US3070819A - Shoe conforming and wiper heating apparatus - Google Patents

Description

1963 H. L. DENT ETAL 3,070,819

SHOE CONFORMING AND WIPER HEATING APPARATUS Filed June 50, 1961 S Sheets-Sheet 1 INVENTORS HOP/y L. Dem y Dav/'0 M Thompson W/HM Arrr Jan. 1, 1963 H. DENT ETAL SHOE CONFORMING AND WIPER HEATING APPARATUS 5 Sheets-Sheet 2 Filed June 30, 1961 Jan. 1, 1963 DENT ETAL 3,070,819

SHOE CONFORMING AND WIPER HEATING APPARATUS Filed June 30, 1961 R 3 Sheets-Sheet 3 United States Patent Cfifice 8,870,819 Patented Jan. 1, 1963 3,070,819 SHUE CONFORMTNG AND WIPER HEATWG APPARATUS Harry 1.. Dent and David M. Thompson, Nashville, Tenn, assignors to Jacob S. Kamborian, West Newton, Mass. Filed June 30, 1961, Ser. No. 121,202 12 Claims. (Cl. 1212.4)

This invention relates to an apparatus for snugly conforming the upper of a shoe mounted on a last to the shape of the last prior to wiping the lasting margin of the upper against the shoe insole supported on the bottom of the last and to heating the wiping instrumentalities.

In copending application Serial No. 50,177 filed August 17, 1960, there is disclosed a pair of wipers mounted on wiper cams and a shoe conforming apparatus comprising a generally U-shaped yoke located below the wipers and wiper cams. A head is slidably mounted below the wipers and is yieldably urged forwardly by a spring. The bight of the yoke is engaged by the head and a pair of support arms extending alongside of and exteriorly of the yoke legs are pivotally connected at their rear ends to the head on opposite sides of the bight. The support arms are connected intermediate their ends to the yoke legs and the forward ends of the support arms are pivotally connected to rods, the rods in turn being pivotally mounted on the machine frame. Spring means are interposed between the frame and the forward ends of the support arms to yieldably urge the yoke legs inwardly of the yoke. In the above described device, downward movement of a shoe upper and insole, mounted on a last, through the yoke causes the yoke to be resiliently pressed against the last and causes the upper to snugly conform to the shape of the last.

An object of this invention is to provide, in a shoe conforming apparatus similar to the one described above, means for heating the wipers so that the heated wipers will iron the lasting margin of the upper as they press it down against the insole and press out any irregularities or pleats in the lasting margin. This object is carried out by providing a plate in the head below the wiper cams on the plane of symmetry of the wipers. The plate is urged by springs upwardly against the cams and has electric heating cartridges therein. The plate serves to heat both of the wiper cams and the wiper cams heat the wipers by conduction.

Reference is now made to the accompanying drawings wherein:

FIG. 1 is a side elevation partly in section of a toe lasting machine;

FIG. 2 is a plan view of the front of the machine with the cover removed showing the wipers, the wiper driving and FIG. 7 is a vertical section showing the relationship of the last, upper, insole, yoke legs and wipers.

Referring to FIGS. 1 and 2, the machine includes a pair of wiping units, each comprising a wiper 10 mounted in a wiper cam 12. The wiping units are symmetrically disposed about the longitudinal center line of the machine at its forward end and are pivotally connected by links 14 to a slide 16 slidably mounted for horizontal forward and rearward movement in the frame 18 of the machine. The wiper cams are slidable over a wiper support 20 fixed to the frame 18 and have cam slots 22 and 24 that are FIG. 6 is a section taken along the line- 66 of FIG. 5;

engageable with rolls 26 upstanding from the wiper support 20 whereby forward movement of the slide 16 causes a forward and inward movement of the wiping units in the manner disclosed in Patent No. 2,668,967. The slide =16 is connected through linkage 38 to the piston rod 40* of a fluid actuated motor 42. A shoe support, made substantially in accordance with the shoe support disclosed in the aforesaid Patent No. 2,668,967, comprising a toe rest 28 and a heel pin 30 mounted on a carriage 32, is located at the forward end of the frame 18 and is slidably guided on the frame for vertical movement. The carriage 32 is connected to the piston rod 34 of a fluid actuated motor 36.

