US1216711A - Mechanism for removing treated materials from driers and the like. - Google Patents

Description

w. R. MACKLIND MECHANISM FOR REMOVING TREATED MATERIALS FROM DRIERS AND THE LIKE.

APPLICATION FILED 0011.2. 19l3. 1,216,71 1. Patented Feb. 20; 1917.

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Patented Feb. 20, 1917.

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W. R MACKLIND. MECHANISM FOR REMOVING TREATED MATERIALS FROM DRIERS AND THE LIKE.

t APPLICATION FILED OCT. 2. 1913. 1,216,711.

Patentd Feb. 20, 1917.

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APPLICATION FILED OCT- 2. I9I3.

Patented Feb. 20,1917.

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i, D STATES PATENT OFFICE.

WILLIAM R. MACKLIND, CLEVELAND, OHIO.

MECHANISM FOR REMOVING TREATED MATERIALS FROM DRIEBS AND THE LIKE.

Specification of Letters Patent.

Patented Feb. 20, 1917.

Original application filed. August 10, 1912, Serial N 0. 714,323. Divided and this application filed October 2,

1913. Serial No. 793,050. r

T 0 all whom it may concern: h

Be it known that LAVILLIAM R. MACK- LIXD. a citizen of the United States. and a resident of Clevelanchcounty of Cuyahoga. and State of Ohio. have invented a new and useful Improvement in Mechanism for Bemoving Treated Materials from Driers and the like. of which the following is a specification. the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle. so as to distinguish it from other inventions.

The improved mechanism which forms the subject matter of interest herein is designed primarily for removing and handling pulps, that is wet sludgy materials. both in mineral and vegetable products after they have been dried. A .pulp of the kind in mind is produced in the manufacture of white lead and lead oxid, zinc oxid and other pigments, and in drying such a pulp the material is left in the form of a thin film on the drying surface from which it requires to be removed before another layer can be deposited and the-drying operation continued. More specifically the present improved mechanism is designed for use in the fashion just described in connection with a continuous drying machine of the kind illustrated in my co-pending application filed August 10, 1912. Serial X0. 71%.323, out of which the present case has'been required to be divided, such drying machine being characterized, among other things. by the use of an aniiular drying table. It will be understood, however. that my improved mechanism for removing treated materials. while thus designed for use in conjunction with a drying machine of this type. may also be advantageously employed in, connection with other kinds of drying machines. and for that matter may be used in removing mate-- rials from machines which treat such materials in other ways than by drying the same.

'here the materials being dried. for ex ample. are lead products such as certain of the pigments named above. it is desirable to provide against the escape of the material in the form of a powder into the surround ing atmosphere. The present improved mechanism. accordingly. has as its object not only the quick and thorough removal of the material from the surface, 6. g. the drying table on which it has been treated, and

hollow so as to permit of steam being plied thereto in order to heat the table.

the conveying of such removed material to the desired pointof discharge; but such 111iprovements also have as an object the 'preyention of the escape of poisonous products into the atmosphere, thus rendering it safe for the operators to work about the machine. To the accomplishment of the fore-- going -and related ends. said invention, then, consists of the means hereinafter fully described and particularly pointed outin the claims.

The annexed drawings and the following description set forth in detail certain mechanism or apparatus for removing the dried material; Fig. 3is a transverse sectional view of said removing apparatus taken on the line 33, Fig. 2; Fig. iis a transverse sectional view of such conveying mecha-- nism; Fig. 5 is a plan view, with 'parts shown in section. of a suction apparatus associated with such material removing apparatus and designed to prevent the escape of dust into the atmosphere incidentally to the removal of the dried material from the drying table; and Fig. 6 is a side elevationalview and partial section of such suction apparatus.

The general features of construction characterizing the drying machine shown in the foregoing drawings need be only briefly noted in the present connection. Such ma: chine comprises as its principal element an drying table A shown in transversesection in Fig. 1. Tliis'tableis supported by means of a series of suitable supporting stands 1. upon the foundation 2, and is built up of a plurality of contiguous sections which are sup- Pipes 6 and-7 are provided for respectively supplying steamto, and removing the water I annularsubstantially horizontally disposed of condensation from, such hollow table sections, these pipes being radially disposed and connected at their inner ends to circular headers 8 and 9 respectively.

