US2074130A - Process and apparatus for surfacing roofing - Google Patents

Description

March 16, 1937. a. s. PENLEY PROCESS AND APPARATUS FOR SURFACING ROOFING Filed Oct. 26, 1953 2 Sheets-Sheet l INVENTOR 13. 5: Fem/er BYZ/A ATTO R N EY March 16,1937. B. s. PENLEY 2,074,130

PROCESS AND APPARATUS FOR SURFACING ROOFING Filed Oct. 26, 1933 2 Sheets-Sheet 2 INVENTOR B. 5. Pen /e ATTORN EY Patented Mar. 16, 1937 PATENT OFFICE PROCESS AND APPARATUS FOR SURFACING ROOFING I Benjamin S. Penley, Yeadon, Pa, assignor to The Barrett Company, New York, N. Y., a corporation of New Jersey Application October 26, 1933, Serial No. 695,311

16 Claims. (01. 91-43) This invention relates to the surfacing of roofing, and more particularly, to the formation of colored composition roofing, such as felt base roofing saturated with bituminous waterproofing material, coated with bituminous waterproofing material, and having colored granular material partially embedded in the coating on the exposed face of the roofing. The term roofing material is used in a broad sense and is intended to ina clude material employed for roofing, siding, and

other analogous protective or decorative purposes.

The application ofgranular material of one color or blend of. colors to coated roofing material during the continuous passage of the roofing material through a roofing machine is well known. It has been proposed to feed a roofing sheet or web beneath a series of hoppers containing difierently colored granules and operated intermittently in such way that all the hoppers concurrently dropped granular material on the moving sheet while the sheet progressed a pre-- determined distance, thus forming transverse stripes on the sheet. Then the flow of grit from all the hopperswas interrupted while the sheet was moved a distance equal to the length of the roofing material on which grit had been showered from the hoppers. An additional hopper was provided to pour granular material over the whole sheet continuously, so that any unsurfaced portions of the sheet were covered with granular material.

I Such procedure has the disadvantages that excessive amounts of grit require handling, and color bands of desired color cannot be formed on the roofing since the grit applied from the hopper continuously feeding granular material onto the sheet commingles with the grit delivered from the other hoppers, thus afiecting the color appearance of the grit on the roofing. Furthermore, the intermittent feeding of granular material simultaneously from a plurality of hoppers during the movement of the roofing is difiicult to synchronize with the movement of the roofing; hence, contiguous portions of certain of the differently colored bands may blend into each other throughout to an undesirable extent, or may fail to meet on the felt, with consequent detriment to the appearance of the finished elements. It is an object of this invention to provide a surfacing procedure for readily and efliciently applying transverse stripes of differently colored granular material to a roofing web. In the preferred embodiment of this invention, successive stream, each of differently colored granular material, are fedto a support, forming a continuousstream thereon, contiguous areas of whichare of contrasting color. This continuous stream is fed to the coated roofing base. This invention compre- 'hends such procedure as well as the apparatus for practicing the same.

Other objects and advantages will appear from the following detailed description, taken in connection with the accompanying drawings, in 5 which- Fig; 1 is a side elevation of surfacing apparatus embodying this invention;

Fig. 2 is a fragmentary side elevation, partly in section, on an enlarged scale as compared with 10 Fig. 1, and shows the mechanism for operating a gate or valve controlling the discharge of granular material from a hopper;

Fig. 3 is a side elevation, somewhat diagrammatic in character, showing equipment for makl5 ing composition roofing;

Fig. 4 shows a fragmentary plan view of roofing surfaced in accordance with this invention Fig. 5 is a side elevation, partly in section and parts of the hoppers broken away, and illustrates 20 a modified form of surfacing apparatus embody ing this invention;

Fig. 6 is a. fragmentary vertical section through one of the hoppers of Fig. 5; and 1 Fig. 'I is a detailed showing of a front eleva- 25 tion of one of the cams and an associated switch of the electrically operated control for operating the gates or valves which .control the discharge of granular material from the hoppers.

