US2074131A - Process and apparatus for surfacing roofing - Google Patents

Description

' inocnss AND APPARATUS FOR sunmcmd ROOFING i iledb t. 26. 1933 2 Sheets-She'bt'l 3:. I I E I k. I. I k I g ar INVENTORS Y v .8. 6, Pen/er 19. 1/0/45 war;

1 ATTORNEY March 16,1937. B. s. PENLEY ET AL PROCESS-AND APPARATUS FOR SURFAGING ROOFING Filed Oct. 26, 1933 7 2 Shets-Sheet 2 INVENTORS B. 5. Pen le u H. /9. bdoawar 7/;

ATTORNEY rim-.1 is, 1937 UNITED STATES PATENT. 'orrlca rnocess AND mans-ms roa snnrscmo Benjamin Holdsworth.

' Barrett Company, New York, N. Y. a'eorparationofNew-Ieney Application mm :6, 193:. s en! No. 5,312

'Ihis invention relates to the surfacing of ma.

ing, and more particularly, to the iormation of colored tion roofing, such' as i'elt base roofing saturated with bituminous waterproofing material, coated with bituminous waterproofing material, and having colored granular material Darthembedded in the coating on the exposed face oi the roofing. The term "roofing mate vlsusedinal'iroadsenseandisintendedtoinclude material employed for roofing, siding, and other analogous protective or decorative purposes.

The application oi granular material 0! one color or blend oicolors to coated roofing material during the continuous passage 01' the roofing materialthrougharoofingmachineiswell known.

Ithasbcenproposedtoieedaroofingshe'etor web beneath a series oi hoppers, containing ditierently colored granules and operated intermittently in such way that all the hoppers, concurrentlydroppedgranularmaterialonthemoving apredeterminedsheetwhilethesheetp as distance, thus forming transverse stripes on the sheet. 'lhenthefiowoigritiromallthehoppers wasintermptedwhilethesheetwasmovedadistanceequaltothelengthoitheroofingmaterial onwhiehgrithadbeenshoweredfromthehoppers. Anadditionalhopperwasprovidedtopour granular material over the whole sheet continuouslysothatanyunsuriacedportionsoithe sheetwerecovered with granularmaterlal.

Buchpmcedurehasthedisadvantagesthate cesive-amounts oi grit require handling, and oolorbandsoiddrcdcolorcannotbeformedon theroofingsincethegritappllediromthehopper continnousiyieedinggranularmaterlalontothe sheetcommingieswiththegritdeliveredimmthe otherhopperathusaiiectingthecolorappeab anceoithegrltontheroofing. Furthermore, theintq-mittentieedingoigranularmaterial 'io ultaneouslytromaplm-slitycrm m;

ingthemovementoitheroofingisdiificulttosynchronize withv the movement 01' the roofing; hence, contiguous portions of certain of the dif- 'ierentlycoloredbandsmayblendinto eachother throughouttoanundeairahleextent, ormayi'ail tomeetontheielt.'withconsequentdetrimentto theappeai'anceof'tbefinishedelements. K

It is an object oi this invention to provide an eiiicient and economical suriacing procedure ior march ng transverse stripes of diiierentiy colored granular material to a moving roofing web with little orno overlappin or blendingoi the granules defining contiguous stripes. In accordance with this invention, streams of diiferently colored granularmaterialareiedsuccessivelydirectly onto amovingroofing web, interval for the e oi each grit particle of each stream irom its source to the web being substantially the same. Hence, upon the interruption oi the flowof one stream with the'simultaneous initiation oi the fiow oi the second stream, the particles of the second stream are deposited on the roofing web contiguous to the particles oi the first stream. During the continued surfacing of the roofing web. difierently colored streams are vely deposited onto the web, resulting in the formation oi well defined contiguous transverse stripes or hands oi diiierent colors.

