US2249779A - Machine for bending sole margins - Google Patents

Description

-July22,1941. I E. S.INOKIES 2,249,779

MACHINE FOR BENDING SOLE MARGINS Filed March 1, 1940 Patented July 22, 1941 UNITED STATE MACHINE FOR BENDING SOLE MARGINS Ernest S. Nokes, Swampscott,,Mass., assignor to United Shoe Machinery Corporation, Borough of- Flemington, N. 1., a corporation of New Jersey Application March 1, 1940, Serial No. 321,626

6 Claims. J (01. 12 -22) This invention relates to machines for bending sole margins and is herein illustrated as embodied in a machine for transversely curving the marginal portion of an unattached outsole' so that it will conform closely to the bottom of a lasted shoe and will not tend to pull away from the overlasted upper of the shoe after it has been cement attached thereto. Apparatus for performing a similar operation is disclosed and claimed in United States Letters Patent No. 2,209,405, granted July 30, 1940, upon an application filed in the name of William P. Le Bette, and the present invention may be regarded as an improvement thereon.

It is an object of the present invention to improve the smoothness and regularity of curvature of the marginal surface'formed upon the tread face of the sole and to avoid the production of any visible line or mark at the junction of the flat and curved portions of said surface. To this end the extreme edge portion of the sole margin is gripped between the large ends of the two tapered rolls while the sole is engaged inward from its edge by a feed wheel about which the body of the sole is bent upward relatively to the margin by being caused to pass over a support which holds up the body of the sole at an angle to its margin as the sole is fed along by the feed wheel and the tapered rolls between which its edge portion is gripped." The arrangement of the rolls, feed wheel and support is such that the outer face of the sole is in the air at the place where the bending occurs; permitting the formation of a smooth curve and eliminating any possibilty of marking or marring said outer face.

In addition to the usual edge gage for guiding the sole, there is provided a second edge gage so positioned in the path of the sole edge after the sole has left the rolls and feed wheel as to cause the sole to be guided practically automatic-ally along all except the sharpest curves, such as that at the tip of a pointed toe.

These and other features of the invention will be better understood and appreciated from reading the following detailed description of an embodiment thereof in connection with the accompanying drawing, in which Fig. 1 is a view in side elevation of a sole margin bending mechanism embodying the invention;

Fig. 2 is a view of the same mechanism in front elevation;

Fig. 3 is a plan view showing a detail of the mounting of the sole supporting member; and

Figs. 4 and 5 are fragmentary views in plan and side elevation, respectively, illustrating one position of the sole while it is being operated upon.

Referring now to the drawing, lll'indicates a portion of a stationary machine frame or housing by which the movable parts of the mechanism are supported. Bolted to the housing I0 is a bearing bracket l2 in which is journaled a shaft l4. To the outer, or forward, end of the shaft I4 is afiixed a toothed feed wheel l6 and immediately adjacent thereto a tapered hold-down roll 18 is keyed to the shaft by a pin 20. The rear end of the shaft carries a gear 22 with which meshes a gear 24 driven continuously from any suitable source of power.

Also afiixed'to the shaft I4 is a gear 26 which meshes with a similar gear 28 upon a shaft 30 journaledin a bearing member 32 mounted for swinging movement in a vertical plane about a pivotal axis which conicides with the pitch line of the meshed gears 26, 28. The rear end of the member 32 is'connected by a treadle rod 34 to a treadle- (not shown) by'which the said member can be raised and lowered at will by the operator.

Aflixed to the forward end of the shaft 30 is a tapered supporting roll 36, the large end of which is in register with the large end of the tapered hold-down roll [8. The roll 36 is, however, considerably longer than the roll l8 so that the feed wheel [6 overlies the supporting roll. As illustrated. the diameter of the feed wheel I6 is about the 'sameas the diameter of the large end of the hold-down roll l8 and the result of this is that, when the supporting roll 36 is raised to grip the extreme edge portion of the margin of a sole S,

as shown in Fig. 5, and the sole is held up in contact with the feed wheel, the sole does not touch the supporting roll 36 directly beneath the feed wheel.

The body portion of the sole S is held up at an angle to its margin by a support comprising a roll 38 mounted to rotate freely in a holder 40 a stem portion of which passes through a slot 42 in a supporting arm 44 and is threaded to receive a clamping nut 46 by which the holder can be secured in any desired adjusted position along the slot. The rear end of the arm 44 is pivoted, by a pin 48, to a lug 50 projecting downward from the member 32 and the arm is supported by a spring 52 the tension of which may be regulated by a screw 54 threaded into a tapped hole in the member 32. An adjustable stop screw 58 threaded through'the arm 44 strikes the under side of the member 32 and determines the upper limit of movement of the arm 44 relative thereto.

