US1916095A - Method for making prepared shingles - Google Patents

Description

June 27, 1933. D. A. CUMFER 5.

METHOD FOR MAKING PREPARED SHINGLES Original Filed 001:. 25, 1926- 5 Sheets-Sheet 1 June 27, 1933. D. A. CUMFER METHOD FOR MAKING PREPARED SHINGLES Original Filed Oct. 25. 1926 5 Sheets-Sheet 2 DomldA 6:011:11?

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June 27, 1933. D. A. cUMF ER 1,916,095

METHOD FOR MAKING PREPARED SHINGLES Original Filed Oct. 25. 1926 5 Sheets-Sheet 4 YELLOW CYLINDER RED CYLINDER GREEN CYLINDER s Sheets-Sheet 5 gwwmtoz Jame 27, 1933. o. A. CUMFER I METHOD FOR MAKING PREPARED SH INGL Original Filed Oct. 25, 1926 laborious one.

Patented June 27, 1933 UNIT STATES PATENT FEEQE DONALD A. CUMFER, OF RUTHERFORD, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS,"TO THE PATENT AND LICENSING CORPORATION, 015 BOSTON, MASSACHU- SETTS, A CORPORATION OF MASSACHUSETTS METHOD FOR MAKING PREPARED SHINGLES Application filed October 25, 1926, Serial No. 144,128. Renewed December 13, 1927.

The invention relates to a process and apparatusv for manufacturing mineral coated prepared roofin Prepared roo ng of this general type has been extensively used, but because of its dull or monotonous appearance, its use has been more or less confined to inexpensive structures or buildings. This restricted use, however, cannot be attributed to the quality of the roofing, but solely to the fiat unvarying and monotonous appearance which has not appealed to the eyes of that portion of the purchasing public who desire a roofing structure presenting a most pleasing and ornamental effect so as to be appropriate for use with building structures of the more expensive type.

Many efforts have been made to overcome the foregoing object ons without complete success. It has been proposed to manufacture what are commonly known as multicolor shingles. Under present conditions, such shingles are manufactured by amachine having a partitioned bin for the mineral matter, the partitions in the bin substantially coinciding with the notches in the shingle. In this practice, on a single Width machine, where there are three tabs to the strip, each hopper must be filled with three differently mixed charges of slate. The slate to go into each hopper must, therefore, be mixed by hand, before it is placed in the hopper, this operation naturally being a very In running the roofing with these three shades, the result is a sheet in which there are three bands or stripes extending lengthwise of the web. The web is cut at the end of the machine into cross cut strips, producing thereby a strip with three difierently colored tabs. It will be readily appreciated that if these strips with only three colors were put on a roof of any sub stantial area, the said three colors would repeat in a mathematical sequence, and the result is that the roof gives a checkerboard appearance which is decidedly unsightly. In an effort to overcome this, it has been proposed to run four different or independent stocks in a manner similar to the above described, in each stock of which the shingle tabs are given different colors, or have the colors placed in different sequence by the proper pre-mixing of mineral matter applied thereto. It has been necessary to run at least four of such stocks, and to then combine them in a regular order so that a finished package which have an irregular sequence of all four of such stocks. It should be borne in mind that in such a practice these four difierent stocks, of which there are three tabs to each strip, or twelve shingle tabs to the assembly, will have at least six or more colors. it is not a simple matter to produce a desirable color blend effect with such tabs because of the necessity of selecting proper color blends, and also the necessity of arranging the sequence of colors that is necessary to avoid mathematical repetition in colors on the tabs. Such an assembly operation has been exceedingly expensive, and even when carried out to perfection, it does not give the roof the artistic appearance it should have.

It is an object of this invention to provide a process and apparatus overcoming the foregoing objections by producing mineral coated shingle strips having predetermined areas, zones or tabs thereof coated with predetermined blended minerals. in regulated ratios whereby the roofing at all times presents a highly artistic and ornamental appearance. In this process, the minerals of different colors, are withdrawn from suitable supplies and combined in measured predetermined quantities to form charges that are thereafter, when in a thoroughly mixed condition, applied to predetermined areas of the roofing material. These successive charges or color combinations vary so that the mineral on one tab or area of the roofing strip is of a shade or appearance properly contrasting with the shade or appearance of the mineral on an adjacent tab.