Another object of this invention is to provide surfacing apparatus oi comparatively simple design and construction and which is durable and efilcient in operation .ior iorming well-defined transversestripesofgranularmaterialonarooi- Otherobiectsand wlllappearfrom the following detailed description, taken in connection with the accompanying drawings; in which- HgJisandeeIevatIoncI-M IB K this invention;-

Fig. 2 is a iragmentary side elevation or a modifiediormoisuriadngapparatusthis invention;

Fig.3-isairagmentarysideelevatiompartlv insection, onanenlargedscale.ascomparedwlth Fig.1,sndshowstheioroperaflng agateorvalvecontrollingthedischargeoigranularmaterialiromahoppen riaiisasideelevafl maticincharacter,showin'g ingcomposition-roofing;

Pimfihafragmentary surfaced in accordance with this invention:-

I'ig.6isasideelevat-iaompartiyinsection,ill'ustrating a modifiediorm oi surfacing apparatus embodylngthlsinwention; I

l"is.'ilsai'rasmenh rverticalsectionthrough oneoithehcppersoil'ig.6;and Fig.8isadetailedshowingoiairont-eleva- .tionoioneoithecamsandanswitch somewhat irn .u for m? oi the electrically operated control ior operating the gatesor valves whichcontroithedischarge oi granularmaterlaliromthehoppera' Reierring tothe drawings. with particular reierence to Fig. 4, a sheet oifihrousmaterlal'll,

which may be,andpreierably is.oithe'usual roofing ielt'madeoi rag .paperstock. or other fibrous material, with or without suitable fillers,aawellknowninthisart,isfedbyieed' rollsiin'omtheusualpapermahingmschine liollaltendllieedthesetuntedsheetton lflleeondlooping device ll. 'lhepnsenge'otthe ntmtedflbroussheetorheaethrouzhtheloop- Htuminous material may be upplicdtothetopoithelheethymeensoiapipe IIhevingespoutoi'nwidthn equal tothntotthesheet. Aethesheetpnseobet'een thecootingmlls 23,,theunderxldeis0ompletelycontedhyroll 24. Theeoatingmnterinl deliveredhupipel'liaspreeduniiomlyoverthe topeidebythe contingroll llpexcea eoeting mnterlnlpessingovertheetkeeoithedieetnnd llnlningintothetnnkli. v

Immediately after leaving the coating appliance 'nmqwhnetheeomn mmusunmmn preventldhereneeoidusttheretoandtohdlitnte ptheflowofuitthereeiong. v

'l'hedlxtributorroilsamnvhecuntinumh mtntedinthedireetioneindimtedhythenrrows thereonhymeensotmmitnhledrive (not nborn). Preferablygthedriveforrolisflh Ieuedtothatfm-therollsordmmllhereinntterdeoerihgwhiehrolispullthedieetthmmh m vplntuuheneetheieedofennnhrmteiilltothesheetisploportionnitothemvethedepoeitpointl'l (113.1) inacoimta-cloekllcdlrectionandthoeetothemtinn-doekwiee -du'eetion,nn initlnlvehdtyisimpnrtedtothe 7 lrenulnrmaterinlinthedireetlmoti'mthereot themomentthevaiveplatsueopened. when the note con b inl the dhehnrge oi granular materiel kcloeemoslhown indottedllnes m IkJJhente'inten-uputhedhdnmcdmmnlormeterinlthecontinnedmtntlondthedh tributing roll functioning to egitote the material at the base of the hopper mnuleeinalooseconditionaothatupon eequentopeningotthegntetotheiullline occur: immediately. I

Granularmaterial of difl'erent colors is prefernhlysuppliedto the hoppers. Theflowof granuinrmaterieliromeechhopperiscontrolledbya phtevalveorgate llpivotedatflandsecured to an arm or lever II, as shown on Fig. 3. Since the gates and the operating mechanism therefor 'forellhoppersareoilikeconstmetiomonlyone Iiilbedescrihedindetail. Leverorermllhas an end secured to pivotally mounted plate valve ll and the other end pivoted as at u to arelntively longnnnorleverll. Leverlipnss'esthroughn vzuim'iesllotinasuppoi-tllamihasmolmteriin its'endllecamroll ll. Thmcamrollisarnncedtotravelinthecemtraekllofthecem i2 keyed to shaft 53 rotatably mounted undernnaedtobe drivenbya suitable source of shnitilhnsonecamflioreochhopperendthe -cam.snresonrrangedthntthegatesll areopernted inwtimed sequence. flowoi' grit from one hopperbeinginterruptedwhileflowofgrittroma second hopper is simultaneously initiated by the lctuntion of valve plate ll. Whenthevnlve plate ll isin the posltionindieatedindottedlines on m3,i.e.,inthepositionawayiromroilll,the grit showered by the distributing roll I! is inter- 'ceptedbytheplatellnndflowotgritfromthe hopperisprevented. Actuation of plate ll, into thefulllinepoeitionshowninPigJ emovesthe plate trom the path of flow oi'erit showered by therotatingrollliandpermitsthexrittofall onto the guide plate associated with the hopper and thence onto the coated sheet.

