US2331911A - Welt butting and tacking machine - Google Patents

Description

Oct. 19, 1943. E A HQLMGR N 2,331,911

WELT BUTTING PACKING MACHINE Filed Sept. 2, 1941 2 Sheets-Sheet 1 fivvavrum ILJ IL ya 'ajMi-M 943. 1-; A. HOLMGREN 2,331,911

WELT BUT'I'ING AND TACKING MACHINE Fil ed Sept. 2, 1941 2 Sheets-Sheet 2 JL S NVE/VTUQ 2W. aAAM M bJr-H MM Patented Oct. 19, 1943 W'ELT BUTTING- AND TACKING MA'GHINE Eric A. Holmgren, Beverly, Mass, assignor to United Shoe Machinery Corporation, Flemingten,N. .L, a corporation of New Jersey- Application September 2, 1943,. Serial No. 409,254

12 Claims.

This invention relatestowelt. butting and tack ing, machines. and particularly to improvements in machines of this kind for facilitating the welt butting and tacking, operations when performed on shoes providedwith so-called two-piece. storm welts.

Two-piece storm welts, sometimes referred to as bi-welts, comprise a welt strip and a separate bead portion which, during the welt-mg operation, becomes secured to the welt. strip to form a seal of' caulking bead between the welt and upper in the inseam crease. Toimprove the appearance of the joint. between the. ends of the two-piece welt and the heel seat of the shoe it has been proposed to. butt the Welt strip. only and to bend the. unsecur d and unsevered ends of the bead portion, which extends rearwardly beyond the butted ends. of the welt strip, inwardly toward the middle of the shoe bottom where they are secured in place by tacks. The machine disclosed in United States Letters Patent No. 1,747,533,. ranted February 18, 1930, on an application, of Fred L. MacKenzie, is provided with fixed means for deflecting the. ends of the. bead portion of a two.- pi'ece welt inwardly when the shoe is placed in the machine to accomplish this result.

It. is an object of this, invention to provide, in a welt butting. and tacking machine, improved means for handl ng two-piece. storm welt in a novel manner and so that the unsecured ends of the bead portions are not. severed but are positively moved inwardly, towards the middle. of the shoe bottom, during the. operation of the machine and after the butting. of the welt strips. To this end there are provided, as a feature of this invention, novel deflecting means, associated with the crease findersand' Welt butting, anvils, which are arranged to engage the bead portions of the welt beneath the anvils and which. are movable, during the operation ofthe machine and subsequently to the welt butting operation, to bend the unsevered' ends of the bead portions inwardly toward the middle of the shoe bottom in position for securement to the shoe bottom by tacks during the tacking operation, More particularly, each deflecting means comprises a movable deflector, arranged between a crease finder and an anvil and having a portion extending inwardly toward the shoe and rearwardly beneath the anvil for engagement with an unsecured end of the bead portion of a two-piece welt, which is operable to bend the end of the bead portion inwardly of the shoe.

It. will be understood, in handling two-piece storm welt in the above manner, that the. ends of the. welt strip are supported on top of the welt buttinganvils while the ends of the unsecuredbead portion are placed beneath the anvils so as not to be severed in the Welt butting operation. When set. to receive a shoe of any particular size, the

crease finder assemblies of welt butting machines are usually positioned by some form of adjusting means so as to be separated just enough for the crease finders to enter the welt crease on the opposite sides of the shoe, with th anvil's of the assemblies extending inwardly beyond and be-- ne'ath the welt, when the shoe is presented to the machine. Ordinarily, the shoe. is introduced by inserting it rearwardly into the machine, sliding the anvils beneath the welt ends. With twopiece storm welts it is difiicult to do this so that the unsecured ends of the bead portion are located beneath, and the welt strips positioned on top of, the anvil's.

Accordingly, a further feature of this invention resides in the provision in a welt butting machine of means for moving the crease finder assemblies out of their adjusted positions to facilitate the introduction of shoes having two-piece welts and for thereafter returning them to their original adjusted positions. More specifically, this means comprises a toggle mechanism associated with themeans for adjusting and operating the crease finder assemblies of a welt butting machine which is operable quickly to separate the crease finder assemblies, to facilitate the introduction of twopiece welt work, and which is thereafter operable to return the assemblies to their original position without disturbing the setting of the adjusting means.

