US1998078A - Method and apparatus for producing mix-tone roofing - Google Patents

Description

April 16,1935. w. FREEGARD 9 METHOD AND APPARATUS FOR PRODUCNG MIX TONE ROOFING Filed Sept. 12, 1 27 s Sheets-Sheet 1 .INVENTOR, I

BY Lu/g ATTORNEYS WITNESSES April 16, 1935'. .w. FREEGARD 8 METHOD AND APPARATUS FOR PRODUdING MIX-TONE ROOFING Filed Sept. 12, 192'? 3 Sheets-Sheet 2 FIG; N

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METHOD AND APPARATUS ,FOR PRODUCING MIX-TONE ROOFING Filed Sept; 12, 1927 s Sheets-Sheet 5 SAH'IWESSES: I 1.\'I 'EXTOR:

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Patented Apr. 16, 1935 METHOD AND APPARATUS FOR rnonucmc MIX-TONE ROOFING William Fr'eegard, Elizabeth, N. 1., assignor to The Barber Asphalt Company, Philadelp Pa., a corporation of West Virginia Application September 12, 1927, Serial No. 219,114

Claims.

This invention relates to the manufacture of mix-tone roofings by intermixture of contrasting materials in the roofing surface, and involves novel methods of mixing as well as novel ap- It is particularly adapted to prepared roofings of the grit-surfaced bituminous type.

For some time, pleasing color effects on roofs have been sought by combinations of grit-surfaced shingles or the like presenting a plurality of different colors. In order to avoid gaudiness, it is found necessary to gofurther than the mere employment of shingles of several colors: i. e. it is essential that (in general) each shingle present a plurality of colors, and that these colors blend into one another, even on the individual shingle. Mere uniform intermixture of colors in all shingles does not give sufiicient variety of color: it is necessary that the mixture of colors vary over the roof. The only practical way of securing such results, heretofore, has been by making lots or runs of roofing with difierently-proportioned mixtures of the colors employed, and mingling shingles cut from the different lots in each package. This, however, has required extra operations to mix the different lots of colored granulesin the first instance, and to sort the different colored shingles into the packages afterward,--as well as the complication of making roofing with various different mixtures.

In the manufacture of prepared roofing shingles according to my present invention, all such drawbacks and complications are avoided by supplying different colored granules to one run of roofing in a mixture of continually or frequently varying proportions. This is done automatically by my machine hereinafter described. In this way, a gradual blending of colors is produced on the roofing sheet, as well as a varying predominance of the different colors in diiferent areas, and continuous'streaks of any one color are avoided. And when shingles cut and packaged from the sheet in the usual manner are laid on the roof in-the order in which they come character desired, colored either natu a y 9 artifically, and in the latter case either plain dipped or glazed with a vitrified glaze. Proper proportions of natural-colored slate granules also give very pleasing effects. In general, they should all be of approximately the same size and general type of fracture.

The roofing sheet may be made on an ordinary composite roofing machine, and may consist of a, rag felt or burlap base suitably saturated and coated with bitumen.

In the drawings, Fig. I is a somewhat schematic elevation of roofing apparatus suitable for the purposes of my present invention.

Fig. II is a similar view at right angles to Fig. I, from the left of that figure.

Fig. III shows a vertical mid-sectional view through a portion of the apparatus, taken as indicated by the line III in Figs. II and IV.

Fig. IV shows a plan view of the apparatus shown in Fig. DI.

Figs. V and VI are plan views of certain parts of the apparatus shown in Fig. III,--Fig. V being taken as indicated by the line V-V,-tin Fig. HI.

Fig. VII shows a vertical section taken as indicated by the line VIIVII in Fig. VI.

Fig. VIII is a fragmentary plan view of a part shown in Fig. HI, taken as indicated by the line VI]IVIII in Fig. III.

Fig. DI shows a plan view of one of the parts,

taken as indicated by the line IXIX in Fig. III.

In the apparatus here shown, the variously colored surfacing granules are supplied to the mixer Ill from a series of small hoppers or bins a, b, c, d, e, directly over the mixer. As shown,

the granules of oneof the materials are raised i from a receiving bin or hopper f by a bucketchain elevator g which delivers them through a hopper h to 'a belt conveyor i that dumps them into the bin 0 through a hopper 7'. Colored granules are supplied the bins a, b, d, e, through chutes k, l, m, n, from separate compartments in storage bins o, p. From the hoppers a, b, c, d, e, the granules are delivered to the mixer l0 through chutes q, 1, s, t, 11.. From the mixer ID, the mixed granules are delivered through chutes v, w, :2: to

., the trough or hopper of a commercial type of spreader 1 which distributes the mixture uniformly over the still hot bituminated fabric z travelling beneath the spreader.

