US2009553A - Machine for trimming and molding heel covers - Google Patents

Description

July 3%, 1935. N. H. KNOWLTON MACHINE FOR TRIMMING AND MOLDING HEEL COVERS Filed NOV. 13, 1933 3 Shgets-Sheet l MMWTM? WM M July 30, 1935. N. H. KNOWLTON MACHINE FOR TRIMMING AND MOLDING HEEL COVERS 3 Sheets-Sheet 2 Filed Nov. 13, 1953 pg w 1 y 1935. N. H. KNOWLTON MACHINE FOR TRIMMING AND MOLDING HEEL COVERS Filed Nov. 13, 1935 3 Sheets-Sheet 5 k0 gw Patented July 30, 1935 UNITED STATES PATENT OFFICE MACHINE FOR TRIMMING AND MOLDING HEEL COVERS Application November 13, 1933, Serial No. 697,765

\ 13 Claims.

This invention relates to the manufacture of shoes and is illustrated as embodied in a machine for operating upon heel covers.

In covering Louis heels of the type disclosed in United States Letters Patent No. 1,861,662, granted June '7, 1932 on an application filed in my name, it is customary as described in said patent to inturn the forwardly projecting margins of a side cover of a heel upon the lateral portions of the breast of the heel and to tuck the edge portions of the margins into cover-receiving grooves which are cut in the breast of the heel and extend heightwise of the heel along the breast edges of the same, the top projecting margin of the side cover being inturned upon and secured to the attaching face of the heel.

Each of the cover-receiving grooves terminates at an upper breast corner of the heel and breaks through the front end of the relatively thin forwardly projecting lip of the heel and thus forms a notch in the lip, a thin sliver being left between an adjacent side of the heel and the notch.

During the heel-covering operation, each of the slivers is covered by inserting the top part of the forwardly projecting cover margin through the notch and into opposed relation to the top cover margin which has been laid upon the attaching face of the heel. In order to brace the sliver against being broken, the opposed margins of the cover, after being pulled around the sliver, are cemented together under pressure and are also cemented to the attaching face of the heel. The opposed portions of the projection margins of the cover are then trimmed a slight distance ahead of the forward edge of the lip of the heel in order to insure that the upper breast corner portions of the heel blank are covered and to provide a lip which, as viewed from the side of the heel, is

wedge-shaped and merges gracefully with the shoe upper.

It is common practice for the operator to trim the portions of the opposed marginsof the cover which project forwardly of the lip of the heel by a pair of hand shears and then to squeeze together the remaining opposed margins to which cement has been appliedby a pair of tweezers constructed to enter the notch. The hand operation is slow and it frequently happens that a careless operator breaks one of the slivers from the heel and thus spoils the same.

The general object of the present invention is to provide a machine by which the manual performance of these and similar operations may be obviated. To this end, in accordance with one feature of the invention, there is provided a machine for operating upon a shoe part, superposed margins of a cover of which project beyond an edge thereof, having trimming mechanism, pressing mechanism, means for facilitating presenta tion of the shoe part to said mechanisms, and means for operating said mechanisms to trim the margins to a predetermined length and to press the trimmed margins together. In the'illustrated machine, which is particularly adapted to operate upon a covered heel having a notch in its lip, a support or table carries gages for locating the heel properly with respect to a reciprocating cutter and a reciprocating presser which is shaped and arranged to enter the notch, said cutter and presser being caused to operate in the 'order named to trim the superposed projecting margin of the cover and to press it against the support.

The illustrated presser member is electrically heated in order to facilitatethe molding of the leather, fabric or celluloid cover during the pressing operation. To increase the speed of the machine, right and left units are provided to which the margins projecting beyond the upper left and right breast edges of heels respectively may be simultaneouslypresented to be operated upon.

With the illustrated construction folded-over projecting margins of heel covers may be quickly and effectively trimmed to a predetermined length and adhesively pressed together, the. heel being accurately positioned relatively to the presser member and rigidly supported during the pressing operation to insure against breaking the sliver.

These and other features of the invention, including certain details of construction and combinations of parts, will be described as embodied in an illustrated machine and pointed out in th claims.

In the drawings,

Fig. 1 is a perspective view of the illustrated machine, a heel being shown in position to be operated upon in the machine;

Fig. 2 shows a vertical section of the machine taken along line 11-11 of Fig. 3;

Fig. 3 is a detail plan view of the operating head of the machine, portions of which have been broken away; a

Fig. 4 is a detail view showing a heel and projecting margins of its attached cover presented to the machine;

Fig. 5 is a perspective view of a wood heel blank which is to be covered;

I Fig. 6 is a perspective view showing the heel blank after a side cover has been appliedthereto and Fig. '7 is a perspective view of the heel portion of an inverted shoe.