Referring to the drawings, with particular ref- 30 erence to Fig. 3, a sheet of fibrous material I ll, which may be, and preferably is, of the usual roofing felt'made of rag fiber, paper stock, or

other fibrous material. with or without suitable fillers, as well known in this art, is fed by feed 35 rolls ll from the usual paper making machine or feed roll into a looping device I2. From the looping device i2, rolls i3 feed the sheet into any suitable type of saturating apparatus, indicated generally by the reference numeral l4. saturating 40 tank l5 may contain suitable cementitious waterproofing composition, such as asphalt or other bituminous material, utilized for the impregnation and saturation of roofing felts.

Rolls i6 and I1 feedthe saturated sheet to a 45 second looping device l8. The passage of the saturated fibrous sheet or base through the looping'device i8 gives the saturant an opportunity to impregnate the base thoroughly and to cool. Rolls l9 and 2| feed the saturatedsheet from 50 the looping device l8 to the coating apparatus 22, involving a pair of coating rolls 23, 24, a guide roll 25 being interposed between rolls 2i and the coating apparatus 22. Coating roll 24 is rotatably mounted in a tank 26 which may 5 contain bituminous material, such as asphalt or other cementitious, waterproofing substance suitable for coating roofing felt. Bituminous material may be applied to the top of the sheet by means of a pipe 21 having a spout of a width ap- 5o proximately equal to that of the sheet. As the sheet passes between the coating rolls 23, 24, the underside is completely coated by roll 24. The coating material delivered by pipe 21 is spread 5 uniformly over the top side by the coating roll 23, excess coating material passing over the edges of the sheet and draining into the tank 26.

Immediately after leaving the coating appliance 22 and while the coating material is still hot, soft and tacky, the coated sheet passes through the surfacing apparatusindicated generally by the reference numeral 30. The surfacing apparatus involves five hoppers, 3|, 32, 33, 34, and 35, each having discharge outlet or spout 36 in which is rot'atably mounted a distributing roll 31. The drive for roll 31 is preferably geared to that for the rolls or drums 58 and 59, hereinafter described, which pull the sheet through the apparatus; hence, the feed of granular material to the sheet is proportional to the movement of the coated sheet. While five hoppers are shown in Fig. 1, it will be understood that any desired number of hoppers, depending upon the number of transverse bands or stripesit is desired to form on the roofing sheet, may be employed. The hoppers 3| to 35 are arranged in stepped relation, hopper 3|, furthest removed horizontally from the discharge point of the endless conveyor belt 38 disposed beneath the hoppers, being positioned closest to the conveyor belt, and the hopper 35, closest to the discharge end of the conveyor belt 38, being positioned the greatest distance vertically above the conveyor belt 38. By this arrangement of the hoppers, the time interval required for the fall of particles from each hopper to the conveyor belt 38 and the movement of the particles on the conveyor belt 38 to the deposit point A is substantially the same.

40 Each hopper extends across the full width of the roofing web and is provided with a valve plate or gate 39 pivoted as at 4| and secured to an arm 42. Since the gates and the operating mechanism therefor for all hoppers are of like construction, only one will be described in detail. As shown in Fig. 2, arm 42 is pivoted at 43 to a long arm 44 which passes through a guide slot 45 in a support 46. End 41 of the lever 44 is pro vided with a cam roll 48 arranged to travel in a 60 cam track 49 on the cam 5|, keyed to shaft 52. Shaft 52 has one cam for each hopper 3| to 35, inclusive, and the cams. are so arranged that the gates 39 of the hoppers 3| to 35 are operated in timed sequence, flow of grit from one hopper being interrupted by the closing of the valve plate 39 while flow of grit from a second hopper is simultaneously initiated by the opening of valve plate 39 associated with the second hopper. Differently colored grit is supplied to each hopper.

In operation, as the coated sheet passes beneath the surfacing device 30, grit of one color is fed from one hopper by the rotation of the distributing roll 31 therein, say hopper 35, and flows onto the belt 38, which is preferably driven at a uniform linear speed at least equal to that of the web. The belt delivers the grit to the discharge point A, the grit leaving the conveyor belt 38 and gravitating onto the continuously moving coated sheet or web passing therebeneath.

