US3063073A

US3063073A - Roughing machine

Info

Publication number: US3063073A
Application number: US76598A
Authority: US
Inventors: Walter W Prue
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-12-19
Filing date: 1960-12-19
Publication date: 1962-11-13
Anticipated expiration: 1979-11-13

Description

Nov. 13, 1962 w. w. PRUE 3,063,073

ROUGHING MACHINE Filed Dec. 19, 1960 INVEN TOR.

fy' mam filihcuy United States Patent cc 3,063,073 ROUGHING MACHINE Waiter W. Prue, 331 Minot Ave., Auburn, Maine Filed Dec. 19, 1960, Ser. No. 76,598 1 Claim. (Cl. 12-17) This invention relates to a machine for use in the manufacture of shoes, and more especially to a roughing machine of the kind shown in my Patent No. 2,840,835.

In the foregoing patent, there is shown a machine for roughing the marginal edge of a covering material applied to one side of a bottom element, for example an insole or platform, so that when the margin is folded over onto the opposite side for attachment of an outsole thereto, the surface will afford good anchorage for the adhesive. The aforesaid machine has a support in the form of a disc against the peripheral edge of which an edge of the backing is held and a diametrical surface upon which the marginal edge of the covering rests while the backing is being moved relative to the support. The diametrical surface of the support contains a shallow annular groove which is transversely concave and an abrading element is arranged adjacent thereto, so that a portion of it is concentric with the curvature of the groove and has contact with the marginal edge of the covering resting across the groove. There is means for moving the abrading element in a direction toward the center of the diametrical surface to exert a stress on the margin which tends to pull the margin inwardly between the concentric portions of the abrading element and the support. The annular groove provides a very satisfactory structure for roughing insoles and the like where the contour of the edge is alternately convex and concave and Where the curvature is of relatively long radius.

This invention has for its object to provide an apparatus of the foregoing kind with an improved support adapted particularly for roughing the marginal edges of coverings applied to heels, wherein the radius of curvature is relatively short and always convex, and comprises, as herein shown, providing a supporting disc, the diametrical surface of which is characterized in that it has a concave recess, the center of which coincides with the axis of rotation of the disc, as distinguished from the annular groove of the aforesaid patent. The apparatus is further characterized in that the disc is supported on a horizontal axis for rotation about its axis. The abrading wheel is mounted on a horizontal axis at right angles to the axis of the disc, and the center of the abrading wheel is at the center of curvature of the concave recess in the supporting disc.

The invention will now be described in greater detail with reference to the accompanying drawings wherein:

FIG. 1 is a fragmentary vertical section to large scale showing the supporting disc, a portion of the abrading wheel and a portion of the work with the margin of the cover situated between the disc and the abrading wheel;

PEG. 2 is an elevation taken from the left-hand side of FIG. 1, with the abrading wheel omitted, showing the position of the disc with reference to the projecting margin of a heel;

FIG. 3 is a fragmentary section of the work after abrading, showing removal of the coating on a coated fabric; and

FIG. 4 is a fragmentary section similar to FIG. 3, showing the covering folded over onto the underside of the backing.

Referring to the drawings, there is a work support in the form of a rigid disc 12, fixed to one end of a shaft 14, for rotation about a horizontal axis. Rotation of the disc is effected by a beveled gear 16 formed integral with 3,063,073 Patented Nov. 13, 1962 its rear side which meshes with a beveled gear 18 fastened to the upper end of a shaft 20.

The forward diametrical surface 22 of the disc 12 is concave and the peripheral surface has a radially projecting shoulder 24. The shoulder is herein shown integral with the disc, however, it may be in the form of a ring fastened to the disc, for example, by a setscrew. The abrading wheel, herein shown at 26, is a wire brush mounted for rotation on a horizontal axis at right angles to the axis of the shaft 14, the center of which coincides with the center of curvature of the concave surface 22 of the disc 10 so that the peripheral surface 27 of the brush and the concave surface 22 are concentric and so that the peripheral surface of the brush travels close to the concave surface of the disc.

A heel block 28, such as shown in FIG. 2, with a flexible covering 30 applied to its side, with its margin projecting beyond the top and bottom surfaces, is presented to the apparatus as shown in FIGS. 1 and 2, in such fashion that the projecting margin m extends downwardly from the upper side of the disc 12 between its concave surface 22 and the convex surface 27 of the abrading wheel. The abrading wheel 26 is driven in a clockwise direction as shown in FIG. 1 so that it applies a force to the margin which tends to pull it down between the disc and the brush and hence to hold the surface of the heel against the disc. Removal or abrading of the surface of the covering material immediately adjacent the corner is prevented by the shoulder 24 which holds the heel away from the concave surface 22 sutficiently so that the portion of the covering next to the corner is not exposed to abrasion and hence can be wrapped around the corner as shown in FIG. 4.

To facilitate feeding the work the disc 12 is driven in a direction to assist in moving the heel peripherally throughout the entire length of the projecting margin. A guard 34 is mounted at the upper side of the abrading wheel to prevent accidental injury to the operator by contact with the rapidly rotating brush.

The disposition of the supporting disc 12 for rotation about a horizontal axis, that is, with its concave surface 22 substantially perpendicular, makes it possible to abrade the marginal edge of the heel covering much more expeditiously than could be performed on the prior machine since the provision of the concave surface 22 rather than the annular concave groove makes it possible to turn the relatively sharp radius of curvature at the top and bottom surfaces of the heel with a greater degree of accuracy than was possible on the prior machine.

The heel shown herein, known as a wedge heel, is for the purpose of illustration only, the machine being adapted to be used for roughing the marginal edge of covering material applied to any type of heel or other object especially when the edge of the article is curved and the radius of curvature is relatively short.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents which fall within the scope of the appended claim.

I claim:

Apparatus for roughing the marginal edge of a flexible covering attached to one side of a rigid backing with its edge extending beyond the backing, comprising a rigid, rotatable supporting disc having a peripheral edge against which an edge of the backing is held and a diametrical side against which the margin of the covering rests while the edge of the backing is engaged with the edge of the disc, an abrading wheel arranged with its peripheral edge adjacent the diametrical side of the disc for contact with the margin resting thereon, means for rotating the abrading wheel in a direction to exert a force on the margin toward the center of the disc so as to hold the backing engaged with the edge thereof, and means for turning the disc in a direction to assist in advancing the backing peripherally; the improvement comprising, said diametrical side of the disc having a uniformly smooth, spherically concave surface concentric with the axis of rotation and extending entirely across the surface of said disc, and the center of rotation of the abrading 4 Wheel coinciding with the center of curvature of the concave surface of the disc so that the peripheral surface of the abrading wheel and said concave surface of the disc are concentric.

References Cited in the file of this patent UNITED STATES PATENTS 2,840,835 Prue July 1, 1958