, and smoothed over it, but
`
`screen, for example 2 or 3 mesh, in which strands screen, for example 2 or 3 mesh, in which strands
`preferably not tightly stretched. The ultra wire
`preferably not tightly stretched. The ultra wire
`75 of •wire employed are circular in cross section as
`75 of •wire employed are circular in cross section as
`
`cloth and its rubber coated foraminate support 150 cloth and its rubber coated foraminate support 150
`
`Derrick 2030
`IPR2016-00642
`Axon EP, Inc. and Screen Logix, LLC v. Derrick Corporation
`
`Page 3 of 4
`
`

`
`1,947,307
`1,947,307
`are then placed in a suitable commercial screen-
`screening cloth, and supporting means substan-
`are then placed in a suitable commercial screen-
`screening cloth, and supporting means substan-
`ing device such, for example, as the gyratory rid-
`tially coextensive therewith and having spaces
`ing device such, for example, as the gyratory rid-
`tially coextensive therewith and having spaces
`dle screen pan shown in Figure 1 of the drawing,
`for the passage of material therethrough com-
`dle screen pan shown in Figure 1 of the drawing,
`for the passage of material therethrough com-
`and, after being suitably attached thereto, are
`prising a metallic reinforcing means having a soft
`and, after being suitably attached thereto, are
`prising a metallic reinforcing means having a soft
`ready for use in screening. In the embodiment
`ready for use in screening. In the embodiment
`rubber coating contacting with one face of said 80
`rubber coating contacting with one face of said 80
`of the invention shown in Figure 1, the screen
`of the invention shown in Figure 1, the screen
`cloth.
`cloth.
`pan is inserted into the gyratory riddle and the
`pan is inserted into the gyratory riddle and the
`5. In a screening device, in combination, a wire
`5. In a screening device, in combination, a wire
`material to be screened is introduced into the
`screening cloth, and supporting means substan-
`material to be screened is introduced into the
`screening cloth, and supporting means substan-
`pan through the spout 11 for distribution over
`tially coextensive therewith and comprising a
`pan through the spout 11 for distribution over
`tially coextensive therewith and comprising a
`the surface of the ultra wire cloth. The oversize
`the surface of the ultra wire cloth. The oversize
`foraminate metallic sheet coated with soft rub- 85
`foraminate metallic sheet coated with soft rub- 85
`material is rejected on the cloth surface, and
`material is rejected on the cloth surface, and
`ber on at least one face thereof to provide sup-
`ber on at least one face thereof to provide sup-
`the screened material passes through the cloth
`the screened material passes through the cloth
`porting areas of substantial size to contact with
`porting areas of substantial size to contact with
`and through the openings in the supporting sheet,
`and through the openings in the supporting sheet,
`one face of said cloth.
`one face of said cloth.
`and thence out of the screening machine.
`and thence out of the screening machine.
`6. In a gyratory riddle, in combination, a
`6. In a gyratory riddle, in combination, a
`I have found that the herein disclosed means
`I have found that the herein disclosed means
`screen, a fine mesh wire cloth and a soft rubber 90
`screen, a fine mesh wire cloth and a soft rubber 90
`for supporting ultra wire cloth greatly lengthens
`for supporting ultra wire cloth greatly lengthens
`coated metallic foraminate supporting means
`coated metallic foraminate supporting means
`the life of the cloth and makes economically
`the life of the cloth and makes economically
`therefor attached to said screen frame.
`therefor attached to said screen frame.
`feasible its use in industrial screening, particu-
`feasible its use in industrial screening, particu-
`7. A supporting device for, ire screening cloths
`7. A supporting device for, ire screening cloths
`larly in the screening of liquid suspensions of fine
`larly in the screening of liquid suspensions of fine
`comprising a relatively rigid reinforcing struc-
`comprising a relatively rigid reinforcing struc-
`grained solids.
`grained solids.
`ture having spaces for the passage of material 95
`ture having spaces for the passage of material 95
`It will be apparent that such supporting means
`It will be apparent that such supporting means
`therethrough, and a coating on at least one side
`therethrough, and a coating on at least one side
`also will serve to lengthen the life of other wire
`also will serve to lengthen the life of other wire
`of said reinforcing structure, said coating being
`of said reinforcing structure, said coating being
`cloth of coarser mesh, which is now commonly
`cloth of coarser mesh, which is now commonly
`formed of a material substantially softer than the
`formed of a material substantially softer than the
`employed with still coarser wire cloth backing,
`employed with still coarser wire cloth backing,
`screening cloth and having areas of substantial
`screening cloth and having areas of substantial
`and I consider this use also to fall within the
`and I consider this use also to fall within the
`size adapted to contact therewith. (cid:9)
`size adapted to contact therewith. (cid:9)
`scope of the present invention. There is this dif-
`scope of the present invention. There is this dif-
`8. In a screening device, in combination, a wire
`8. In a screening device, in combination, a wire
`ference, however, between the use of the inven-
`ference, however, between the use of the inven-
`screening cloth, and unitary sheet-like forami-
`screening cloth, and unitary sheet-like forami-
`tion with such coarser wire cloth, and its use
`tion with such coarser wire cloth, and its use
`nate supporting means for said cloth lying face to
`nate supporting means for said cloth lying face to
`with very fine mesh and ultra wire cloth: in the
`with very fine mesh and ultra wire cloth: in the
`face thereagainst, said supporting means having
`face thereagainst, said supporting means having
`first instance the invention merely effects an
`first instance the invention merely effects an
`a substantially continuous periphery and being :05
`a substantially continuous periphery and being :.05
`economy, whereas in the second instance the in-
`economy, whereas in the second instance the in-
`substantially no smaller in size than the effective
`substantially no smaller in size than the effective
`vention is a necessary factor in the employment
`vention is a necessary factor in the employment
`screening area of the screening cloth, the material
`screening area of the screening cloth, the material
`of very fine mesh and/or ultra wire cloth, as
`of very fine mesh and/or ultra wire cloth, as
`of the supporting face of said supporting means
`of the supporting face of said supporting means
`hitherto there has been no method available by
`hitherto there has been no method available by
`being substantially softer than the material of
`being substantially softer than the material of
`which it was economically feasible to employ such
`which it was economically feasible to employ such
`said cloth. (cid:9)
`said cloth. (cid:9)
`cloth for industrial screening.
`cloth for industrial screening.
`9. In a screening device, in combination, a wire
`9. In a screening device, in com