US1711946A - Shoe-upper-shaping machine - Google Patents

Description

' May 7,1929. I

E. A. HOLMGREN -SHOE UPPER SHAPING MACHINE Original Filed Jan. 2, 1926 2 Sheets-Sheet l Fig.1. w 52 May 7, 1929. E. A. HOLMGREN 1,

' SHOE UPPER SHAPING MACHINE Original Filed Jan. 1926 2 Sheets-Sheet 2 Patented May 7, 1929.

U STATES 1 1 1,711,946 PATENT OFFICE,

Euro 11. HOLMGREN, or LYNN, MASSACHUSETTS, AssIeNoR T uivrrnn SHOE MA- cnnvnn'r eonronnrron, or PATERSON', NEW JERSEY, A CORPORATION or NEW JERSEY.

SHOE-UPPER-SHAIIN G MACHINE.

Application filed January 2, 1926, Serial No. 78,846. Renewed June 14, 1928.

This invention relates to machines for use in the manufacture of boots and shoes for shaping the upper materials, and is herein illustrated in its application to a type of machine the general organization of which is shown and described in Letters Patent No. 1,692,284, granted on November 20, 1928, upon an application of \Villiam C. Baxter, having means for molding the toe of the upper, oil the last, substantially to the shape desired. tor the finished shoe. It is to be understood, however, that in some of its novel and useful aspects the invention is not limited to machines of that particular type, nor to machines for shaping or molding the upper over a form of the character illustrated as distinguished from a. different kind of form such, for example, as a last.

In accordance with the invention set forth in a co-pcnding application of \Villiam C. Baxter, Serial No. 28,389,.filed on May 6, 1925, there were provided, in a machine of the above-mentioned type, grippers which ipped the margin of the upper at the opposite sides of the toe substantially at the ends of the tip seam and acted, in the shaping or molding of the upper over the form, to control the margin of the upper, so as to insure that in the molded toe the opposite ends of the tip line would be at the proper distance from the end of the toe. In the construction shown in thatapplication the grip} ers were mounted to move inwardly toward the form, in response to the pull of the upper thereon in the .molding operation, in directions substantially perpendicular to the longitudinal median line of the form.

The present invention, in one aspect, provides a construction in which margin controlling or gripping means is movable, at least at one side of the form, in such manner as to effect a definite rearward displacement of the nnn'gin of the upper. In the molding of some styles of toes this is found to be an advantage in that itlessens the tendency for wrinkles to form about the end of the toe the margin of the upperis wiped inwardly to produce a flange adapted for attachment to an insole. Under some conditions. it may he preterabie thus to effect a rearward displacement of the margin of the upper at one side only of the form, while under other conditions it will be advantaas herein illustrated, to effect difi'erent degrees of rearward displacement of the margin at the opposite sides respectively. ,To meet such varying conditions of use, and under all conditions to permit such variation in the extent of rearwarddisplacement of the margin of the upper as may be found desirable, the invention further provides for adjustment of margin-controlling means to vary the angular relation of its path of movement to the longitudinal median line of the. form. The construction herein shown comprises grippers arranged to grip and control the margin of the upper at the opposite sides of the form respectively and each adjustable independently of the other to determine the direction or path of its movement.

The invention willnow be more particle larly described by reference to the accompanying drawings and then pointed out in the claims.

In the drawings, 1

Fig. lis a view in side elevation of a portion of a machine of the type shown in the above-mentioned Letters Patent and application with the pr es entinvention embodied therein;

Fig. 2 is a plan View of a portion of the machine; 1 Fig. 3 is a view, partly in plan and partly in section, illustrating the relation otthe inner molding form to other portions of the machine;