A control mechanism similar to that disclosed is Patent No. 2,888,693 is provided to operate the motors 36 and 42 to thereby control the vertical movement of the shoe support and the horizontal movement of the wiping units. The control mechanism includes a control handle 44-, which when rotated about its horizontal axis, controls the motor 36 to raise and lower the shoe support, and, when swung in a horizontal plane, controls the motor 42 to move the wiping units forwardly and rearwardly. Reference is made to the aforesaid Patent No. 2,888,693 for a more detailed disclosure of the control mechanism.

The machine includes a flexible shoe conformer similar to that disclosed in the aforementioned copending application Serial No. 50,177 filed August 17, 1960. The conformer comprises a generally U-shaped yoke 46, made of a low coefficient of friction material such as Teflon, having a bight 48 positioned in the forward end of the frame and a pair of legs 50 extending forwardly of the bight on opposite sides of the bight.

A head 52 is slidably mounted for horizontal movement in gibs 53 forming part of a guideway 54 formed in the wiper support 28. The head 52 has a pair of ledges 56 at its forward end forming a recess 58 therebetween adapted to receive the yoke bight 48 (see FIG. 5). A bracket 60, positioned rearwardly of the head 52, is screwed to the gibs 53 by screws 62 and has a portion extending downwardly into the guideway 54. A stud 62 is threaded into the bracket 60. The stud extends rearwardly and terminates short of the frame 18. An opening 64 (FIG. 1) is provided in the frame in alignment with the stud through which :a tool may be inserted to rotate the stud and adjust its position in the bracket 60. A socket 66 is provided in the head 52 and a compression spring 68 extends from the socket 66 to a reduced portion 70 on the stud 62. The spring 68 serves to yieldably urge the head 52 forwardly along the guideway 54. A screw 72 threaded into a portion of the frame 18 is in abutting relation to the head 52 and thereby limits the extent the head may be moved along the guideway under the resilient force of the spring Supports 74 are rigidly secured to the opposite sides of the frame 18 at the forward end thereof and extend forwardly of the frame. An internally threaded sleeve '76 is pivotally connected to each support 74 for swinging movement about the vertically extending axis of a bearing 78. The bearings 78 extend upwardly from the sleeves 76 through the supports '74 and are connected to the supports by nuts 80 threaded onto the upper ends of the bearings 78.

A threaded shaft or screw 82 is threaded into each sleeve 76 and a knob 84 is rigidly connected to each screw 82. Each screw is hollow and slidably receives a rod 86 extending longitudinally therethrough. Adjusting nuts 88 are threaded to the outer ends of the rods 86 and bear against bearings 90 rotatably mounted on the rods 86. The bearings 90 in turn bear against the knobs 84. The inner end of each rod 86 is formed into a head 92 that extends between the jaws of a clevis 94. Each clevis 94 mit relative swinging movement of the rods 86 and the support arms 96 about the vertical axes of the pins 98. A compression spring 99 is mounted on each rod 86 and extends from each screw 82 to each head 92. The ends of the support arms 96 remote from the clevises 94 are pivotally connected to the ledges 56 of the head 52 by pins 100 so as to permit relative swinging movement between the support arms 96 and the head 52 about the vertical axes of the pins 100.

The bight 43 of the yoke is normally positioned in abutting relation to the base of the recess 58. Each yoke leg 50 is connected to its contiguous support arm 96 by flanges 102 connected to and extending inwardly from the yoke legs and received in elongated slots 104 provided in the yoke legs.