1' have found that the roofing can be given a most artistic and pleasing appearance when a uniform quantity of mineral or grit is applied to each predetermined area or tab of the strip. The mineral applied to each tab is preferably composed of a series of differently colored grits, and to obtain the artistic appearance referred to, the ratio of one colored mineral or grit relative to the ratio of a proper adjustment of said feed rolls so as another must be definitely controlled and varied to give the adjacent tabs of a strip contrasting shades properlyblending with one another when the roofing is laid. In forming the successive charges of mineral from the variously colored grits, I mix determined and measured quantities of various solid colored minerals, such as red, green, and ellow, in definite varying proportions, whic charges are successively formed and progressively applied to predetermined areas of the roofing material.

It is a further object of the invention to provide a process and apparatus by means of which a wide range in variations in the color combinations may be obtained with a minimum adjustment of the parts of the apparatus. That is to say, the process is one in which the shades or blends of the mineral charges may with case be varied by changing the quantity of one or more minerals entering said charge to another, which naturally changes the shade of the charge which is to be applied to the tab of a shingle strip.

While the process is particularly useful in the production of a roofing having predetermined areas or tabs covered with suitable blended minerals to give the shades desired, and to distinguish from the dull, monotonous efi'ect obtained by the use of solid colors, it will, of course, be understood that it is entirely within the province of the operator in carrying out this process and in operating the apparatus to/apply charges of blended minerals of predetermined colors numerous tabs of the roofing material, and to also coverother tabs with mineral of a solid color should such a color combination be found desirable.

It is a further object of this invention to provide an improved apparatus for measurmg the relative quantities of differently colored minerals forming each charge and in successively applying such charges to predetermined areas of the roofing material. This is accomplished by utilizing in the apparatus a plurality of mineral feed rollers having in the periphery thereof pockets of a uniform length and width but varying in depth, as well asblank peripheral surfaces.

. These feed rolls are adjustably mounted so that the pockets or blank surfaces of one feed roll may be adjusted relative to the others to cause the application of predetermined quantities of the variously colored grits to a determined zone on a carrier, which charges are successively formed and of a predetermined shade when mixed, and thereafter are deposited on selected zones or areas of the roofing material in the desired order. be appreciated that the feed rolls all rotate in unison and that the relative quantity of one grit with respect to another that is to form a given charge, may be freely varied by passes.

It will.

.area of the carrier, forming a charge giving the selected shade. I

The apparatus furthermore embodies othor improved mechanical devices and combinations which are novel and which will be more fully hereinafter described.

In the drawings.

Fig. 1 represents a side elevation of color machine showing its relative location in a roofing machine.

Fig. 2 represents a plan view of same.

Fig. 3 represents afront elevation of same.v

Fig. 4 represents a detail of one of the slate feeding cylinders.

Figs. 4a, 4b and 40, represent a diagraminatical development of slate feeding cylinders.

Fig. 5 represents a cross section through a slate feeding cylinder; and, I

Fig. 6 represents a diagrammatical section of roofing showing relative amounts of slate on each area.

Referring now more particularly to the drawings, wherein like reference characters indicate corresponding parts, the numeral 1 designates the base of the apparatus having supporting legs of any convenient type. Near its upper end there is provided a pair of separated rolls 2 and 3. The roll 3 is preferably mounted for rotation in the frame of the machine and is not adjustable. The roll 2, however, is adjustably received in slideways 4 in each side of the machine, the bearing shaft of this roll being supported at each end by blocks 5 which are adjusted by the action of the adjusting screws 6.

Around the rolls 2 and 3 a collector belt 7 This belt is slowly rotated in the direction of the arrow upon a driving operation of the roll 2. Obviously, the rolls are adjustedso as to maintain the belt taut.

This collecting belt or carrier will be more definitely referred to hereinafter.

Disposed on the frame of the machine and above the carrier or collecting belt are a series of hoppers 8, 9, and 10 which extend transversely across the machine and are suitably supported by the legs thereof. These elongated hoppers may each have aseries of partitions 11 as shown in Figure 3 to, in effect, divide each hopper into a series of sections. The hoppers 8, 9, and 10 receive batch supplies of difl'erently colored mineral. For instance, the hopper 8 may receive a supply of yellow grit or mineral, the hopper 9 a supply of red. and the hopper 10. a supply of green. These are known as solid colors, it being, of course, apparent that other colored grits can be used, depending upon retaoas the character of the roofing strip that is to be produced.