'I'hehoppersofFig, l may eonvenientlyheremdedes dividedinto twoerwpe.AandB,g1-oup 25 plates II, I! are associated with hoppers 8|, 82,

In Fig. 2, a modiiied arrangementof hoppers is shown. The hoppers of this figure, instead of having the discharge outlets at different levels, as in Fig. 1, have all the discharge outlets l8 disposed in the same horizontal plane. In the embodiment of the invention shown in Fig. 2. four hoppers, numbered 8|, 8!, 88, and 84, are employed,arrangedinpairsc andD,pairCbeing constituted of hoppers 8| and 82 and pair D of m hoppers 88 and 84. The pairs or hoppers C and D are disposed equi-distances on opposite sides 7 of the vertical plane passing through the deposit point 88 where the grit from the hoppers is delivered onto the coated sheet. A guide plate 81 is arranged to receive grit from hoppers ii, '62 and a second guide plate 88 is disposed to receive grit from the other two hoppers 63, 84. As in the case of Fig. 1, these guide plates may be of steel and may be equipped with suitable vibrazotors.

Hoppers ii and 62 are disposed equi-dlstanoes on opposite sides of the point represented by reference numeral 88 where grit is deposited from thesehoppers onto the guide plate 81. Guide respectively, to guide the discharge of grit from these hoppers ontothe guide plate 81. Hoppers 88 and 84 are disposed horizontally equi-distances from deposit point I8. Guide plates 14, 15 are with hoppers 88, 84, respectively, to guide the flow of grit irom these two hoppers onto the guide plate 88. With the arrangement of hop-. pers shown in Fig. 2, the path of movement of the granules from each of the hoppers to the de-' posit point 88 issubstantially the same inextent. Accordingly, a like time interval is required for the flow of the grit particles constituting each of the streams from their source to the deposit point, the speed of rotation of the distributing rolls in all the hoppers being substantially the same. As in the case of the hoppers of-Flg. 1, those 'of Fig. 2 are equipped with valve plates 4| and operating mechanism therefor, similar to valve plates described hereinabove, in connection with the apparatus of Fig. l, In operation, as the coated sheet passes beneath the surfacing device of 1 or Fig. .2, grit of one color is fed from one hopper, gravitating down the inclined guide plate associated therewith and being deposited directly onto the coated sheet during. the movement of the sheet through one unit, in the instant case the width of stripes l to! (Fig. 5). Thereafter, the valve plate of the hopper from which the grit was fed to the coated sheet is closed and the valve plate of another hopper simultaneously opened so that grit is delivered from this other hopper to the coated sheet during thetravel of the sheet through a second unit. This operation of interrupting the feed of grit from one hopper and initiating the feed of grit from another hopper is repeated so that streams of grit are fed successively from each of the hoppers, eachstream flowing during the movement or the sheet through one unit and only one stream flowing atany one time.- stripes: l' to I of different colkeyedtooneshaftilandthevalveplatesare o tedintimedsequcncesothatstripesohmiiorm widthareformed..Itdesired,the;camsor 75 the electrical controlhereinatterdescribed may be a and arranged so that all valve plates do not remain open for the same time interval but one or more of the plates are open fora longer time interval than the others so that the stripes formed are not all of the same width but are of different widths.

After being surfaced as hereinabove described, the surfaced sheet passes about reversing roll 8| which functions to partially embed the mineral I granules in the plastic coating. Any excess granules fall from the surfaced sheet into a hopper 82 and may be returned from this hopper to one of g the hoppers 8| to 85 or may be otherwise disposed of.