The sheet of bituminated fabric after passing beneath the spreader 11 travels over rolls 60, usual- 1y provided in coating machines, and excess slate is removed from the sheet by means of a scraper 6| associated with the lower of the rolls 60. The excess slate falls onto an endless conveyor 62,-

actuated by a chain 63 in driving connection with a driven shaft 64 from which the mixer I is driven through the medium of a chain 65 and gearing 66. The conveyor 62 extends transversely with relation to the sheet and dumps the excess slate into hopper I from which it is transferred to bin 0.

As shown in Figs. III and IV, the mixer I0 is supported by a horizontal bracket or top plate I I projecting from a support l2. The chutes q, r, s, t, u, from the supply bins a, b, c, d, e, terminate in outlet openings I3 in the plate I I, these openings being circularly arranged and equally spaced. A central boss- I5 on the plate I I (suitably braced by integral radial webs I6) projects below the plate, as well as above it, and affords external bearing for a regulating valve disk I 1, located beneath theplate, and resting on a flat ring or flange member I8 secured to the boss by screws I9. As shown in Fig. V, the valve disk l1 has quadrangular or arcuate openings corresponding to the outlet openings I3 in the plate II, and the eifective outlet openings for the different colored granules can be concurrently adjusted and regulated by turning the valve disk I1 one way or the other, by means of a handle 2|. If desired, the outlet openings I3 may be regulated and varied individually, by means of radially movable shutter slides 22 set into the upper surface of the disk I1, and having their bevelled edges engaged in undercut rabbets on the disk.

Besides the regulation afforded by the valve disk I1 and its slides 22, the relative flow of material from the different outlets I3 is also continually controlled and varied by suitable means, such as a disk rotatably mounted on a stud 23 in the boss I5 of the plate I I. As shown in Fig. VIII, this rotary flow control disk 25 has three openings 26, 21, 28,-the last considerably larger than the others, and located about 90 from the nearer opening 21. As the disk 25 revolves, these openings 26, 21, 28 successively and periodically pass beneath each of the outlet openings I3, so that the diiferent granules are periodically released or allowed to flow in quantities or charges corresponding to the sizes of the openings 26, 21, 28 and the length of time required for them to pass the stationary openings.

The varying charges or streams of granules flowing from the supply openings I3 under control of the disk 25 are received and collected by a conical hopper 38 mounted directly beneath the disk 25, and here shown as provided with a hub 34 through which extends the lower end of the stud 23. In the present instance, a ball bearing 36 is interposed between the hub 34 and a head 35 on the lower end of the stud 23, and a similar ball bearing 31 is interposed between the rotary flow control disk 25 and the upper side of the hub, 34. Thus the disk 25 and the conical hopper can rotate freely relative to one another, as well as relative to the stud 23 and the plate I I. As shown in Figs. III and IX, the conical hopper 30 is divided into a plurality of segmental compartments by diaphragm partitions 38,--including a larger substantially semi-circular compartment 39, and a couple of smaller substantially quadrant compartments 40, H. The larger compartment 39 has an axial bottom outlet 42 to which is connected the chute or spout V, while the compartments 40 and 4| have lateral outlets 43, 44 to which are connected the chutes or spouts w and x.

As shown in-Figs. I, II, and III, the upper rim 33 of the hopper 30 and the periphery of the flow control disk 25 have gear teeth that mesh with pinions 50 and 5| on an upright drive shaft 52 mounted in a bearing boss 53 on the plate I I and in a bearing bracket 54 projecting from the support I2. As will be seen from the drawings, the

peripheral gears on the disk 25 and the hopper rim 33 are of different, diameters (the latter slightly smaller than the former,) so that as the shaft 52 revolves, the disk and hopper will be driven at different speeds (the disk slightly faster than the hopper). As shown especially in Figs. III and IV, the shaft 52 may be driven from a horizontal shaft 51 mounted in bearing brackets 58 on the support I2, through bevelled gearing 55, 56.

In the operation of the apparatus, surfacing granules feed by gravity from the bins a, b, c, d, e, to the supply openings I3. As each of the valve disc openings 26, 21, 28 passes beneath each of the openings I3, 2. charge or stream of the corresponding granules flows through the disc opening into the hopper compartment 39, 4D, or 4| that happens to be beneath. The size (area) of this granule stream depends on the size of the disc opening; being largest for the large opening 28. At each revolution of the disc 25, therefore, three charges from each bin a, b, c, d, e, flow into the hopper 30. The duration and frequency of flow depend on the rate of revolution of the disc 25: for sufiiciently rapid revolution of the disc, there is a practically continuous but varying stream of granules from each of the supply openings I3.

From these considerations, alone, it will be apparent that the composition of the total flow of granules from the hopper 30 varies from'time' to time as the different sized disc openings 26, 21, 28 pass beneath the several supply openings I3.

