US3082447A - Upper wiping and trimming means - Google Patents

Description

March 26, 1963 w. A. VORNBERGER 3,

UPPER WIPING AND TRIMMING MEANS Filed June 2, 1961 s Sheets-Sheet 1 I N V EN TOR. Wa/fer A. l ornberger BAY I WW A 77") March 26, 1963 w. A. VORNBERGER 3,

UPPER WIPING AND TRIMMING MEANS I Filed June 2, 1961 3 Sheets-Sheet 2 FIG-3 March 26, 1963 w. A. VORNBERGER 7 UPPER WIPING AND TRIMMING MEANS Filed June 2, 1961 3 Sheets-Sheet 3 nil-n- United States Patent 3,082,447 UPPER WIHWG AND TRIMMING MEANS Walter A. Vornbcrger, Medford, Mass, assignor to Jacob S. Kamhorian, Newton, Mass. Filed June 2, 1961, Ser. No. 114,456 3 Claims. (Cl. 127.1)

In lasting pointed toe shoes with machines such as that shown in Patent No. 3,011,186, granted December 5, 1961 or pending application Serial No. 100,979 filed April 5, 1961, the wipers, in moving across the last to wipe the lasting margin of the upper down upon the insole, tend to crowd the lasting margin adjacent the toe and form pleats in the upper. Stress areas are formed at the pleats which may cause cracking of the upper leather as the wipers move across the insole. In addition, the pleats are undesirable and must be removed before the lasted shoe can undergo an outsole laying operation.

In order to overcome the above cited objections, the instant invention has been developed. The invention comprises a lasting device that includes a plate upon which wipers having divergent, shoe embracing, wiping surfaces are swingably mounted. A trimming knife is mounted between the wipers on the line of symmetry of the wipers. A drive block, movable at a predetermined forward speed, is connected to the plate so that the plate moves forwardly at a slower speed than the wipers. The wipers are connected to the block to cause the wipers to swing inwardly at the same time as they are moved forwardly by the plate, and a connection is provided between the knife and the block to project the knife forwardly of the wiping surfaces at a speed intermediate the speed of the block and the speed of the plate concomitantly with the inward swinging movement of the wipers.

Reference is now made to the accompanying drawings wherein:

FIG. 1 is a partially sectional side elevation of -a shoe support;

P16. 2 is a plan view of the wipers and knife and the actuating means therefor with the wipers and knife in retracted position;

FIG. 3 is a View similar to FIG. 2 showing the wipers and knife in forward position;

FIG. 4 is a section taken along the line 4-4 of FIG. 1; and

PEG. 5 is a diagrammatic showing of the wipers and knife as they engage the shoe upper.

The machine comprises a shoe support, wipers and driving means for the wipers. The support and wiper driving means correspond substantially in form to that disclosed in the aforesaid Patent No. 3,011,186. The machine includes a frame (FIG. 1). A carriage 12 is slidably mounted on the frame for heightwise movement relative to the frame. This is accomplished by heightwise movement of a sleeve 14, supported in a vertical position on the frame 10 by brackets 16 and 18. The carriage is fastened to the sleeve by brackets 20 and 22 and a pair of collars 24 and 26 are rigidly connected to the sleeve above and below the bracket 20 to provide for movement of the carriage with the sleeve. A fluid 0per-ated motor 28, having a piston rod 30 connected to the lower end of the sleeve, provides for eifecting heightwise movement of the sleeve v14 and hence the carriage 12. The sleeve 14 supports a toe post 32 upon which is mounted a toe rest 34.

A toe clamp 36, for clamping a last 38 having a shoe I upper 40 and insole 42 thereon against the toe'rest 34, is slidably mounted in the carriage 12 for movement heightwise of the carriage by being connected to a plate 44 which is slidably mounted in a guideway 46 secured to the carriage 12. The plate 44 is connected to the piston Patented Mar. 26, 1953 ice rod 48 of a fluid actuated motor 50 mounted on the carriage 12. Thus, actuation of the motor 50' to raise or lower the piston rod 48 causes a corresponding raising or lowering of the toe clamp 36.

A heel clamp 52 engageable with the heel end of the last is slidably mounted for horizontal movement at the top of the carriage 12. The heel clamp, comprising a pair of divergent jaws 54 adapted to engage the heel end of the last 38 and upper 40, is connected through a post 56 to a bracket 58. The bracket 58 is connected to the piston rod 60' of a fluid actuated motor 62, so that actuation of the motor 62 to move the piston rod 60 causes a cor-responding movement of the heel clamp 52 toward or away from the heel end of the last. A fluid actuated motor 64 is mounted on the carriage 12 and drives a latch 66 into engagement with a toothed bar 68 on the heel clamp 52 to lock the heel clamp in clamped position.

