US1856433A - One piece cutter - Google Patents

Description

May 3, 1932- L. c. SCHILLO ONE-PIECE CUTTER 2 Sheets-Shed Filed Nov. 20, 1929 fizflen #07 1701126 6. ficizz'llo,

y 1932- L. c SCHILLO ONE-PIECE CUTTER Filed Nov. 20, 1929 2 Sheets-Sheet 2 E2 z e 72 107'2' A ZOzLZLiF 65ChZlZ0,

Patented May 3, 1932 UNITED STATES PATENT OFFICE LOUIS G. SCI-IILLO, OF CHICAGO, ILLINOIS, ASSIGNO R, 'BY MESNE ASSIGNMENTS, 'I'O ASPHALT PROCESS CORPORATION, .NEW YORK, N. Y., A CORPORATION OF NEW .masnv ONE PIECE- CUTTER Application filed November 20, 1929. Serial No. 408,460.

' This invention relates to improvements in a knife :for cutting flexible roofing-or shingle strips, slabs an'dthe like, and refers more particularly to a knife of one-piece construction adapted to cut roofing elements from a sheet of flexible fibrous roofing material in such a manner that a more desirably cut shingle is produced than shingles cut by a multi-piece knife.

In the-cutting of strip shingles the material to be out usually comes in a roll of, say thirtysix inches in width. The roll is rotatably mounted upon bearings or .mandrels, and the material, as unrolled, is passed to a. cutter roll which comprises a plurality of coaxially mounted filler plates uponthe peripheral'surface of each of which isdisposed a pair of three-piece cutting'blades. To cut, for example, a four-tab shingle strip, five filler plates may be provided, the three intermediate .platessuporting U-shaped blades adapted to cut equally spaced .U-s'ha'ped slits in the roofing material. The :two end filler plates support end cutters which are adapted to out half U slits ateach end of the material. The sheet materialthus slittediszpassed to a transverse cutter which severs the sheet transversely across the top of each of the U-shaped slits. Thus, a shingle unit is formed having a series of apertures which divide the lower edge of the unit into four tabs, resembling shingles.

The mounting of these aforementioned cutter or U slitter blades has been a source of much trouble to the industry, and it is to this feature that my invention is particularly directed.

The U-sha-ped cutter blades have heretofore been constructed in three pieces, the two longitudinal portions of the U, and the lower cross piece. It is obvious that this construction necessitated the separate mounting of each ofthe elements constituting'the compound cutter blade. To do this properly is a ditficult task involving much time'and labor, and in addition, it has been foundthat at the point of juncture of the twolongitudt nal' blades and the cross blade the slit would not always be cut cleanly. This disadvantageous feature resulted in 1a shingle strip which was imperfectly cut and necessitated additional handling of the strip to completely separate the waste portions defined by the U blades, and in addition, a strip is formed which, due to the imperfect cutting, is materially weakened at the corners of the cutout space between the tabs thereby making the strip susceptible to tearing.

One of the important objects of my inventlon resides in the provision of a one-piece blade which can be quickly and easily mounted upon a cutter roll, all adjustments and alignments being made in a fraction of the time necessary for the adjustment of the old three-piece blade. In addition, a clean cut is made which results in a shingle strip of much greater strength.

Another important feature of the present invention consists in the provision of a novel filler plate of such construction that a firmer foundation for the cutter blade is provicled.

An additional feature of my invention resides in the disposition of the end cutters. The cutting edges of the three intermediate full U cutters are beveled inwardly toward the axis of the .U. I have found that if the end half U cutters are beveled in the same manner the end material is forced inwardly toward the center of the strip and a perfectly cut half U incision cannot be made. To obviate this diificulty, the end cutters are beveled in the opposite direction to the central cutters, that is, the bevel slopes outwardly from the axis of the half U. By this arrangement the lateral force exerted by the beveled blades upon the roofing material acts outwardly from the center of the material and a more desirable end-cut is effected.

Other and further important objects of the invention will be apparent from the ac colnpanying drawings and following detail description.

