US2087971A - Folding machine - Google Patents

Folding machine Download PDF

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Publication number
US2087971A
US2087971A US749219A US74921934A US2087971A US 2087971 A US2087971 A US 2087971A US 749219 A US749219 A US 749219A US 74921934 A US74921934 A US 74921934A US 2087971 A US2087971 A US 2087971A
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US
United States
Prior art keywords
finger
work
binding
folding
edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US749219A
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English (en)
Inventor
Jr Joseph Harrington
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United Shoe Machinery Corp
Original Assignee
United Shoe Machinery Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by United Shoe Machinery Corp filed Critical United Shoe Machinery Corp
Priority to US749219A priority Critical patent/US2087971A/en
Priority to DEU12785D priority patent/DE650529C/de
Priority to GB28789/35A priority patent/GB464426A/en
Priority to FR796521D priority patent/FR796521A/fr
Application granted granted Critical
Publication of US2087971A publication Critical patent/US2087971A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D8/00—Machines for cutting, ornamenting, marking or otherwise working up shoe part blanks
    • A43D8/32—Working on edges or margins
    • A43D8/40—Working on edges or margins by folding, turning in or over, hammering
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D43/00—Machines for making stitch lips, or other preparatory treatment of soles or insoles before fixing same
    • A43D43/06—Machines for making stitch lips, or other preparatory treatment of soles or insoles before fixing same for applying reinforcing materials to insoles; Attachment of ornamental tapes or ribs, e.g. sewing ribs, on soles, or the like