The machine is described with reference to heels such as disclosed in the above-mentioned United States Letters Patent No. 1,861,662. In covering a Louis heel blank 20 the breast 22 of which is provided with cover-receiving grooves 2% arranged in substantially parallel relation to corresponding breast edges of the heel and terminating at the upper breast corners 26 of the heel, it is customary to apply a single piece of covering material 28 to therear and side faces of the heel, which material is commonly referred to as a side cover. After the side cover 23 has been secured to the rear and side facesof the heel, the top, the forward, and the bottom projecting margins 39, 32 and 34 of the cover are inturned upon and secured to the attaching, the breast, and the toplift-receiving faces 36, 22 and 38, respectively, .of the heel, the end portions of the forwardly projecting margins 32 being tucked into and secured within corresponding grooves 24.

It will be noted that the Louis heel blank 20 is provided with .a forwardly projecting lip 45! which is relatively thin andthat the upper end of the groove breaks through the lip toform a notch 42, athin sliver. i l'being left between the side of the heel and the notch 42. The forward projecting margin 32 of the cover extends through the notch 42 (Fig. 6) and above the attachingface 36 of the heel in opposed relation to the top projecting margin 38 of the cover. After the covered heel has been attached to the shoe (Fig. 7) the lateral margins of a heel-breast covering flap 46 which is split from the sole 48 of a shoe 41, to which theheel is attached, are tucked into the grooves 24 alongside thetuckedin margins of the side cover 28.

Before attaching the partially covered heel to the shoe upper :37 it is customary for the operator by the use of a pair of shears to trim the opposed margins 30, 32 which project forwardly of the front edge 59 of the lip 48 of the heel, to a pre lateral portions of'the edge 49 of the lip 40 in order that such portions of the heel blank 29' may be covered in the finished shoe. Moreover, a small quantity of cement is applied between the opposed margins 36, 32, the margins being squeezed together ;by a'pair of hand-operated tweezers which engage within the notch 62 of the groove 24 in order to draw the cover tightly around the sliver 44, the opposed margins then being cemented tothe attaching face 36 of the heel. The sliver 44 is therefore supported by the cover against being broken from the heel, and the forward upper breast corners of the covered heel terminate ,in feather edges which merge gracefullywith the shoe upper When the above-described operation is performed by hand the operator sometimes cuts the opposing projecting margins too close to the edge of the sliver and thereby causes the upper breast corners of the heel blank to be exposed to View in the finished shoe. Moreover, in wrapping the cover about the sliver 44 and cementing the opposed margins 33 '32 together the'operator frequently splits the same from the heel.

The illustrated machine, which may beused effectively and quickly to perform the trimming and molding operation, is provided withia presser foot or member 50 which is mounted for vertical movement and is of suitable shape to enter the notch 42 of the groove 24 and to press the opposed marginal portions 30, 32 against a block 52 which forms part of a support or table 5 upon which the heel is placed attaching face 36 downwardly.

The table 54 is bored to receive the block 52 which is provided with a convex surface 56 (Fig. 1) arranged to project above the table 5 3 and having a curvature generally complemental to that of the attaching face 35 of the heel in order effectively to support the sam and the projecting portions of the opposed margins 3Q, 32. The illustrated block'52 is provided with an opening 58, a curved edge 60 of the block serving as a shearing edge past which a vertically moving cutter or knife 52 maybe moved to trim the projecting margins 30, 32 a short distance forwardly of the front edge 49 of the attaching face 36 of the heel. Blocks having heel-supporting surfaces 56 of various shapes may be substituted for the illustrated block 52 in accordance with the shape of the work being operated upon in the machine.

The machine is provided with right and left stations or units A and B (Fig. 3) constructed and arranged to operate upon the upper left and right corners of heels, respectively. In describing the machine it will be necessary to describe but one of the stations, it being borne in mind that for each part of one station the other has an opposed but corresponding part.