These and other objects and features of the invention will become apparent from the following detailed description of the preferred embodiment of the invention, disclosed in the accompanying drawings, and will be pointed out in the claims.

In the. drawings,

Fig. l is a plan view of a portion of a welt butting machine embodying the features of this invention, parts; of the machine being broken away, or omitted, to simplify the disclosure;

Fig. 2' is an end elevation of a portion of the mechanism shown in Fig, 1;-

' Figs. 3, 45 and 5 are enlarged views of the crease finder assemblies shown in Fig. 1, but showing the parts in several different positions assumed at various stages in the operation of the machine.

The illustrative embodiments of the features. of this invention are herein shown applied to a welt butting and tacking machine of the type disclosed in the patents to Holmgren Nos. 2,202,005 and beneath the anvils 91, 91.

2,206,897. As will be understood from the disclosures of these patents, machines of this kind are provided with means for supporting the end portions of a welt during the butting operation, which means include crease finder assemblies that are moved inwardly by power-operated means to tighten the upper on the last prior to the welt tacking operation. The crease finder assemblies include crease finders and anvils and, in accordance with the teachings of Patent No. 2,206,897, the crease finder assemblies of the herein illustrated machine also have deflectors which are movable to bend end portions of the welt inwardly of the shoe bottom. In the machines of the mentioned patents, and in the machine herein illustrated, the crease finder assemblies are mounted on swinging brackets and are connected to heads which carry the tacking and pounding instrumentalities and which are opened and closed by the power operated means during the operation of the machine. With the differences to be noted below, the mechanism for opening and closing the heads, which carry the tacking and pounding mechanism in the machine herein illustrated, is similar to that provided in the machines of these two patents, and shown in Fig. 23 of Patent No. 2,202,005, while the crease finder assemblies and their operating mechanisms are similar to those shown and described in Patent No. 2,206,897.

Referring to the drawings, the crease finder assemblies include blocks 68, 58 carried by swinging brackets 10, ID in which are mounted deflectors 60, 60, anvils 91, 91, and crease finders I00, I00. Reference characters similar to those used in Patent No. 2,206,897 are employed to designate these corresponding parts in the several figures of the drawings, and reference may be made to pages 3 and 4 of that patent for a more detailed description of the construction and mode of operation of these elements. Portions of levers I32, I32, for retracting the anvils, and also of shafts 90, 90, for operating the deflectors 50, 50 are also shown in Fig. 1.

The herein illustrated deflectors 60, 50, however, are novel, and as will be seen from Fig. 3, comprise portions 60a, 60a, which extend inwardly These inwardly extending portions have downwardly and outwardly beveled operating faces 60b, 60b which converge slightly in an inward direction, as shown. The deflectors are also provided with concave surfaces 600, 500, the purpose of which will presently appear.

The operation of the improved deflectors for bending in the unsecured ends of the bead portion of a two-piece storm welt is as follows:

Fig. 1 shows a shoe provided with two-piece storm welt in position in the machine prior to the welt butting and tacking operation. Each end of the welt W is over an anvil 91 and the crease finders I05, I are in the welt creases on opposite sides of the shoe. The unsecured ends of the bead portion b, b of the two-piece welt are, however, positioned beneath the anvils and, as shown, are deflected inwardly a slight amount by the operating faces 60b, 60b of the deflectors. In order to facilitate introduction of bi-welt work into the machine the crease finder assemblies are separated from their usual adjusted position, by mechanism which constitutes another feature of this invention, to the open position shown in Fig. 3 where the anvil on one side is inserted between the welt W and its bead portion 1). Now,

as the crease finders are returned to the adjusted position of Fig. l, the anvil on the other side is likewise inserted between the welt W and bead portion b at the opposite side of the shoe.

