US1920501A - Trimming machine - Google Patents

Description

Aug. 1, 1933. G,l GODDU 1,920,501

TRIMMING MACHINE Filed Jan. 24, 1,951 2 Sheets-Sheet l mf" 40 Figl Aug. 1, 1933. G GODDU 1,920,501

TRIMMING MACHINE Filed Jan. 24, 1951 2 Sheets-Sheet 2 Patented Aug. 1, 1933 Unirse srarss TRIMMIN G MACHINE George Gocldu, Winchester, li/lass., assigner to United Shoe Machinery Corporation, Paterson, N. J., a Corporation of New Jersey Application January24, 1931. Serial No. v510,915

c claims. (c1. 1pz- 82) This invention relates to trimming machines and is herein illustrated as embodied in a machine constructed and arranged to sever surplus material projecting from the bottom face of the insole of a lasted shoe.

invention is concerned with means arranged to regulate the closeness of trimming while the trimming operation is in progress.

An example of work involving a typical problem for which a machine embodying the. present invention is especially suited is illustrated and described in my copending application Serial No. 386,097, led August 15, 1929. As illustrated in that case, the insole of the shoe is provided with V upstanding lips extending along the opposite margins thereof from the forward part of the heel seat nearly to the toe end, where they meet, the lips being set in from the edges of the insole a distance of about one-half inch. In lasting such a shoe according to the method described in said copending` application, the overdrawn portion of the upper is stuck to the margin of the insole by an adhesive, but in addition, fasteners, preferably slender staples, are inserted through the margin of the upper and through the lips of the insole to maintain the tightly lasted condition of the upper while the adhesive is setting. a marginal surplus which .stands up fromvthe bottom of the insole and lies against the outer faces of the aforesaid lips. The fasteners are inserted as closely as possible to the rootsor bases of the upstanding lips of the insole. Subsequently, the upstan'ding lips of the insole and the corresponding upstanding margin oi the lasted upper may be trimmed iiush with the bottom of the shoe in the forepart to provide a smooth, even surface for receiving an adhesively-secured outsole, the

upstanding lips and the corresponding margin of 40y the upper in theshank portion of the shoe being trimmed less closely, that is, above the level of the fasteners, whereby these fasteners are 'retained in the shank portion ci the'nished shoe to supplement the vadhesive by which the upper and the insole are connected. The shallow channel between the unsevered portions of the lips in the shank portion is adapted to receive a shankstiffener. n

In View of the foregoing, an object of the present invention is to provide an improved machine adapted to sever surplus material standing up from the bottom of a lasted shoe, whereby, at the will of the operator, and even while' the machine is operating, the line of severance may be 'shifted to and-from the plane of the exposed bottom face A novel feature of the To this end the upper is out to provide mentioned. copending of the insole, to the end that the trimming may be substantially iiush with that face wherever such trimming is desired without necessarily being flush at other localities.

In accordance with the object above set forth V and with a feature of the invention, the illustratedtrimming machine comprises atrimming gage the work-engaging portion of which is formed and arranged to bear in a channel in the bottom surface of the insole of a lasted shoe, cutting means arranged to sever a lip or ange of material projecting from the channel with a cut that may be flush with the bottom surface ofthe insole, and manually operative means by which the trimming gage and the cutting means may be relatively shifted while in operation to alter the closeness of the trimming cut.

Asgherein illustrated, thev movable trimming gage is arranged tov engage the work at a point in advance of the `point where the trimming means operates and is so formed that it can be retracted as far as may be necessary to permit severing the upstanding materials flush with the bottom Asurface of the shoe.

Referring `to the accompanying drawings, I

Fig. 1 is a right-hand elevation of a ytrimming Amachine embodying the present invention in a preferred-form;

Fig. 2 is a perspective rear View of alasted shoe in process of being trimmed in accordance with the requirements hereinbefore mentioned, the figure including portions of the 'trimming means and the movable gage by which the closeness oi trimming is regulated;

Fig. 3 is a sectional view on a larger scale of a 90 portion of the forepart of a lasted shoe, the sur- `plus material of which has been trimmed iiush with the plane of the shoe bottom; and

Fig. 4 is a cross-sectional view of the shank portion of a lasted shoe, the surplus material of which has been trimmed above the level of the staples by which the upper is secured to the lip or rib of the insole.