In order to position the heel upon the table 54 so that the notch 42 of the roove 24 is arranged beneath the presser foot 53 and the forward edge 49 of the attaching face 36 is arranged close to but spaced from the shearing edge 60 of the block 52, the illustrated machine is provided with gages 64, 66 and 68. The gages 64 and 66 may be adjusted in directions indicated by arrows 69 (Fig. 1) relatively to the table 54 through screw and slot connections and [2, respectively, such gages being positioned for engagement with spaced portions of the side of the heel which are located adjacent to the attaching face 36. The gage or abutment 68 is arranged for engagement with the forward edge 49 of the attaching face 36 of the heel and may be adjusted in directions indicated by arrows 14 through the provision of screw and slot connections 15.

The presser feet 50 are carried by a housing 18 which is pivotally'mounted upon a rod 80 journaled in a bracket 82, the bracket being adjustable relatively to the table 54 in directions indicated by arrows 84 upon release of screws 86 which pass through elongated slots 88 formed in the bracket.

Each of the pressure feet 50 is clamped by a screw 90 (Fig. 3) to a shank piece 92 which is pivoted about the stem of a screw 94 carried by a dome portion 96 of the housing 78. Each of the presser feet '50 may be pivotally adjusted about the screw 94 by moving screws 98, I00, the end portions of which engage the housing 18, in opposite directions, in accordance with the location of the notch 42 of the heel positioned upon the table 54. The cutter 62 is of arcuate shape and has a cutting edge which is substantially complemental to the shearing edge 60 of the block 62 and severs work which may be simultaneously presented to stations A and B. The illustrated cutter 62 is secured to a slide I82 (Fig. 2) which is mounted for reciprocation in a vertically disposed guideway I04 of the machine and is operated through a link I06 by a treadle I88 (Fig. 1). The slide 32 is normally held in a raised position by'a spring He the upper end of which is secured to'the main frame and the lower end of which'is'mounted for movement with a collar I09 adjustably secured by a screw ill to the link' through an elongated recess H6 of the housing 78, the housing at all times being held against a stud H8, secured to the slide Hi2, by a spring iii!) surrotmding the pin l2 and having its'upper end in engagement with a nut 122 carried by the pin l I 2 and its lower end in engagement with a washer F24 surrounding the pin and overriding the recess H6. With such an arrangement it will be clear that as the operator depresses the treadle let the cutter 62 cooperates with the shearingedge 50 to sever the projecting marginal portions 39, 32 of the cover and that upon continued downward movement of the slide I92 the presser members 59 engage within the respective notches 52 or" the grooves 24 and press the folded-over margins against the surfaces 55 of the block 52, the spring I29 being compressed.

by movement of the slide I02 during such operation. The recess H5 is of suiiicient diameter to permit reciprocation of the slide I92 and pivotal movement of the housing 13. Downward movement of the slide M2 is limited by a screw 25 which is adjustably mounted in the main frame, upward movement of the slide E92 under pressure of the spring being limited by a collar $28 secured by a screw I29 (Fig. 1) to the slide. The machine frame may be conveniently mounts upon a pedestal 839 or upon any other convenient support.

In order to facilitate the molding of the cover which may be made of leather, fabric or celluloid the housing '88 is bored to receive a heating unit 532 (Fig. 2) having connections I3 3.

In order to perform the trimming and the molding operation the operator, after properly adjusting the gages cs, St and 68 and the presser members 59 positions the heel in unit A, as illustrated in Fig. 3 and steps on the treadle I98 to trim opposing projecting margins 38, 32 at one upper corner of the heel to a desired length and then to cause the presser member 50 to enter the notch 42 of the groove 24 to force the margins against the table 54 thereby to wrap the cover around the sliver M and adhesively to secure the margins to each other. The heel is then removed from station A and is positioned in station E to perform a similar operation upon opposed margins 30, 32 which are located adjacent to the other upper corner of the heel. It will be noted that opposed margins extending from the right and left upper corners of two heels respectively may be trimmed and molded during a single cycle of operation of the machine when two heels are presented to units A and B of the machine, as

illustrated in Fig. 3.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. A machine for operating upon a shoe part, superposed margins of a cover of which project beyond the edge thereof, having in combination, trimming mechanism, pressing mechanism, means for facilitating presentation of the shoe part to said mechanisms, and means for operating said mechanisms to trim the margins to a predetermined length and to press them together.

