US3105250A - Shoe stiffener heating apparatus - Google Patents

Shoe stiffener heating apparatus Download PDF

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US3105250A
US3105250A US100905A US10090561A US3105250A US 3105250 A US3105250 A US 3105250A US 100905 A US100905 A US 100905A US 10090561 A US10090561 A US 10090561A US 3105250 A US3105250 A US 3105250A
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station
stations
block
gage
shoe
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US100905A
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Jacob S Kamborian
Robert B Dunlap
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Kamborian
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    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43DMACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D11/00Machines for preliminary treatment or assembling of upper-parts, counters, or insoles on their lasts preparatory to the pulling-over or lasting operations; Applying or removing protective coverings
    • A43D11/12Machines for forming the toe part or heel part of shoes, with or without use of heat

Description

Oct. 1, 1963 J. 5. KAMBORIAN ETAL 3,105,250
SHOE STIFFENER HEATING APPARATUS 3 Sheets-Sheet 1 Filed April 5, 1961 FIG. 2
IN VEN TORS f m 5 HS 0 mm l ATTY WM Oct. 1, 1963 J. s. KAMBORIAN ETAL 3,105,250
SHOE STIFFENER HEATING APPARATUS Filed April 5, 1961 3 Sheets-Sheet 2 IIl-FI /34C A36 C INVENTORS Robe/"2 B. Dun/0,5 BY Jacob S. Kamborlon ATTV W/VMM Oct. 1, 1963 J. 5. KAMBORIAN ETAL 3 SHOE STIFFENER HEATING APPARATUS 5 Sheet-Sheet 3 Filed April 5, 1961 I308 I328 430C I326 INVENTORS Robe/*2 B. Dun/0,0 BY Jacob 5. Kambor/an A rrr W; a
United rates Patent 3,1t 5,259 SHGE STZFFEr ER HEATING AIEARATUS 1i acob S. Karneorian, West Newton, and Robert E. Damian, la'iedway, Mass; said Dunlap assigns: to said Kamborian Fitted Apr. 5, 1951, Ser. 1. o. 1659.995 it) Ciairns. (iii. 152-5421) In pending application Serial No. 90,874 filed February 21, 1961, there is disclosed an apparatus for heating a shoe stiffener lying within a pocket formed on a shoe upper with an exposed portion extending upwardly of the pocket. The heating apparatus has the purpose of conditioning the stiffener as one of the steps in carrying out the method disclosed in pending application Serial No. 80,919 filed January 5, 1961. The heating apparatus comprises a heated block having a convex surface about which the upper and stifiener is draped with the portion of the stiffener concealed within the pocket bearing against the block surface. Above said biocl; surface, a step is provided having a plurality of ports therein through which heat d air passes to impinge on the exposed counter portion. A clamping pad is rrounted for movement toward and away from the block to clamp the upper and stiffener against the block and thereby heat the stiifener.
An object of this invention is to ensure that when the upper is draped about the block, the exposed stiffener portion will be opposite the step in the block and the concealed counter portion will be opposite the block surface below the step. To accomplish this, a gage is provided that bears against the block surface and is vertically adjustable for different shoe sizes. When the gage has been adjusted for a given shoe size and the upper draped around the last is brought to abut against the gage, the exposed counter portion will be accurately positioned opposite the step in the block.
it has been found that it takes a longer period to heat the shoe stiffener in the apparatus of the aforementioned application Serial No. 90,874 filed February 21, 1961, than it takes to perform the succeeding heel seat lasting and stiffener forming step described in the aforementioned application Serial No. 80,919 filed January 5, 1961. in order to allow the operator to heat a plurality of stiifeners at a time and have them available in heated condition at periodic intervals, the invention provides for a plurality of heating stations h re disclosed as four, and a control for operating the stations so that, at any given time, one of the stations is open and the others are closed. Upon the actuation of a control the first station closes and the next station opens, and this sequence continues in seriatim upon each succeeding actuation of the control. A selector switch is provided which when actuated causes two of the stations to stay permanently in closed position and permits the remaining two stations to be actuated in seriatim as heretofore described.