Definitions

  • This invention relates to machines for folding the margins of pieces of sheet material such, for example, as parts of the uppers of boots and shoes to which there has been attached,. as by stitching, a strip of binding material commonly called French binding.
  • This adhesive is thermoplastic and, consequently, can be applied and thendried to a non-tacky condition to permit handling, as during the sewing operation. It is subsequently activated by the application of heat.
  • Various devices have been proposed for activating the adhesive just before the binding is folded. The problem is to apply the heat to the binding in just the amount desired at a point closely adjacent to and before the binding reaches the folding instrumentalities so that the binding is very promptly pressed into place after the adhesive has been'activated. It is also desired to apply the heat in the desired locality and in such a manner that it will cause no annoyance to the operator of the folding machine or detriment to the successful operation of the machine itself.
  • This problem was successfully solved by the invention set forth inv Letters Patent of the United States No. 1,850,979, granted March 22, 1932, upon the application of George Williamson, where the heat is supplied to the work by means of a heated presser foot or creaser with which there cooperates the oscillating finger of a folding mechanism.
  • thermoplastic coating upon the work which, while retaining the advantages of the prior construction'referred to, is so constructed and arranged as to facilitate the application of heat to the work and to minimize the energy required to produce the degree of heat necessary to fully According to the other system, an.
  • a feature of the invention consists I in the provision in a folding machine of a heated finger closely adjacent to the presser foot.
  • this finger is located just inside the upturned binding strip where it also contacts with the edge of the work and serves as an edge gage to guide the work to the folding devices.
  • the finger by means of which the thermoplastic coating is activated is in the form of a loop of electrically conductive material through at least a portion of which there is conducted an electric current, this current being utilized to 1.) heat the finger.
  • the loop is supported by engagement with its spaced legs in such a way that angular and vertical adjustments are allowed.
  • v Fig. 1 is a perspective view of a part of a folding machine embodying the invention
  • Fig. 2 is a side elevation of these same parts upon a somewhat larger scale and. showing a piece of work in process of being treated, as it moves away from the observer; 7
  • Fig. 3 is a fragmentary angularview of the 30 operating parts of the machine taken from a different viewpoint so that the work is advancing toward the observer;
  • Fig. 4 is an exploded view of the parts by means of which the edge gage finger is supported;
  • Fig. 5 is a detail view partly in horizontal section through the stud which supports the edge gage, whilev Figs. 6, '7 and 8 show the binding strip before and in successive stages of its application to the work.
  • the invention as herein shown is applied to a folding machine of the type shown. in Letters Patent of the United States No. 1,702,598, granted February 19, 1929, on an application of P. R. Glass.
  • a work support It is mounted in the outer end of a horizontal arm l2 which is positioned just above the bench upon which the machine is supported. Overhanging this is another arm l4 and upon these two arms are supported the folding instrumentalities.
  • the Work to be treated by this machine comprises a piece of sheet material, such as the upper leather Hill shown in Figs. 7 and 8 withthe flesh'side uppermost. Associated with this is a binding strip attached with its edge flush with the edge of the upper by means of a single seam 3%.
  • this binding strip 200 is provided with a coating of thermoplastic adhesive 40%! which is dry and non-tacky when it is brought to the folding machine but which may be activated by the application of heat.
  • the binding strip in Fig. 6 is inverted in Fig. 7 so that its coated side is down.
  • the coating 49!] contacts with the uppermost or fiesh surface of the piece of work I00.
  • the downwardly facing surface of the work shown in Fig. 8 is, then, the grain surface or that which is exposed in the finished work.
  • the folding operation is accomplished by folding instrumentalities including a creaser or presser foot [6 which has a roll I8 to facilitate its passage over portions of the work.
  • the upwardly turned binding strip 2B9 is heated by means of a finger 2B and then bent over the creaser l6 by an oscillating folding finger 22 (Figs. 2 and 3) after which it is pressed down upon the work by means of a hammer 24 cooperating with the inclined face of an anvil 26.
  • the hammer 24 and the anvil 26 cooperate to press the fold and have'a movement together to feed the work.
  • the presser foot l6 and an intermittently lifted block 28.
  • a plate 30 over which the curled edge of the binding passes is. grooved at 32 to receive this curled edge, as shown in Fig. 2.
  • the folding finger 22 is carried upon a lever '34 which is pivoted on a stud 36.
  • this stud is eccentrically mounted in a block 38 attached to the end of the arm l2.
  • An arm 40 attached to this pivot stud may be adjusted and held in adjusted position thereby to bring the path of movement of the folding finger 22 nearer to or farther away from th creaser or presser foot IS.
  • the presser foot I 6 and the heated finger 20 are supported on levers H0 and 48 respectively (Fig. 5) which are pivotally supported upon a pin 44 extending into a depending portion 45 (Fig. 2) of a bracket 42 which is adjustably clamped in position at the outer end of the arm l4.
  • the lever 48 has a finger piece 50 at one end and is held by a spring 52 against an adjustable stop 54. At its outer end this lever is perforated to receive a hollow stud 56 (Figs. 4 and 5) which is enlarged at 58 to abut one surface of the lever.
  • the finger 20 is in the form of a loop and the enlarged portion 58 has parallel fiat surfaces 60 upon which are attached holders for the legs 62 of the finger.
  • the heating of the finger is accomplished by passing an electric current through the loop. It is, consequently, necesssary to insulate the legs62 from one another and from the supporting mechanism.
  • pieces of insulation 64 such as mica
  • These holders 66 are secured to the enlarged portion 58 of the hollow stud 56 by means of screws 70, which are centered within recesses in the holders and are insulated from the holders, by means of mica; washers 72.
  • Current is supplied to these holders by flexible leads (4 which are soldered to terminal lugs 16 which are attached by means of screws to the holders.
  • the legs of the finger 29 are clamped in the grooves 68 of the holders by being pressed laterally into the grooves by a clamping mechanism comprising an insulating mica washer 18, a metal Washer and a screw 82, this screw having a crosspin 84 which is received in a groove 86 at the end of the hollow stud 56.
  • this construction greatly facilitates the removal and replacement of the finger 2D and that the finger may be adjusted either angularly about the axis of the screw 32, or vertically, or both.
  • Angular adjustment is provided by loosening the nut 9! and swinging the stud 56 in the lever 48.
  • Vertical adjustment is provided by loosening the nut 83 and sliding the legs 62 of the finger in the grooves 68 of the holders.
  • means are provided for controlling the amount of current supplied through the loop of the finger 29 and this may take the form of a transformer I02 illustrated diagrammatically in Fig. 3 as provided with secondary taps and with a sliding contact to allow ready change of the connection to the taps.
  • the thin vertical lower end I04 (Fig. 4) of the finger 20 is so positioned with respect to the folding instrumentalities that it serves as an edge gage abutting the edge of the leather work piece ID! at a point substantially opposite to the point of contact of the roll IS in the presser foot and as close as possible to the folding finger 22.
  • the edge gage finger 20 does not interfere with the turning of the work on inside curves.
  • the binding 200 is kept constantly in close engagement with the inner face of the finger 20 by reason of the action of the folding finger 22 in holding the approaching portion of the binding turned up and, therefore, the heat is applied to the adhesive coating 4% upon the binding material at a point where it is most effective.
  • the heat is localized in the finger and this means that the amount of electric power necessary to activate the binding is greatly reduced, that adjacent parts of the machine are not heated to a point where they are an annoyance to the operator, and that the activation of the adhesive coating is very effective. Inasmuch as the heat is applied just prior to the folding operation, it is not necessary to heat the binding anymore than is required to soften the adhesive and loss of heat during the passage of the binding through the machine is negligible so that no allowance need be made therefor. V
  • the presser foot I6 is slidably supported in the outer end of a lever Hi3 which, as noted above, is also carried upon the stud 44.
  • the lever H0 has a finger piece H2 which is overlapped by a lug ll l upon the finger piece 58 so that the two may be depressed together.
  • This presser foot lever is urged to a position determined by an adjustable stop screw ii i by means of a spring (not shown), the compression of which is determined by an adjusting screw i it.
  • the presser foot itself is slidably supported in the outer end of the lever i iii, being urged toward the work by a spring I 20 and held against complete expulsion by a stop screw I22.
  • auxiliary electrical heating unit supported by a bracket I36.
  • This unit I33 which is contained within hollow sleeves I32, is supplied through a flexible conduit I34 and associated with it is a forwardly extending member I36 having an enlarged head I38 at its outer end.
  • the member I35 is mounted upon one of the sleeves I32. This head I38 will become hot and is exposed so that the small portions of the binding which are to be activated manually may be pressed against it and quickly heated thereby. All other portions of the heating unit and the member I36 are covered to conserve the heat and to avoid any danger of burning the operators fingers.
  • a rigid cover lid of ceramic material or the like to the outer surface of which there is secured a felt cover I42.
  • the machine having been. set up with the parts in the desired adjustment, its operation is substa'ntially as already described, it being only necessary for the operator to depress the finger piece 59 in order to insert the work beneath the presser foot I6 and the finger 28. In. so doing, the operator will bring the edge of the leather workpiece Ifiil into contact with the edge gage finger 2B and will curl up the leading end of the binding so that it is pushed up by the finger 22 and then forced down into firm engagement with the flesh surface by the hammer 24.
  • the Work will be fed forward by the coaction of the hammer 24 with the anvil 26 and, as the binding is dragged over the heated edge gage finger 2f], the thermoplastic adhesive MN] thereon. will be activated so that the binding will immediately stick firmly in place upon the flesh surface of the leather I00.
  • a machine for fol-ding French binding pre-coated with a thermoplastic cement and attached to a work piece a work support, a presser foot engaging the work piece to hold it against the support, means for folding the binding and feeding the work, said machine being provided with a gage finger for contact with the edge of the work piece and with the upturned binding immediately adjacent to the presser foot, and electrical means for setting up a fiow of current in said gage finger to heat it.
  • an edge jgage comprising a loop of electrically conductive material formed into legs and a finger for engagement with the work immediately prior to the folding operation, electrically insulated supporting means for the legs of said loop, and means for conducting an electric current through said loop.
  • folding instrumentalities and an edge gage comprising a loop of electrically conductive material the legs of which join to form a finger for engagement with the work immediately prior to the folding operation, a support, means for clamping the legs of said loop upon said support in insulated relation to one another, said clamping means being constructed and arranged to permit angular adjustment of said finger with respect to the folding instrumentalities, and means for conducting an electric current through said loop.
  • folding instrumentalities and an edge gage comprising a loop of electrically conductive material the legs of which join to form a finger for engagement with the work immediately prior to the folding operation, a support, means for clamping the legs of said loop upon said support in insube folded comprising a heating unit in'heat conductive relation to said presser foot, means for folding the binding and feeding the work, said machine being provided with a metallic finger to contact with the upturned binding immediately adjacent to the presser foot, and means for conducting an electric current through at least a portion of said finger thereby to heat the finger and to activate the thermoplastic adhesive.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
US749219A 1934-10-20 1934-10-20 Folding machine Expired - Lifetime US2087971A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US749219A US2087971A (en) 1934-10-20 1934-10-20 Folding machine
DEU12785D DE650529C (de) 1934-10-20 1934-11-11 Umbugmaschine
GB28789/35A GB464426A (en) 1934-10-20 1935-10-18 Improvements in or relating to the folding of margins of sheet material
FR796521D FR796521A (fr) 1934-10-20 1935-10-19 Machine à remplier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US749219A US2087971A (en) 1934-10-20 1934-10-20 Folding machine