2. A machine for trimming and molding covers of heels having, in combination, a support for a heel opposing margins of an attached cover of which'project beyond the" heel, gages for positioning the heel and saidmargins rela' tively to thesupport, a cutter for trimming the margins to a predetermined length, a presser member for forcing the margins together, and means for operating the cutter and the presser member. j I 1 3. A machine for 'trimming' and molding covers of heels having, in combination, a cutter, a presser member, a support for heel to which a cover has been applied, gages for positioning the heel and folded-over margins of the cover which project beyond the heel upon the support relatively to the cutter and the presser member, and means for operating the cutter to trim the projecting margins to a predetermined length and heel, mechanismior positioning" the heel upon the support, a cutter constructed and arranged to trimprojecting margins of the cover adjacent to the corner, and a presser member constructed and arranged'for engagement within the notch adjacent to the corner for forcing portions of the cover which are in opposed relation against the table. 7

5. A machine for trimming-and molding covers of heels having, in combination, a table, gages for positioning upon the support a Louis heel provided with a cover one marginal portion of which passes through and projects beyond a notch formed in the '.lip portioncr" the breastof the heel and is in folded-over relation with respect to a covermargin inturned upon the attaching face of the heel, a, cutter for trimming parts of theifoldedover margins of thejcover which extend forwardly of the lip portion of the heel to a predetermined length, and a presser member constructed and arranged for engagement within the notch to press the folded-over margins positioned in the vicinity of one of the upper breast corners of the heel against the table.

6. A machine for trimming and molding covers of heels having, in combination, a member for supporting a Louis heel provided with a part which is included between a side of the heel and a notch cut in the upper projecting portion of the breast of the heel and around which a cover having margins projecting beyond the heel has been wrapped, a cutter for cooperating with the member to trim margins of the cover which project forwardly of the lip of the heel to a predetermined length, and a presser member shaped and arranged for movement through the notch to force margins of the cover which are wrapped heel, a cutter, said member and said cutter being mounted for movement relatively to the support, and mechanism constructed and arranged to operate the member with yielding pressure to force said portions together and positively to operate the cutter relatively to the support 'to trim said portions to a predetermined length.

8. A machine for trimming and molding covers of heels having, incombination, a support, a member for forcing opposed margins of a cover wrapped around a heel part formed between a side of the heel and a notch formed in the forwardly projecting lip of the heel against the support, a cutter for trimming opposed margins of the cover which project beyond the lip of the heel to a predetermined length, and means constructed and arranged first to operate the cutter to sever the projecting margins and then to move the presser member through the notch to secure together opposing cover margins to which cement has been applied.

9'. A trimming and molding machine having, in combination, a table for supporting a heel provided with an attached cover folded-over margins of which project beyond the heel, said table having a shearing edge, gages for positioning the heel and the projecting margins of the cover relatively to the table, a presser member, a cutter, and mechanism for moving the cutter past the shearing edge to trim the folded-over projecting margins to a predetermined length and to force the presser member against the folded-over margins supported by the table thereby to press the same to a feather edge, said presser members being mounted for pivotal and rectilinear adjustment for positioning the same relatively to the table.

10. A machine for trimming and molding covers of heels having, in combination, a support, gages for positioning upon the support a Louis heel provided with a cover a forward margin of which passes through and projects beyond a notch formed in the projecting lip of the breast of the heel and is arranged in'folded-over relation with respect to a margin of the cover inturned upon the attaching face of the heel, a cutter for trimming the folded-over margins of the cover which project forwardly of the lip of the heel to a predetermined length, a presser member constructed and arranged to pass through the opening for pressing the folded-over margins against the table, mechanism for operating the cutter, a carrier for the presser members, and yieldable connections between said mechanism and the carrier.

11. In a machine for trimming and molding covers of heels, a support having a shearing edge, a cutter mounted for reciprocation past said edge, a pair of presser members positioned adjacent to the cutter, a carrier for said presser members, said carrier being mounted for swinging movement toward and away from the support, means for operating the cutter, and yielding connections between said means and the carrier.

12. In a machine for trimming and molding covers of heels, a support having a shearing edge, a cutter mounted for reciprocation past said edge, a pair of presser members positioned adjacent to the cutter, a carrier for said presser members,

said carrier being mounted for swinging movement toward and away from the support, a slide for operating the cutter, and yielding connections between the slide and the carrier, said carrier being adjustable relatively to the cutter and the presser members being pivotally adjustable relatively to the carrier.

13. In a machine for trimming and molding covers of heels, a support having a convex surface which terminates in a shearing edge, a cutter movable past said edge, a presser member movable relatively to said surface, gages for positioning a heel and folded-over projecting margins of the cover attached to the same upon the support, and means for operating the cutter and the presser member relatively to the support thereby to trim thefolded over projecting margins to a predetermined length and to press remaining portions of said margins against the convex surface.

NORWOOD H. KNOWLTON.

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