Reference is now made to the accompanying drawings wherein:
PEG. 1 is a front elevation view of the apparatus;
FIG. 2 is a side elevation view partly in section of one of the stations of the apparatus;
FIG. 3 is a sectional View to an enlarged scale of the gage adjusting mechanism taken along the line 3-3 of FIG. 1;
FIG. 4 is a view taken along the line 4-4 of E16. 3;
FIG. 5 is a wiring diagram of the electric circuit for the apparatus; and
FIG. 6 is a diagram of the air flow lines used in controlling the apparatus.
As shown in FIGS. 1 and 2, the apparatus comprises a plurality of stifiener heating stations, NA, 10B, 16C and 18D mounted on the top plate 12 of a base 14. At each station there is a block 16, made of a heat conductive material such as aluminum, secured to the plate 12 by several threaded fasteners 1.8, one of which is shown in FIG. 2. insulat-ive spacers 2d are mounted on the fasteners 15 and interposed between the block 16 and the plate 12 to provide an air space between the block and the plate. The block has substantially planar bottom and top faces 22 and 24, an arcuate, convex rear face 26 corresponding in shape roughly to that of the heel end of a shoe last, and a front face 27.
The block has an indent in the shape of a step 28 at the junction of the surfaces 24 and 26. The step has a tread 39 substantially parallel to the face 24 and a riser 32 substantially perpendicular to the face 24. An air duct runs beneath the top face 24 from the front face 27 to a position adjacent the rear face 26. The front end of the duct 34- is closed by a plug 36 threaded into the block 16. An air duct extending upwardly from the bottom face 22 intersects the duct 54. A hoilow nipple 4% is threaded into the block 16 at the bottom of the duct 33. The nipple it; is connected to an air line 42 which in turn is connected to a source of air pressure (not shown). A plurality of air ports 4-4 extend from the duct 34 to the riser 3.2 of the steps 2% and intersect the riser at spaced intervals along its length. Electric heating cartridges 46, the bottom of one of which is shown in FIG. 2, are provided in holes in the block 16, and are connected to a source of power. A thermostat 48 is positioned in another hole in the block.
At each station, the cylinder 5% of an air operated motor 52 is mounted on an L-shaped bracket 54 which in turn is secured to the top plate 12. A piston rod 56 eX- tends forwardly of the cylinder. Air entering a port 58 of the cylinder through a line 60 will project the piston rod forwardly of the cylinder, and air entering the cylinder through a port 62 from an air line 64 will retract the piston rod. A U-shaped clamping pad '66 is connected to the piston rod 56. The connection between the piston rod and the clamping pad includes a U-shaped rigid bar 63 connected to the piston rod and a U-shaped leaf spring 76 interposed between the pad 66 and the bar 68. The legs of the springs are connected to the legs of the pad and a lost-motion connection 71 is provided between each clam-p leg and the contiguous bar leg.
The structure thus far described is similar to that disclosed in the aforementioned application Serial No. 90,874 filed February 21, 1961, to which reference may be made for a more detailed disclosure thereof.
Each block 16 has a gage 7?. bearing against its surface 25. The gage is a substantially L-shaped member having an abutment surface 73 at the top of its upright leg. The prone leg of the gage is pivotally connected at pivot '74 to a bevel gear 75 that is rotatably mounted in a hanger 76 depending from the plate 12. A compression spring 78, that is interposed between the upright leg of the gage and a block 8% dependent from the plate 12, resiliently urges the gage about its pivot 74 to cause the upright leg to bear against the block face 26. The gear o 75 is in mesh with a bevel gear d2 that is rigidly mounted on a shaft 84 which is rotatably mounted in a hanger 86 depending from the plate 12.