A guide plate 53 may be suitably mounted to guide the movement of the grits from the conveyor belt onto the coated sheet. Upon passage of the sheet through one unit, in the instant case, the width of stripe I, 2, 3, or 4 (Fig. 4),

the valve plate of hopper 35 is closed and the valve plate of another hopper, say hopper 34, is 4 simultaneously opened, so that grit is delivered from hopper 34 onto the conveyor belt 38. The closing of the valve plate controlling the discharge of grit from hopper 35 and the opening of the valve plate controlling the discharge from hopper 34 is effected substantially simultaneous- 1y so that the grit delivered from hopper 34 forms a continuous stream on conveyor belt 38. Thus, in efiect, differently colored grit is delivered from each of the hoppers 3| to 35, the contiguous streams merging on conveyor belt 38 so that a continuous stream, contiguous areas of which are of different colors, is fed by the conveyor belt 38 to the coated sheet passing therebeneath. This continuous stream forms on the coated sheet transverse stripes to 5 (Fig. 4) each of different color and extending transversely of the length of the sheet.

In the embodiment of the invention shown on the drawings, the cams 5| are all keyed to one shaft and the valve plates 39 are operated in timed sequence so that stripes of uniform width are formed on the coated sheet. If desired, the cams or the electrical control hereinafter described may be designed and arranged so that all valve plates do not remain open for the same time interval but one or more of the plates 39 is open for a longer time than the others so that stripes of different widths, and not of uniform width, are produced.

After being surfaced as hereinabove described, the sheet passes about reversing roll 54, which functions to partially embed the mineral granules in the plastic coating. Any excess granules fall from the surfaced sheet into a hopper 55 whence they may be sent to any one of hoppers 3| to 35 or may be otherwise used. In the continued passage of the surfaced sheet, it travels next under hopper 56. Powdered talc, mica; or other anti-stick composition capable of rendering the back of the sheet non-cementitious is disposed in hopper 56. This talc or other material may be discharged from the hopper 58 by a distributing roll 51 onto the coating on the back of the sheet in the form of a layer covering substantially the entire width of the sheet. The thus covered sheet then passes over reversing roll 58, which partially embeds the talc in the sealback coating and imparts a smooth surface to the back of the sheet. Excess talc falls from the sheet as the latter passes from reversing roll 58 to the first of a series of calender rolls, each designated by the reference numeral 59 which function to feed the sheet through the coating and surfacing apparatus.

From the calender rolls 59, the sheet is fed by feed rolls 6| through a looping device 62, where the coated and surfaced product is given an opportunity to cool. Feed rolls 63 feed the surfaced sheet to the cutting cylinders 64 which may cut it longitudinally of the web and transversely into strip shingles having differently colored transverse stripes on the tabs extending along .one longitudinal edge thereof.

Figs. 5 to '7 disclose a modified form of apparatus for applying granular material to the coated sheet. The electrical control of Figs. 5 to '7 is preferred since it functions to operate the gates more quickly than the cam mechanism of Figs. 1 and 2. Fig. 5 shows four hoppers, 1|, I2, 13, and 14, the discharge outlets of which are dis posed in the same horizontal plane. The hoppers are arranged in pairs C and D, pair C be- 'ing constituted of hoppers 1| and I2 and pair D of hoppers 13 and 14. The pairs of hoppers C and D are disposed egui-distances on oppoline passing through the deposit point 15 where the grit or other granular material from the hoppers is delivered onto the coated sheet. A guide plate 16 is arranged to receive granular material from hoppers 1|, 12 and a second guide plate 11 is disposed to receive grit from the other two 10 hoppers, 13, 14. These guide plates may be of steel and may be equipped with suitable vibrators. Hoppers 1|, 12 are disposed equi-distanoes on .opposite sides of the point represented by reference numeral 19 where I grit is deposited from these hoppers onto the guide plate 19. Guide plates 19, 8| are associated with hoppers 1|, 12,

respectively, to guide the discharge of grit from these hoppers onto the plate 16. Hoppers 13, 14

are disposed horizontally equi-distances from de- 20 posit point 82. Guide plates 83, 84 are associated with hoppers 13, 14, respectively, to guide the flow of grit from these two hoppers onto the guide plate 11. With the arrangement of hoppers shown in Fig. 5, the path of movement of 25 the granules from each of the hoppers to deposit point 15 is substantially the same in extent. 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 since the speed of rotation of the distributing rolls in each of the hoppers is substantially the same.