Figs l and 5 are viewsof portions of the machine, partly in frontelevation andpartly in section, illustrating different stages in the molding operation; and I Fig. 6 shows the toeportion of an upper betoreit isopcrated upon by the machine. As shown and described in detail in the Letters Patentand application above men tioned, the machine comprises an inner toe form 10 (Fig. 3) which is mounted for operative downward movement, a toe band 12 which wipes the upper upwardly over the end and the sides of the form in response to the downward movement of the latter, wipers lwhich areadvanced and closed to wipe thegmargin of the upper into an angular groove 16 on the form 10 and to mold it to conform substantially. to the feather and the ribzot' an insole, and clamp members 18 which clamp the margin of the upper yieldingly upon the top faceot the wipers 14: to assist in drawing the upper tightly about the form in the downward movement of the form within the band 12. The upper is presented with its margin outspread upon the top face of the wipers, in exact prede termined relation to the molding instrumentalities, by the use of a tool (not shown) provided with pins which enter jig holes 20 in the margin of the upper and co-operate with slots 22 in the wipers to determine the position of the upper, as more fully shown and described in the Letters Patent and application. After the upper has been thus presented, it is clamped on the wipers with its margin in a plane parallel to the wipers by downward movement of the members 18, and it is also clamped or gripped in substantially the same plane at the opposite ends of the tip seam, adjacent to the rear ends of the clamp members 18, by opposite pairs of gripper jaws 2% and 26 which are mounted to swing inwardly toward the form in fixed paths in response to the pull of the upper thereon in the downward upper-shaping movement of the form 10, so as to prevent uncontrolled shi ting movement of the margin of the upper lengthwise of the form, in accordance with the general objects set forth in application Serial No. 28,389. In addition to the means for controlling the margin of the upper, there is provided a toe rest 28 against which the intermediate portion of the toe of the upper is clamped by the form 10, the toe rest being mounted for yielding downward movement as the form is depressed. The form 10, as herein illustrated, is provided with a lip 29 in the groove 16 in position to co-operate with the wipers to mold in that portion of the margin of the upper which is to lie against the rib of the insole a groove adapted to be utilized with a corresponding ridge on the rib of the insole to assist in determining the proper location of the molded toe rela tively to the insole.

In the -construction herein shown the gripper jaw 24: of each of the opposite pairs of jaws is fast one bar 30 which is secured at its upper end to an arm 32 pivoted at 3 on a bracket 36 mounted as hereinafter described. Arranged to engage the lower face of one end of the arm 32 is a spring 38 which is mounted in a holder d0 on the side of the bracket 36, this spring acting to swing the gripper outwardly away from the molding instrumentalities as far as permitted by a stop 42. This stop comprises a rectangular block eccentrically mounted on a stud 4st which may be turned by means of a knurled head 46 to determine different initial positions of the gripper for different sizes of uppers. It will be understood. that in the molding operation each gripper may swing inwardly toward the form 10 about its pivot 34 against the resistance of the spring 38 in response to the pull of the upper upon the closed gripper jaws.

Each of the gri 'iper jaws 26 is fast on a slide 48 mounted for movement on the bar 30 toward and from the co-operating jaw 2a. This slide universally connected to one end of a link 50 which at its other end universally connected to the front end of a lever mounted on a bracket Each of the levers 52 is connected at its rear end by a link 56 to an arm 58 on a rock shaft 60, and one of the arms 58 is-connected by a link 62 to operating mechanism of the character disclosed in a plication Serial No. 28,389. By this means the gripper jaws 26 are moved into position to grip the margin of an upper presented as hereinbefore described, and are thereafter moved at a predetermined time in the molding operation to release the upper.

The clamp members 18 are carried by swinging arms 6% substantially as illustrated in the co-pendin application. In the construction herein snown these arms are oper' ated by levers 66 through links 68, the levers 66 being connected respectively through links 70'and springs 72 to the different levers 52. It will be seen that when the levers are operated to close the gripper jaws 26 on an uppe they also act through the springs '4' 2 to move the clamp members 18 yieldingly into position to clamp the upper on the wipers.

F or purposes of this invention each bracket 36, with its gripper, is mounted for adjusting movement about an axis extending in substantially perpendicular relation to the plane of the wipers 14. To this end,

