US 1961896 A
Description (OCR text may contain errors)
June 5, 1934. A, BARRALL 1,961,896
APPARATUS FOR CUTTING ROOFING ELEMENTS Filed. July 9, 1.932 s Sheets-Sheef 1 m I Q m INVENTOR. Hri'hur L. Ear/all A TTORNEY June 5, 1934.
A.L.BARRALL APPARATUS FOR CUTTING ROOFING ELEMENTS Filed July 9, 1932 3 Sheets-Sheet 2 June 1934. A. 1.. BARRALL APPARATUS FOR CUTTING ROOFING ELEMENTS Filed July 9, 1932 3 Sheets-Sheet 3 INVENTOR.
Patented June 5, 1934 PATENT. [OFFICE APPARATUS FOR' CUTTING ROOFING ELEMENTS Arthur L. Barrall, Carlstadt, N. J., assignor to The Patent and Licensing Corporation, Boston, a corporation of Massachusetts Application July 9, 1932, Serial No. 621,588 -2 Claims. (01. 164-28) This invention relates to apparatus for cutting sheet material into roofing elements and is more particularly concerned with apparatus designed to cut roofing elements from a sheet of prepared 5 roofing comprising fibrous felt, saturated and coated with asphalt and surfaced with mineral granules such as crushed slate or the like.
In the manufacture of roofing elements from sheet material of the character described, wherein cut-out sections or portions of the sheet are removed in order to form elements of various designs, the portions so removed frequently stick between the blades owing to the adhesive nature of the asphalt coating at the temperature normally prevailing at the cutting stage of the operation. It has been proposed to remove the portions which are retained between the blades, by mounting the cutting blades on a cylinder having openings or ducts from the center of the drum to the surface thereof so that the cut-out portions may pass through the ducts into the center of the drum and be removed therefrom by means of a screw or other conveying means. In this type of cutting cylinder the outer ends of the ducts conform in size and shape to the portions removed from the sheet and consequently these portions become stuck frequently in the passageways and these ducts soon become clogged or jammed.
Succeeding cut-outs can then no longer pass sheet becomes injured and the machine must be stopped in order to clean out the ducts. Frequently, also, the lack of positive ejection of the cut-out portions from between the blades results in the cut-out falling out from between the blades onto the sheet of roofing material causingit to become marred on its surface during its subsequent passage through the remaining portion of the apparatus.
The object of my invention is to provide a cutting mechanism for the purpose described, having means for positively ejecting the cut-out portions from between the cutting blades. This object is accomplished by the-provision of means including a plunger so arranged and operated that the cutout portions caught between the blades will be pushed outwardly clear of the blades by a plate fastened to the outer end of the plunger, the inner end of which contacts with a cam in the interval of time between successive contacts of the cutting blades and the sheet to be cut.
By this mechanism, which will be more fully hereinafter described, I am able to avoid the difiiculties above referred to, since each cut-out is 65 ejected outwardly immediately after it is cut from through the passageway, with the result that the,
the sheet by the cutting blades and before the blades perform a succeeding cutting operation.
In order more fully to comprehend my invention, reference may be had to the following detailed description in conjunction with the accompanying drawings of which,
Figure 1 is a front elevational view of a cutting device embodying my invention;
Figure 2 is an enlarged elevational view of one end of the cutting drum, partly in cross-section, showing the ejecting mechanism;
Figure 3 is an elevational view similar to Fig.- ure 2;
Figure 4 is a cross-sectional view taken on the line 44 of Figure 2;
Figure 5 is a cross-sectional view taken on the line 5-5 of Figure 2;
Figures 6 and 7 are enlarged perspective views of the ejector plates; 7
Figure 8 is an enlarged end view of the cam ad- 7 justing mechanism;
Figure 9 is a plan view of a portion of the sheet material illustrating one form of shingle that may be cut by the cylinder shown in Figure l and embodying my invention.
Figure 10 is a plan view of an individual ele-, ment as formed by the cutting drum shown in Figure 1.
Referring to the drawings, whereinI have shown my invention embodied in mechanism for cutting 5 shingles of the form illustrated in Figure 10, the numeral 1 indicates a cylinder upon which arcuate blades 2, and the straight blades 3, are mounted, the former extending peripherally at spaced intervals along the cylinder, and the latter extending axially thereof. The arcuate blades 2 are spaced axially on the periphery of the cylinder at intervals corresponding to the width of the shingle elements desired, and the blades 3 are placed diametrically opposite one another on the periphery of they cylinder. A plurality of spaced pairs of blades 4 and 5 are mounted on the cylinder, one end of the blades of each pair being contiguous with the blade 3 and the opposite ends of each pair of blades 4 and 5 being joined by the short axially extending blades 6. The blades 4, 5 and 6 together with portions of the blades 3 thus define areas 7 which conform to the design of the waste portions which must be removed from the sheet in the cutting of the shingles therefrom. 106 Near each end of the roll are blades 8 and 9 which. together with portions of the blades 2 and 3, define areas 10 which are one-half the size of the areas 7 and conform to the design of the portions to be removed along the edges of the sheet. 110
screw 22 may pass in order to fasten the plate to The blades are held in place on the surface of the cylinder by means of the segments 11 which may be fastened to the cylinder by means of screws 12.
As arranged, the knives are adapted to cut five shingles of the form shown in Figure 10, transversely of the sheet,'and two shingles longitudi nally of thesheet at each revolution of the drum. It will be apparent that the cylinder may be lengthened or shortened and the blades arranged in various positions, and also that the diameter of the cylinder may be increased or decreased anda correspondingly larger or smaller number of blades mounted thereon so that a greater or smaller number of these elements or elements of other configuration may be cut during each revolution of the drum.