As shown on Fig. 6, an adjustable plate 85 is disposed in one wall of the hopper and functions to regulate the extent of the opening 89 through which granular material gravitates to the base portion of the hopper. Each hopper has rotatably mounted therein a fluted distributor roll 31. As hereinabove indicated, the drive for this roll is preferably geared to that for the calender rolls 59 which pull the sheet through the apparatus. Rotation of rolls 31 in each hopper functions to agitate the granular material therein, and when the gate or valve controlling the discharge of granular material is open, to discharge a stream of granular material therefrom. .When the gate controlling the discharge of granular material is closed, as shown in dotted lines on Fig. 6, the gate interrupts the discharge of granular material, the continued rotation of the distributing roll functioning to agitate the material at the base of the hopper maintaining the granules in a loose condition sothat upon subsequent opening of the gate to the full line position shown in Fig. 6, discharge of the granules occurs immediately. It will be noted from Fig. 6 that the distributing rolls are rotated in such direction that the granular material fed thereby has an initial velocity in the direction of fall the moment the valve plates are opened. This insures uniform application of the grit throughout the surface of the roofing.

Each hopper is equipped with a solenoid 81, the core 88 of which is pivoted at 89 (Fig. 6) to an arm 9|, in turn pivoted at 92 and secured to the gate or valve 39. The core of the solenoid is constructed and arranged, as well known in the electrical art, so that upon the interruption of the flow of current through the solenoid, the core drops, pushing down on lever 9| and causing the gate or valve 39 to swing outwardly to the full line position shown on Fig. 6. Upon energization of the solenoid, the core is moved upwardly to swing the lever or arm 9| upwardly,

the switch opens.

causing the gate 99 to move to the dotted line position shown on Fig. 6. site sides of the vertical plane represented by a the solenoids will now be described. Electrical One circuit forenergizing and deenergizing conductors 93, 94 (Fig. 5) communicate with a suitable source of E. M. F. The solenoids 81 are connected in parallel with the conductors 93, 94 by suitable conductors and each solenoid has connected in series therewith and individual thereto a switch 95. When the switch individual to a solenoid is closed, as will be understood, the solenoid is energized, causing the core to move upwardly to close the valve plate 39 operated thereby. The switches 95 are arranged to be opened and closed by cams 99, each individual to a switch and all keyed to a shaft 91 arranged to be rotated at a constant speed by an electric motor (not shown) or other suitable source of power. Each cam 96 has a raised portion 91' and a. depressed portion 98, the raised portion being arranged to contact with the lower leaf spring 99 of the switch 95 to cause engagement of the contacts I00, thereby closing the switch 95. When the depressed portion 98 of the cam 96 comes below the leaf spring 99 of the switch,

The raised and depressed portions of the cams on shaft 91 are arranged in desired relation to permit opening and closing of the switches 95 in desired sequence.

As shown on Fig. 5, the switch'at the extreme left is open so that the solenoid associated with hopper 14 is deenergized and the gate of this hopper maintained in open position whereas the other switches 95 are closed; hence, the solenoids in circuit therewith are energized and the gates of the remaining hoppers maintained closed.

Upon rotation of shaft 91,- the switch at the extreme left (Fig. 5) is closed and another of. the

switches opened, causing deenergization of the 1 solenoid in circuit with the open switch and the opening of the gate or valve of the hopper having the solenoid in circuit with the open switch.

It will be noted that this invention provides a surfacing procedure for successively applying transverse stripes of differently colored granular material to a roofing web. Since the time interval required for the flow of grit particles from each hopper to point A is substantially the same, the interruption of the flow of one stream and the substantially simultaneous initiation of the flow of the second stream results in the grit constituting the leading end of the second stream being disposed contiguous to the grit constituting the tail end of the first stream. Hence, a continuous stream, contiguous areas of which are of. contrasting color is fed by the conveyor belt onto the coated sheet moving therebeneath, the grits forming well defined stripes or bands and this without leaving any portion of the asphalt orother bituminous coating layer unsurfaced.

Since certain changes in carrying out the above proces 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 partitions dividing it into compartments, each of which is supplied with differently colored granular material so that each transverse band I, 2. 3, 4', and 5 (Fig. 4) instead of being constituted of a single color, as shown in 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. Instead of forming bands of uniform width the cam-operated control mechanism of Fig. 2 or'the electrically operated control of Fig. 5 could be adjusted so that some gates are open for longer periods than others, thus forming differently colored bands of different widths.