As has been hereinbefore pointed out, it is one of the objects of this invention to provide a process and apparatus by which roofing material may be produced which has various areas or tabs thereof covered with suitably blended grit or mineral matter so as to give the roofing strip a pleasing and ornamental appearance to and destroy the dull and monotonous appearance so general in prepared roofing. in order to apply to predetermined areas or tabs of the roofing strip differently colored minerals in regulated or determined relative quantities so as to properly shade the resultant composite charge which is to be applied to a given area of the roofing material, feed rolls 12, 13, and 1d are provided, one being disposed at the bottom of each mineral hopper. One of these feed rolls is shown in detail in Fig. 4. Inasmuch as each feed roll is of the same specific construction, a description of one will suliice for all. Each feed roll is adjustably mounted on a driving shaft 15, being retained in its adjusted position by a fastening bolt or screw 15 that passes transversely through a portion of the feed roll and engages the driving shaft 15. By means of this adjustment any feed roll may be turned to a determined position on its shaft and retained in such adjusted position. Each feed roll tightly fits the bottom of its feed hopper, so that no material can be delivered from a hopper except by the rotation of its feed roll. For the purpose of illustrating this invention, each feed .roll is provided in its periphery with a series of pockets 16, 17, and 18 respectively, all of dilferent depths and therefore of different capacities. The periphery of each roll also has predetermined blank surfaces. In the showing, three series of the pockets referred to are disclosed, but, of course, this number can be amplified. It will be understood that the depth of the various pockets in each series of the different feed rolls vary, as will more fully be hereinafter pointed out, and it will further be appreciated that the formation of these pockets in a given roller are not uniform across the roll, although having substantially the same width and length, but vary beneath various of the partitions 11 for the purpose of applying to the carrier belt on adjacent zones thereof different quantities of grit. Each, roll is, of course, removably connected with its supporting shaft and various rolls are available having pockets therein of different and varying depth so that the appropriate roll may be selected, this, of course, depending upon the color combination desired. Each hopper carries a semi-circular guard 20 which extends around the lower portion of the feed roll for the purpose of preventing the discharge of the material contained in any pocket until such pocket passes beyond. the end of the guard, at which time the contained material is readily deposited on the advancing carrier belt traveling beneath the pocket.

is before stated, each feed roller is of the same construction with the exception, of course, that the pockets arranged therein may, and generally are, of different capacities or depth in order that the selected quantity of is all a matter of timing, the operator after having worked out a pattern, then merely selects feed rolls having the proper formed pockets and adjusts these rolls on their supporting shafts '15 by the adjusting and retaining pin 15 so that one roll is properly coordinated with another roll whereby the one, two or more rolls will deposit given quantities of differently colored grit on a common-zone of the carrier. 4

All of the feed rolls are adjusted to be driven in unison. The carrier belt operating beneath these rolls is alsodriven in synchronism with the rolls. Various forms or driving mechanism may be employed, but for the purpose of illustrating this invention, ll have shown an aligned shaft 21 carrying a gear 22 meshing with a gear 23 on a shaft 24. The shaft 2 has a sprocketwheel 25 thereon around which a chain 28 passes. This chain also engages a sprocket 29 on a transverse shaft carrying a gear 30 meshing with a gear 31 on the carrier feed roll 3. A. clutch mechanism 26 also connects the shaft 24 with a gear 27 that in turn engages a gear 27 on the feed roll for the asphalt coated fabric material'to which the mineral matter is to be applied.

To operaie the metering or mineral feeding rolls 12, 13, and 14c, I provide at one end of the roll 3 a sprocket 22, around which a drive chain 23 passes, this drive chain traveling around a sprocket 24: attached to the shaft of the metering roll 12. This metering roll 12, at its opposite end, also carries a gear 30 meshing with an interposed gear 31' which in turn meshes wilh a gear 32 mounted on the feed roll 13, while a similar gear 83 transmits the power from the feed roll 13 to a gear 35 on the feed roll 14. In this manner, the feed rolls'all operate in the same direction, and, of course, in synchronism. The widh and length of the slots in the metering rolls, 12, 13, and 14c, are'identical. The speed at which these rolls is driven relative to the speed of the carrier belt is such that as the metering roll advances a width of one inch, the carrier belt advances nine inches. As the carrier belt advances nine inches, the roofing sheet or material passing beneath (his belt advances nine inches, which is the determined area to be covered. These relative movements can, of course, all be varied depending upon the type of shingle that is to be manufactured.