Adjustably secured upon the bearing member 32 by means of a screw 58 passing through a slot 60 therein is an edge gage 62 which is arranged to engage the edge of the sole and position it between the rolls l8 and 36, as shown in Figs. 4 and 5.

A second edge gage 64 is secured to the side of the bearing member 32 by a screw 66 and is so positioned in the path of the edge of the sole S being advanced by the feed wheel that, by the cooperation of the two edge gages with the rolls I8, 36 and the feed wheel I6, the sole will be fed and guided practically automatically along all except the sharpest curved portions of its edge. This automatic feeding is aided by the fact that the action of the rolls and feed wheel upon the sole is applied in a direction diagonal to a line joining the sole engaging faces of the two gages and tends to hold the sole edge against both gages except when the sole is being fed around a curve of very short radius, such for example, as that at the tip of a pointed toe, where some aid by the operator may be required in order to turn the curve accurately. H

As shown at 68the gage 64 is chamfered off to permit it to approach very close to the roll 18;

The brush 10, illustrated in Fig. 1, is the same as the brush shown in the Le Bette patent previously referred to and is for the purposeof ap-' plying an activator or solvent to a previously cemented band 12 upon the margin of the sole.

In operation, a sole is started against the first edge gage 62 and the treadle rod 34 depressed, causing the extreme edge portion of the sole margin to be gripped between the continuously rotating rolls l8 and 36. The body portion of the sole is bent up around the lower edge of the feed wheel [6 until it rests upon the support 38. As the sole is fed along by the rolls I8, 36 and the feed wheel l6, its marginal portion is progressively bent into approximately the curved form shown in Fig. 5, no visible mark or line appearing on the lower, or grain, face of the solebecause that face is not engaged by any supporting member at or near the point where the sole is bent around the edge of the feed wheel. face of the marginal portion of the sole is formed to a smooth regular curve although there may be a slight visible break in the flesh face of the sole where it engages the feed wheel Hi; this, however, is unobjectionable and may even be desirable for reasons explained at length in the said Le Rette patent.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is 1. A machine for bending sole margins comprising, in combination, a sole supporting roll, a

The outer hold-down roll, an edge gage arranged to position the extreme edge portion of a sole between said rolls, a feed wheel arranged to engage the sole inward from said rolls, and a second edge gage positioned to be engaged by the edge of the sole after the sole has left said rolls.

2. A machine for bending sole margins comprising, in combination, a so e supporting roll, a hold-down roll, an edge gage for positioning the edge of a sole between said rolls, a feed wheel arranged to engage one face of the sole inward from its edge, and a support on the opposite side of the sole for bending up the body of the sole toward the feed wheel at an angle to the sole margin.

3. A machine for bending sole margins comprising, in combination, a sole supporting roll, a hold-down roll, an edge gage for positioning the edge of a sole between said rolls, a feed wheel arranged to engage the sole inward from its edge, a second edge gage positioned tobe engaged by the edge. of the sole after the sole has left said rolls, and a support for holding up the body of the sole at an angle to its margin while the sole is under control of the feed wheel.

4. A machinefo'r bending sole margins comprising, in combination, a tapered sole supporting roll, a first edge gage adjacent to the large end of said roll, a hold-down roll in register with the large end portion of the supporting roll adjacent to said gage, 'a feed wheel coaxial with the hold-down roll and spaced therefrom toward the small end of the supporting roll, and a second edge gage positioned in-the path of the edge of a sole which is being advanced by the feed wheel.

5. A machine for bending sole margins comprising, in combination, a tapered sole supporting roll, an edge gage adjacent to the large end of said ,roll, a tapered hold-down roll with its large end portion in register with the large end portion of the supporting roll, a toothed feed wheel coaxial with the hold-down roll adjacent to the small end thereof, and a support for holding up the body of a sole, away from the supporting roll, against the feed wheel.

6. A machinelfor bending sole margins comprising, in combination, upper and lower tapered rolls arranged to engage and grip only the ex treme edge portion of a sole margin, a feed wheel positioned to engage one face of the sole inward from its edge, and a support on theopposite side of the sole for bending up the body of the sole, toward the feed wheel, at an angle to the sole margin, said support being disposed inward of the sole; from the point where the sole is engaged by the feed wheel. r 1

ERNEST s. Norms.

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