I claim:

1. Apparatus for surfacing a sheet of roofing material comprising means for moving the sheet longitudinally, a plurality of stationary hoppers for containing granules of different characteristics, each hopper having a discharge outlet extending transversely across the entire-width of the sheet, means for flowing streams of granular material from said hoppers through said discharge outlets, and means for sequentially effecting cessation of the flow of said streams whereby transverse bands of surfacing material are deposited from said hoppers onto said roofing sheet, each of said bands extending across the entire width of the sheet and each being constituted substantially entirely of granular material from one of said sources.

2. The process of surfacing a sheet of roofing material which comprises successively feeding onto a longitudinally moving support a plurality of differently colored streams of granular material extending transversely of said support fmm a plurality of sources of said material respectively, and applying said material from said sup- 40 port to a roofing sheet without substantially mixing the particles from one source with those from another source, thereby forming differently colored transverse stripes on said sheet.

3. The process of surfacing roofing which comprises coating a felt base with cementitious waterproofing material, feeding a stream of granular material from a source of such material onto said roofing sheet, interrupting said stream of granular material, initiating a second stream of granular material of different characteristics from another source and applying said second stream to said roofing sheet in contiguous relation to said first named stream, each of said streams extending across the entire width of said sheet to form transverse stripes of different appearance thereon, the successive flow of said streams preventing substantial mixing of the granular material of said streams.

4. The process of forming vari-colored roofing which comprises applying a stream of colored surfacing material from a single source to a roofing base at a substantially uniform rate, interrupting the fiow of said stream and initiating the flow of another stream from a second, differently colored source at a substantially uniform rate to form stripes on said base each of which corresponds in color to the granular material of one of said sources.

5. In a process of surfacing roofing material by applying granular material from a plurality of differently colored sources thereof to a roofing sheet, the steps comprising flowing a stream of said material extending transversely of said sheet from one of said sources and applying it to a portion of said sheet to form a colored transverse band thereon, interrupting the flow of said stream of granular material and substantially simultaneously initiating the fiow of a second stream of granular material of different color extending transversely of said sheet from another of said sources and applying it to said sheet to form a differently colored transverse hand thereon, and interrupting the flow of said second 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 said sources whereby a continuous layer of surfacing material is applied to said sheet, said layer being composed of transverse bands, each constituted substantially entirely of granular material from one of said sources, the time intervals required for the travel of the individual particles from each of said plurality of sources to the sheet being substantially the same.

6. The process of manufacturing shingles which comprises continuously feeding a coated web in the direction of its length, successively applying streams of difi'erently colored granular material from a plurality of differently colored sources thereof to said web to form differently colored stripes thereon, said streams extending transversely with respect to the direction of movement of said web, the flow of each of said streams from its source taking place only while the streams from the remainder of said sources are interrupted, each of said streams forming a band corresponding'in color to the color of the source from which it is fed and forming a band extending transversely across said web, and cut.- ting said web longitudinally of its length into strip shingles having tabs along one longitudinal edge thereof.

'I. The process of surfacing roofing which comprises feeding a roofing sheet longitudinally, successively feeding from a plurality of sources of differently colored granular material a plurality of differently colored streams of such material extending transversely with respect to said sheet v and applying said transversely extending streams to said sheet, thereby forming differently colored transverse stripes thereon, the color of each of which stripes is the same as the color of one of said sources.

8. The process of surfacing roofing material which comprises successively feeding differently colored streams of granular material from a plurality of sources thereof respectively, onto a moving support in timed relation to form a continuous stream thereon, and applying the said continuous stream to a roofing sheet thereby forming colored stripes thereon, the color of each of which corresponds to the color of the granular material of one of said sources.

9. The process of surfacing roofing material which comprises continuously feeding a cementitious sheet beneath a moving support, continuously and successively feeding differently colored streams of granular material from differently colored sources of such material onto said moving support to form on said support a continuous stream having differently colored areas, the color of each area of said stream being the same as the color of the granular material of a corresponding source, and applying said stream to applying substantially parallel transverse bands of granular material of difierent appearance to said ,roofing sheet, said last named means comprising a plurality of stationary sources of granular ma- 5 terial of different characteristics, said sources extending transversely of the direction of movement of said roofing sheet, means for continuously feeding the coated sheet beneath said sources, means for flowing a stream of granular l0 material from one of said sources and applying said stream to said sheet to form a transverse band thereon, means for interrupting the flow of said stream from said source, means for successively initiating the flow of a second stream of granular material from another of said sources for applying said second stream to said sheet in substantially parallel relation to said first named stream, each of said streams forming a transverse band on said sheet constituted substantially entirely of granular material from one of said sources.