In cooperative relation to said table are then provided a feeding apparatus for depositing onto the table a layer or film of the material to be dried; an apparatus for removing the vapor and moisture arising from the drying of suchdeposited material; and an apparatus for removing from the table the dried material and discharging the same from the machine. Of the foregoing, the only apparatus of present interest, as previously indicated, is the last named or material-removing mechanism, which will now be described.

Such removing mechanism is in the main carried in proper cooperative relation to the annular table A by a rotatable frame (Fig.

' 1), although it will be understood that if found feasible, by reason of variation in size, or for other reasons, to rotate the table instead of the supporting frame, this may be very well done so far as the principles of operation involved are concerned. The cen-.

ter of said rotatable frame is 'a cast iron spider 1O rotatably mounted on a central column 11 having'a flanged top and a centering sleeve 12. A plurality of arms 16, fabricated of structural steel, extend radially from said spider 10 to beyond the outer edge or periphery of the annular drying table, such outer arm-ends being spaced from the surface of the table a sufficient distance to provide the necessary clearness for the parts ter at p'oints substantially the same radial distance from the central a xis of the machine as the inner edge of the annular table. It is not intended to support the entire weight of the rotatable frame from the central col- 'umn 11, but, at least in a large machine such as; the one illustrated, a circular track 19 is provided on the outer stands '1 of the annular table. Upon this track, rollers 20,1nounted in brackets 21 extending downwardly from the outer ends of the respective radial arms 16, are adapted to run.

The means for rotating the frame about its central axis form no part of the present invention and so are not illustrated, and the same may be said of the apparatus for feeding the material onto the drying table A and for removing the same, or vapor that arises from such material, as the drying operation proceeds. It may be explained, however, that such feeding apparatus, and for that matter the vapor-removing apparatus likewise, is carried by the same rotatable frame which supports the material-removing apparatus about to be described. Furthermore, the feeding apparatus is located just behind the removing apparatus having regard to the direction of rotation of the frame, so that as soon as the surface of the table has been cleared of the previously deposited and dried material, a freshcoat of the wet untreated material may be deposited thereon again and the drying operation thus continued indefinitely in continuous fashion, as the frame with the aforesaid apparatuses rotates.

The apparatus for removing the dried material is shown in detail in Figs. 2 and 3 inclusive, and consists essentially of a brush adapted to contact with the surface of the drying table A and followed by one or more scrapers 71 which gather up the mavterial loosened by the brush, two such scrapers being employed in the machine illustrated. Both the brush and the scrapers are inclosed in a tight casing 72 that surrounds the same on. all sides having close fitting contact with the drying table at its outer and inner edges, and depending into substantial contact with the surface of the same 011 either side of the removing apparatus. Such contact, in the case of the inner table edge, is secured with the under surface of such edge, which projects beyond the body of the table with this object in view, the casing 72, or rather the hopper 91 extending downwardly therefrom, being provided with an inwardly bent lip 73 faced with packing material. Close contact, in the case of the front and back walls of the casing is preserved by means of strips 74: of flexible material that depend from said walls lower edges and drag along the surface of the table (see Fig. 3). Such front and back walls of the casing may be removed in order to obtain access to the brush and the scrapers, respectively.

As shown in Figs. 1 and =1, the inner and outer ends of the brush spindle are carried in bearings 75 which may be made vertically adjustable, whereby the degree of pressure exerted by the brush on the drying table may be varied, as desired. Each scraper consists of a strip of thin metal attached to the lower edge of an angular trough member 76 that is hung from the spindle 7 7 of a conveyer screw 78 disposed to fit snugly in said trough member. Rods 7 9, connected with brackets 80 that project rearwardly from the conveyer troughs, ex-

escape.