In the drawings, Fig. 1 is a side elevational view of a cutting .blade'in operative position.

.FigJQistan and elevation of one of the cutting heads, parts being broken away.

Fig. 3 is a'sectional view, illustrating a cutting head supporting the one-piece blades inoperative position.

Fig. 4 is a'detail perspective view, of one of the one-piece blades.

Fig. 5'is a sectional end elevation of an end or side cutting head, supporting an end or side one-piece cutting blade.

Fig. 6 is a detailperspective view of one'of the end or side one-piece cutting blades.

Fig. 7 is a fragmentary view of a-portion-- of a stripshinglecut by means of my invention.

Referring to the drawings in'det'aiL 1 indicates a portion of abed roll upon which the strip shingles are adapted to be cut. The

roll 1 may be constructed of chilled steel, or

if desired may comprise a cast iron core sur rounded by a removable chilled steel sleeve or sleeves. In the latter'case when the surfaces of the sleeves are worn the sleeves may be removed and replaced. The roll 1 may be rotatably mounted and may be provided with bearings (not shown) adjustable toward or away from a coacting cutting roll hereinafter more fully described.

Y The cutting roll or cutting-units may be mounted upon a shaft 2 which may be rotatably mounted upon adjustable bearings (notshown). The cutting units may take theform of acomposite cutting head 8, which may. comprise a retaining collar 4, a filler plate 5 and a face plate6. The entire assembled cutting unit 3 may be keyed or otherwise suitably mounted rigidly upon the shaft 2, being adapted to turn therewith. The retaining collar 4, filler plate 5 and face plate 6 may be provided with a pluralityof registering apertures 7,2to receive a plurality of screws or bolts 8. The apertures? in the, retaining collar'45may be internally'threaded toengage with the threads of the screws, 8. The screws 8 may be loosely positioned through the apertures provided in the filler plate 5 and face plate 6. 7 Thus, it can be readily seen that upontightening the screws 8 the collar 4, the filler plate 5 and the face plate6 are drawn together into one unitary structure. r

The filler plate 5 may comprise a disc-like element having integral offset shoulders. 9 andprovidedwith a transverse slot 10 in the peripheral edge of the plate5.

A one-piece blade or knife 11 being arcuate in shape and provided with transverse apertures 12 is adapted to bemounted on filler plate 5, the lower arcua-te .edgesyof the and the one-piece knife 11, the mounting of the knife upon the head 3 is a relatively simple task and in addition the provision of the 7 may be provided in the finished strip shin-' gle 17. This can be accomplished by rounding the cutting edges of the knife 11, as shown at 18 in Fig. 4; vIt can bereadily seen that this feature" is entirely absent in the use of multi-piece knives, with the result that the corners of the apertures cut thereby are imperfect and aresusceptible to tearing.

In the construction of the usual shingle stiipsl7 v:end or sideapertures 19 may be provided. which may take the form of a half aperture 20.; In this manner, when the strips are laid end to, end, thetwosymmetrical end apertures 19 of thestrip 17 provide 'a full aperture 20. Thus, a roof constructed with this type ofshingle strip presents a" pleasing uniformappearance. V I

In order to cut the end half apertures 19 a head v may be provided, comprising aretaining collar 4, a faceplate 6 and aifiller plate 5". The collar a l and face plate 6- are substantially similar tothe collar 4 and face plate 6, but the filler plate is. provided with but a single shoulder 9 instead of thedouble shoulder 9 as formed upon the'fill'er plate 5. An arcuate L-shaped :cutter blade 1'1 is adapted to be mountedsupon the filler-plate 5 in a manner tobe hereinafter more fully described. A series of registering apertures may be provided in the collar 1, face plate 6 and filler plate 5. into which screws 8 are adapted to engage similar to the construction of the head 3. An aperture 12 may be pro vided in the knife 11 and, as is obvious, the

blade 11.. may be securely clamped between the face plate 6 and filler plate 5 by means of the screws 8. A transverse slot 10' may be provided in the edge of the filler plate 5 into which the. end 13 of the blade 11 may be disposed, being retained therein'by means of a set screw 14 In this manner theblade 11 may: be readily and securely ,mounted upon the head 21. y Y I 'In the formation of the usual strip shingle 17 having, for instance, four tabs '22, three fully equipped heads 3 may be mounted on shaft 2 in sucha manner as to produce three equally spaced apertures 20; A cutting head may be mounted at each end'oflthe shaft 2 and may form a half aperture 19. at each end of theistrip 17. It is to'be .understood, of course,"that a shingle strip of more or less than four tabs 22 may be provided as desired merely by adding more or less heads 3. V

