US3798694A - Apparatus for fitting shoe uppers - Google Patents

Apparatus for fitting shoe uppers Download PDF

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Publication number
US3798694A
US3798694A US00238565A US23856572A US3798694A US 3798694 A US3798694 A US 3798694A US 00238565 A US00238565 A US 00238565A US 23856572 A US23856572 A US 23856572A US 3798694 A US3798694 A US 3798694A
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United States
Prior art keywords
last
die
assembly
concavity
central
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Expired - Lifetime
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US00238565A
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English (en)
Inventor
T Holt
J Barre
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.)
Centre Technique Cuir Chaussure Maroquinerie
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Centre Technique Cuir Chaussure Maroquinerie
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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D21/00—Lasting machines
    • A43D21/18—Lasting machines with lasting pincers and straight-acting wipers, also for forming the shank portions of shoes
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D21/00—Lasting machines
    • A43D21/12—Lasting machines with lasting clamps, shoe-shaped clamps, pincers, wipers, stretching straps or the like for forming the toe or heel parts of the last

Definitions

  • ABSTRACT In order to reduce the possibility of producing cracks 30 Foreign Application p i i D and other damages when lasting shoe uppers, the fore Apr 6 1971 Fmnce 71 13208 and back parts of the last are used as a mold core for shaping the upper, in combination with die means hav- 52 ⁇ us. on. 12/85 12/145 ing concavities conforming the desired Shoe 51 int. 01 A4511 21/00 The last is of the type Co'Prismg swims [58] Field of Search H 12/7 81 8'5 12 145 hingedly interconnected substantially intermediate its 5 2 ends and near its bottom.
  • the disclosed apparatus comprises a central portion for mounting the upper [56] References Cited upside down, a front unit for shaping and tuning the front part of the upper, and a back unit for shaping UNITED STATES PATENTS the heel part of the upper. 1110.323 9/1914 Hamilton .1 l2/l45 1 135946 4/1915 Brothers 12/145 7 Claims, 8 Drawing Figures APPARATUS FOR FITTING SHOE UPPERS FIELD on THE INVENTION
  • the present invention relates to the technique of fitting the fore and back parts of a shoe upper on a suitable last, with folding or turning of its projecting marginal connecting portions over the insole.
  • the upper covering the last is engaged between pincers which are subsequently reclosed.
  • the number of such pincers may vary from three to l l and each pair of pincers is adapted to assume any desired direction in space, in order to ensure an extremely accurate positioning of the upper.
  • the last is fitted definitely in the upper by either actually raising the last or simultaneously lowering the assembling pincers.
  • This operation is necessary for eliminating pleats tending to develop on the upper as a consequence of the conversion of a flat surface into a volume.
  • this lasting method involves the application of stresses definitely greater in the direction of the longitudinal axis of the upper. Therefore, the lateral forces that should be applied to the upper are not sufficient and the shape is far from having the desired fidelity, notably in the top portion of the upper. As a result, the upper does not adhere to the concave portions of the last.
  • the lasting of the rear part of an upper is performed only after preshaping the counter on a metal die by using an inflatable bladder or a the like.
  • the preshaping operation is designed as a rule to impart to the rear part a shape approximating the finished shape obtained after the final lasting operation.
  • This preshaping operation is accomplished either by accelerating the rate of solvent evaporation (in order to increase the stiffness of the counter if the latter is initially too soft) or by heatsoftening the counter if it is deemed too hard.
  • the upper is deformed under the best possible conditions and adheres perfectly to the corresponding portions of the last.
  • An apparatus for carrying out this method comprises essentially:
  • a central assembly adjustable in the longitudinal direction for properly placing the last in its upside-down position a front assembly for lasting the fore part of the upper, which comprises a fixed but adjustable die provided with a pair of movable jaws for folding the projecting marginal portions of the upper by means of a presser element such as a cylinder-and-piston unit or jacks capable of sinking the fore part of the last into the die, and also by means of other cylinder-and-piston units or jacks for pressing the upper edges against the die edges until the last has been properly sunk, and