The carrier belt 2 passes beneath the feed rolls and the grit or mineral is applied to this belt in predetermined charges covering given areas of the belt. It will be appreciated, of course, that the adjacent zones or A strip of fibrous material such as commonly used in the manufacture of prepared roofing runs beneath the baflies 32. This strip is represented by the reference character 33. It is impregnated and coated with an adhesive material such as asphalt, bitumen, etc., and onto this adhesive surface the charges of mineral matter are deposited. If, for example, the pockets in the roll are say, one inch wide, the relative speeds are so controlled that when the peripheral travel of a metering roll is one inch, the carrier belt will have traveled nine inches, and the roofing sheet will have traveled nine inches. In this way, regardless of the speed of the sheet, the metering andv deposition of slate, in accordance with a predetermined color blend pattern, may-be. accomplished. The speed of the varioiis parts of the apparatus and the movement of the roofing strip 31 are so timed that a charge of a determined area on the carrier belt 2 will cover a predetermined zone of the roofing strip, or in common practice will cover a tab which may be 12" X 9" in area; The mineral matter so applied is of the desired shade by reason of the fact that it is composed of determined quantities of the differently colored minerals from the hoppers 8, 9 and 10. The roofing strip, after receiving this mineral, passes on around a suitable sanding unit embodying the rolls 34 and 34, and thence to the suitable severing apparatus where the sheet is cut into strips, each strip preferably embodyin g three tabs. Any loose grit is picked up at the sanding unit and deposited into the hop per 35 from where suchgrit is collected and may be again used in any approved manner.

As will be clearly appreciated, the process herein involved is one by which roofing material is produced wherein the various tabs thereof are coated with grit or mineral matter of different colors in predetermined relative quantities. It will be furthermore understood that the adjacent tabs, for instance, of a roofing strip, have difierent shades so as to destroy any dull or monotonous efiect. In Fig. 6. I have showndiagrammatically the surface of a section of a roofing strip produced by this operation. In this diagram the tabs A, A, A and A of course, all have received grit charges that have been formed and placed on the carrier belt 2 by the action of the feed rolls between a pair of the baffles 11. Likewise, the tabs B, B, B and 13, all have received mineral charges that were deposited on the carrier belt by pockets in the feed rolls disposed between an adjacent pair of said baflies 11 and the same applies as to the tabs C to C D to D E to E and F to F In this embodiment of the invention, the roofing sheet is of sufficient width to provide six tabs thereon or two strips, as each strip contains three tabs when the sheet is cut by severing mechanism known in the art. The arrows 36 indicate the direction of movement of the sheet through the machine. It is, of course, understood that each tab or predetermined area of the roofing strip receives a certain definite minimum quantity of mineral matter, this being a matter of calculation, to assure the adequate covering of the surface of the tab. All of the tabs must receive this total amount of grit or mineral matter, but the proportions of one colored mineral relative to another applied to the adjacent tabs will vary. In the diagrammatic showing, the tab A has been covered with a. charge of grit, 3/ of which is green in color and yellow. Assuming that the total depth of a pocket formed in one of the feed rolls must be .333, to provide the amount of grit necessary to cover an area of say 12" wide x 9" long, the rolls will have been so timed and adjusted that the green roll 14 will have a pocket of .199", depositing this quantity of green slate or mineral on an area or zone of the carrier belt that has already received from a suitably sized pocket in the yellow feed roll 12, .132 of yellow grit or mineral matter. The t-ab'marked A in the diagrammatic view has received a charge of mineral matter containing a green colored mineral and a red colored mineral. 'This means that the operator has adjusted his rolls so that at the time a given zone or area of the carrier belt is to receive this charge, a pocket in the red roller 13 of a capacity of .166" deposits its charge on'this carrier, while at the time this charge reaches the green roll 14 a pocket in thisroll of 0.166" passes from beneath the guard 20 and drops this mineral on the zone aeraoee that had received the red charge. During the time that this zone of the carrier or belt passed beneath the yellow feed roll .12, one of the blank or unbroken spaces 19 of this feed roll is passing around the guard 20, prohibiting the application of any of the yellow grit to the zone or area of the carrier that received the charge subsequently applied to the tab A The same operation occurs in the measuring of the various charges to be applied to all of the other tabs of the roofing sheet. The feeding rollers are all adjusted after a color combination has been selected by the manufacturer so that the roofing strip will receive the Various charges of dilferently colored mineral grit to be applied to predetermined zones or tabs ofthis sheet so that the adjacent tabs or zones are properly shaded.