The machine, as described up to this point, substantially conforms to the disclosure of the aforesaid application Serial No. 50,177 filed August 17, 1960. It is desirable in such a machine to provide means to heat the wiping units. so that they will, in the lasting operation, iron the lasted upper material flat upon the insole and press down any creases or wrinkles that are created during lasting. The instant invention is concerned with a wiping unit heating device that may be mounted in the above described machine.

The heating unit comprises a plate 106, preferably made of a heat conductive material such as iron, located in a depression 108 in the upper surface of the head 52 rearwardly of the recess 58. The plate is connected to the head by a screw 110 extending through a bore 112 in the plate and threaded into the head. The screw has an enlargement 114 at its upper end that is located above a shelf 116 formed at the intersection of the bore 112 and a larger diameter counterbore 118 extending downwardly from the upper surface of the plate 106. A pair of compression springs 120, interposed between the head 52 and the plate 106, yieldably urge the plate upwardly to the extent permitted by the enlargement 114. The upper surface 122 of the plate has bevels 124 and 126 at its forward and rearward ends. The plate is heated by a pair of electric heating cartridges 128 located in holes in the plate. The cartridges are connected to a source of power, not shown, by wires 130.

The heated plate 106 is normally positioned beneath the wiper earns 12 with the springs 120 yieldably urging the plate against the cam undersurfaces to provide good heat conduction between the plate and the cams. The wipers 10, in turn, are heated by conduction from the wiper cams.

in operating the machine, the shoe conformer is adjusted to conform to the shape of the shoe that it is desired to last in the manner described in the aforesaid pending application Serial No. 50,177 filed August 17, 1960. The shoe support is initially located in an upper position and a last 132 (see FIG. 7) having a shoe upper 134 and an insole 136 mounted thereon is placed bottom-up on the shoe support with the toe of the last facing the bight of the yoke 46 and the shoulder 140 of the last overlapping the yoke. The motor 36 is then actuated to lower the shoe to a position where the upwardly facing surface of the insole 136 is substantially level with the undersurfaces of the wipers as indicated in FIG. 7. During this downward movement the yoke 46 yieldably engages the upper under the forces exerted by the springs 68 and 99 and snugly engages the upper. The yoke material is compressed during this downward movement and the head 52 and the support arms 96 may move outwardly of the yoke with swinging movement of the shoe conformer parts taking place about the axes of the bearings 78 and the pins 98 and 100 to enable the yoke to snugly engage the upper and cause the upper to conform to the shape of the last and the lasting margin 138 of the upper to extend upwardly of the insole 136.

After the shoe and last have completed their downward movement, adhesive may be applied in the angle formed between the upstanding lasting margin 138 and the insole 136 which will adhesively bond the lasting margin to the insole during the subsequent wiping operation. Alternately, precemented uppers may be used wherein the lasting margin has adhesive applied thereto prior to the insertion of the shoe in the machine, which adhesive is activated to bond the lasting margin to the insole under the pressure exerted by the wiper during their Wiping action. If desired, instead of adhesively bonding the lasting margin to the insole, after the lasting margin has been wiped down upon the insole it may be secured thereto by tacks, staples or other similar fastening means.

When the shoe and last have completed their downward movement, the shoe upper is yieldably clamped between the last and yoke as indicated in FIG. 7. The motor 42 is now actuated to move the wiping units forwardly and inwardly to cause the wipers 10 to wipe or fold the lasting margin down upon the insole. During the wiper movement, the motor 36 is actuated to provide an upward force of the shoe against the wipers to create an overlasting pressure against the wiper bottoms, and, at the completion of the wiping operation, this force may be increased to create a bedding pressure. At the completion of the wiping operation, the shoe support is lowered, the wipers are retracted to their initial position and the shoe support is then raised to its initial position.

