|Publication number||US2193472 A|
|Publication date||Mar 12, 1940|
|Filing date||Nov 8, 1935|
|Priority date||Nov 8, 1935|
|Publication number||US 2193472 A, US 2193472A, US-A-2193472, US2193472 A, US2193472A|
|Inventors||Meinrad C Bothe, Frank X Pfohl|
|Original Assignee||Logan Long Company|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (6), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
March 12, 1940. Q BOTHE AL 193,472
ROOFING Filed NOV. 8 1935 4 Sheets-Sheet l Invenlofs:
' Me-Lnraci C. BOTLIIQ Frank X. PJOILL QflLe mJZ hXMM March 12, 1940. Q BOTHE ET AL 2,193,472
ROOFING Filed Nov. 8, 1955 4 Sheets-Shee t 2 'Mar h 12,194o a M. QBQTHE Em 2,193 472 ROOFING Filed NOV. 8, 1935 4 Sheets-Sheet 4 I linen/150m Meinmd C; Bofihe Frank X. 1 50111 lit) E@M,M%J+M4/h@ Patented Mar. 12,- 1940 ROOFING Meinrad o. Bethe; Franklin; and Frank x. Pfohl,
* Sharonville, Ohio; assignors to The'Logam Application- Novemberttl 1935, Serial No. 48,800 a 9 Claims. (oral-3'0) 1111! pa y, Chicago, 111., a corporati l Ohio T H The invention relates to the manufacture of yroofin'gmaterials and'includes among its objects and advantages. improvements in assembling a previously impregnatedf -strip with a coating therefor.
In the accompanying drawings:
Figures 1a and 1b are a partial diagram of a roofing machine including equipment according to the inventionf Figure 2 is a perspective view of the mastic mixer;
Figure 3 is a section on line 33 of Figure 2;
Figure 4 is a section on line 44 of Figure 3;
Figure 5 is a detailed view of the drive gearing for the mixer;
Figure 6 is a section of the strip of roofing as it leaves the portion of the machine illustrated in Figures 1a and 1b;
Figure 7 is an enlarged side elevation of one of the applicator units of Figure 1a;
Figure 8 is a plan view of the same applicator; Figure 9 is a front elevation of the applicator of Figures '7 and 8;'
Figure 10 is a partially diagrammatic section of the second applicator of Figure 1a,; 1 Figure 11 is a partially diagrammatic showing of the drive means for varying the proportions of the mastic ingredients; r Figure 12 is an enlarged section of an applica tor roll and the adjacent supports for the moving strip; and
Figure 13 is a plan diagram indicating one manner of cutting the strip of Figure 6 into individual pieces. a .In the embodiment of the invention selected for illustration, the moving strip of felt I is unwound from the usual roll l2 carried by the stand l4. It passes first through the saturating bath l where a relatively fluid asphaltic saturant permeates and saturates the felt. From the saturator I6 the strip passes through a looper and cooler l8 where-its temperature is suitably re duced; a
From the looper and cooler the strip passes through the first applicator unit indicated as a whole by the reference character 20 where it receives a coating of mastic indicated at 22 in Figure 6. The strip l0 then passes through the applicator indicated as a whole by the reference character 24 where it receives a top coating of asphalt 26 and a bottomcoating I25 (see Figure From the applicator 24 the strip passes around a series of drive and feed rolls indicated as a whole by the reference character 21. Before reaching the first roll 28 the strip receives a hopper diagrammatically indicated at 32, and one or both of the first two reaches of thestripthat happen to be turned-with the asphalt25 uppermost may receive the usual light-coating of fine coating of crushed slate 30 or the like, as from a mica or the like, as indicated diagrammaticallyf by the hopper 34 over the first such. reach, and
' the hopper36'over the second. i t r V From the rolls 2! the strip then passes over the scale beam diagrammatically indicated at 38 which is positioned between two sets of rolls 4|! and 42. In making roofing according to Figure 6, the drive rolls 40 constitute a mere support, but the drive rolls 42 are fitted with a special roll 44 shaped to fit the upper contour of the finished strip of Figure 6, and thestrip passes around this roll so that the upper rolls 46 and 48 can grip the strip sufficiently to propel it. From the drive rolls 42 the strip passes on to the usual looping and cutting devices,
v The mastic-22 is a mixture of asphalt of much higher melting point than the 'saturant applied at 16, and mica flakes in the ratio of abcut 26% of mica flakes by-weight, which is about 11% by volume of the finished mixture. This mixture is freshly formed adjacent the applicator 20 and deposited on the moving strip in a hot and p lastic condition. We find that with asphalt of a melting point of 220" F. a temperature of 350 F. is about right for the mastic at the time it is'deposited on the strip I0.