In the continued passage of the surfaced sheet, it travels next under a hopper 88. Powdered talc, mica or other anti-stick composition capable of rendering the back of the sheet non-cementitious'is disposed in hopper 83' and isdischarged therefrom onto the coating on the back of the sheet in the form of a, tale surfacing layer covering substantially the entire width of the sheet. The talc-covered sheet then passes over reversing roll 84, which partially embeds the seal back coating and imparts a smooth surface to the back of the sheet.. Excess talc falls from the faced sheet into cutting cylinders 88 which cut the surfaced; sheet into individual or strip shingles; i. e., shingles having tabs along one longitudinal edge thereof of rectangular or other desired shape. I

Figs. 6 and '7 disclose a modified form of apparatus for applying granular material to the sheet, the modification involving the same arrangement of hoppers as depicted in Fig. 2, which, however, are equipped with an electrical control for operating the gates or valves 4|. The electrical control of Figs. 6 and 7 is preferred since it functions to operate the gates more quickly'than'the cam mechanism of Figs. 1 and 2. Each hopper is equipped with a solenoid 8|, the core 82 of which is secured at 88 (Fig. 6) to an arm 84, in turn pivoted at 85 to the pivotally mounted gate or valve 4i. The core of the solenoid is constructed and arranged, as well known in the electrical art, so that uponthe interruption of the flow of current through the solenoid, the core drops,

pushing down on arm or lever 84 and causing the lever or arm 84 upwardly, causing the gate 4| to move toa position preventing discharge of granular material from the hopper. 7

One circuit for energizing and deenergizing the solenoids will now'. be described. Electrical conductors 88,81 (Fig. 5) communicate with a suitable sourceof E. M. F. Solenoids 8| are connected in parallel with the conductors 88, 81 by suitable conductors and each solenoid has connected in series therewith and individual thereto a switch 88. s when the switch individual to a solenoid is clam, as will be understood, the solenoid, is earning the core to move upwardly to closethevalve plate 4| operated thereby.'-The switches arearranged to be opened and closed by'cams 88, each individual to a switch and all keyed to a shaft Ill arranged to be rotated at a orothersuitahle source of power. -l'iach cam ll has raised portion Ill and a depressed portion .2. the raised portion being arranged to contact with the lower leaf spring I" of the switch 9' g to cause engagement of the contacts I thereby the switch. when the depressed portion Y portions of the cams on shaft Ill 10 arearranged in desired relation to open and close switches it in desired sequence.

As shown on Fig. 6, the switch at the extreme left is open so that the solenoid associated with holi per 64 is deenergized and the gate of this is hopper maintained in open position whereas the other switches are closed; hence, the solenoids in circuit therewith-are energized and the gates of the remaining hoppers maintained closed. Upon rotation of shaft Ill, the switch at the extreme 20 left (Fig. 6) is closed and another of the switches opened, causing deenergization of the solenoid in circuit with the open switch and the opening of the gate or valve of the hopper having the solenoid in circuit with theopen switch.

25 The surfacing apparatus of this invention may be employed to surface a roofing base constituted of the usual felt coated on both sides with asphalt or other bituminous material, surfaced on both sides with granular material and having overlay so spaced coating stripes of asphalt or other bituminous material on the granular surfacing. Such roofing base may be surfaced with transverse stripes of differently colored granular material applied to the overlay coating stripes, using the 85 surfacing procedure of this invention, and the resultant surfaced base may-then be cut longitudinally of the overlay coating stripes and also between theoverlay coating stripes into shingle elements having the exposed portion thicker than u. the upper unexposed portion and having the exposed portion surfaced with transverse stripes of differently colored granular material. It will be-noted that the surfacing apparatus of this invention is comparatively simple in design. The surfacing procedure herein described results in the formation of well defined contiguous transverse stripes of granular material and this withihe handling ofthe granular material reduced to a minimum. 7 50 Since certain changes in carrying out the above process'and certain'modifications of the apparatus may be made without departing from the scope of this invention. it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. For example, instead of applying granular material of difi'erent colors, granular. material of different degrees of coarseness or other physical characteristics-might be supplied to the hoppers and fed therefrom onto the coated sheet. If desired, each hopper might be provided with partitions dividing it into compartments, each .of which is supplied with differently colored, granular v material so that each transverse band i, 2, I, l,