ends with a series of sprockets 83. 81 and 85 which are connected with a corresponding series of sprockets on a jack-shaft 89 ing merely provided to insure the-thorough and complete removal of the material} The conveyers T8. in operative conjunction with the scrapers. carry the material to the inner ends of the scraper troughs 76 so as to discharge the material into a hopper 91 that is suspended from and integral with the adjacent end of the casing 72 inclosing the removing apparatus. This hopper has a close fitting contact with the under edge ofthe table. by virtue of the lip 73 of the casing, previously described, so that no dust can Leading from the hopperis a conveyer trough 92. radially disposed with respect to the axis of the machine and having a screw conveyer 93 whereby the material received in said hopper 91 is carried to an inner conical hopper 94 formed integrally in the central column 11 whereon the rotatable frame of the machine is supported. This hopper 9-t opens at its lower end into another conveyer 95 by means of which the material may be carried to any suitable discharge point away from the machine. The inner end of the conveyer 93. that extends from the removing apparatus to this central hop- .per 94. desirably has a close fitting connection with the opening in the latter. which mustnecessarily extend entirely around said hopper. Connection of the conveyer with the hopper is accordingly in the form of an annular closure 96 having a tight fit ting contact with the lateral flanges 9? disposed above and below such opening. as shown in detail in Fig. 1. A'tight. dustproof fit between this. closu re and the flanges 97 is insured by the use of packing rings 98 thatare held in .contact with-the flanges by means of resilient members 99.

The driving of the screw conveyer 93 is accomplished by means of the same motor that drives the removing apparatus proper.

To this end another sprocket 100 is provided on jack-shaft 89 (Fig. 4:). said sprocket being connected with a sprocket 101 located below the trough 92 that .is in turn ,con-

nected with the conveyerby intermediate.

gearing 102.

Despite the fact that the casing 7:2 that incloses the removing apparatus proper fits the drying table A as closely as possible.

there will. nevertheless. be some dust or finely powdered material escape into the outer atmosphere unless addltional precautions be taken. Such additional precautions comprise a suction fan 103 (Figs. 1. 5 and 6) connected to be driven from the same jack-shaft 89 as the removing apparatus and conveyer 93 just described. by means of a belt 10- The intake to such dust fan leads from the casing 7:2 that incloses the aforesaid apparatus. while the discharge takes place into a dust collector head. 105 from which depend a plurality of bags 106. of familiar construction. which allow the air to pass readily through but retain any dust that maybe carried thereby. The lower ends of the bags are normally tied shut, but when a sufiicient amount of dust accumulates therein to render such procedure desirable. they may be raised. and by tying the bags at an intermediate point and opening such ends. such dust may be dropped into the conveyer; a removable cover 107 being provided in the conveyer trough at acon venient point.

The preferred arrangement of intake is that shown in detail in Figs. 5 and 6 and consists of two branched trunks or pipes 108. extending in a horizontal direction over the casing 72 and increasing in diameter toward their fan-ends at each juncture of the branches 109 therewith.

By the foregoing described means the dust which is collected by the fan is joined to the bulk of the material that is directly carried 01f by the removing apparatus. It will be understood that only a moderate suction requires to be produced by the fan. the only object being to produce a slight draftat the joints where the casing 72. that incloses the removing apparatus. fits the edges and surface of the drying table. This will serve to prevent any dust escaping into the outer atmosphere without imposing on the vfan the duty of removing any. considerable "removing apparatus immediately precedes the feeding apparatus. such removing apparatus breaking up and carrying to the inner edge of the annular table the layer of material that had been deposited on the table 011 the previous round- This dried material. as it drops over the inner edge of the table. is caught in the hopper. or. chute 91. and is thence carried by conveyer 93 to the central hopper 9i. and so away out of the machine. o

By means of the suction fan 103, the air pressure within the casing 72. which incloses the aforesaid removing apparatus. is lowered sufficiently to prevent the escape of any dust that-may be caused by the breaking up of the material under the action of the re-' the escape of dust is avoided and the material conveyed away from the machine without exposure of the operator in any way, is

highly important where poisonous materials are being handled, but in dealing with any class of materials the elimination of dust contributes not only to the comfort of the operators of the machine, but much facilitates the general operation. At the same time the mechanism provided for removingthe material from the table surface is highly efficient and capable of very rapid operation, all contributing to render the apparatus as a whole a very desirable one for use in the connection in which it has been illustrated, as well as in various other fields of service.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made' as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention 1. In mechanism of the class described, the combination of an annular table; a hopper substantially centrally disposed with respect thereto; means movable in a circular path over said table and adapted to remove therefrom a layer of dried material; and conveying means connected with said first named means so as to travel therewith and extending radially inward from said table so as to convey such removed material to said hopper as fast as removed from said table.