Fig. 6 diagrammatically discloses the action of the feeding rolls, and represents the dimensions of the successive pockets of the three feed rolls 12, 13, and 14, entirely across each roll to produce a roofing sheet wherein the tabs receive charges containing ratios of differently colored minerals as shown in Fig. 5. In this chart, A represents the mineral matter fed by the green and yellow rolls to cover the tab designated by reference character A in Fig. 5. A likewise represents the capacity of the pocket feeding the green and yellow grit or mineral matter to form the charge covering the tab A The tab A, as shown in Fig. 5, has received a mineral charge containing certain quantities of yellow, green, and red grit. By referring to the diagrammatic chart in Fig. 6, it will be seen that the feed rolls 12, 13, and 14 all have pockets of .111 which deposit the desired quantity of grit in supet-imposed layers on a given zone of the carrier belt during the advancing of this zone through the machine. As before stated, when a color combination has been designed which has a pleasing appearance, then the feed rolls are selected and adjusted so that the pockets formed therein are of sufficient depth to produce the charges desired, and are so timed as to deposit the contents of each pocket on the proper area or zone of the carrier belt as it is advancing through the machine. v

Fig. 6 furthermore contains reference characters B to B inclusive to F to F inclusive, and ,such reference characters correspond with the reference characters applied to the tabs shown in Fig. 6. For instance, to produce the charge of red and yellow for the tab B, the feed roller 12 for the hopperv 8 has a pocket of .111" depth discharging its contents at a predetermined time to a determined zone or area of the carrier belt, which belt then advances beneath the roll 13 at which time a pocket in this roll of .222 discharges its contents of red mineral matter on 55' this zone, the carrier belt then advancing around the drive roll 3, but receives no mineral matter from the feed roll 14, inasmuch as an unbroken portion of this feed roll is traveling around theguard 20 when this predetermined area of the carrier belt passes beneath this roll. It will be understood that in the illustration herein given, it has been assumed that a pocket having a total depth of .333 is necessary to apply the proper amount of grit to cover one of the tabs, but, of course,

this selection has been made merely for the purpose of illustrating this invention, and can be changed at will.

It will also be appreciated that the color combinations, as herein shown, are subject to change at any time. Regardless of the color combinations used, it will be apparent that charges containing regulated quantities of one colored grit relative to another can be successively formed from batch supplies of differently colored minerals and thereafter applied when in a thoroughly intermixed condition to determined tabs or zones ofa roofing sheet so as to give such tabs a proper and variable shade, destroying the dull and monotonous appearance, incident to the use of solid colors. The relative quantities of the differently colored grits forming each I charge are subject to instant change, permitpockets in the various rolls will vary in depth. I propose to utilize liners or fillers to be inserted in the various pockets in the feed rolls by means of which the carrying capacity of each pocket can be varied to produce any desired number of color combinations. These liners will naturally change the depth of a pocket, and by keeping available a substantial number of liners of various depths, a multitude of color combinations can be effected with the use of a minimum number of rollers.

In this specification, I have disclosed metering rolls for measuring the quantities of material deposited on the carrier belt. It will be, of course, understood that it is within the scope of this invention to use any suitable measuring devices by means of which definite quantities of minerals could be deposited on the carrier belt within certain limits of accuracy.

The term mineral employed in the claims is intended to embrace all surfacing materials for roofings of a granulated or pulverulent type which may be employed in ject matter of the claims.

Having thus described my invention,

7 what I claim is:

cent zones thereof with blended grit coatings I of contrasting shades.