The base 14- includes a vertical front plate 83. The shaft 84 extends through a clearance opening 9% (see FIG. 3) in the plate 38 and has a shoulder 92 approximately in line with the exterior surface of the plate 88 to form a smaller diameter shaft extension d3 projecting outwardly of the plate 83. A disc 94, having a notch 96 in its periphery, is loosely mounted on the extension 93 and bears against the shoulder 92. A collar is loosely mounted on the extension 93 outwardly of the disc 94 and bears against the disc; The collar is keyed to the extension by means of a roll pin 1% that is press fitted in the collar and has its inner extremity resting in an elongated groove 162 in the extension 93. A nut 194 is threaded onto the end of the extension 93 and bears against the collar 98. The pad 66 has a cut-out 1136 to accommodate the gage 72. 1
The workpiece treated at each station comprises a shoe upper 108 having a liner 110 stitched thereto at its heel end so as to form a pocket therebetween which receives a counter 112 (see FIG. 2). As described more fully in the aforesaid application Serial No. 90,874 filed February 21, 1961, the upper ends of the counter and upper are substantially coextensive while the upper end of the liner is below the upper ends of the counter and upper. This provides an exposed counter portion positioned above the liner and a concealed counter portion positioned behind the liner. The workpiece is draped around the surface 26 of the block 16, and is clamped thereagainst by actuation of the motor 52 to cause the pad 66 to bear against the block 16. The concealed counter portion is heated by heat being conducted from the block 16, which is heated by the heaters 46, through the liner 110. The exposed counter portion is heated by air going through the line 42, ducts 3-8 and 34 and ports 44 and impinging against the exposed counter portion, the air being heated during its passage through the block. Should the exposed counter portion be so located that it bears directly against the block 16, this will have a deleterious effect as the heat of the block will tend to distort the counter material and adversely affect adhesive that is coated on the counter. The gage 72 is so located, that for a given shoe size, when the lower surface of the work rests on the abutment 73, the exposed counter portion will be opposite the indent 28 and the concealed counter portion will be opposite the block surface 26. In order to adjust the location of the gage 72 when changing the size of the work, indicia are provided on the front plate 88 about the periphery of the disc 94 (see FIG. 4). The numeral registering with the notch 96 indicates the size work that the gage is set for.
The counter heating apparatus is designed to render the counters flaccid as a step in the method described in the aforesaid pending application Serial No. 80,919 filed January 5, 1961. In accordance With said method, after the counters are heated, the uppers are placed on a last in a heel seat lasting machine where the counters are molded to the shape of the last and the uppers are lasted to an insole that is placed on the last. Since the lasting machine can last a shoe in a shorter period of time than it takes for the counter to be heated to the desired extent, it is desirable that a plurality of the counters be heated at different stations at one time and that a counter at one station be ready for insertion into the lasting machine while the counters at the other stations are being heated.
In operating the apparatus, the gage '72 is initially adjusted to raise or lower the gage for the size shoe that is being worked. This is done by rotating the collar 98, which due to the splined connection between the collar and the shaft extension 93, causes rotation of the shaft 84. Due to the nut 11%, collar 93, disc 94 and shoulder 92 bearing against each other, the rotation of the collar also causes the disc to rotate. The rotation of the shaft 34, through the gear train 73, 32 causes the pivot 74- to swing about the axis of rotation of the gear 75 with the gear 75 acting as a crank. This in turn raises or lowers the gage '72. The spring maintains the gage '72 hearing against the block surface 25, in all positions of adjustment of the gage. During the rotation of the collar 93 and disc 94, the indica registering with the notch 35 will indi- Cate the size shoe for which the gage is set. Should it be found desirable to reset the disc 5 4 without moving the gage in order to calibrate the disc, this may be done by partially unscrewing the nut 164, and backing off the collar 8 along the shaft extension 93 with the pin 1% riding in the groove 1%2. This will loosen the disc so that it may be rotated to the desired position on the extension 93. When the disc is in the desired position it is reclampcd between the collar 93 and the shoulder 92 by tightening the not 164.