Referring to Figures 2 to 5, inclusive, substantially liquid asphalt is discharged through the pipe 50 into the mixing trough 52 at a temperature of about 380 F. The mica flakes are deposited in a conical holder 54 and fed downward ly out of the holder by a screw conveyor 56. The
resulting mass isthoroughly worked and mixed M in the trough 52 as by paddles. 58 onparallel shafts 60 and 62. These paddles have a slight helical pitch so that in addition to thoroughly working and mixing the materialthey tend to move it toward the discharge end of the trough 52. The discharge end of the trough 52 is provided with a short box 68, and the open bottom of the 'box 68 is partially closed by the discharge plate 10 which ishinged at 72 and may be adjusted as by means offthetension rod 14 passing throughthe bracket 16 and heldin place by adjustment nuts 18'. By this means, and by suitable control of the rate of flow of asphalt and mica into the mixer; the rate of flow out of the mixermay be adjusted to a-nicety to secure prop er action in the applicator 20; From the mixer the material simply falls downward in a stream on the middle of the strip III and is then carried forward by the strip I0 against the calibrating bar I2. I
Referring to Figure 11 we have indicated a source of power at driving the first cone 82 of a variable speed drive. The driven cone 84 has a direct driving connection to the asphalt pump 86, and thus the cones 82 and 84 provide for precise adjustment of the rate of discharge of asphalt from the pipe 50. The driven cone 84 also drives the first cone 88 of a second variable speed drive, and the driven cone is connected to the vertical shaft 92 of the feed screw 56. This enables the operator to make a precise adjustment on the rolls 88 and 99 to secure the desired ratio of mica flakes to asphalt, and then without disturbing that adjustment, to adjust the cones 82 and 84 to a speed s 'tably correlated with the speed of the strip I0.
Referring now to Figures '7, 8, 9 and 1a, the applicator 20 comprises a support 94 on which is the mastic calibrating unit comprising a stationary plate 96 carried by a suitable framework 98. The calibrating bar I2 is tapered toward its center, having a minimum diameter in the middle at I00. In the drawings the taper is exaggerated for the sake of cleamess. The bar I2 does not rotate during operation of the machine, but it is provided with suitable manual means for changing its angular position by rotation from time to time to change the portion of its surface presented to the pile of mastic indicated atIIII in Figure 12. We have illustrated a worm wheel H2 and a manually operated adjustment worm H4 for this purpose. Below and on either side of the vertical plane of the axis of the calibrator I2 the supporting plate 96 carries two spaced cleats H6 and H8. The sheet III, under tension by reason of the tractive effortof the rolls 21, is pulled through under the calibrator I2. At the point where the clearance between the calibrator I2 and the strip is least, the strip is not directly supported against the calibrator but is held up only by its own tension over the short span between the cleats IIS and H8. We have found that with a fixed support for the strip at this point, any little granule or lump in the mastic will wedge and tear the strip, and when the strip begins to tear it is likely to tear completely across and interrupt the operation of the machine. This difficulty is completely eliminated by the use of the spaced cleats H6 and H8, but at the same time the span is so short that the tension of the web is suflicient to make the calibrating action of the calibrator I2 accurate and precise. At relatively rare intervals, a granule in the mastic may stick to the calibrator I2, but when this occurs, instead of tearing the sheet, the granule merely remains in place and scrapes a tiny groove in the mastic as it passes under the calibrator. Whenever this happens, it is a simple matter for the operator to rotate the calibrator "I2 far enough to remove the granule from the point of action. This isusually done by rotating the calibrator in a counterclockwise direction as shown in Figure 7 so that the granule comes up on the inactive side of" the calibrator and can readily be found and scraped off.
In making roofing according to Figure 6, the strip leaving the applicator 20 with the mastic coating 22 in place, passes through a second calibrator in which the calibrating bar I21 is shaped and adjusted to allow a proper clearance for spreading the asphalt layer 26 on the strip. The asphalt in the layer 26 may be of the same or a different composition mastic 22, and preferably of the precise composition best adapted'to receive and retain the grits 39. Referring to Figure 10, after receiving the asphalt 26 the strip roller I22, receiving from that roller a layer of asphalt of the character best suited to cover the under surface of the felt- III and to retain the thin mica coating that will later be applied from hopper 34 orhopper 36 or both. The asphalt applied by the roller I22 is calibrated by a suitable scraper I24 to the correct thickness for the final layer I26. The applicator parts immediately associated with the calibrating roller I2'I are identical in their action with those illustrated in Figure 12. However, the applicator of Figure 10 is provided with adjustment means differing from that of the applicator of Figure '7. In Figure 10, the supporting plate I28 carries heels I30 that support two corners, and near the other two corners we provide contact adjustment means in the form of studs I32 threaded into suitable bosses at I34 and'terminating in rounded contacts I36 which bear on the supporting structure I38. These studs are interconnected by a sprocket chain passing over sprockets I40 so that a workman standing at either side of the machine can turn the sprocket wheel next to him and adjust both corners of the plate simultaneously to vary the thickness of the asphalt coating 26. Both applicators are provided with side guideplates I42 positioned to contact the edges of the moving strip and keep it in proper alignment.