2. The method of producing mineralcoated roofing material, which consists in discharging from batch supplies differently coloredminerals, in metering the quantity of mineral discharged from each batch to provide composite charges of such minerals in predetermined ratios and of a total quantity suflicient to cover a determined area of a roofing sheet, in varying the color of such minerals forming the successive charges to be applied to succeeding zones of the roofing material by varying the ratio of the grits, in depositing such preformed charges on the roofing material successively to. cover the adjacent zones thereof with blended mineral coatings substantially contrasting in shade.

3. A method for producing mineral coated roofingmaterial, which consists in providing batch supplies of differently colored minerals, in discharging predetermined regulated quantities of such minerals to form successive charges of sufiicient quantities to cover a determined area of the roofing sheet, in continuously varying the ratio of one colored mineral relative to the other released from said batch supplies, to form the succeeding'charges of contrasting shade in applying the successive charges to succeeding zones of a roofing sheet to form mineral coated zones thereon with the shade of one zone contrastingwith the shade of an adjacent zone.

4. The method of producing contrasting zoned mineral coated roofing strips cons sting in covering the tabs of such strips with successive charges of grits in substantially equal total quantities, said method being characterized by continuously varying the quantity of one colored grit relative to another forming the succeeding charges, in applying such charges to the succeeding tabs of the shingle strip concurrently with the travel thereof whereby each tab of said strip is coated with differently colored grits in redetermined relative quantit es contrastlng with the shade of the grit applied to an adjacent tab.

5: A method of producing mineral coated roofing strips, consisting in continuously applying to a series of zones of a carrier in substantially equal total quantityv differently colored mineral charges in predetermined measured ratios, in continuously varying the color by changing the proportion of one mineral relative to the other forming the succeeding charges applied to the successive zones of the carrier, in transferring such charges from each zone of the carr'er to a predetermined area of the roofing sheet of fibrous material whereby the adjacent areas of the sheet are coatedwith charges of blended minerals of predetermined relative colors and ratios. with the shade of one area contrasting with the shade of the adjacent area. 6. A method of producing mineral coated roofing material, consisting in applying to a carrier on predetermined areas thereof charges of m neral matter in substantially equal total quantities, in continuously varying the color by changing the quantity of one mineral relative to the other forming adjacent charges on said carrier, in mixing the differently colored minerals forming each charge and in applyng such charges to predetermined zones of a strip of roofing material to coat adjacent zones with mineral coverings presenting contrasting shades.

7. A method of producing mineral coated.

roofing material, comprising applying to a moving carrier differently colored minerals in predetermined ratios to produce thereon a series of charges with each charge being in suflicient quantity to cover a determined area of a roofing sheet, in continuously varying the color by changing the ratio of one grit relative to another forming the adjacent charges on the carrier, in effecting a mixng ofthe difi'erently colored minerals torming each charge, and in depositing such charges successively on predetermined areas of an advancing strip of roofing material whereby adjacent coated areas present contrasting shades.

8. Themethod of manufacturing mineral coated roofing materials, wh ch consists in continuously advancing a strip of roofing material through a machine, in depositing on predetermined areas of said continuously advancing strip composite mineral material containing regulated relat ve quantities of differently colored minerals. and in continuously varying, in timed relation with the advancement of strip, the composition of the charges applied to succeeding areas to give such areas contrasting appearances.

9. A method of manufacturing roofing, conssting in advancing a strip of roofing material, in coating such material with a composite mineral matter, consisting of regulated predetermined quantities of differently colored grits, in continuously changing the composition of such m neral matter applied to one portion of the strip relative to the composition applied to the succeeding portion thereof and in timed relation with the advancement of the strip, whereby different portions of the strip are coated with compos te mineral matter presenting contrasting appearances.

10. A step in the method of manufacturing prepared roofing, consisting in applying to predetermined successive areas of the surface of the roofing, composite mineral matter containing relative metered quantities of differently colored grits, and in continuously varying the composition of such mineral matter applied to one zone of the strip relative to the composition applied to the succeeding area and concurrently with the travel of the strip, for the purpose described.