When the machine is started, its butting knives, not shown, butt the welt as shown at B, B, Fig. 4, and the anvils 91, 91 are retracted. The bead portions 1), b, however, being beneath the anvils, are not butted, but, as the deflectors 60, 50 are moved in by the mechanism described, and in the manner explained in Patent No. 2,206,897, are bent into the positions shown in Figs. 4 and 5, first by surfaces 60b, 60b, and finally by corners between these surfaces and the concave surfaces 60c, 600. The tack nozzles of the machine, not shown, which form part of the welt packing mechanism of the machine, now descend and occupy positions indicated in broken outline at III I1 I, and, as they are pressed against the welt and inseam, hold the inturned ends of the bead portions while the crease finder assemblies are moved back to the position shown in Fig. 5 prior to the tacking and pounding operation which now follows. Preferably, the tacker nozzles I'II, I'll, see Patent No. 2,206,897, are adjusted so that the tacks t, t pass through the inturned ends of the bead portions 1), b, as shown in Fig. 5.

As in the machines of the mentioned patents, th crease finder brackets I0 are connected to tacker heads I48, I48 and hence partake of the movements of these heads. These movements are effected by a lever 492 (Fig. 1), operated by means of a cam, not shown, operating through the following mechanism. This lever is keyed to a vertical shaft 494 and has an arm 5I8 adjacent the outer end of which is swiveled a rod 520. Beneath the lever 492 and freely rotatable on the shaft is a lever 500 having an arm 542. The rod passes through a block 526, swiveled to the end of the arm 542, and a compression spring 522 is interposed between one face of this block and an adjustable abutment 524 on the opposite end of the rod. Angular movements of the arm 5I8 are thus transmitted to the lever 500 through the spring 522. Beneath the lever 500 is a third arm 532 and this is likewise freely rotatable on the shaft 494. The normal position of this arm is fixed by a link 554 pivoted to the frame and having a slotted end which embraces a pin 552 in the arm. A spring-pressed plunger 560 urges the pin against the end of an adjusting screw 564 by means of which the normal position of the arm 532 may be varied. A pawl 548 is pivoted to the arm 532, and a spring-pressed plunger 512 swings this pawl toward ratchet teeth 546 out on the arm 542, engagement of the pawl with these teeth being prevented, when the parts are in the positions shown, by a pin 565, carried by arm 5I8, and an extension 510 of the pawl.

The arm 500 is connected to the left-hand head I48 by means of an adjusting screw 506 and a toggle mechanism about to be described, and the heads I48, I48 are connected for conjoint opening and closing movements by means of links 504, 5I2 and geared levers 580 and 508. The operation of the opening and closing mechanism which has just been described is the same as that shown in Patent No. 2,202,005, see Fig. 23, and pages 8 and 9 of that specification, and is briefly as follows: In Fig. 1, the heads, and also the crease finder assemblies which are connected to the heads, as explained in the patent just mentioned, are being held in open position, as set by suitable adjustment of the screw 506, by means of springs, not shown. Initial angularmovement oi the lever 492 111 a counterclockwisedirection, by means of the operating carn not shown, is transmitted to arm 563-; and also to the brackets and crease finder assemblies, through the spring 522, until the pin 556' moves past the end of extension 570, whereupon the pawl 54% moves into engagement with teeth 545 and a rigid connection betwen lever M2, and arm 55% is effected. At this time, the arm: 5-32 isbeing moved in a counterclockwise direction by engagement of an abutment surface 5'36 of the arm 5E8; As the operating cam completes a single turn the parts are returned to the positions showmaspring-pressed plrmger SHE striking against a boss 6'62 on the frame to cushion the stopping of bracket movement, During: this return movement the pin 556 releasesthe pawl ess from: engagement with the teeth 586.