single color. as shown on Fig. 4, will be constituted of contiguous portions of different colors and the formation of a plurality of such bands will result in the production of a "checkerboard" pattern. 1 "Weclaim: 1 i. he process of surfacing a longitudinally moving sheet of roofing material which comprises providing a plurality of sources of granular maand (Fig. 4) instead of being constituted of a' terial of difierent colors, flowing a stream of material extending transversely with respect to the direction of movement of said sheet from one of said sources directly onto said sheet to form a transverse band thereon constituted substantially entirely of granular material from said source, interrupting the fiow of said stream and substantially simultaneously initiating the flow of a second stream of difi'erently colored granular material extendlng transversely with respect to the direction of movement of said sheet from another of said sources. depositing said second stream directly on said sheet to form a second transverse band thereon constituted substantially entirely of granular material from said second named source, the time interval required for the flow of the second stream from its source to the sheet being substantially the same as that required for the first stream. V

2. The process of applying transverse bands 'of surfacing material of diiierent characteristics to a roofing sheet which comprises moving the roofing "sheet longitudinally beneath a plurality of sources of surfacing material of diiferent characteristics, flowing a stream of surfacing material extending transversely of the roofing sheet from one of said sources directly onto said sheet to form a transverse band thereon constituted'substantially entirely of surfacing material from said source, interrupting the fiow of the stream of surfacing material from said source, initiating the fiow of a second stream of surfacing material of different characteristics extending transversely of the roofing sheet from another of said sources and depositing said second stream directly on said roofing sheet to form a second transverse band thereon constituted substantially entirely of' surfacing material from said second source.

3.The process of, surfacing a longitudinally moving sheet of roofing material which comprises providing a plurality of sources of granular material of difi'erent characteristics, flowing a stream of granular material extending transversely of the direction of movement of said sheet from "one of said sources directly to a deposit point through which said roofing sheet stream is deposited directly from said source onto said sheet, interrupting the fiow of said stream of granular material and substantially simultaneously initiating the flow of a second stream of granular material of diflerent characteristics extending transversely of the direction of movement of said sheet from another of said sources, flowing said second stream directly from its source to said deposit point through which said roofing sheet moves, whereby said second stream is deposited directly from said source onto said sheet consecutively and contlguously to said first named stream, the flow of the stream from each of said plurality of sources being initiated substantially simultaneously with the interruption of a stream from another of the sources, again initiating flow of the stream from said first source upon interruption of'the last of said plurality of streams whereby all of said streams form a continuous stream and completely surface said sheet with transverse bands of surfacing material, each constituted substantially entirely of granular material from one of said sources irrespective of 1 changes in the rate of movement of the sheet with moves, whereby said ored grit and means for" intermittently and successively flowing diilerently colored grit streams from said sources directly onto said moving sheet, said means for successively flowing difmaterial beneath said sources, said stationary sources of granular material extending trans- .versely oi the direction of movement of said rooiing sheet therebeneath, means for flowing a stream of granular material from one of said sources,,means for depositing said streanawhile still flowing, directly onto said sheet, means for interrupting the flow of said stream and substan-- tially simultaneously initiating the flow of a secand stream of diilerently colored granular material frorn another of said sources and means for depositing the second stream 01' granular material, while still flowing, upon said sheet, said streams forming transverse bands of surfacing material on said sheet, each of. said bandsbeing constituted substantially entirely of granular material of one of said streams, said depositing means being constructed and arranged with respect to the path or movement of the rooflng sheet so that the time intervals required for the flow of the individual particlesoi said streams from their sources to the sheetare of substantially the same length.

6. Surfacing apparatus comprising in combination, means for continuously moving a roofflng web, a plurality of stationary sources of difl'erently colored granular material, said sources of granular material extending transversely of the direction of movement of the rooflng web, means for depositing a flowing stream of granular material from one 01' said sources directly onto said web during movement thereof to form a transverse band thereon constituted substantially entirely of granular material from said source, means for interrupting the flow oi'said stream of granular material and substantially simultaneously initiating the flow oi a second stream of diflerentlv colored material from another of said sources, means for depositing the second stream-oi granular material on said web during movement thereof to form a secondtransverse band thereon constituted substantially entirely of granular material from said second source, means for interrupting the flow of said second stream and substantially simultaneously initiating the flow of another stream of granular material from another of said sources to form another transverse band on said web, the streams of granular material from all of said sources substantially covering the entire rooflng web with transverse bands of diiierent colors, the means for depositing the streams of granular material being constructed and arranged with respect to the path 0! movement oi the web so that the time intervals required for the flow of the individual particles oi all of the said streams from their sources onto "the web are substantially the same.