11. In apparatus for surfacing roofing, means for continuously feeding a roofing sheet, means for coating the sheet with cementitious waterproofing material, a plurality of stationary hoppers, each containing differently colored granular material, and extending above the sheet across the width thereof, means for discharging a stream of granular material from one hopper and applying said stream to a portion of the sheet to form a stripe of the color of the granular material in said one hopper extending across the sheet, means for interrupting the discharge of granular material from said one hopper and means forsubstantially simultaneously initiating the discharge of a second stream of granular material from another hopper and applying said second stream to another portion of the sheet to form another stripe of the color of the granular material in said last named hopper extending across the sheet.

12. In a roofing machine in combination, means for continuously moving a sheet of roofing material, a plurality of independent stationary sources of granular material of different characteristics located above the path of movement of said roofing sheet, said sources extending transversely of the direction of movement of said roofing sheet, means for initiating fiow of. a stream of granular material from one of'said sources and flowing said stream onto a portion of said sheet to form a transverse band thereon, means for interrupting said stream and successively initiating the fiow of a stream fromanother of said sources 65 and flowing said second stream to another portion of said sheet to form a second transverse band thereon, said sources and applying means being constructed and arranged so that the time interval required for travel of the granular mate- 60 rial from each of said sources to said sheet is substantially the same.

13. In a machine for surfacing roofing material, means for coating the roofing sheet, a plurality of stationary hoppers each containing differently colored granular material, means for continuously feeding the coated sheet beneath said hoppers, andmeans for discharging granular material from each of said hoppers while preventing the flow of granular material from 70 the remaining hoppers, and means for interrupting the flow of granular material from each of said hoppers while initiating the flow from another of said hoppers.

14. The process of surfacing a sheet of roofing material which comprises providing a plurality of sources of surfacing material of different characteristics, flowing from one of said sources onto said sheet for a predetermined interval of time 5 a stream of surfacing material extending transversely of the sheet to form a band constituted substantially entirely of surfacing material of characteristics corresponding to the characteristics of the surfacing material of said one source, 1Q said band extending transversely of said sheet, discontinuing the flow of surfacing material from said one source and flowing from a second source onto said sheet for a second predetermined interval of time a second stream of surfacing material 15 of diflerent characteristics, said second stream also extending transversely of the sheet, to form a second transverse band on said sheet, said sec- 0nd band being constituted substantially entirely of surfacing material from said second sources 20 15. The process of surfacing a moving sheet of roofing material which comprises providing a plurality of individual, difierently colored sources of surfacing material extending transversely of the sheet across the entire width thereof, flowing 25 a stream of surfacing material extending transversely of said sheet from one of said sources at a substantially uniform rate for a predetermined interval of time onto said sheet to form a transverse band of predetermined width thereon extending transversely entirely across said sheet, said band being constituted substantially entirely of granular material from said one source, discontinuing the fiow of granular material from said one source, flowing a stream of differently 35 colored granular material extending transversely of said sheet from a second source at a substantially uniform rate for another predetermined interval of time onto said sheet to form a second hand of predetermined width thereonysaid sec- 40 0nd band being constituted substantially entirely of granular material from said second source and extending transversely substantially entirely across said sheet, the bands of surfacing material from said plurality of sources covering the 45 entire roofing sheet Without substantial overlapping of contiguous bands.

16. In apparatus for surfacing roofing material in combination, means for continuously feeding a cementitious sheet of roofing, a conveyor disposed above said sheet and arranged to move at substantially the same linear speed as said sheet, a plurality of hoppers having discharge outlets extending transversely with respect to said conveyor, said hoppers being disposed above said conveyor in stepped relation, the hopper remote from the discharge and of the conveyor being closest to the conveyor and the hopper closest to the discharge end of the conveyor being BENJAMIN S. PENLEY.

Images