The frame 10 includes a block 70 upon which is slidably mounted a wiper supporting plate 72. The plate 72 supports wiper holding cam plates 74 containing recesses at their forward ends in which are secured wiper blades 76. The cam plates 74 have arcuate cam slots 78 which engage pins 80 fixed to the subjacent plate 72 for controlling the movement of the cam plates and hence movement of the wiper blades to close them about the toe of the shoe. The forward ends of a pair of wiper actuating links -82 are pivotally connected to the cam plates. The rear ends of the links 82 are pivotally connected to a block 84 slidable in a slot 86 in the plate 72. The block 84 is connected by way of a coupling 88, at its rear end, to a piston rod 90 projecting forwardly from a fluid actuated motor 92 mounted in the frame 10.

The coupling 88 has pivotally connected thereto a pair of short links 94 which extend rearwardly and to the rear ends of which are pivotally connected a pair of laterally extending levers 96, which in turn are pivotally connected intermediate their ends to the plate 72 by pivots 98. The outermost ends of the levers 96 are pivotally connected at 100 to links 102, the rear ends of which are pivotally connected to pivots 104. The pivots 104 are fixed in slots 106 in the manner described in the aforesaid Patent No. 3,01 1,-186.

The wipers 76, in their retracted FIG. 2 position have abutting surfaces 108, and divergent surfaces 110 which act to engage the lasting margin of the upper and wipe it down against the insole during the lasting operation. Grooves 112 are provided in the contiguous surfaces of the wiper cams 74 and the abutting and divergent surfaces of the wipers, the grooves being located approximately halfway through the thickness of the wiper cams and wipers. A knife 114 is slidably mounted in the grooves 112 and has a sharpened cutting edge at its forward end. The rearward end of the knife is connected to a knife holder 116 which has a toggle pin 11$ extending upwardly thereof. A pair of knife actuating, toggle links 120 are each pivotally connected at one end to a link 82 and are pivoted at their opposite end to the toggle pin 118. The knife extends through a slot in the knife holder and is forked at its rearward end. A screw 122 is threaded into the holder 116 between the prongs of the fork and has a head bearing against the prongs to clamp the knife against the holder 116. By loosening the screw 122, the knife may be shifted lengthwiseto a desired position after which the-screw may be tightened to clamp the knife in place on the knife holder.

With the wipers and knife in their retracted position as seen in FIG. 2, and the carriage 12 in an elevated position, the last 38 with the upper 40 and insole 42 thereon is placed on the toe rest 34. The motor 50 is actuated to lower the toe clamp 36 against the insole to clamp the last and shoe between the toe clamp and the toe rest. The

motor 62 is actuated to press the heel clamp 52 against the heel end of the last and the motor 64 is actuated to lock the heel clamp. The motor 28 is then actuated to lower the carriage 12 an amount sufficient to bring the upwardly facing surface of the insole below the bottom surfaces of the wipers an amount substantially equal to the thickness of the lasting margin 124 of the upper 40. At this time the lasting margin is upstanding from the point of the last and from the'sides of the last adjacent the point of the last (FIG. 1). Adhesive may now be applied into the angle formed by the lasting margin and insole to bond the lasting margin to the insole during the subsequent wiping operation. Alternatively, the shoe upper may be precemented with adhesive that becomes effective during the pressure created during wiping. It is also within the purview of the invention to use other conventional attaching means such as tacks or staples to secure the wiper margin to the insole.

The motor 92 is now actuated to move the piston rod 90 and block 88 forwardly at a predetermined speed. Movement of the block, through the linkage comprising members 94, 96, 98, 100, 102 and 134, causes the plate 72 and the wipefs 76 supported on the plate to move forwardly at a slower speed than theblock. Concomitantly with the forward movement of the plate 72 and the wipers 7 6, the wipers are caused to swing toward each other about the center of curvature of the slots 78 by the links 82 thereby causing the divergent wiper surfaces 110 to move across the edges of the last and wipe or fold the lasting margin 124 down against the insole 42.

When making pointed toe shoes on lasts havinga relatively sharp point at their toe ends, the wiping operation tends to cause the upper stock to bunch up and form pleats adjacent the point of the last between the converging wiper surfaces 110 as indicated at 126 in FIG. 5. To relieve the stresses formed by the pleats and trim some or all of the pleated material, the forward movement of the block 88, through the linkage formed by members 82, 120 and 118 causes the knife 114 to move along the line of symmetry ofthe wipers from an initial position rearward of the surfaces 119 and of the forward end of the sur faces 108 as indicated in FIG. 2 to a final position into the angle formed by the surfaces 110 as indicated in FIGS. 3 and 5. The knife is moved forwardly at a faster speed than the plate 72 and at a slower speed than the block 38 so that the knife is projected forwardly of the wiper surfaces 110 shortly after the surfaces 119 have moved over the edges of the last and have started to form the pleats 126. By having the knife move slower than the block 82, it moves at a speed slow enough to efficiently cut the upper stock as it is being formed into pleats and the knife has a relatively'short stroke so that it does not have along unsupported span that could cut into the insole or snap during the application of the overwiping andbedding pressure described below.