'7. Surfacing apparatus comprising a plurality of stationary hoppers con i granular material ot diflerent characteristics and all arranged to separately ieedflowing streamsot granular material therefrom, means for conducting the I streams oi'granular'materlabwhilesaidstreams 'clomt to said 5 are still flowing, man 01' mam als directly to the same depodt point, said hoppers and conducting means being with respect to said deposit point so that the time of travel or the particles of granular material from all of said,

hoppers to said depodt point is substantially the same, means for successively discharging granular material from said hoppers to form said and means for moving a sheet of rooting material through said deposit point.

8. Surfacing apparatus comprising a plurality o! hoppers, each containing diil'erently colored granular material and allarranged to selm' fl feed flowing streams of granular mate'rlaltherefrom, means for conducting the streams oi granular material, while the streams are still flowing,

from, said hoppers directly tothe same depodt point, said hoppers and said conducting means being disposed with respect to said depoflt point so that the time of travel of grit particles to said deposit point is substantially the same, a valve plate for controlling the' discharge or granular material from each hopper, a distributing roll rotatably mounted in the outlet of each hopper,

and means for successively operating said valve plates to control the discharge of granular matefrom said deposit point and those hoppers having" the discharge outlets spaced vertically the greatest distance away irom said deposit point being disposed horizontally the closest to said deposit point, and means for discharging granular material from said hoppers.

10. Apparatus for surfacing roofing comprising, in combination, a plurality of stationary hoppers containing dlflerently colored r= ular material and arranged with the at diflferent levels, all oisaid hop ranged to feed granular material to the same depositpoint, those hoppers having the discharge outlets spaced the least vertical distance from the depomt point being disposed horizontally the furthest distance away from said deposit point and those hoppers having the discharge outlets spaced vertically the greatest distance away from said deposit point being disposed horizontally the deposit point, and means for successively depositing granular material from said hoppers onto a moving web passing through said deposit point.

11. Apparatus for surfacing rooflng comprising,

in combination, a plurality of hoppers each pro- I vided with a discharge outlet, said hoppers containing difl'erently colored granular material, the hoppers and discharge outlets being arranged at diflerent levels, guide plates arranged to reed streams of granular material irom said hoppers to the-same deposit point, those hoppers having the discharge outlets spaced the least vertical distance from the deposit point being horizontally the furthest distance away from said deposit point and those hoppers having the discharge outlets spaced vertically the greatest distance away from said deposit point being disposedhorizontally the clomt to said deposit point,

rolls rotatably mounted in the disdnrge outlets oi said hoppers forv said streams of granular material from said hoppersontosaid giudepiateasaidguideplatescom ductingsaidstreamawithoutstoppingtheflow thereot directly to said deposit point. valve plates ior controlling the discharge of granular material from said hoppers and means for succeaively operating the valve plates.

12. Apparatus for surfacing rooting material, four hoppers having the discharge outlets disposed in substantially the same horimntal plane and arranged to deliver granular material to the same deposit point, said hoppers being arranged in pairs, each pair having the outlets spaced equi-distances from said deposit point. a guide plate for each pair oi hoppers for guidingthegranularmaterialtosaiddeposit point, the individual hoppers of each pair being spaced emu-distances on opposite sides or the point oi delivery of granular material from said homers to said guide Plate. g

13. Apparatus fol-surfacing rooting material, comprising tour hoppers having'the discharge outlets disposed in substantially the same hori- .aontalplane and arranged to deliver grit to the same deposit point. said hoppers being arranged in pairs, each pair having the outlets spacedequi-distances from said d p sit point, a guide platetoreachpairoihopperstorguidingthe granular material to said deposit point-the discznrxrzci'rs' or coenrcrioui Patent No. 2,074,131. r

BENJAMIN S PEHLEY, ET AL.