If the compartmented hopper 30 should remain stationary, or be revolved at the same rate as the disc 25, its effect on the exact way in which the diiferent granules are combined would be constant and of minor importance so far as the variations in granule stream composition and color effects on the roofing sheet are concerned. However, when this hopper 30 revolves at a different rate than the disc 25, it introduces additional variation; and much greater variety of granule stream composition and color eifects become possible.

For with diiferential revolution of disc 25 and hopper 30, the identity of the openings I3 that deliver into any given hopper compartment during one complete revolution of the hopper will vary, as well as the identity and size of the disc openings 26, 21, 28 through which such delivery into a given hopper compartment takes place. Sometimes one or another disc opening 26, 21, or 28 will be located over one or another of the hopper septa 38 a greater or less angular distance in the travel of the hopper; sometimes three, two, one or none of the disc openings will continue over the large hopper compartment 39 a whole revolution or more; sometimes two, one, or none of the disc openings will remain over one or another of the smaller hopper compartments 40, 4| in similar way; and sometimes the number and size of the disc openings over a particular hopper compartment will change during a revolution intermixed by the intermixture of the several granule streams from the hopper compartments.

' This effect is enhanced by the different arrange- 'ment of the several hopper spouts v, w, 3:, so that they deliver at different distances from the axis of revolution of the hopper 30 and from the cen ter of the spreader hopper,both longitudinally and crosswise of the latter.

Besides the variety and blending of granule colors produced by the mixer ID as above indicated,

"there is a further blending due to the temporary accumulation of the mixed granules in a pile or pool in the mixer hopper. The larger the accumulated pool, the greater the blending,,and

- vice-versa.

From the foregoing description, it will be apparent that the differential revolution of disc and hopper greatly increases the variety,

their angular relations to one another and to the stationary parts are exactly the same. While great variation in this respect is possible, I have obtained good results with a cycle corresponding to the passage of about seventy-five feet of roofing sheet 2 beneath the spreader y.

' By angular adjustment of the regulating disc H, the total rate of fiow of the granules can be adapted to different linear speeds of the roofing sheet 2 without substantially afiecting the variation in composition of the ultimate granule mixture. By adjustment of the various slides 22, the proportions of different granules can be varied and controlled according to the color effects desired. Other differences can, of course, be realized by putting the same granules in two or more of the supply bins a, b, c, d, e, or.vice-versa.

I have not in this application claimed the apparatus for producing mix-tone roofing herein disclosed, since such forms the subject matter of an application for patent filed by me November 19, 1927, Serial Number 234,308, as a division of this application. c

Having thus described my invention, I claim:

1. The method of manufacturing mineral coated roofing including variably combining granules supplied from supplies of different colors, discharging streams of varying compositions from supplied from supplies of different colors, discharging from the variably combinedn granules streams of continuously varying compositions and having different locations, and applying the contents of said streams to roofing material.

4. The method of manipulating mineral coated roofing including variably combining granules supplied from supplies of different colors, discharging from the-variably combined granules streams of continuously varying compositions and having different varying locations, and applying the contents of said streams to roofing material.

5. The method of manufacturing mineral coated roofing including forming temporary batches of continuously varying compositions from granules from supplies of different colors, said batches being of different compositions, delivering streams from the respective batches, the streams having different varying locations, and applying the contents of said streams to roofing material.

6. The method of manufacturing mineral coated roofing including forming temporary batches of continuously varying compositions from granules from supplies of different colors, said batches being of different compositions, delivering streams from the respective batches, the streams having different continuously varying locations, and applying the contents of said streams to roofing material- 7. The method of manufacturing mineral coated roofing including forming temporary batches of continuously varying compositions from granules from supplies of different colors, said batches being of different compositions, delivering streams from the respective batches, the streams having different varying locations, the streams being directed upon overlapping areas, whereby admixture of granules from the various streams takes place, and applying the contents of said streams to roofing material.

8. The method of manufacturing mineral coated roofing including advancing a roofing strip, variably combining granules supplied from supplies of different colors, discharging streams of varying compositions from the'variably combined granules, said streamshaving locations varying transversely of the direction of motion of the roofing strip, and applying the contents of said streams to the roofing material.

9. The method of manufacturing mineral coated roofing including advancing a roofing strip, variably combining granules supplied from supplies of different colors, discharging streams of, varying compositions from the variably combined granules, said streams having locations varying continuously transversely of the direction of motion of the roofing strip, and applying the contents of said streams to the-roofing material.

10. The method of manufacturing mineral coated roofing including intermixing supply streams of contrasting'r'oofing surface granules in a plurality ofcombined streams of continually 'FREEGARD.

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