the bracket carries clampin bolts 7% the heads of which are positioned in an areshaped T-slot '56 on the head of the machine. The center of curvature of each slot 76 is preferably located at or near the wiping edge of the nearest wiper 1 lwhcn the wipers are'in open position, for example at the point a (Fig. Either of the grippers may thus be adjusted independently of the other to vary the angular relation of its path of movement to the longitudinal inedian line of the form and to set it, if desired, so that as it is moved inwardly toward the form it will have a substa ial component of rearward movement huglhwise of the form, i. e., movement rearwardly from the toe end of the form, and will thus effect a definite rearward displacement of. that portion of the margin of the upper which it engages. tocs it may be preferable for the gripper which operates at the inner or big toe side of the upper to have a greater component of rearward movement than the gripper at the other side. and the drawings illu trate an adjustment such as to accomplish this resl. t. By reference to Fig. 3 it will be seen that in in the melding of some styles of the style of toe form 10 illustrated the sharpest ciuwature at the end of the form is atthe inner or big toe side, and it is in this location that wrinkles are the most likely to be produced in wiping the margin oi the upper inwardly into the groove 16 in the form. If a substantial rearward displacement of the margin of the upper at this side of the form is effected in the inward move ment of the gripper at that side, there is less opportunity for prominent wrinkles to' be produced at the end of the form. At the other side of the "form the gripper may or may not have a component of r arward movement, the drawings illustrating an adjustment such that this gripper has a component of rearward movement considerably less in extent than the gripper at the inner side.

Such rearward displacement of the mar gin of the upper at the ends of the tip seam as that above referred to as effected in consequence of the illustrated adjustment of the grippers is not inconsistent with the proper positioning of the tip seam, provided the tip and the vamp are so out as to allow for the small amount of rearward displacement which is effected in the molding operation In other words, all that is necessary is to allow for this factor in calculating; the degree of the customary curvature of the tip seam of the flat upper, as illustrated in Fig. 6.

The progressive action of the machine upon the upper in the molding operation is illustrated in Figs. 4% and 5. After the upper has been presented to the machine in the manner hereinbefore described, the 1nargin of the toe end of the upper is clamped upon the wipers by the members 18 and the margin at the opposite ends of the tip seam is gripped by theopposite pairs of gripper jaws 24,26. As the form lOis' moved down wardly, it bendsthe intermediate portion of the upper out of the plane in which it is first presented, while clamping .itupon the toe rest 28 and depressing the latter, thus exerting an inward pull upon. the margin of the upper engaged by the members 18 and by the grippers. In response to this pull the nu' igine is permitted to slip between the members 18 and the wipers as the form is depressed within the toe band .12, but the grippers hold the margin with an unslipping grip and are themselves swung inwardly toward the form against the resistance o'l their springs 38 in response to the pull of the upper upon them. In this in; ward movement the grippers, while preventing uncontrolled shifting of themargin of the upper lengthwise of the form, effect a definite rearward displacement of the gripped margin to an extent depending upon how they are initially adjusted. This contracts the margin of the upperabout the end or" the form and thus assists 1n avoldlng the presence of prominent wrinkles when the margin is wiped inwardly by the wipers 14- and is molded into a flange adapted for attachment to the rib of an insole. The grippers maintain their grip on the upper until after the wipers have begun their inward movement and have arrived, for example, at the point illustrated in Fig. 5 where they are about to press the margin of the up per into the angular groove 16 in the form. Substantially at this point in the cycle of the machine themargin ofthe upper is released by the grippers and the clamp members.

The extent of the rearward. displacement, ii any, which it is thus found feasible or desirable to impart to the margin of the'upper at either or both ends of the tip seam will depend upon various conditions, and more especially upon the style of the shoe and the corresponding shape of the toe form. The construction shown issuch that each gripper may be readily adjusted indehend ently to meet varying conditions, and once adjusted for any particular style and size of too, it will produce uniform results in operating upon all uppers of that style and size. I

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

1. In a machine of the class described, the combination with means for molding the toe portion of an upper over a form, of grippers arran ed to grip the margin of the upper respectively at the opposite sides of the form substantially at the ends of the tip seam, said grippers being movable inwardly toward the form while maintaining their grip on the upper as the upper is shaped over the form, and means -for direct ing the inward movement of one at least of said grippers in apath inclined toward the rear end of the form.

2. In a machine of the class described, the combination with means to'rmolding the toe portion of an upper, oil the last, over a form, of grippers arranged to grip themargin of the upper respectively at the opposite sides of the form substantially at the ends of the tip seam, said grippers being movable inwardly toward the form while maintain ingtheir grip on the upper as the upper is shaped over the form, and means for directing the inward movements of said grippers in paths inclined toward the rear end of the form in different degrees at the opposite sides of the form respectively. p

3. In a machine oit the class described, the combination with means for molding the toe portion of an upper over a form, comprising devices for, wiping the upper over the end and the sides of theform and for thereaftershaping its margin to produce.

a flange adapted for attachment, to an insale, of grippers arranged to grip the margin oi the upper respectively at the opposite sides of the form, said grippers being movable inwardly toward the form in response to the pull of the upper thereon in the upper-molding operation while maintaining their grip on the upper to control the position of its margin, and means for directing the inward movement of one at least of said grippers in a path inclined toward the rear end of the form to effect a de'tinite rearward displacement of the gripped margin of the upper.