Publications (1)

Publication Number Publication Date
US2087971A true US2087971A (en) 1937-07-27

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ID=25012786

Family Applications (1)

Application Number Title Priority Date Filing Date
US749219A Expired - Lifetime US2087971A (en) 1934-10-20 1934-10-20 Folding machine

Country Status (4)

Country Link
US (1) US2087971A (fr)
DE (1) DE650529C (fr)
FR (1) FR796521A (fr)
GB (1) GB464426A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466802A (en) * 1944-12-30 1949-04-12 United Shoe Machinery Corp Edge treating machine
EP3106525A1 (fr) * 2015-06-17 2016-12-21 Overmec S.r.l. Machine linéaire améliorée de tournage/pliage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1162226B (de) * 1959-04-20 1964-01-30 Zd Y 29 Augusta Narodny Podnik Als Mehrzweckmaschine ausgebildete Einfassnaehmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2466802A (en) * 1944-12-30 1949-04-12 United Shoe Machinery Corp Edge treating machine
EP3106525A1 (fr) * 2015-06-17 2016-12-21 Overmec S.r.l. Machine linéaire améliorée de tournage/pliage

Also Published As

Publication number Publication date
GB464426A (en) 1937-04-19
DE650529C (de) 1937-09-30
FR796521A (fr) 1936-04-09

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