The wiper cams 12 in their retracted position overlie the heated plate 106 as indicated in FIGS. 3 and 4 so that heat is supplied by conduction from the plate 106 to the wipers 10 by means of the wiper cams. The heated plate 106 is at all times located rearwardly of the leading edges 14?. of the wipers 10 with the screw 72 determining the forwardmost position of the plate. The yieldable upward force of the springs enables the plate 106 to bear against the wiper cams 12 during the movement of the wiper cams regardless of any irregularities in the surfaces of the plate and earns. Should the wiper cams in their forward movement move forwardly of the plate 106, the bevel 124 permits the cams to readily move back over the plate during their rearward movement. The bevel 126 permits the slide 16 to readily ride over the plate 106 during the forward stroke of the wipers should the slide move forwardly far enough to contact the plate. With this arrangement of the heated plate located beneath the wiper cams along the plane of symmetry of the wipers, the wipers have heat supplied to them substantially continuously. The mounting of the heated plate on the block that engages the bight of the yoke provides for a compact arrangement taking up a small amount of space.

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

We claim:

1. In a lasting machine having a pair of symmetrically disposed wiping units mounted for forward movement from a retracted position to an advanced position, each of said units including a wiper having a leading edge; and means for moving the wiping units forwardly to cause said leading edges to wipe the lasting margin of a shoe upper upon a shoe insole; the improvement comprising: heating means disposed along the plane of symmetry of the wiping units in engagement with the wiping units; means mounting the heating means in a predetermined position that is rearward of said leading edges in the retracted position of the wiping units; and means locking the heating means against movement forwardly of said predetermined position.

2. In a lasting machine having a pair of symmetrically disposed wiping units mounted for forward movement from a retracted position to an advanced position, each of said units including a wiper having a leading edge; and means for moving the wiping units forwardly in a predetermined plane to cause said leading edges to wipe the lasting margin of a shoe upper upon a shoe insole; the improvement comprising: a plate located beneath the wiping units along the plane of symmetry of the wiping units in engagement with both wiping units; means mounting the plate in a predetermined position that is rearward of said leading edges in the retracted position of the wiping units; means locking the plate against movement forwardly of said predetermined position; and means for heating the plate.

3. The machine according to claim 2 further comprising: spring means yieldably urging the plate upwardly into engagement with the wiping units.

4. In a lasting machine having a shoe support for supporting a last having a shoe upper and insole mounted thereon; a pair of symmetrically disposed wiping units; means for moving the wiping units forwardly in a predetermined plane to wipe the lasting margin of the shoe upper upon the shoe insole; a shoe conforming yoke located below the wiping units for conforming the shoe upper to the last during relative heightwise movement between the yoke and shoe support; a head located beneath the wiping units on the plane of symmetry of the wiping units in engagement with the yoke to support the yoke; a plate on the head in engagement with the wiping units; and means for heating the plate.

5. In a lasting machine comprising a frame; a deformable yoke having a bight and a leg on each side of the bight extending forwardly of the bight; a head, mounted in the frame, in engagement with the bight; support means mounted on the frame for supporting the legs of the yoke; a pair of wiping units mounted in the frame above the yoke and head; and means for moving the wiping units forwardly to wipe the lasting margin of a shoe upper on a shoe insole; the improvement comprising: wiper unit heating means located on the head.

6. The machine according to claim 5 further comprising: spring means for yieldably urging the heating means upwardly into engagement with the wiping units.

7. In a lasting machine comprising a frame; a deformable yoke having a bight and a leg on each side of the bight extending forwardly of the bight; a head slidably mounted in the frame; means yieldably urging the head forwardly; a support arm extending alongside of and exteriorly of each yoke leg; means connecting each support arm to a yoke leg; means pivotally connecting the forward end of each support arm to the frame for swinging movement about an axis transverse to the plane of the yoke; resilient means interposed between the support arms and the frame for yieldably urging the yoke legs inwardly of the yoke; means pivotally connecting the rearward ends of the support arms to the head for swinging movement about an axis transverse to the plane of the yoke; 21 pair of wiping units mounted in the frame above the yoke and head, each wiping unit comprising a wiper mounted in a wiper cam; and means for moving the wiping units forwardly to wipe the lasting margin of a shoe upper on a shoe insole; the improvement comprising: a plate supported on the head below the wiper cams; means for heating the plate; and means yieldably urging the plate upwardly into engagement with the wiper cams.