The four stations are so controlled that at a given time one of the pads, say at station 149A, is in open position and the remaining pads are in closed position. The power tor the heaters 46 is turned on to heat the blocks 16 and air is caused to go through the blocks 16, to thereby heat it, and to emanate fromthe ports 44. A workpiece is draped about the block 16 at station 10A so as to rest on the abutment surface 73. The control is now actuated to close the pad at station 1iiA to thereby heat the work and concomitantly open the pad at station 1033 to allow the operator to place a workpiece in station 1933. Successive actuation of the control will open station 16C and close station 1liB, open station MD and close station 19C, open station 19A and close station 191), and so on serially. When workpieces have been placed at all the stations, the operator will take a workpiece from the open station and bring it to the heel seat lasting machine to mold the counter and last the shoe and place a new workpiece at the open station. He will then actuate the control to open the next station and bring the workpiece at that station to the lasting machine and place a new 'workpiece in that station, and continue this operation at succeeding stations each time he operates the control. in this manner, there is always a workpiece that has been heated long enough to be in condition to be presented to the lasting machine when the lasting machine is ready to receive it;
The machine may optionally be operated using only two stations, say stations 10A and 103, so that one actuation of the control will open station 142A and close station 10B, the next actuation opens station 16B and closes station 10A. In this situation stations 10C and 16D would be in closed position at all times.
The electric circuit shown in FIG. 5 and the fluid pressure circuit shown in FIG. 6 may be used to carry out the above described sequence of operations.
Referring to FIG. 5, the electric circuit includes a switch 116 controlled by a foot pedal (not shown) which when closed momentarily causes current to flow from a power source labelled L1, L2 and pulse the coil 118 of a latch relay 129. The relay 120 is a commercial item having 24 contacts labelled (11 through i124 and a switch blade 122 that indexes clockwise about pivot 124 from one contact to the next contact each time the coil 118 is pulsed by attracting an armature that is connected -by a ratchet and pawl mechanism to the blade 122. The switch blade 122 is connected to the source of power by lines 126 and 128. The contacts a1, a5, a9, (113, 1117 and Q21 are connected to solenoids 130A and 132A, the contacts a2, a6, r110, r114, Q18 and a22 are connected to solenoids 13GB and 132B, the contacts 03, a7, all, 1115, 1119 and (Z23 are connected to solenoids 130C and 132C, and the contacts :14, a8, (112, (I16, n20, and a24 are connected to solenoids 130D and 132D.
The solenoids 130A, 139B, 13tlC, 133D are respectively connected to valves 134A, 1343, 134C and 134D so that when the solenoids are deenergized air pressure does not flow through the valves from the source of air pressure, but air in the lines from the motors 59 to the valves are vented, and when they are energized, air pressure flows through the valves into the motor 50 at the associated station A, 10B, 16C or 10D in a direction to retract the piston 56 into the cylinder 50 and thereby open the station. The solenoids 132A, 132B, 132C, and 132D are respectively connected to valves 136A, 136B, 136C and 136D so that when the solenoids are deenergized, air pressure flows through the valves into the associated motor 52 in a direction to project the piston rod 56 out of the cylinder 50 and close the station, and when they are energized, air pressure does not flow through the valves from the source of air pressure, but air in the lines from the valves to the motors are vented through the valves.
The electric circuit includes a selector switch unit 138 that has four single pole double throw switches b, c, d, and e, that are movable in unison from the contacts b1, 01, d1, 21 to or from the contacts b2, c2, d2, e2. When using all four stations, the contacts b2, 02, d2, 22 are closed.
The movement of the switch blade 122 to engage a contact connected to the solenoids 130A and 132A causes current to flow through the contact of the switch 129 to the solenoids 139A and 132A to energize them and open the station 10A. The movement of the switch blade 12 2 upon momentary closing of the switch 116 to engage a Contact connected to the solenoids 13913 and 13213 causes these solenoids to be energized and station 1913 to he opened and, at the same time causes station IGA to be closed due to the deenergization of the solenoids 136A and 132A. The next actuation of the switch 115 causes a movement of the switch blade 122 to engage a contact connected to the solenoids 130C and 132C through the contact d2 of the switch d to thereby close the station 10B and open the station 10C. The next actuation of the switch 116 causes the switch blade 122 to engage a contact connected to the solenoids 133D and 132D through the contact e2 of the switch e to open the stat on 10D and close the station 100. Thus successive actuation of the switch 116 causes the stations 10A, 1GB, 1%C and 10D to be opened in seriatim, the preceding station being closed when each station is opened.