The shoe illustrated in Fig. 2 is lastedin accordance with the method described in the aboveapplication Serial No. 385,097. It comprises a leather insole 1G having a marginal' feather l2 and upstanding lips each composed of two iiaps 14 and 16 split from the insole and bent upwardly from a common root 18. The lips oi the insole extend along opposite margins thereof from the forward portion of the `heel seat to a point near the toe wherer they meet at an acute angle. i

The upper, consisting of an outer layer 20 of 110 leather orother material and 'a lining 22, is

drawn tightly against a last 24 and is secured` to the insole at the heel-seat portion by-heele seattacks 26, but throughout the forepart and along opposite sides of thev shank it is secured to theeather l2 and to the upstanding lips of the insole by an adhesive. Slender wire staples 28, inserted at intervals through the upstanding marginal portion of the upper and through the upstanding lips oi the insole along theshank portion and in the ball portion of the shoe, are used to maintain the lasting tension of the upper while the adhesive is setting. Detachabl'ehol'ding means, which need not be described for the purpose of explaining the presentinvention, areused to maintain the lasting tension of the upper` in the -forepart and at the toe of the shoe while the adhesive is setting but are subsequently removed, with the result that at these localities the connection between the upper and the insole of the iinished shoe will be 4maintained solely bythe adhesive lwith whichthe contacting faces of the upper and the insole have been coated prior to the lasting operation.

The stock split from the feather 12 of the insole to provide the upstanding flap 14 is replacedby the overdrawn material ofthe upper, with vthe result that 'the bottom ysurface 30 of that portion or the upper which lies on the feather l2 (see Fig. 3) lies substantially in the plane of the exposed bottom surface 32 ofthe insole. The `upper is cut to provide surplus marginal material by which it may be gripped for lasting purposes and also to provide an upstandf ing flange 33 to receive the lasting staples 28.

These staples are located *slightlyA `above the bend or angle`34 (see Fig. 4)` of the upper material which is tucked snugly into ythe angle formed bythe'eather 12 and the lip of the insole.

VA shoeof the type herein described is subsequently provided with an outsole which is secured thereto byan adhesive only, except at the heel seatwhere heel-attaching nails may supplement the adhesive. In accordance with the method described in the aforesaid copending ap` plication, it is necessary to sever the upstanding elements 14 and 16 of the insole and the corresponding upstanding flange 33` o `upper mate.- rial flush with the bottom surfaces 30 and `32 g throughout the forepart of the shoe to provide alsmooth, even bottom or foundation for the outsole. On the other hand, it is not necessary to trim these upstanding elements flush with the surfaces 30 and`32 in the shank portion ofthe g shoe because the space between them will be occupied bya shank-stifener. Nevertheless, it

elements in the shank portion (see Fig. 4) to the end that their trimmed edges will be substantially flush with the bottom surface of the shank-stiffener.

With regard to these requirements, the` present invention provides an improved trimming machine by which, in one continuous operation beginning at the heeleseat portion of the shoe and progressing thence along one side of the shoe to and around the toe end and thence along the other side of the shoe to the heel-seat portion, the upstanding materials may be severed j above the staples 23 (see Fig.

4)` at each side of the shank portion but severed iiushwith the surfaces 30 and 32 throughout the forepart.

The general organization of the illustrated trimming machine is similar to that of the machine -illustrated in U. S. Letters -Patent JN0.

`opposite faces of the material.

429,065, granted May 27, 1890 on application of Schaadt and Clark, but the'machine herein il-` lustrated embodies certain novel features hereinafter described by which the `closeness of trimming may be regulated by the operator while the trimming operation is in progress.

Referring to Figs. 1 and 2, the trimming means comprises two cutters or blades 36 and 38 which cooperatewith successive shearing cuts against The cutter 36 is afllxed to the frame 4() by clamping bolts 42 and is provided with a vertical slot through which theshanks of these bolts extend, the slot providing for vertical adjustment of the cutter to insure a trueshearing action. The cutter 38 1s carried by a horizontally movable slide 44 to which it is aixed by a clamping bolt 46. The slide 44 is arranged in a guideway formed in the frame and is operated by an eccentric 48 to whichit is connected by an eccentrcstrap 50, a pivot pin `52 forming the connection between theslide andthe strap. The eccentric 4S is carried by a shaft 54 journaled in bearings in `the frame 40 and provided with a receiving .pulley over which a driving belt 56 runs. This `receiving pulley is concealed in Fig. 1 by a hand-wheel 5S, that appears in the foreground.

Referring to Fig. 2, the cutter 36 is provided with a shearing edge .60 that cuts agaimt the inner face of the upstanding insole'lip 16, and the cutter 38 is provided with a shearingedge 62 that cuts against the outer `face of the upstanding -flange 33 of upper material. These edges Yremain always in `lapped relation but `are inclinedin opposite ldirections with'respectvtothe l direction of feeding movementof theworkwhlcn is indicatedvby an arrow in Fig. 2. The `movable cutter 38, which is thin and at, projectsunder thecutting edge of the stationary cutter 136.

Consequently, when a shoe is presented to the trimming means, as shown in Fig. 2, the surface 30 of the overdrawn portion of the upper .will

ranged to `engage the bottom of the insole ata point, inladvance of .the cutters with regard ,to`

the direction of feeding movement. Otherwise stated, the*work-engagingportion of the gageiis atthe feeding-in side of the trimming locality, and since it does not mask either of the cutters it may beraised suciently to'provicle for `iiush trimming ofthe surplus materials by the cutters. This gage is arranged in alguidewayor groove formed in the framefl and is maintainedtherein by a plate 66. The lower end of the gagenprojects `laterally toward the movable blade.38 and is preferably curved'sothat it may Vabutithe insole only inthe angle formed by the root-18 oflthe lip- 16 andthechannel` from whichthe lip projects.