4. In a machine oi. the class described, the combination with means for shaping the toe portion of an upper over a form, ot' grippers arranged to grip the margin oi? the upper respectively at the opposite sides of the form, said grippers being movable inwardly toward the form while maintaining their grip on the upper in the uppershaping operation, and means for directing the in ard movements of said grippers in paths inclined toward the rear end ot the form in such degree to cause the gripper at the inner side oi": the toe to have a greater component of rearward movement than the gripper at the other side of the toe.

5. In a machine of the class described, the combination with means for clamping the margin of the toe portion of an upper, oil the last, outspread substantially in a plane, and a form movable relatively to said clamping means to mold the upper, of grippers arranged to grip the margin of the upper at the rear oLt said clamping means substantially at the ends of the tip seam, said grippers being movable inwardly toward the form in response to the pull of the upper thereon in the upper-molding movement of the term, and meanstor directingthe movement of one at least of said grippers in a path inclined toward the rear end of the form.

(3. In a machine of the class described, the combination with means for molding the'toe portion ot an upper, oil the last, over a form, including means for wiping its margin inwardly over the form to produce a flange adaptedtor attachment to an insole, 0t grippers arranged to grip the margin of the upper substantially at the ends of the tip seam to control the ends of the tip scam in the molding operation, said grippers being movable inwardly toward the form while maintaining; their grip on the upper, and

means for directing the movement'ot' one at least oi? said grippers m a path inclined toward the rear end of the term.

7. In a machine of the class described, the combination with means for molding the toe portion of an upper, off the last, over a form to give it substantially the shape desired for the finished shoe, of means for gripping the margin of the upper to control it during the molding operation and for imparting to the gripped margin, at least at one side of the form, a movement rearwardly from the toe end of the form to assist in avoiding the presence of objectionable wrinkles about the end of the form.

8. In a machine of the class described, the combination with means tor molding the toe portion oi an upper, ed the last, over a form, of grippers arranged to grip the margin of the upper respectively at the opposite sides of the form, said grippers being movable inwardly toward the form while maintaining their grip on the upper in the upper-molding operation, and means for so controlling said grippers as to cause the gripper at one side of the form to have a component of movement rearwardly from the toe end of the form and to cause the gripper at the other side to operate without any component of rearward movement.

9. In a machine of the class described, the combination with means for molding the toe portion of an upper over a form, of grippers arranged to grip the margin of the upper at the opposite sides of the form substantially at the ends of the tip seam, said grippers being movable inwardly toward the form in the upper-molding operation while maintaining their grip on the upper to insure that the ends of the tip seam will be properly positioned after the upper has been molded, and one at least of said grippers being adjustable to vary the angular relation of its path of movement to the longitudinal median line of the form.

10. In a machine of the class described, the combination with means for molding the toe portion of an upper, off the last, over a form, of grippers arranged to grip the margin of the upper at the opposite sides of the form, said grippers being movable inwardly toward the form in the upper-molding operation, and each 01". said grippers being adjustable to move inwardly either with or without a component of movement rearwardly from the toe end of the form.

11. In a machine of the class described, the combination with means for molding the toe portion of an upper, oli the last, over a form, of grippers arranged to grip the margin of the upper at the opposite sides of the form substantially at the ends of the tip seam, said grippers being mounted for swinging movements inwardly toward the form, in response to the pull ot the upper thereon in the upper-molding operation, about axes extending generally lengthwise of the form, and each of said grippers being adjustable to vary the angular relation of its axis to the longitudinal median line of the -form.

12. In a machine of the class described, the combination with means for clamping the margin of the toe portion of an upper outspread substantially in a plane, and a form movable relatively to said clamping means to shape the upper, of grippers arranged to grip the margin 01" the upper substantially in said plane at the rear of said clamping means, said grippers being movable inwardly toward the form in response to the pull of the upper thereon in the up- ERIC A. HOLMGREN.

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