Referring now to the toggle mechanism, which, as a. feature of this invention, is interposed between the arm 508-, or more specifically the adjusting screw 5%, and the arm 5&2 of the bracket I48, the screw 5525 has a fixed collar 2&2 and passes freely through a block 205' (Fig; 1). Between this collar and a faceon the block. there is a. grooved. sleeve 2% also fixed to: the shaft and held. against this face by means of a compression spring: 295 interposed between a collar 2% and the opposite face of the block. A: spring presse'd pllmger 263 cooperates with the grooved sleeve to hold: th screw 5%: in any adjusted. position to which it may be moved by a hand wheel, not shown. Formed integrally with the block are two oppositelyextending studs 2H] and H2? (Fig. 2)- Aahooked 2M (Fig I) is keyed to stud 212, andabover this am. is a bushing 21%, likewise keyed to this stud, on which is jburnaled one end of a link 21s. A nut 22% holds these parts on the stud, and a pin 222. connects. theother end of this link. to the bracket arm. 5&2; Ewo toggle links 22%. connected by a pin 22%,. extend between the end of the hooked arm: 21% and the outer end of the bracket arm Ell-2; to which they are pivoted. by means or pins 239;. 2:32. A grasshopper spring 23% holds the toggle straightened, as shown, with anabutment surface 236 on link 22% bearing against an abutment surface 238: on the hooked arm. EM. Journaled on the downwars 1 projecting. stud 21d i-san angle lever comprising a forwardly extending handle 2&0 and an arm- 242 at right angles thereto. The link 226 has an arm 2M extending at right angles there'- from, and a link 2% connects this arm to the arm 252.

With this toggle mechanism it is possible to open the brackets a predetermined amount, indicated by the angle on, Fig. 1, by swinging the handle 2&0 from the full-line position to the broken-line position shown in Fig. 1, the toggle formed by links 224 and 225 being broken by the swinging of link 22%; through link 246, and the parts moving to the broken-line positions shown. As already noted, the crease finder assemblies move with the brackets and hence are opened a corresponding amount, as indicated by the angle oz in Fig. 3. With the crease finder assemblies thus separated the operator is enabled easily to insert the one anvil beneath the welt and over the bi-welt strip and then as he brings the crease finder assemblies together again, by moving the handle 248 to the left, insertion of the other anvil beneath the welt and over the bi-welt strip at the other side of the shoe is effected, the crease finders now being returned to: proper. position: in the welt crease for the particular size shoe being handled; This separating of. the crease finder assemblies. is efiected without disturbing the setting of the crease finders as made by the adjusting screw 5% and the spring 234 assuresthat the toggle is always returned. to its straighten-ed condition. when the operator releases the handle 2 2 Having described my invention, what I claim as'new and desire to secure by Letters Patent of the United States is:

1... In a welt butting and tacking machine for operating on a shoe having a two-piece storm welt comprising a welt'stripand a separate bead portion, the combination of means for supporting the ends of the: welt strip only for the butting operation, and movable means operable after the butting of the welt strips for bending the unsevered ends of the separate bead portion, which extend rearwardly" beyond the butted ends of the welt, inwardly toward the middle of the shoe bottom;

2; In a weitbutting and tacking machine for 35 operating on ashoe having a two pi'ece storm welt'comprising a welt strip and a separate bead portion, the combination of anvil's for supporting the ends of the welt s-triponly during the welt butting operation so that the unsecured ends. of the separate bead portion ofthe welt-are u-nsevered, and means associated with the anvils and movable during the operation of the machine for bending the unsevered and unsecured ends of the bead portion, which extend rearwardly beyond the butted ends of the welt, inwardly toward the middle of the shoe bottom.

3 In a weltbutting and tacking machine for operating on a shoe having a two-piece storm w'el'tcomprising a welt strip and a separate bead portion, the combination of anvils for supporting the ends oi" the welt strip during the welt butting operation so that the unsecured ends of the bead portion of the welt are unsevered, and I r deflectors having portions extending beneath the anvil's and movable after the welt butting operation for bending the unsevered ends of the bead portion inwardly toward the middle of the shoe bottom.

t. In a welt butting and tacking machine. for operating on a shoe having. a two-piece storm welt comprising. a welt strip and a separate bead portion, the combination of crease finders for engaging the welt crease on opposite sides of a shoe, anvi-ls for supporting. the ends ot the welt strip during the welt butting. operation so that the unsecured ends of the bead portion of the welt are unsevered, and deflectors arranged between said crease finders and said anvils and each having a portion extending inwardly toward the shoe and rearwardly beneath an anvil, said deflectors being movable during the operation of the machine for bending the unsevered ends of the bead portion inwardly toward the middle of the shoe bottom.

