US1596449A - Method and machine for making roofing elements - Google Patents

Description

Aug 1?, 1926, 1,596,449

C. E. RAHR METHOD AND MACH INE FOR MAKING ROOFING ELEMENTS Filed Augnst 26, 1924 2 Sheets-Sheet 1 Aug. 17 1926. 1,596,449

C. E. RAHR METHOD AND MACHINE FOR MAKING ROOFING ELEMENTS Filed Au ust 26, 1924 2 Sneets-Sheet 2 lawman/$02 Ufuesifiivf fair l taln'ng any special steps to this end.

Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE. C.Q

aims-ms. E.

- comramr,

BAHB, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR TO THE FLINT'KOTE OF BOSTON, MASSACHUSETTS, A CORPORATION 'OF MASSACHUSETTS.

mrron AND, moms For. MAKING. noorma ELEMENTS.

Application and august 26, 1924. serial m. 784,154.

Prepared roofing is now commonly made 'by forming a continuous web of fibrous material, such as rag felt, on a paper machine and saturating and coating the web or sheet with asphalt or similar waterproofing material. A surfacing of granular material such as crushed slate is often partially embedded in the coating to provide a fireproof surface of pleasing color, and which also acts to protect the asphalt from exposure to the weather. After the sheet, material is thus prepared it is cut into roofing elements to pack for shipment.

One of the forms in which such material is cut is the so called strip shingle, which comprises a strip having shingle-simulating tabs along one edge defined by narrow slots or cutouts between them. The stock cut out when the slots are formed thus comprises saturated, coated, and surfaced material which is unreclaimable waste. p

sides the loss of paper stock, asphalt and surfacing material. represented by these cutouts there is also the expense of carting off from the mill and disposing of this rapidly accumulating waste where it will not be objectionable.

According to the present invention the production of this unreclaimable waste is 80 entirely avoided byforming the web of fibrous material with the. slots thereln as by so forming the cylinder molds that pulp is not deposited thereon over areas corre sponding in position and arrangement to. the slots in theweb before it is cut into strip shingles. The saturant, coating, and facing materials thus fail to be deposlted over these areas without the necessity of 40 For a more complete understanding of this invention reference may be had to the accompanying drawings, in which Figure 1 is a somewhat diagrammatlc side elevation of a multi-cylinder paper machine designedto function according to this invention.

Figure 2 is a fragmentary elevation of acylindermold therefor. Figure 3 is a cross section on line .3-3 of Figure -2.

Figure 4 a fragmentary perspective of a web of sheet material as it comes from the machine.

Figure 5 is a view similar to Figure 4,

but showinga modification.-

Figures 6, 7 and 8 illustrate various other arrangements and shapes of openings which may be formed by the use of correspondingly shaped unreticulated portions correspondingly positioned on the cylinder mold.

Figures 9,10 and 11 illustrate forms of roofing to be made. from the sheet material formed up according to Figures 6, 7 and 8 respectively. M

Referring to Figure 1, -1 indicates the vat 'of' a paper machine in which is partially submerged the cylinder molds 2 in the usual manner. Over the tops of these cylinder molds passes the blanket 3, this blanketpicking off from the cylinder molds the pulp deposited thereon and forming a multily sheet in a manner well understood in the art. The blanket as shown passes beneath rollers 5 above each cylinder mold and y shown) and the blanket returns in an endless path to again cooperate with the cylinder molds in series in a continuous operation. The linder molds are commonly formed of reticulated material so'that the water may pass from outside into these molds and drain off therefrom, leaving the pulpdeposited on the reticulated surfaces. In order that it may fail to be deposited over the complete areas of the sheet so as to ,define the cutouts between the shingle simulating tabs, rectangular unreticulated" 1 portions corresponding to the areas on which it, is not desired to deposit the pulp are formed or fixedto the outer surface of each cylinder mold, this being shown in Figures 2 and 3 at 10, the reticulatedsurface being indicated at 11. a

As shown the portions, 10 project somewhat from the periphery of each'cylinder mold soas to define sharply the edges of the cutouts, the fibrous material being deposited on the mold over the reticulated portions 11 and failingto be deposited the sub'g s n areas emanate): thei'n rt ons 10. As shown these: portions 10' are ar- ,complished by driving.