11. A method of manufacturing roofing, consisting in withdrawing from batch supplies of differently colored minerals regulated varying quantities of certain of such minerals, combining such regulated quantities of material, substantially as withdrawn, to produce a composite mixture of a determined shade, in applying such mixture to the surface of a roofing strip, and in continuously varying the relative quantit'es of differently colored grit applied to an adjacent surface zone of the roofing strip to provide a surface having zones thereof contrasting in appearance.

12. A method of manufacturing contrasting zoned, mineral surfaced roofing materials, which comprises forming a charge of a plurality of metered surfacing minerals sufiicient to cover a predetermined area of a roofing base, continuously varying the composition of the succeeding charges, con

currently with the travel of the base and dcpositing such charges on succeeding predetermined areas of the base.

13. A method of manufacturing contracting zoned roofing materials which comprises the steps of combining a plurality of metered surfacing materials of a quantity sufficient to cover a predetermined area of a roofing base, and continuously varying, concurrently with the travel of the base, the ratio of the surfacing materials to obtain succeeding charges and depositing such charges on succeeding predetermined areas of the base.

14. A method of manufacturing contrasting zoned mineral surfaced roofing materials whichcomprises the steps of forming a charge of a plurality of metered surfacing minerals, sufficient to cover a predetermined area of a roofing base, continuously changing the color of the succeeding charges by varying the ratio of the grits comprising the charge and in successively depositing said charges on succeedingly predetermined areas of the base.

15. A method of manufacturing contrasting zoned roofing materials which comprises the application of metered quantities of differently colored surfacing materials sufit cient to cover a predetermined area of a roofing base, in continuously changing the composition of the succeeeding charges by metering varying ratios of the surfacing materials concurrently with the travel of thebase, and in depositing said surfacing materials on succeeding predetermined; areas of the base, whereby one area is strikingly contrasted from the adjacent area.

16. A method of manufacturing roofing consisting in continuously withdrawing from batch supplies of differently colored minerals, concurrently with the travel of the sheet, metered quantities of a plurality of such differently colored minerals, continuously combining said metered quantities of differently colored minerals substantially as withdrawn to produce a plurality of composite mixtures, each of said mixtures being of a predetermined shade, and in applying said mixtures to adjacent zones on the surface of the roofing sheet.

17. The method of manufacturing roofing, which comprises forming concurrently with the travel of the sheet a charge composed of a predetermined mixture of differently colored minerals and a second charge coniposed of a different predetermined mixture of colored minerals, and applying said charges to the surface of the sheet to form zones of different shades thereon.

18. A method of manufacturing roofing consisting in continuously withdrawing from batch supplies of differently colored minerals, concurrently with the travel of the sheet, metered quantities of the differently colored minerals, continuously combining said metered quantities of minerals substantially as withdrawn to produce a plurality of differently colored streams of minerals, each of said streams being composed of a composite mixture of a predetermined shade, and applying said streams to the surface of a roofing sheet in adjacent zones.

19. The method of producing cyclical mixtone effects in roofing surfaced with contrasting granules which comprises intermixing the granules as they are supplied to a run of the roofing, and in cyclically varying propor-' tions.

20. The method of producing mixtone effects in roofing surfaced with contrasting granules which comprises maintaining bulk feed supplies of differently colored granules,

in discharging as streamsmetered quantities of granules contrasting in color, in intermixing said granules after withdrawal from the bulk supplies and applying the intermixed granules to a sheet of roofing and in cyclical-. ly varying the proportions of the intermixed granules withdrawn from the bulk supplies.

21. A method of producingv Inixtone effects in roofing surfaced with contrasting granules which comprises wthdrawing contrasting granules intermittently in metered quantities from bulk feed supplies, in intermixing such metered quantities of contrasting granules after withdrawal from the bulk supplies and applying said intermixed granules to a run 0 roofing and in cyclically varying proportions.

22. The method of producing mixtone effects in roofing surfaced with contrasting granules which consists in maintaining independent bulk supplies of differently colored granules, in withdrawing in metered streams differently colored granules from said storage supplies, and in iutermixing said streams of granules after withdrawal from the bulk supplies to 'be supplied to a run of roofing, and in cyclically varying the progortions of differently colored granules withrawn from the bulk supplies.