5. In a welt butting machine having a pair of crease finder assemblies, each including a crease finder, the combination of adjustable means for variably positioning the assemblies so that the crease finders will accommodate shoes of different sizes, and means for moving the assemblies out of adjusted position to separate the crease finders and for returning the assemblies and their crease finders to their original positions without disturbing the setting of said adjustable means.

'6. In a welt butting machine having a pair of crease finder assemblies, each including a crease finder, the combination of adjustable means for variably positioning the assemblies so that the crease finders will accommodate shoes of difierent sizes, and a toggle mechanism associated with said adjustable means for moving the assemblies out of adjusted position to separate the crease finders and for returning the assemblies and their crease finders to their original positions without disturbing the setting of said ad justable means.

7. In a welt butting machine having a pair of crease finder assemblies each including an anvil, a crease finder and a deflector extending beneath the anvil, the combination of adjustable means for variably positioning said assemblies so that the crease finders will accommodate shoes of different sizes, and manually operable means associated with the adjustable means for moving the assemblies out of adjusted position to separate the crease finders, thus to facilitate the introduction of shoes having two-piece storm welts into the machine with the unsecured ends of the bead portion of the welt beneath the anvils and in engagement with the deflectors, and for returning the assemblies and their crease finders to their original adjusted positions.

8. In a welt butting machine having a pair of crease finder assemblies, each including an anvil, a crease finder and a deflector extending beneath the anvil and movable during the operation of the machine for bending the ends of the bead portion of a two-piece storm welt inwardly of the shoe bottom, the combination of adustable means for variably positioning 'said assemblies so that the crease finders will accommodate shoes of different sizes, and a toggle mechanism associated with said adustable means for moving the assemblies out of adjusted position to separate the crease finders, thus to facilitate the introduction of shoes having twopiece storm welts into the machine with the unsecured ends of the bead portion of the welt beneath the anvils and in engagement with the deflectors and for returning the assemblies and their crease finders to their original adjusted positions.

9. In a welt butting machine having a pair of movable crease finder assemblies, the combination of power-operated means for moving said assemblies during the operation of the machine, adjustable means associated with the power-operated means for initially positioning said assemblies to accommodate different sized shoes,

and a toggle mechanism interposed between the adjustable means and the crease finder assemblies, said toggle mechanism being arranged to efiect a separation of the crease finder assemblies when it is broken and to return said assemblies to their original adjusted position when straightened.

10. In a welt butting machine having a pair of movable crease finder assemblies, the combination of power-operated means for moving said assemblies during the operation of the machine, an adjusting screw associated with the poweroperated means for initially positioning said assemblies, said adjusting screw being threaded to the power-operated means and having an opera tive connection with said assemblies including a toggle mechanism, manual means for breaking the toggle to effect a separation of the crease finder assemblies and for straightening the toggle to return the assemblies to their original adjusted position, cooperating stop means on the manual means and the toggle, and a spring normally holding said stop means in engagement and the toggle mechanism straightened.

11. In a welt butting machine having a pair of movable crease finder assemblies and a pair of movable tacker head brackets connected togather for conjoint opening and closing movements, the combination of a power-operated member for moving said brackets and said crease finder assemblies, means for connecting said power-operated member to one of the brackets comprising an adjusting screw and a variable length linkage, and manual means for varying the length of the linkage to effect a foreshortening of said connecting means without disturbing the setting of said adjusting screw.

12. In a welt butting machine having a pair of movable crease finder assemblies and a pair of movable tacker head brackets connected together for conjoint opening and closing movements, the combination of a power-operated arm for moving said brackets and said crease finder assemblies, means connecting said arm to one of the brackets comprising an adjusting screw and a toggle mechanism, said screw being threaded into said arm at one end and secured to one link of the toggle at its other end, an opcrating handle for breaking the toggle mechanism to effect a foreshortening of said connecting means without disturbing the setting of the adjusting screw, and means for normally holding said toggle mechanism straightened.

ERIC A. HOLMGREIT.

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