In the applicator of Figure I, quickly adjustable means are provided for Withdrawing the plate 96 a considerable distance from the callbrator I2. The mastic handled by this applicator is rather viscous and congeals quickly, and the clearance thus obtainable is convenient in avoiding any clogging by solidified mastic in case the operation of the machine is temporarily interrupted.
Referring to Figure I, the heels I44 function in the same way as the heels I39. Near the front corners of the plate angle iron brackets I46 project downward for contact with eccentrics I48 rigidly mounted on a transverse shaft I50 pivoted in the supporting structure 94 and provided with an offset I52 to serve as a handle. The calibrator I2 has ends extending past the plates I42 as indicated at I54 in Figure 8, and set screws I56 are mounted in the corners of the framework 96 to engage the inactive portions I54 of the calibrator. In Figure '7, the'plate is illustrated in operative position with the set screws I56 bearing against the calibrator, being elevated to that position by rotating the cams I48 in a clockwise direction until the contact between the set screws I56 and the calibrator stops the upward movement. To control the exact thickness of the mastic coating, the set screws I56 may be adjusted from time to time. In case the operation of the machine is momentarily interrupted, the cams I48 can be quickly thrown in a counterclockwise direction from the position of Figure I, and the whole plate 96 drops down a considerable distance away from the calibrator I2 so that the pile of mastic in front of the calibrator can be pulled through or otherwise removed expeditiously.
In Figure 6 the mastic 22 is illustrated as terminating completely a material distance short of the edges of the strip. To assist the calibrator from that used .for the.
III makes contact with the I2 in securing such a placement of the mastic, I6
. is not of tapered thickness.
roofing machine although they are inactive when tapered material according to FigureG is being produced. Referring-to Figure 1b, the rolls I64,
166, and I68 are used for handling a strip that And the rolls 28,
I19, and 44, which engage the upper face of the mastic, are preferably tapered similar to the calibrator I21, to avoid any slight warping of the material of the strip that might otherwise occur. The applicator of Figure 10 includes the reservoir I12 which is in use, and the submerging roller I14 and companion forming roller I16 which are not in use when making roofing according to Figure 6. When the machine is in use for making ordinary IOOfing, the applicator unit 20 is entirely inactive and has no contact with the moving strip; the calibrator I21 and associated parts are picked up bodily and removed; and the strip is passed under the submerging roller I14 and between the rollers I22 and I16, which are moved close together to function as forming rolls. strip leaving the equipment illustrated in Figures 1a and 1b may subsequently be cut into suitable pieces in any desirable way. In Figure 13 we have indicated a central longitudinal cut at I18; complete transverse cuts at I80 to sever strips; and removal of portions at I82 to subdivide the exposed edges of the strips thus severed into a plurality of projecting tabs.
Without further elaboration the foregoing will so fully explain our invention that others may, by applying knowledge current at the time of application, readily adapt the same for use under various conditions ,of service.
We claim: I
1. In an applicator for spreading mastic material on a moving strip of roofing felt, in combination: means for moving a receiving strip; means for depositing material on said strip; spaced transverse supports underlying said strip beyond the point of deposit on the side opposite said mat-eriah'a stationary wiper engaging the material on said strip, said wiper having an active surface in the form of a surface of revolution of varying diameter, the bight of the space between said wiper and stripbeing intermediate said transverse supports; guide means on either side of the material between the point of deposit and the point of wiping, constrainingsaid material to a spread less than the breadth of said strip; means for adjusting said transverse supports toward and away from said wiper to regulate the thickness of material passing said wiper; means-for turning said wiper to bring any selected portion of said wiper to the bight; the portions of said wiper remote from said bight being accessible for scraping or cleaning the same; and quick acting means for movingsaid supports to an inoperative position remote from said wiperand returning them to the same adjusted operative position.