As the wipers start their forward and inward movement, the motor 28 is actuated to apply an upward force by the toe rest 34 against the last to thereby provide an overwiping pressure between the bottom of the last and the upwardly facing surfaces of the lasting margin and insole during the forward and inward movementof the wipers. After the wipers have completed their movement, an increased upward force may be applied by the motor 28 to provide a bedding pressure between the wiper bottoms" and the lasted margin.

After the completion of the wiping operation, the motor 28 is actuated to lower the last and shoe, the motor 92 is actuated to retract the wipersand knife, the motor 46 is actuated to disengage the toe clamp 36 from the shoe, the

' motors, 64 and 62are'actuated to disengage the heel clamp to v 52 from the last and shoe and the motor 2$is actuated to raise the last and shoeto their initial position.- The lasted shoe can how be removed from the machine.

It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications and equivalents falling within the scope of the appended claims.

I claim:

1. In a lasting machine, wiping and trimming means comprising: a wiper supporting plate; a pair of shoe end embracing wipers, having'divergent wiping surfaces, symmetrically mounted on said plate for swinging movement; a knife mounted between the wipers on the line of symmetry of the wipers; a drive block; drive means connected to the drive block for driving it forwardly at a first speed; first joining means operatively connecting the block and the plate to move the plate forwardly at a second speed that is less than the first speed in response to movement of the block at said first speed; second joining means connecting the wipers and the block operative to swing the divergent surfaces of the wipers inwardly in response to forward movement of the block; and third joining means connecting the knife and the block operative to project the knife forwardly of the divergent wiping surfaces at a third speed that is intermediate said first and second speeds in response to movement of the block at said first speed.

In a lasting machine, wiping and trimming means comprising: a wiper supporting plate; a pair of shoe end embracing wipers, having divergent wiping surfaces, mounted on said plate for swinging movement; a knife mounted between the wipers on the line of symmetry of the wipers; a drive block; drive means connected to the drive block for driving it forwardly; a wiper actuating link extending from each wiper to the drive block, each of said wiper actuating links being pivotally connected at one end to a wiper and at the other end to the drive block, whereby forward movement of the drive block effects an inward swinging of the divergent wiping surfaces; and a knife actuating link extending from each wiper actuating link to said knife, each of said knife actuating links being pivotally connected at one end to a wiper actuating link and at the other end to the knife, whereby the knife is projected forwardly of the divergent wiper surfaces concomitantly with the inward movement of said wiping surfaces.

7 3. In a lasting machine, wiping and trimming means comprising: a wiper supporting plate; a pair of shoe end embracing wipers, having divergent wiping surfaces, symmetrically mounted on said plate for swinging movement; a knife mounted between the wipers on the line of symmetry of the wipers; a drive block; drive means connected to the drive block for driving it forwardly at a first speed; joining means operatively connecting the block and plate to move the plate forwardly at a second speed that is less than the first speed in response to movement of said block at said first speed; a wiper actuating link extending from each wiper to the-drive block, each of said wiper actuating links being pivotally connected at one end to a wiper and at the other end to the drive block, whereby forward movement of the drive block effects an inward swinging of the divergent wiping surfaces; and a knife actuating linkextending from each wiper actuating link to said knife, each of said knife actuating links being pivotallyconnected at one end to a wiper actuating link and at the other end to the knife, whereby the knife'is projected forwardly of the divergent wiping surfaces at a References Cited in the file of this patent UNITED STATES PATENTS 469,972 Morey -Q Mar. 1, 1892 1,382,006 Lund June 21, 1921

Claims (1)

1. IN A LASTING MACHINE, WIPING AND TRIMMING MEANS COMPRISING: A WIPER SUPPORTING PLATE; A PAIR OF SHOE END EMBRACING WIPERS, HAVING DIVERGENT WIPING SURFACES, SYMMETRICALLY MOUNTED ON SAID PLATE FOR SWINGING MOVEMENT; A KNIFE MOUNTED BETWEEN THE WIPERS ON THE LINE OF SYMMETRY OF THE WIPERS; A DRIVE BLOCK; DRIVE MEANS CONNECTED TO THE DRIVE BLOCK FOR DRIVING IT FORWARDLY AT A FIRST SPEED; FIRST JOINING MEANS OPERATIVELY CONNECTING THE BLOCK AND THE PLATE TO MOVE THE PLATE FORWARDLY AT A SECOND SPEED THAT IS LESS THAN THE FIRST SPEED IN RESPONSE TO MOVEMENT OF THE BLOCK AT SAID FIRST SPEED; SECOND JOINING MEANS CONNECTING THE WIPERS AND THE BLOCK OPERATIVE TO SWING THE DIVERGENT SURFACES OF THE WIPERS INWARDLY IN RESPONSE TO FORWARD MOVEMENT OF THE BLOCK; AND THIRD JOINING MEANS CONNECTING THE KNIFE AND THE BLOCK OPERATIVE TO PROJECT THE KNIFE FORWARDLY OF THE DIVERGENT WIPING SURFACES AT A THIRD SPEED THAT IS INTERMEDIATE SAID FIRST AND SECOND SPEEDS IN RESPONSE TO MOVEMENT OF THE BLOCK AT SAID FIRST SPEED.

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