The cylinder 1 is rigidly mounted on the hollow shaft 12' which is adapted to revolve in suitable bearings set in the housings 13 and 14. A second shaft 15 is mounted concentrically within the shaft 12' and is adapted to remain normally stationary but may be moved through a small arc by means of mechanism to be described hereinafter.
Within the areas 7 defined by the blades 4, 5, 6 and portions of the blades 3, and the areas 10 defined by the blades 3 and 9 and portions of the blades 2 and 3 are the ejector plates 20 and 21, having arcuate shaped surfaces conforming to the periphery of the cylinder. The plates are slightly smaller than the areas defined by the blades in order to provide suificient clearance for movement of the plates as will presently be described. Each plate has an, opening approximately in the center thereof through which a the end of a plunger 23 and the opening is so formed that the head of the screw may be counter-sunk. Suitable gaskets 24. of rubber or other equivalent material are held against the bottom surface of each ejector plate by means of screws 25 so as to form cushions between the ejector plates and the stop plates 26 which, in turn, are held fast to the cylinder 1 by means of screws 27. The shaft 12' and the cylinder 1 are bored radially at diametrically opposite points along the length thereof in order to form passageways from countersunk oil cups 44 are formed in the segthe surface of the cylinder to the hollow interior of the shaft, in radial alignment with the areas '7 and 10. The bores through the cylinder 1 are threaded at 29 to receive bushings 30 through which the plungers 23 pass, there being suificient clearance to permit reciprocating movement of the plungers.
The inner ends of the plungers are formed with bifurcated arms 31,- 32 each having a circular opening 33 therein. A pin 34 upon which is mounted a roller 35 passes through the openings 33 and is retained in place by the walls of the passageway.
[A coil spring 35' encircles that portion of each plunger between the bushing 30 and the bifurments 11 in registry with ducts 45 leading to the spaces between each pair of collars 42.
At one end of the shaft 15 is mounted an adjusting lever 50 fixed to the shaft by means of key 51. An end plate 52 having an arcuate slot 53 in the upper portion thereof is attached to the end of the housing 14 by means of bolts 54. The outer end of the lever 50 has an opening in registry with the slot 53 through which a bolt 55 passes. The
bolt may be tightened by means of nut 56 in order to hold the outer end of the lever in fixed posi- 'tion at any point along the arcuate slot 53.
Describing the operation of the mechanism,
as the sheet of roofing material passes between the cutting drum and the anvil roll thereabove,
it is slit along the lines 60 by the blades 2 and transversely severed along the lines 61 by the blades 3. The portions 62 are removed from the sheet by means of the blades 4, 5, 6, together with the blades 3 and-the portions 63 are removed by means of the blades Sand 9 together with portions of the blades 2 and 3. The portions 62 and 63 will be confined in the enclosed area between the blades until the drum revolves to such a position that the rollers 33 contact with the cams e0 fixed to the stationary shaft 15. The cam surfaces acting on the rollers cause the plungers to move radially outward so that the ejector plates force the cut-out portions, which are held between the knife blades, clear of the blades, allowing them to fall to the floor or into a receptacle placed under the cutting drum to receive them. The cams are preferably set in such position that the plungers will be pushed outwardly to eject the cut-outs when the ejector plates are substantially in their lowermost position of rotation.
As the drum continues to rotate and the rollers pass beyond the cam surfaces, the coil springs 35 cause the plungers to resume their normal position, so that by the time each set of blades reaches the position where they make next contact with the sheet to be cut, the ejector plate is in the normal or set position.
By adjusting the position of the lever 50, the shaft 15 can be rotated through an arc corresponding to the arcuate slot 53 and the cams 40 thereby adjusted so as to act on the rollers 33 at any suitable point after the blades have contacted with the sheet and have removed the cutout sections therefrom.
The particular form of shingle shown in the drawings and the arrangement of the cutting knives particularly described are purely illustra tive, for manifestly the mechanism forming the subject matter of my invention may be adapted for cutting shingles of various designs simply by arranging the knives in proper relation to each other and shaping the ejector plates to conform to the shape of the cut-outs or other portions which are to be removed from the. sheet in the production of the desired shingle.
I claim as my invention:
1. In apparatus for cutting roofing elements from a sheet of asphaltic roofing material, a cylinder, knives mounted on said cylinder to sever successive shingle elements from the sheet a plurality of series of cutting blades mounted on said cylinder, said series being spaced from one another axially of the cylinder, each of said series of blades being arranged to cut a waste piece from said sheet conjointly with the severance of the shingle elements from the sheet by said first named knives, and means for ejecting the waste pieces from between the blades of each series, said means comprising radial passageways extending from the surface of the cylinder to the interior thereof and in alignment with each of said series of blades, a reciprocable plunger mounted in each of said passageways, a fixed shaft concentric with said cylinder, said shaft having cam surfaces thereon adapted upon rotation of said cylinder. to force said plungers outwardly of the surface of the cylinder, whereby to eject the waste pieces lodged between each of said series of blades. l i
2. In apparatus for cutting roofing elements from a sheetof asphaltic roofing material. a cylinder. a plurality of series of cutting blades mounted on said cylinder. said series being spaced from one another axially of the cylinder. each of said series of blades being arranged to cut a waste piece from said sheet, and means for ejecting the waste pieces from between the blades of each series, said means comprising radial pas sageways extending from the surface of the cylinder to the interior thereof and in alignment with each of said series of blades. a reciprocable plunger mounted in each of said passageways, a fixed shaft concentric with said cylinder, said shaft having camsurfaces thereon adapted upon rotation of said cylinder, to force said plungers outwardly of the surface of the cylinder, whereby to eject the waste pieces lodged between each of said series of blades, and means for adjusting the position of said shaft whereby to vary the point of action of said cam surfaces upon said plunger-s.
THUR L. BARRALL.