The actuation of the selector switch unit 138 to cause the switches b, c, d and e to respectively engage the contacts b1, c1, d1 and 21 causes the solenoids 136K), 132C, to be energized at all times through the lines 126 and 148 and the contact d1 of the switch a, and causes the solenoids 139D and 132D to be energized at all times through the lines 126 and 140 and the contact e1 of the switch 2. The movement of the switch blade 122 to a contact that would normally energize the solenoids 130C and "132C instead energize the solenoids 139A and 132A through the switch b, and the movement of the switch blade 122 to a contact that would normally energize the solenoids 139D and 132D instead energizes the solenoids 13GB and 1323 through the switch 0. In this manner, the control circuit may be set to maintain the stations 10C and 10D open at all times and to cause stations 18A and 1013 to be alternately closed upon each actuation of the switch 116.
When the machine is operated, air pressure continuously enters the air lines 42 and passes through the blocks 16 after first going through a restrictor valve 142.
It should be understood that the present disclosure is for the purpose of illustration only and that this invention includes all modifications that come within the scope of the appended claims.
We claim:
1. A shoe stiffener heating apparatus comprising: a heated block having a convex surface; an indent above said surface; at least one port in said indent through which heated air is adapted to flow; an L-shaped gage, having an upright leg and a prone leg, located adjacent said 6 surface; a spring bearing against the gage to resiliently urge said upright leg against said surface; a rotatably mounted crank pivo-tally connected to said prone leg; and means to rotate said crank.
2. A shoe stitfener heating apparatus comprising: a frame; a heated block having a convex surface mounted on said frame; an indent above said surface; at least one port in said indent through which heated :air is adapted to flow; an L-shaped gage, having an upright leg and a prone leg, located adjacent said surface; a spring bearing against said upright leg to resiliently urge it against said surface; a crank rotatably mounted in said frame to which said prone leg is pivotally connected eccentrically of its axis of rotation; and a shaft geared to said crank extending outwardly of the frame.
3. The apparatus according to claim 2 wherein said frame has indicia mounted thereon adjacent the shaft; and register means cooperative with said indicia is mounted for rotation with said shaft.
4. The apparatus according to claim 3 wherein said register means comprises a disc, mounted for rotation with said shaft, having a notch adapted to register with said indicia.
5. A multiple station shoe titfener heating apparatus comprising: a plurality of stiffener heating stations, each of said stations having a pair of relatively movable clamps for clamping a stiffener while it is being heated; a motor at each station for effecting relative movement of said clamps toward or away from each other to thereby close or open the station; a control means connected to said motors, said control means maintaining certain of said stations open and the remainder of the stations closed; and means responsive to successive actuations of said con trol means to cause said motors to open said stations in seriatim and concomitantly close the previously opened stations.
6. The apparatus according to claim 5 :further having a control modifying means, and means responsive to actuation of the control modifying means to deactivate certain of the stations and permit the remainder of the stations to be operated in seriatim in response to successive actuations of the control means.
7. A multiple station shoe stiffener heating apparatus comprising: a plurality of stiffener heating stations; a block at each of said stations "for heating a stiffener; a clamping pad cooperative with each block to clamp the stiifener the-rebetween; a motor connected to each clamping pad to move the pad toward or away from its associated block to thereby close or open the station; a control means connected to said motors to actuate the motors to open one of said stations and close the remaining stations; and means responsive to successive actuations of the control means to cause said motors to open said stations in seriatim and close the previously opened station.