2. In mechanism of the class described, the combination of an annular table; a. hopper substantially centrally disposed with respect thereto; means movable in a circular path over said table, said means being adapted to loosen a layer of dried material on said table and to remove the same to the inner edge of the latter; and conveying means connected with said first named means so as to travel therewith and extending radially inward from said table so as to convey such material from the inner edge thereof to said hoppervas fast as removed from said table.

3. In mechanism of the class described,

the combination of an annular table; a hopper substantially centrally disposed with respect thereto; means supported so as to be movable in a circular path over said table and adapted to remove therefrom a layer of material, said means comprising a radially disposed brush and a scraper following the same, both adapted to contact with said table; and conveying means connected with said scraper so as to travel therewith and extending radially inward from said table to said hopper so as to convey such material from said table to said hopper as fast as removed.

4. In mechanism of the class described, the combination of an annular table; a hop per substantially centrally disposed with respect thereto; means supported so as to be movable in a circular path over said table and adapted to remove therefrom a layer of material, said means comprisinga radially disposed brush and a scraper following the same, both adapted to contact with said table; a conveyer extending lengthwise of said scraper and adapted to convey material received on the latter to the inner edge of said table; and another conveyer connected to travel with said scraper and extending from the inner edge of said table to said hopper, said last named conveyer being adapted to receive the material from said first conveyer and transfer the same to said hopper as fast as removed.

5. In mechanism of the class described. the combination of an annular table; means supported so as to be movable in a circular path over said table and adapted to remove therefrom a layer of material, said means comprising a plurality of radially disposed scrapers following one after the other; a conveyer extending lengthwise of each of said scrapers and adapted to convey material received on the latter to the inner edge of said table; and another radially disposed conveyer connected to travel with said scrapers and adapted to receive such material therefrom, said last named conveyer exsupported soas to be movable in a circular f path over said table and adapted to remove therefrom a layer of material, said means comprising a radially disposed brush and a plurality of scrapers following the same,

one after the other; a conveyer extending 13a lengthwise of each of said scrapers and adapted to convey material received on the latter to the inner edge of said table; and another radially disposed conveyer connected to travel with said scrapers and adapted to receive such material therefrom, said lastnamed conveyer extending toward the central axis of said table.

8. In mechanism of the class described, the combination of an annular table; a hopper substantially centrally disposed with respectthereto; means adapted to remove a layer of material from said table, said means comprising a radially disposed brush and a scraper following the same, bothl adaptedto contact with said table; and other means connected with said scraper so as to travel therewith and adapted to convey such removed material to said hopper.

9. In mechanism of the class described, the combination of an annular table means movable in a circular path over said table and adapted to remove therefrom a layer of the dried material; other means adapted to convey such removed material toward the axis of said table; a casing inclosin said removing means and having a close-htting contact with said surface; and other means adapted to lower the air-pressure in said 10. In mechanism of the class described, the combination of an annular table; means movable in a circular path over said table and adapted to remove, therefrom a layerof the dried material other means adapted to convey such removed material toward the axis of said table a casing inclosing said removing means and having a close-fitting contact with said surface; a suction fan connected with said casing; and means adapted to collect any dust in the air withdrawn from said casing by said fan, said dust-collecting means being adapted to discharge such (lust into said conveying means.

11. In mechanism of the class described, the combination of an annular table; a column centrally disposed with respect to said table; a hopper in said column having an opening encircling the same; a frame rotatably supported upon said column and extending over said table; means carried by said frame in operative relation to said table and adapted to remove material therefrom; and conveying means also carried by said frame, said conveying means leading from said removing means and discharging into said hopper openin 12. In mechanism of the class described, the combination of an annular table; a column centrally disposed withrespect to said table; a hopper in said column having an opening encircling the same; a frame rotatably supported upon said column and extending over said table; means carried by said frame in operative relation to said table and adapted to remove material therefrom; a casing inclosing said removing means and having a tight-fitting contact with said table: conveying means alsocarried by said frame. said conveying means leading from said removing means and discharging into said hopper opening; and a closure for said opening rotatable with said frame.