8. In a lasting machine comprising a frame; a deformable yoke having a bight and a leg on each side of the bight extending forwardly of the bight; a head slidably mounted in the frame having at its forward end a recess and a pair of ledges on opposite sides of the recess, said recess bearing against the bight of said yoke; means yieldably urging the head forwardly; a support arm extending alongside of and exteriorly of each yoke leg; means connecting each support arm to a yoke leg; means pivotally connecting the forward end of each support arm to the frame for swinging movement about an axis transverse to the plane of the yoke; resilient means interposed between the support arms and the frame for yieldably urging the yoke legs inwardly of the yoke; means pivotally connecting the rearward ends of the support arms to said ledges for swinging movement about an axis transverse to the plane of the yoke; 21 pair of wiping units mounted in the frame above the yoke and head, each wiping unit comprising a wiper mounted in a wiper cam; and means for moving the wiping units forwardly to wipe the lasting margin of a shoe upper on a shoe insole; the improvement comprising: a plate supported on the head; at least one electric heating cartridge located in the plate; and spring means interposed between the head and plate for yieldably urging the plate into engagement with the wiper cams.

9. A shoe conformer support and wiper heating device comprising: a head; a recess at the forward end of the head; ledges at the forward end of the head on opposite sides of the recess; a depression in the upper surface of the head located rearwardly of the recess and ledges; a plate located in the depression; at least one electrical heating cartridge in the plate; and spring means interposed between the head and plate for yieldably urging the plate upwardly of the head.

10. The invention according to claim 9 further comprising: means limiting the extent the plate may move upwardly of the head under the force applied by the spring means.

11. A shoe conformer support and wiper heating device comprising: a head; a recess at the forward end of the head; ledges at the forward end of the head on opposite sides of the recess; a depression in the upper surface of the head located rearwardly of the recess and ledges; a plate located in the depression; at least one electrical heating cartridge in the plate; a bore extending upwardly into the plate; a counter bore of larger diameter than the bore extending downwardly into the plate and intersecting the bore to form a shelf; a fastener extending through the bore and secured to the head, said fastener having an enlarged head overlying said shelf; and at least one spring interposed between the head and plate for yieldably urging the plate upwardly of the head.

12. The invention according to claim 11 further comprising: a socket at the rear of the head below the plate.

References Cited in the file of this patent UNITED STATES PATENTS 2,066,423 Schoenky Jan. 5, 1937 2,904,801 Kamborian Sept. 22, 1959 2,933,742 Kamborian Apr. 26, 1960 2,958,878 Snow Nov. 8, 1960

Claims (1)

1. IN A LASTING MACHINE HAVING A PAIR OF SYMMETRICALLY DISPOSED WIPING UNITS MOUNTED FOR FORWARD MOVEMENT FROM A RETRACTED POSITION TO AN ADVANCED POSITION, EACH OF SAID UNITS INCLUDING A WIPER HAVING A LEADING EDGE; AND MEANS FOR MOVING THE WIPING UNITS FORWARDLY TO CAUSE SAID LEADING EDGES TO WIPE THE LASTING MARGIN OF A SHOE UPPER UPON A SHOE INSOLE; THE IMPROVEMENT COMPRISING: HEATING MEANS DISPOSED ALONG THE PLANE OF SYMMETRY OF THE WIPING UNITS IN ENGAGEMENT WITH THE WIPING UNITS; MEANS MOUNTING THE HEATING MEANS IN A PREDETERMINED POSITION THAT IS REARWARD OF SAID LEADING EDGES IN THE

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