' 3 I have found that, in cutting the end apertures, if the cutting edges of the end knives are beveled in one direction, for instance, if the beveled 'side ofthe knife is disposed 150- Ward the transverse centerof the strip 17 ,a

7 which tends to force the end of the strip toof any shape aperture.

ward the center and an imperfectly cut aperture 19 results.

Accordingly, one of the features of my invention resides in the disposition of the beveled edge of the knife 11' on the outer side of the strip 17 that is, the fiat edge of the blade 11 faces the transverse center of the strip. When disposed in this manner the thrust exerted by the beveled edge acts outwardly from the transverse center of the strip and results in a perfectly cut end aperture.

Although a U-shaped aperture is herein shown and described, it is to be understood that my invention contemplates the cutting I am also aware that many other modifications in form and structure may be devised without departing from the spirit of my invention, and hence I do not wish to be limited except as necessitated by the prior art.

It is apparent that I have provided a onepiece cutting blade and a means for mounting the same, which eliminates the tedious and time consuming operation of mounting and adjusting multi-piece blades used for the same purpose, and in addition, a better and more substantial product is produced. Further, the first cost and maintenance cost of a structure of this character is insignificant in comparison to the expensive cutters utilizing multi-piece blades.

I claim as my invention: 7

1. A cutting head including in combination, a filler plate, a substantially U shaped one-piece cutter blade removably mounted on the filler plate, means for uniting the filler plate and cutter blade in a unitary structure, said filler plate comprising an annular disk and an arcuate shoulder formed on a face of said disc, the edge of the disc being provided with a transverse slot for the reception of the bight of the cutter blade.

2. A cutting head including in combination, a filler plate, a one-piece cutter blade removably mounted on the filler plate, and means for uniting the filler plate and cutter blade in a unitary structure, said filler plate comprising an annular disc and an arcuate shoulder formed on each face of said disc, the edge of the disc being provided with a transverse slot for the reception of a portion of the cutter blade.

3. A cutting head including in combination, a filler plate, a substantially U shaped one-piece cutter blade removably mounted on the filler plate, and means for uniting the filler plate and cutter blade in a unitary structure, said filler plate comprising an annular disc and an arcuate shoulder formed on each face of said disc, the edge of the disc being provided with a plurality of transverse slots for the reception of the bights of the cutter blades.

4. In combination, an annular disc, an arcuate shoulder formed on each face of said disc, the periphery of said disc being provided with a transverse slot, a one-piece cutter blade having an angularly bent portion removably mounted on the disc, the base of the cutter blade being arcuate in shape and adapted to be positioned on said shoulders, the angularly bent portion of the cutter blade being positioned in said transverse slot.

5. In combination, a one-piece cutter blade, arcuate in shape in one plane and U-shaped in a plane at substantially right angles to the first plane, a filler plate comprising an annular disc provided with a slot in an edge thereof, an arcuate shoulder formed on a face of said disc, said one-piece cutter blade being adapted to be mounted 011 the filler plate, the cross portion of the U-shaped blade being disposed in said transverse slot and the arcuately shaped portion of the blade being adapted to register with and be positioned on the annular shoulder, and means for uniting the filler plate and cutter blade in a unitary structure.

6. Means for cutting an end or side slot in a moving sheet, comprising a cutting head mounted on a shaft, and an L shaped blade mounted on said head, the cutting edges of the blade being beveled outwardly toward the longitudinal edge of the moving sheet.

In testimony whereof I aflix 1n signature.

LOUIS G. S HILLO.

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