It is hereby certified that error of the above numbered patent requiring correction as] follows: second column,- line 49, claim 10, after the word "feed" same line, after "material" that the said Letters Patent should be r that the same may conform to the record streams of;

charge outlets or the individual hoppers oteach pair. being spaced equi-distances oppoaitesides oi. the point of delivery oi granular material from said hoppersto said guide plate, avalve plate controlling the discharge of granular material from each hopper, a distributing roll rotatably" same deposit point, said hoppers being arranged inpairs, each pair having the outlets spaced equi-distances from said deposit point, a guide plate for each pair, of hoppers for guiding the granular material to said deposit point. the discharge outlets of the individual ho rs of each pair being spaced equi-distances on opposite sides oi the point of delivery of granular material from said hoppers to said guide plate, a valve plate controlling the discharge of granular material from each hopper, a distributing roll rotatably mounted in the discharge outlet oi' each hopper, and electrically operated control means for opening and closing. said valve plates in desired time sequence.

r BENJAMJN '8. RICHARD A. HOLDSWOR'I'H.

,; .March 16, 1937.

appears in the printed specification I Page 5, insert flowing insert the word directly; and

Signed and sealed this 1st day of June, A. D. 1937.

(Seal) v Henry Van Arsdale Acting Commissioner of Patents.

sad with 'th eee corrections therein of the case in the Patent Office.

rolls rotatably mounted in the disdnrge outlets oi said hoppers forv said streams of granular material from said hoppersontosaid gmdepiateasaidguideplatescmductingsaidstreamswithoutstoppingtheflow thereot directly to said deposit point, valve plates ior controlling the discharge of granular material from said hoppers and means for succeaively operating the valve plates.

12. Apparatus for surfacing rooting material, four hoppers having the discharge outlets disposed in substantially the same horimntal plane and arranged to deliver granular material to the same deposit point, said hoppers being arranged in pairs, each pair having the outlets spaced equi-distances from said deposit point. a guide plate for each pair oi hoppers for guiding the granular material to said deposit point, the individual hoppers of each pair being spaced coal-distances on opposite sides or the point oi delivery of granular material from said homers to said guide plate. g

13. Apparatus fol-surfacing rooting material, comprising tour hoppers having'the discharge outlets disposed in substantially the same horisontalplane and arranged to deliver grit to the same deposit point. said hoppers being arranged in pairs, each pair having the outlets spacedequi-distances from said d p sit point, a guide plateioreachpairoihoppersiorguidingthe granular material to said deposit point,-the discznrxrzci'rs' or coenscriosi Patent No. 2,074,131. r

BENJAMIN S PEHLEY, ET AL.

It is hereby certified that error of the above numbered patent requiring correction as] follows: second column,- line 49, claim 10, after the word "feed" same line, after "material" that a the said Letters Patent should be that the same may conform to the record streams of;

charge outlets of the individual hoppers oieach pair being spaced equi-distanccs oppositesides oi. the point of delivery of granular material from said hoppersto said guide plate, avalve plate controlling the discharge of granular material from each hopper, a distributing roll rotatablv" mounted in the discharge outlet of each hopper. and means for successively operating said valve plates. a

14. Apparatus for surfacing rooting material, comprising tour hoppers having the discharge outlets disposed in substantially the same hori zontal plane and arranged to deliver grit to the same deposit point, said hoppers being arranged inpairs, each pair having the outlets spaced equi-distances from said deposit point, a guide plate for each pair, of hoppers for guiding the granular material to said deposit point. the discharge outlets of the individual ho rs of each pair being spaced soul-distances on opposite sides oi the point of delivery of granular material from said hoppers to said guide plate, a valve plate controlling the discharge of granular material from each hopper, a distributing roll rotatably mounted in the discharge outlet oi' each hopper, and electrically operated control means for opening and closing. said valve plates in desired time sequence.

a BENJAMJN '8. RICHARD A. HOLDSWOR'I'H.

,; .March 16, 1937.

appears in the printed specification I Page 5, insert flowing insert the word directly; and

Signed and sealed this 1st day of June, A. D. 1937.

(Seal) v Henry Van Arsdale Acting Commissioner of Patents.

ead with 'th ese corrections therein of the case in the Patent Office.

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