  • a rear assembly for lasting the back or heel part of the upper which comprises a die displaceable to press same against the last and provided with another pair of movable folding jaws.
  • This machine is constructionally relatively simple and capable of giving very satisfactory results it can be easily incorporated into an automatic industrial shoe-making line.
  • the central support is connected to a cylinder-and-piston unit adapted to drive this support away from the die coacting with the fore part of the last, during the deformation of the corresponding portion of the upper in order to impart longitudinal stresses to the upper simultaneously with the transverse stresses resulting from such deformation.
  • FIGS. 1 and 2 are side-elevational views showing in section the lasting apparatus according to this invention before and during the upper deformation
  • FIGS. 3, 4, 5 and 6 are sections taken along the line 44 of FIG. 2, showing some of the various steps of the upper-deformation process
  • FIG. 7 is a top plan view showing on a larger scale the assembly provided for shaping the back part of the upper;
  • FIG. 8 is a section taken along the line 8-8 of FIG. 7.
  • the apparatus illustrated diagrammatically in the drawing comprises three main assemblies, i.e., a central assembly or unit 2, a front assembly 3 for shaping the fore or toe part of the upper, and a rear assembly 4 for shaping the heel or back part of the upper.
  • the central assembly 2 comprises a slide 5 movable longitudinally on a transversely movable carriage 6.
  • This carriage is adapted to travel on a track 7 rigid with a fixed frame structure 8.
  • means (not shown) are provided for locking the carriage 6 against motion during the upper-shaping operation.
  • the slide 5 carries a fixed rod 9 and a pivot rod 10 fulcrumed at 12 and connected tothe piston rod of a control unit or jacks 13 of the piston-and-cylinder type.
  • the aforesaid rods 9 and 10 are adapted to be inserted into corresponding bores formed in the back portion of a last 14.
  • this last 14 is of the type described and illustrated in the French Pat. No. 2,131,098 mentioned hereinabove. It is locked in position by altering the relative spacing of the pair of rods 9, 10 under the control of jack 13.
  • slide 5 is connected to another fluidactuated cylinder-and-piston unit or jack 31 adapted to shift this slide 5 longitudinally in relation to the assembly 3 for shaping the toe or fore part of the upper.
  • the front assembly 3 comprises a die 15 carried by a support 16 fulcrumed at 17 to a base plate 11 vertically adjustable in relation to the frame structure 8.
  • This assembly 3 further comprises a plurality of cylinder-andpiston units or jacks 18 disposed all around the die 15 and adapted to press the marginal portions of the upper against this die, another fluid-actuated unit or jack 19 adapted to engage the toe end of the upper, and finally a cylinder-and-piston unit or jack 20 for actuating a pair of folding plates or jaws 22.
  • the rear assembly 4 intended for shaping the back or heel portion of the upper comprises a die 23 fitted in a holder 24 secured to the outer end of the piston rod ofa cylinder-and-piston unit or jack 25 having its cylinder carried by a support 23 movable longitudinally in relation to the frame structure 8 of the apparatus.
  • the holder 24 is also rigid with the cylinder of another jack 26 having its piston rod adapted to actuate a pair of folding plates or jaws 27.
  • the dies 15 and 23 are produced by casting on a pattern of the desired article a self-hardening polymer of the type developing a polyaddition or polycondensation reaction process. These exothermic reactions permit of producing dies without any destruction of materials, such as leather, constituting the pattern on which the dies are molded. The exothermic reaction may be adjusted, e.g., by modifying the catalyst percentage.
  • the apparatus according to this invention is adjusted in conformity with the last to be used therein.
  • the lower face of the insole 29 fitted on the last i.e., on the upper face of this last as seen in FIGS. 1 and 2 is first made level with the upper face of die 23 by adjusting nuts 28 on the screw-threaded rods 9 and 10.
  • the base plate 11 is adjusted verti cally while the support 16 is adjusted by pivoting same about its fulcrum pin 17 so that the top surface of die 15 becomes coplanar with the face of insole 29 hearing against the last, then in its closed position.