8. In a shoe stiffener heating apparatus having a plurality of stiffener heating stations for heating shoe stiffeners, each stiffener being located in a pocket formed by a liner and an upper with a portion of the stiffener concealed within the pocket and a portion exposed outside of the pocket, and wherein each of said stations comprises a heated block having a surface adapted to bear against the liner to heat the concealed stiffener portion; an indent adjacent said surface; means in said indent to permit heated gas to flow against the exposed stiffener portion; a movably mounted clamping pad; and a fluid operated motor connected to the clamping pad to move the pad against the block and thereby close the station and to move it away from the block and thereby open the station; the improved control for said apparatus comprising: valve means at each station operatively connected to the associated motor to normally close the station; switch means connected to said valve means to maintain at least one of the stations open with the remainder of the stations closed; and means responsive to successive actuations of the switch means to actuate the valves at the stations in seriatim to open the stations in seriatim and concomitantly close the previously opened stations.
9. The apparatus according to claim 8 further comprising: an optionally operable selector switch; and means responsive to actuation of the selector switch to actuate the valves at certain of the stations to maintain the stations continuously closed and to permit the remainder of the stations to be opened in seriatim upon successive actu ations of the switch means.
10. A shoe treating apparatus comprising: a block having a surface against which a shoe part is adapted to bear; a gage located adjacent said surface having an but- 8 ment surface at its top; a spring bearing against the gage to resiliently urge the abutment surface against the block surface; a rotatably mounted crank pivotally connected to the gage below the abutment surface; and means to rotate the crank to thereby move the abutment surface along the block surface.
References Cited in the file of this patent UNITED STATES PATENTS 1,326,112 Stubbs Dec. 23, 1919 1,349,699 Gorsuch Aug. 17, 1920 2,271,682 Dodge Feb. 3, 1942 2,719,992 Macdonald Oct. 11, 1955

Claims (1)

1. A SHOE STIFFENER HEATING APPARATUS COMPRISING: A HEATED BLOCK HAVING A CONVEX SURFACE; AN INDENT ABOVE SAID SURFACE; AT LEAST ONE PORT IN SAID INDENT THROUGH WHICH HEATED AIR IS ADAPTED TO FLOW; AN L-SHAPED GAGE, HAVING AN UPRIGHT LEG AND A PRONE LEG, LOCATED ADJACENT SAID SURFACE; A SPRING BEARING AGAINST THE GAGE TO RESILIENTLY URGE SAID UPRIGHT LEG AGAINST THE GAGE TO RESILIENTLY MOUNTED CRANK PIVOTALLY CONNECTED TO SAID PRONE LEG; AND MEANS TO ROTATE SAID CRANK.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238545A (en) * 1963-02-19 1966-03-08 Automated Systems Inc Apparatus for shaping shoe uppers
US3464073A (en) * 1966-11-12 1969-09-02 Ralphs Unified Ltd Apparatus for use in shoe manufacture
US3545023A (en) * 1968-11-12 1970-12-08 George W Foss Shoe manufacturing
US3775796A (en) * 1971-09-08 1973-12-04 H Schindler Machine for pre-shaping shoe parts

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1326112A (en) * 1919-12-23 Method of and apparatus for lasting boots and shoes
US1349699A (en) * 1919-10-28 1920-08-17 Richard H Tyner Marking, listing, and assorting booth
US2271682A (en) * 1939-04-12 1942-02-03 Milton L Dodge Counter former
US2719992A (en) * 1953-12-15 1955-10-11 United Shoe Machinery Corp Backpart molding machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1326112A (en) * 1919-12-23 Method of and apparatus for lasting boots and shoes
US1349699A (en) * 1919-10-28 1920-08-17 Richard H Tyner Marking, listing, and assorting booth
US2271682A (en) * 1939-04-12 1942-02-03 Milton L Dodge Counter former
US2719992A (en) * 1953-12-15 1955-10-11 United Shoe Machinery Corp Backpart molding machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238545A (en) * 1963-02-19 1966-03-08 Automated Systems Inc Apparatus for shaping shoe uppers
US3464073A (en) * 1966-11-12 1969-09-02 Ralphs Unified Ltd Apparatus for use in shoe manufacture
US3545023A (en) * 1968-11-12 1970-12-08 George W Foss Shoe manufacturing
US3775796A (en) * 1971-09-08 1973-12-04 H Schindler Machine for pre-shaping shoe parts

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