23. A method of manufacturing mineral, coated roofing materials which consists in providing independent bulk supplies of different colored ranules, in forming charges from said sup fiies by withdrawing streams of differently colored granules in predetermined ratios, in intermixing such withdrawn streams after withdrawal to produce a desired shade, and in continuously varying the proportions of the granules withdrawn as streams from the bulk supplies to form charges of contrasting colors to be applied to successive zones of the roofing material, and in applying such charges to the roofing material to cover adjacent zones thereof with intermixed differently colored granules presenting contrasting shades.

24. The method of producing mixtone effects in roofing surfaced with contrasting granules which consists in maintaining independent bulk supplies of differently colored granules, in releasing determined quantities of such difierently colored granules from the storage supplies and in intermixing the granules after their release and applying the charge thus formed to a run of roofing and in cyclically varying the proportions of the differently colored granules released from the bulk supplies.

25. The method of producing mixto'ie effects in roofing surfaced with contrasting granules which comprises maintaining bulk feed supplies of granules of different primary colors, in releasing determined metered quantities of said granules contrasting in color, in intermixing the granules after their J release from the bulk supply, and as they are supplied to a run of roofing, and in cyclically varying the proportions of the released intermixed granules withdrawn from the hulk supplies.

26. The method of producing blended and a varied mixtone effects in roofing surfaced with contrasting granules which comprises maintaining hulk feed supplies of granules ofdifi'erent primary colors, in successively releasing predetermined proportions of certain of said granules and permitting them to gravitate downwardly after their release from the bulk supplies, in intermixing the released granules on their way to the roofing andin cyclically varying the proportions of the released granules to form successive contrasting charges applied to the roofing.

27. The method of surfacing roofing which comprises the advancing of a sheet of roofing material, maintaining a series of bulk supplies for granules of different primary colors. in releasing predetermined measured quantities of the granules from said sources of supply in timed relation to the advancement of the roofing strip and in intermixing the withdrawn granules to form charges applied to the moving roofing sheet and in continuously and cyclically varying the relative proportions of the released granules to form successive charges of continuously contrastingcolors.

28. The method of producing mixtone effects in roofing surfaced with contrasting Y granules which consists in maintaining elevated bulk supplies of differently colored granules, in continuously advancing the run of roofing below the outlets of said bulk supplies, in releasing, in cyclically varying proportions, said granules from the elevated supplies in synchronism with the advancement of the run of roofing, effecting the mixture of the withdrawn granules to form charges applied to the roofing of continuously varying color combinations.

29. The method of surfacing roofing comprising the steps of advancing a roofing base, separately withdrawing from bulk supplies differently colored surfacing materials, intermixing the same and forming a mixture of definite, determined composition, and applying the mixture thus formed to the advancing roofing base.

' 30. The method of producing mixtone effects in roofing surfaced with contrasting granules which comprises maintaining bulk feed supplies of differently colored granules, in discharging as streams metered quantities of granules. contrastin in color, in intermixing said granules a ter withdrawal from the bulk supplies to form a composite mixture composed of predetermined composition, and applying the same to a sheet of roofing.

31. The method of producing mixtone effects. in roofingwith contrasting granules comprising the steps of withdrawing differently colored granules from bulk supplies,

thoroughly intermixing said granulesafter withdrawal from the bulk suppliesand forming a charge of predetermined, definite composition, and applying said charge to an advancing sheet of roofing.

32. The method of producing mixtone efforts in roofing with contrasting granules comprising the steps of withdrawing differently colored granules from bulk supplies, thoroughly intermixing said granules after withdrawal from the bulk supplies and forming a charge of predetermined, definite composition, applying said charge to an advancing sheet of roofing, and in successively changing the composition of the succeeding charges whereby to create colored areas on the roofing of different shades.

of the operator, in sub-dividing the roofing base in difierently colored strips and arranging the difierently colored strips in bundles, successively, as they are sub-divided from the strip whereby the .strips may be laid upon the roof in their consecutive arrangement to produce the pre-conceived design.

34. In the method of producing mixtone effects for use in surfacing roofing, the steps which comprise withdrawing surfacing materials of different characteristics from bulk supplies and in thoroughly interadmixing the same to secure a mixture of predetermined, definite composition, and in varying the composition of the mixture to produce subsequent mixtures of diiferent but definite and determined compositions.

In testimony whereof I aflix my signature.

DONALD A. CUMFER.

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