Moreover, this laterallyprojecting extremitypf bottom. However, even if -the upstanding mate-I rial does lean, the vertical portion of thefgagefwill clear it and thus'avoid obstructing'theifeeding movement-oi theshoe.

. Treadlemechanismwisprovided/for movingthe gage 64f-up and-downwhile the trimmingnopera- The lateral projection .of i

law

tion is in progress, to the end that the gage may be used to depress the shoe and thereby cause the trimming means -to sever the upstanding'materials above the level of the staples 28, with the result shown in Fig 4. For this purpose the frame 40 is provided with a lever 70, the fulcrum of which is indicated at 72. The forward end of the lever, which is forked, straddles a stud 74 carried by and projecting from the upper end of the gage 64. A .rod 74 connected to the lever 70 by a pivot 78 extends downwardly through a boss 80 formed on the frame 40, the lower end of the rod being connected to a treadle 82 by a pivot pin 84. These elements are all normally raised by a tension spring 86, the ends of which are connected'respectively to the treadle 82 and to an anchoring member 88 aflixed to a supporting column 90 on which the frame 40 is mounted and to which the treadle is connected by a fulcrum pin 92. The rod 76 is provided with two adjustable collarsr 94 and 96 arranged respectively above and below the boss 80. These collars are provided with set-screws 98 by which they may be secured to the rod 76 at the desired positions to be arrested by the boss 80 and thereby establish the desired limits of vertical movement of the trimming lgage 64.

. In practice, the collar 96 will be secured -to the rod 76 at a point that will permit the lower end of the trimming gage 64 to rise approximately to the level of the trimming cut, while the collar 94 will be set at a position that will enable the trimming gage to depress the shoe far enough' to insure trimming the upstanding materials on the shoe bottom above the level of the staples 28.

In using the machine, the operator will present a shoe to the trimming means while holding the heel end of the shoe in the left hand and the toe end in the right hand and will begin the trimming operation near the heel end and feed the shoe from right to left (see the arrow in Fig. 2). At the outset, the operator depresses the treadle 82, thereby causing the trimming gage 64 to depress the shoe so that the upstanding materials on the shoe bottom will be trimmed above the level of the staples 28, as'shown in Fig. 4. This position of the trimming gage will be maintained while the trimming operation progresses along the shank portion of the shoe, but When the trimming has progressed to a point in the vicinity of the forward end of the shank portion, the operator will permit the treadle to rise under the influence of the spring 86, meanwhile continuing to feed the shoe without interrupting its progress. As the trimming gage rises, the operator will raise the shoe as far as the surface 30 and the lower cutting blade 38 will permit, and will preferably tip the shoe slightly toward the rear to insure severing the upstanding materials flush with the surfaces 30 and 32 (see Figs. 2 and 3). Under these conditions the trimming cut will be below the staples 28 in the ball portion ofthe shoe and these staples will remain in the strip 100 of surplus material that is cut off.

The flush trimming will be continued to and around the toe end of the shoe which will now be turned end for end so that the operator will hold the heel end in his right hand and the toe end in his left hand. From the toe end he will continuevthe trimming along the opposite side of the shoe, again feeding the shoe from right to left. When the iiush trimming has progressed to a pointvat or near the Ajunction of the ball portion and the shank portion, the operator will again depress the treadle 82, whereupon the trimming gage 64 will depress the shoe far enough to place the staples 28 below the plane of the trimming out. This position of the trimming gage will be maintained until the trimming is nished at or near the heel seat.

Having thus-described my invention, what I claim as newand desire to secure by Letters Patent of the United States is:

1. A trimming machine comprising a trimming gage the work-engaging portion of which is formed and arranged to beary in a channel in the bottom surface of the insole of a'lasted shoe, cutting means arranged to sever alip or flange of material projecting from said channel with a cut that may be flush with the bottom surface of the insole, the entire work-engaging portion of the gage being arranged atl the feeding-in side of the trimming locality, and manually operative means by which the trimming gage and the cutting means Amay be relatively shifted while in operation to alter the closeness of the trimming cut.

2. A trimming machine comprising a trimming gage the-workengaging portion of which is formed and arranged to bear in a channelin the bottom surface of the insole of a lasted shoe, cutting means'arranged to sever a lip or flange of material projecting from said channel with a cut that may be flush with the bottom surface of the insole, the entire work-engaging portion of the gage being arranged at the feeding-in side of the trimming locality and formed to engage the root of said lip or flange but to clear the surplus material projecting therefrom, manually operative means by which the trimming gage and the cutting means may be. relatively shifted while in operation to alter the closeness of the trimming cut.

GEORGE GODDU.

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