US2560533A - Shoe press last structure - Google Patents

Description

Jul 17, 1951 E. DUNFCRD SHOE PRESS LAST STRUCTURE Filed Aug. 15, 1949 gfigigu/viord Patented July 17, 1951 UNITED SHOE-PRESS LAST "STRUCTURE Ernest DurifordgS tLouis, Mo., assignor to Landis Machine-iCompanysShLouis, 'M0., 2. corporation :ofEMissouri Application August 15, 1949,'Selfia'l"No.,'1'10,345,

The invention relates to shoe presses used, for

example, in cementing soles-on shoes andof "the general type shown in C. L. HuntoonPatentNo. 2268,1374,issued'January 6, 1942, and more par- 2 Claims. (01. 212-33.)

2 wardl alongside support-" 2 and pad t. A yoke 6, piveted'at l; to the upper ends of rods 5, is ad- 7 justable angularly about its pivot and 'may be lockedinadjusted position-by knob 1a. The-yoke ticularly to the last structure associated witli fi ispivctedto the'upper end of a C-shaped-holdsuch a preSs'one-form of which is shown in C. L.

r .lE-Iuntoon Patent No. 123,102,222, "issued November I cut 'h'eighths of heels, there arise troublesome problems of applying-pressure-"all along'thesole and shank of-the shoe substantially evenly or sufficiently even-1y to effecta *satisfactory 'ceinentin-g operation. 'The difficulties*may a-rise from the angle of thrust applied to the last or to the point of application of the thrust from the last to the shoe.

It is the main object of the present invention to control the angle or direction of thrust and the application of the thrust from the last to the work so as to effect a substantially even pressure throughout the area to be cemented.

The invention comprises a hold-down arm of general c-shape arranged to receive thrust at its upper end and to transmit thrust at its lower end to spaced points on relatively hinged sole and shank plates in a direction substantially perpendicular to the work, irrespective of the angular relation between the plates which varies with the length of the sole and shank and the height of the heel. The invention also includes the relation of such a hold-down and plate structure to the work support and the mechanism for developening pressure.

In the accompanying drawings illustrating a selected embodiment of the invention:

Figure 1 is a small scale assembly of the press and associated parts in operative relation to a shoe.

Figure 2 is a vertical section, drawn to enlarged scale, taken on the lonigtudinal center line of the last and associated parts shown in Figure 1.

Figures 3 and 4 are similar sections showing the hold-down, shank plate and sole plate in different relative positions.

Figure 5 is a top view of the hold-down, shank and last plates taken approximately on the line 5-5 of Figure 2.

The shoe press base I mounts a work support 2 provided with a pad 3 to which the shoe S may be applied. Pressure developing and applying mechanism is mounted in or on base I and includes hand wheel 4 and rods 5 extending updown a-r'm'll forming a part of the last structure. The above described arrangementcorresponds to that detailed in an application of the present inventor filed November 12, 1947, "Serial No. 785,209, now Patent N o. 2,4822968, "issued'september 27, 1949.

The lower "end of armJll'is slotted at it and a headed'pin Ill is received in the slot, and pro'jects downwardly therefrom through 'a suitable open- .:ing in a sole plate 'I I.

A -spring I2, compressed between a downwardly facing shoulder in the sole plate and a collar I3 on the lower end of pin IIl, thrusts the sole plate and the lower end of arm 8 towards each other.

A shank plate I4 has a hinge joint connection I5 to sole plate II, the axis of the hinge joint extending transversely of the length of the last. An angular pointed or edged tooth or ridge I 6 projects upwardly from plate I4 and is received in a notch I! in the opposing portion of arm 8.

The contours of the contacting faces of arm 8 and sole plate I I are such that variation in the angle between the arm and sole plate will result in transmission of thrust from the arm to the sole plate at difierent points lengthwise of the last, the arm sliding along the sole plate as .de-

termined by the inclination of shank plate I4 to the sole plate, but being held by elements I6 and I1 against sliding movement along the shank plate. The drawings show the top face of the sole plate as being substantially flat and the bottom face of hold-down arm 8 being convex so that the two faces are tangent to each other, irrespective of the angle between the plate and arm. Similar results will follow if the planoconvex relation were reversed or both surfaces convex or if the surfaces were concavo-convex but defined by arcs of different radii.

When the last structure is applied to an average high heel shoe as shoWn in Figure 2, the sole plate and shank plate would take the relative angular position there indicated. With a spike heel in which the angle between the shank and V sole is less, the shank plate and sole plate will take the relative positions shown in Figure 3 in which the lower end of arm 8 would rock and slide forwardl along sole plate II. In a Cuban heel with a greater angle between the shank plate and sole plate as shown in Figure 4, the lower 3 end of arm 8 will rock and slide rearwardly of the sole plate.

With each adjustment of the hold-down arm, shank plate and sole plate, the thrust is transmitted from the arm to the plates at points substantially spaced from each other rearwardly and forwardly, respectively, of hinge joint IS. The thrust on the sole plate is always forwardly of the ball of the shoe and substantially perpendicular to the sole and the thrust on the shank plate 10 is always at a distance from the hinge joint and from the thrust on the sole plate, irrespective of the height of the heel.

With this arrangement, the last plates II and M are substantially anchored longitudinally of 5 the hold-down arm but at the same time, the arm may move along the sole plate to accommodate different angular positions of the sole plate and shank plate as is required for shoes of diftion in angle between the shoe shank and sole.

The thrust exerted by mechanism 4,'5 is applied at desired angles to the work and the last cannot slip forwardly of the shoe and thrust a ainst the toe as has characterized last structures of this type used previously when it was attempted to apply a single last structure to shoes of substantially different heel height.

What is claimed is:

1. In a shoe press last, a sole plate and a shank the arm surface being convex and adapted to en-, 2,302,222

gage a portion of the sole plate surface, a single upstanding transverse ridge on the upper side of said shank plate, and an opposin transverse groove on the lower side of said arm whereby when pressure is applied to the last the interengaging surfaces between said ridge and groove will provide a pivot about which the shank plate may fulcrum in accordance with the height of the shank being pressed.

2. In a shoe press last, a sole plate and a shank plate hinged to each other, a hold-down arm, means to hold said sole plate to said arm but permitting relative sliding movement therebetween longitudinally of the last, the arm surface being convex and the sole plate surface being substantially flat, a single upstanding transverse angular ridge on the upper side of said shank plate, and an opposing transverse angular groove on the lower side of said arm whereby when pressure is applied to the last the interengaging surferent heights of heels andthe resulting varia- 20 faces between said ridge and groove will provide a pivot about which the shank plate may fulcrum in accordance with the height of the shank being pressed.

ERNEST DUNFORD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,004,820 McLeanathan June 11, 1935 2,014,981 Pizza et al Sept. 17, 1935 2,302,220 Huntoon 1 Nov. 17, 1942 Huntoon Nov. 17, 1942

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