2. Ina roofing machine, in combination: means for moving a saturated strip; a plurality of applicator units arranged to act successively on said strip; said applicator units including a first unit for spreading a mastic coating of asphalt and mica flakes over said strip in a coating of vary- The finished ing thickness, said coating being of maximum thickness at the center andtapering on either side of the center, said coating terminating entirely along lines leaving a bare space on either side of said coating; a second unit for spreading an asphalt coating over said mastic coating, said asphalt coating being of substantially uniform'.
thickness and extending over said mastic coating and said bare spaces;.a thirdunit for spreading an asphalt coating on the side of said strip opposite said mastic coating; and other units for sprinkling grit on the mastic side and' anti-ad hesion powder on the other side of said strip; said machine including guide rollers engaging said strip; certain of said rollers engaging the said strip after application of the mastic being shaped to conform to the irregular thickness of said strip and constructed and arranged to guide said strip ing thickness, said coating being of maximum 1 thickness at the center and tapering on either side of the center; a second unit for spreading an asphalt coating over said mastic coating; a third unit for spreading an asphalt coating on the side of s'aid strip opposite said mastic coating; and other units for sprinkling grit on the mastic side and anti-adhesion powder on the other side of said strip. l
4. In a roofing machine, in combination: means for moving aflexible strip; a plurality of applicator units arranged to act successively on said strip; said. applicator units including a first unit for spreading a mastic coating of asphalt and mica flakes over said strip in a coating of varying thickness, said coating being of maximum thickness at the center and tapering on either. side of the center; a second unit for spreading an asphalt coating over said mastic coating; a third unit for spreading an asphalt coating on the side of said strip opposite said mastic coating; and
other units for sprinkling grit on the mastic side and anti-adhesion powder on the other side of said strip. i
5. ma roofing machine, in combination: means for moving a saturated strip; a plurality of applicator units arranged to act successively on said strip; said applicator units includinga first unit for applying a coating of varying thickness; and
a second unit for applying a coating of constant thickness on top of said ness.
ing felt, in combination: means for moving a strip of felt longitudinally; means for saturating said strip with asphaltum saturant and permitting the saturant to set; means for depositing additional material on said strip; spaced transverse supports 'in the form of a surface of revolution set above the plane of the upper'surface of said strip; said wiper having a smooth surface free from abrupt.
variations in diameter; the clearance between coating of varying thick- 6. In an applicator for applyingcoating to roofsaid spaced supports being less than the diameter of said wiper.
'7. In an applicator for applying coating to roofing felt, in combination: means for moving a strip of felt longitudinally; means for saturating said strip with asphaltum s'aturant and permitting the saturant to set; means for depositing additional material on said strip; spaced transverse supports underlying said strip on the side opposite said additional material and beyond the point of deposit; means for drawing said material under tension across said spaced supports in a substantially flat plane; and a stationary calibrating wiper engaging the additional material on said strip intermediate said transverse supports; said wiper being in the form of a surface of revolution set above the plane of the upper surface of said strip; said wiper having a smooth surface free from abrupt variations in diameter.
8. In an applicator for applying coating to roofing felt, in combination: means for moving a strip of felt longitudinally; means for depositing material on said strip; spaced transverse supports underlying said strip on the side opposite said additional material and beyond the point of deposit; means for drawing said material under tension across said spaced supports in a substantially flat plane; and a stationary calibrating wiper engaging the material on said strip intermediate said transverse supports; said wiper being in the form of a surface of revolution set above the plane of the upper surface of said strip; said wiper having a smooth surface free from abrupt variations in diameter; the clearance between said spaced supports being less than the diameter of said wiper.
9. In an applicator for applying coating, in combination: means for moving a strip of impervious material longitudinally; means for depositing material on said strip; spaced transverse supports underlying said strip on the side opposite said additional material and beyond the point of deposit; means for drawing said material under tension across said spaced supports in a substantially flat plane; and a stationary calibrating wiper engaging the additional material on said strip intermediate said transverse supports; said wiper being in the form of a surface of revolution.
MEINRAD C. BOTHE.
FRANK X. PFOHL.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2665660 *||Jun 29, 1950||Jan 12, 1954||Olden Roger G||Device for applying liquid to sheets or webs|
|US5496434 *||May 9, 1994||Mar 5, 1996||Payne; Leroy||Structure forming apparatus|
|US5725716 *||May 4, 1995||Mar 10, 1998||Payne; Leroy||Structure forming method and apparatus|
|WO1995030541A1 *||May 4, 1995||Nov 16, 1995||Leroy Payne||Structure forming method, apparatus and resulting product|
|WO1995030542A1 *||May 4, 1995||Nov 16, 1995||Leroy Payne||Structure forming method, apparatus and the resulting product|
|WO1995030543A1 *||May 4, 1995||Nov 16, 1995||Leroy Payne||Structure forming method, apparatus and the product|
|U.S. Classification||118/102, 118/312, 118/126|