US1682880A

US1682880A - Sole pattern

Info

Publication number: US1682880A
Application number: US120315A
Authority: US
Inventors: Roland G Anderson; Gaines John
Original assignee: Candee & Co L
Current assignee: Candee & Co L; L Candee & Co
Priority date: 1926-07-03
Filing date: 1926-07-03
Publication date: 1928-09-04
Anticipated expiration: 1945-09-04

Description

sepfn 4, 1928. 1,682,880

R. G. ANDERSON ET AL SOLE PATTERN Filed July' 3, 18.88Z

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SOLE PATTERN.

Application filed July 3,

Ilhis invention relates to sole patterns and more particularly to patterns for cutting soles of rubber or other similar sheet materials. Such patterns are used in connection u vwith sole cutting machines and are detachably mountable therein to serve as forms about which a cutting knife travels.

l-lleret-ofore blank patterns haye been formed of two or more pieces comprising the u pattern and the holding means for securing it to the cutting machine. The pattern was provided with a relatively narrow crimped knife-guiding edge and this edge was then iiled to bring the contour of the pattern to i the size desired. Not only was this process of forming the pattern slow and expensive, but when cutting an under bevelled sole 'the vknife as it rose at the completion of a cutting operation would cut through the bevelled P edge of the sole unless some means was p rovided for retracting the knife prior to its rise.

An object of this invention is to provide a pattern which can be used without any separate device for retracting the knife. Another i object is to simplify the method of making patterns by providing a pattern havin a rolled edge. Another object is to provi e a pattern for undercutt-ing formed in such a way as to eliminate the necessity of grinding the edges to obtain the desired size. btill another object is to provide a pattern having a one-piece construction. Still a further object is to provide a pattern for undercutting which will be self-stripping.

A feature of the invention is the rolled or pressed edge whereby the desiredangle for cutting with an underbevel is obtained without grinding. Another feature is the bead located on the under side in spaced relation to the edge of the pattern. Another -feature is the wide bearing edge by which a portion of the pattern can be adjusted vertically relative to the knife as the machine head and cutting instruments are raised,` while at the saine time allowing for retaining the knife in position against the pattern for a repeating operation. Still another feature is the uniform height of the patterns which renders tliem readily interchangeable without readjustment of the machine. i

Briefly the invention consists in forming a one piece pattern by pressing the same from a sheet of metal, the pattern having holding lugs pierced 'and formed from the pattern it- 1928. Serial No. 120,315.

self.. The invention consists also in forming a knife guiding surface by rolling or pressing the edge of the pattern to the angle desired for cutting. The underbevelled patterns are provided with a stock holding means consisting of a bead extending around each pattern adjacent to the knife guiding edge and spaced therefrom a distance greater than the amount which the knife projects under the pattern. Placing the bead adjacent rather than on the edge, as has been formerly done, renders the pattern also a stripping means for the cut blank for as the bead presses against the surface of the stock, it causes the cut edge to be raised and separate from the stock.

l The invention will best be understood if the following description is read in connection with the accompanying drawings in which:

Figure 1 is a plan view of the pattern. Figure 2 is a sectional view on the line 2-2 of Fig. 1.

Figure 3 is a detail sectional View on the line 3-3 of Fig. 1.

Figures. is a plan View showing a modified construction.

Figure 5 is a section on the line 5*-5 of Fig. 4.

Figure 6 is a section on the line 6--6 of Fig. 4, and

Figure 7 is a detail sectional view illustrating the self-stripping means. i

The sole pattern 1 having the bead 2 eX- tending around the pattern adjacent its edge, is provided with a wide knife bearing edge 3 which acts as a guide surface for the knife 4. This wide bearing edge of the pattern is formed by rolling the edge to the angle desired for cutting. The Wide bearing edge 3 provides a bearing surface against which the thick portion of the knife blade can contact when the knife is elevated to its extreme position relative to the pattern and makes it possible to retain the knife in position for a repetition of the cutting operation. The knife blade is tapered to a thin edge and it is desirable that the strain from the friction exerted between the blade and the pattern be borne by the thick portion of the blade to eliminate danger of breaking the blade. For this purpose the iiange 3 is made suiiiciently high around those portions of the pattern where the knife enters and leaves the sheet material to insure that the thickened portion of the blade will bear against the flange even when slight-ly, the upper edge having a pronounced curve or roll. By this provision sharp edges are eliminated which might cut or score the knife blade as it is raised or lowered relative to the pattern.

lVhen the pattern is in operable position, it presses down on the sole stock 5 with considerable Weight and the bead sinks into the sheet material momentarily.