13. In mechanism of the class described, the combination of an annular table; a column centrally disposed with respect to said table; a hopper in said column having an opening encircling the same; a frame rotatably supported upon said column and extending over said table; means carried by said frame in operative relation to said table and adapted to remove material therefrom: a casing inclosing said removing means and having a tight-fitting contact. with said table; conveying means also carried by said frame, said conveying means leading from saidv removing means and discharging into said hopper opening; a closure for said opening rotatable with said frame; and a suction fan mounted on said frame and connected with said casing.

11. In mechanism of the class described, the combination of an amiular table; a column centrally disposed with respect to said table; a hopper in said column having an opening encircling the same; a framerotatably supported upon said column and extending over said table; means carried by said frame in operative relation to'said table and adapted to remove material therefrom; a casing inclosing said removing means and having a tight-fitting contact with said table; conveying means also carried by said frame, said conveying means leading from said removing means and discharging into said hopper opening; a closure for said opening rotatable with said frame: a suction fan mounted on said frame and connected with said casing; and means adapt-ed to collect any dust in the air withdrawn from said casing by said fan, said dust-collecting means including a bag depending over and adapted to be emptied into said conveying means.

15. In mechanism of the class described, the combination with a table; of relatively movable means for removing the dried material therefrom, said means comprising a rotary brush and a scraper following the same, both adapted to contact with said table; a casing inclosing said brush and scraper; and a suction fan connected with said casing and adapted to lower the air pressure therein.

16. In mechanism of the class described, the combination with a table; of relatively movable means for removing the material therefrom. said means including an angular trough tiltable about a longitudinally extending axis, a scraper attached to one edge of said trough and adapted to contact with said table, resilient means connected with saith-trough to hold said scraper in such contact, and a screw-conveyer extending lengthwise ofsaid trough.

17. In mechanism of the class described, the combination with a table; of relatively movable means for removing the material therefrom, said means including an angular trough tiltable about a longitudinally extending axis, a scraper attached to one edge of said trough and adapted to contact with said table, resilient means connected with said trough to hold said scraper in such contact, means adapted to adjust the pressure exerted by said resilient means, and a conveyer extending lengthwise of said trough.

18. The combination of an annular table, a hopper located substantially at the center of said table, a rotatably mounted closure for said hopper, and conveying means extending from the inner edge of said table to said hopper closure and movable circularly along such table edge.

19. The combination of an annular table; a hopper located substantially at the center of said table; a rotatably mounted closure for said hopper; a conveyer extending from the inner edge of saidtable to said hopper closure and movable circularly along such edge; and means movable in a circular path over said table in unison with said conveyer and adapted to remove material from said table and discharge the same into said conveyer.

20. The combination of an annular table;

a hopper located substantially at the center of said table; a rotatably mounted closure for said hopper, a conveyer extending from the inner edge of said table to said hopper closure and movable circularly along such edge; means movable in a circular path over said table in unison with said conveyer and adapted to remove material from said table and discharge the same into said conveyer; and a casing inclosing said removing means.

21. The combination of an annular table; ahopper located substantially at the center of said table; a rotatably mounted closure for said hopper; a conveyer extending from the inner edge of said table to said hopper closure and movable circularly along such edge; means movable in a circular path over said table in unison with said conveyer and adapted to remove material from said table and discharge the same into said conveyer; a casing inclosing said removing means and having a close-fitting contact with the surface of said table; and other means adapted to lower the air-pressure in said casing.

22. The combination of an annular table; a hopper located substantially at the center of said table a rotatably mounted closure for said hopper; a conveyer extending from the inner edge of said table to said hopper closure and movable circularly along such edge; means movable in a circular path over said table in unison with said conveyer and adapted to remove material from said table and discharge the same into said conveyer; a casing inclosing said removing means and having a close-fitting contact with the surface of said table; and a suction fan connected with said casing.

Signed by me, this 29th day of September, 1913.

WVILLIAM R. MACKLIND.

Attested by:

OLIvER Box, JONATHAN E. INGERSOLL.

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