ranged spaced apart in parallel series corresponding lengthwise of the roll to 'the widths of the-shingle simulating tabs to be formed in the final product, and corresponding circumferentially of the roll to the distance between the tabs where the material is to be cut from the continuous sheet by longitudinal and cross cuts to form strip shingles as shown in Figure 4c. At the ends of the cylinder mold imperforate elements 20. each of one-half the width of the imperfw rate elements 10, but otherwise similar theremay be employed to properly forn'rthe sides of the sheet material to'define notches 22 the slots 12 formed by the elements 10 and in transverse alinement therewith. It is of course important to rotate the cylinder moldsin synchronism so as to cause the slot and notch formations from the successive molds to accurately register on the blanket. This, however, may be readily acthe cylinder molds by a common drive shaft 15 by bevel gear connections 16 to each cylinder mold. The

shaft.15 is shown as supported-in bearings 17 positioned along one side. of the vat. The sheet thus formed slots and edge notches is then saturated and otherwise finished, the, slots and the notches remaining open and substantially unobstructed throughout the further; processesof treating the web. The material having received its final treatment is then cut up' into units, which may be done by slitting the sheet len thwise to" define the endsof the strip units, the slit passing centrally through one row of slots, as shown along the line aa in Figure 4:, and being chopped 'ofi laterally of the sheet through the slots and between the slots as shown on the lines 6-5 and co, respectively. With this manner of cuttin it is evident that the adjacent shingles ace oppositely lengthwise of the Csheet, fthe:i line 0-0 defilnin the uppere es 0 a jacent o osite acin shingles; 'If it is desired th dt these shingle shall face in the same direction, this may be done by forming the slots 12 the length of 4 the individual cutouts instead of twice this length as shown in Figure 5,'and cutting the sheet crosswise at one end of each series of slots as at H, there being no intermedlate cuts correspondin to 00 'of Figure 4, and the series of s ots being spaced closer together lengthwise of the sheet.

Figure 6 illustrates sheet material formed up with rectangular openings 25 by correspondingly shaped and positioned um'etic-P ulated portions on the cylinder mold. By cut-ting along the dotted lines as at \e-e and then bending under the lower edges at the ends'of the cutouts, as shown in Figure 9, material having a double thick butt slotted through the upper thickness only may be (Figure 4) eachof half the widtlfiof with the spaced ialpplymg a igures 8 and .11 areviews somewhat similar to Figures 6 and 9, but illustrate longer slots 28 and the material folded substantially midway of the lengths of this slot to form double thick butts slotted through boththicknesses as shown in Figure 11.

Having thus disclosed certain embodinrents of this'invention it should be undermight be made thereln without departing from its spirit or scope as defined by the appended claims.

I claim:

1. The method of maln'ng roofing which comprises forming a web of fibrous sheet material having spaced openings therethrough, saturatlng the web; and cutting the saturated web into roofing units in a definite relation to said openings.

2. The method ofmaking roofing which comprises forming a web of fibrous sheet material having spaced openings therethrough, saturatlng and coating the web, and cutting the saturated and coatedweb into roofing units in a definite relation to said openm 3. T e method of making roofing which comprises forming a web 'of fibrous sheet material having spaced openings therestood that various changes and modifications through, saturating and coating the web,

e saturated, coated and surfaced web into roofing units in a definite openings.

surfacing thereto, and cutting relation to said 4. The method of making roofing which comprises depositing'fibrous material in the form of a felted webhavin spaced openings therethrough, and cutting t e web so formed into roofing units in a definiterelation to said 0 enings'.

5. e comprises depositing fibrous materia in the form of a feltedweb having spaced series of parallel slots therein, web crosswise and lengthwise of'said slots to form roofing units each hayin'sgshin'gle' ots' simulating tabs separated by sald I 6. The -method of making roofing which comprises depositin form of a felted we parallel slots therein, treatin said web with waterproofing material, and cutting said web crosswise and lengthwise-of said slots to form roofing units each having shingle sin'i ulatingltabs separated by said slots; 7. e method of making roofin which comprlses depositing fibrous ma'teriafi in the 6f making *roo fin which and cutting said.

fibrous material in the having spaced series of form of a felted web having spaced series of parallel slots therein, treatin said web with waterproofing material, app ying a surfacing to said treated web, and cutting said web crosswise and lengthwise of said slots to form roofing units each having shingle simulating tabs separated by said slots.

8. The method of making roofing which comprises depositing fibrous material in the form of a felted web having spaced openings 10 therethrough, treating said web with waterproofing material, and cutting said treated web into roofing units in definite relation to said openings; 7

In testimony whereof I have affixed my signature. v v o CHESTER E. RABBI

Images