The pattern is provided with the

holding lugs

6 and 6 by which it can be secured to a sole cutting machine. The pattern is, however, a one piece construction, the holding lugs being formed by piercing the blank and bending thel material inwardly. The bushing 7 and the rivets 8 carried by t-he lugs serve as means by which the pattern can be attached to a support. This is a distinct improvement over the former art since it eliminates the attached holding devices or so-called ribs and ques formerly used which at times became .loose and permitted the pattern to shift i use. The pattern is adapted to be supported by the rear holding bushing 7 allowing the toe end to drop under gravity and is held by externally applied spring pressure, as described in my copending application Serial No. 159,577 filed January 7, 1927. The heel portion of the pattern is permanently maintained in relatively constant position vertically with respect to the knife and consequently itis ordinarily not necessary to provide the edge of the heel with a flange. The fact that the heel is not flanged does not prevent the knife from being retained in location for a repeating operation when the machine head is lifted since in operation the knife enters the sole stock on one side of rolled toe end of the pattern and leaves it on the other side of the toe end after about one and one-third revolutions.

The bead 2 serves because of the small surface in contact with the stock to prevent the stock from adhering to the bottom of the pattern. The bead is disposed laterally of the guiding edge of the pattern a distance such that the pressure exerted by the same against the sheet material is disposed laterally of the knife blade, and consequently affords no resistance to the passage of the knife and exerts no pressure upon the severed edges. This distance can be varied depending upon the thickness of the sheet material to be cut and the distance which the knife is projected under the pattern. As the bead presses down on the surface of the blank, it tends to dent in the surface of the stock directly beneath it causing the edge of the cut blank to curl up slightly away from the stock. It is particularly contemplated to cause the bead to firmly press against the sheet material at the toe and heel portions since it is at these rtions that the sheet material is subjecte to the greatest strain from the knife which might serve to pull the material out of position.

The pattern may be, if desired, and in the case of the under cut pattern preferably is, reinforced on its upper surface by the parallel beads 9 running length wise of the pattern.

A modification of the pattern described above is used for over-bevel cutting (Figs. 4 and 5). In this case the holding lugs are pierced from the pattern and formed as before but on the opposite side of the pattern. The edge is rolled as before, but forms both the knife guiding surface and the bearing surface. In this embodiment of the invention the edge of the pattern may be filed to fit the contour of the sole.

Herctofore patterns have been non-uniform in height due to the manner in which they have been manufactured b crimping and filing the edges. A great a vantage of the atterns formed in the manner disclosed herein is that due to the rolled edge construetion and the elimination of the separately at tached holding devices, theyare uniform in height and are therefore especially adapted for use in automatic machinery. The onepiece rolled edge construction of these patterns also greatly reduces the time and expense heretofore required for their manufacture by the methods formerly in use.

The invention is of advantage in cutting under-bevelled blanks of a uniform outside size in which the angle of the bevel may be varied. In using the cut blank, it is applied to a shoe with the upper surface as viewed in Fig. 2 functioning as the outside or bottom of the sole. The thinned portion of the ed e of the sole is then folded up over the outside of the shoe upper and forms an even edge of uniform height regardless of the angle of the bevel. In cutting the blank the space left between the body portion of the pattern and the sheet material as the bead presses into the latter, -is very slight and the angle at which the knife cuts, can be varied considerably without changing the outside size of the sole.

Having thus described my invention, what I claim and desire to protect by Letters Patent is:

1. A sole pattern, the knife guiding edge of which is under-bevelled to the desired angle for cutting.

2. A so e pattern having a bevelled knife guiding edge and a bead upon its under surface projecting from the pattern adjacent to the edge but slightly removed therefrom.

3. A sole pattern having a flan ed knife. guidinI edge extending laterally t erefrom partially around said pattern and a bead located in spaced relation to the edge of the pattern.

4. A one-piece sole pattern having integral lugs for connection to a sole cutting machine, said lugs comprising parallel ears bent up from the body of the pattern and a rigid connection between the ears adjacent their tops.

5. A sole pattern forvunder-bevel cutting having an underbevelled knife-guiding edge and a bearing surface consisting of a bead extending partially at least around the pattern adjacent the edge in spaced relation thereto.

6. A sole pattern comprising a body portion having an angularly directed peripheral flange, the free edge of the flange being convexly curved.

7. A sole pattern having holding lugs formed integrally therewith, a flanged edge slightly curved at its extremity, and a bead extending around the pattern and somewhat removed from the edge.

Signed at New Haven, county of New Haven, and State of Connecticut, this 20th day of May, 1926.

ROLAND G. ANDERSON.

Signed at Woonsocket, county of Provi dence,v and State of Rhode Island,' this 24 day of' May, 1926.

JOHN GAINES.