  • the insole 29' is fitted to the last 14.
  • the fore part of the upper 30 is placed on the die 15 and retained thereon by means of clamping jacks 18, as shown in FIG. 3.
  • Slide 5 is moved by means ofjack 31 toward the assembly 3, as shown by arrow 34; then the last 4 with its insole 29 is introduced into the upper and mounted on the pair of rods 9 and 10, and locked in position by means of jack 13.
  • Slide 5 is moved back toward the assembly 4 by a jack 31 (arrow 35), approaching its initial position to an extent depending of course on the shoe size of the last.
  • the jack 19 is supplied with fluid under pressure to that its piston rod will bear against the toe part of the last 14 for pressing same into the die 15.
  • the fore part of the last 14 will thus engage the confronting portion of upper 30 and thus cause the latter to conform to the concavity of die 15.
  • the jacks l8 restrain the slippage of the marginal portions of the upper in the direction of the arrows 32 of FIG. 4.
  • the piston rods of units 18 are retracted while the jaw-actuating jack 2t) is supplied with fluid under pressure for actuating the folding plates 22. In conventional fashion these plates 22 fold the forward parts of the marginal connecting portions 33 of upper 30 over the insole 29 until they assume the position illustrated in FIG. 6, in which they are maintained by cementing or otherwise.
  • the jack is supplied with fluid in order to move the holder 24 in the direction of the arrow 34 of FIG. 2 and bring the die 23 against the upper 30, engaging the confronting heel portion of last 14.
  • the back part of the upper is shaped between the last 14 and die 23 as shown in FIG. 8.
  • the jaw-actuating jack 26 is then operated to cause the folding plates 27 to turn the rear parts of the marginal portions 33 around the back portion of the insole 29.
  • the carriage 6 Upon completion of the upper-shaping operation performed by means of this apparatus, the carriage 6 is moved along its track toward other stations where complementary assembling operations are accomplished.
  • An apparatus for fitting a shoe upper around a last comprising:
  • a front assembly on said structure adjacent said central assembly including movable first die means with a first concavity matingly confronting a fore part of the mounted last, releasable clamping means on said first die means for engaging opposite marginal portions of a forward part of a shoe upper spanning said first concavity, and first pressure means engageable with said fore part of the last for forcing same into said first concavity to deform said forward part of the shoe upper, said first die means being provided with first jaw means operable to fold said marginal portions of said forward part over the sole of the inverted last upon release of said clamping means; and
  • a rear assembly on said structure adjacent said central assembly including movable second die means with a second concavity confronting a back part of the mounted last and second pressure means for displacing said second die means toward said central unit to deform a rear part of the shoe upper between said back part of the last and said second concavity, said second die means being provided with second jaw means operable to fold opposite marginal portions of said rear part of the shoe upper over the sole of the inverted last.
  • clamping means comprises a set of fluid-operated jacks.

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US00238565A 1971-04-06 1972-03-27 Apparatus for fitting shoe uppers Expired - Lifetime US3798694A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7113208A FR2133252A5 (it) 1971-04-06 1971-04-06

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US3798694A true US3798694A (en) 1974-03-26

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US (1) US3798694A (it)
CA (1) CA967311A (it)
DE (1) DE2210012A1 (it)
ES (1) ES400218A1 (it)
FR (1) FR2133252A5 (it)
GB (1) GB1376463A (it)
IT (1) IT947660B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019706A1 (de) * 1990-06-21 1992-01-02 Bima Maschinenfabrik Gebr Bied Kombinationsgeraet zur vorformung von schuhschaeften

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1110323A (en) * 1911-05-22 1914-09-15 United Shoe Machinery Ab Method of manufacturing boots and shoes.
US1135946A (en) * 1906-06-07 1915-04-13 United Shoe Machinery Ab Method of making shoes.
US1388120A (en) * 1919-09-08 1921-08-16 United Shoe Machinery Corp Method of making shoes
US3422474A (en) * 1966-02-18 1969-01-21 Jacob S Kamborian Method and apparatus for use in lasting shoes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1135946A (en) * 1906-06-07 1915-04-13 United Shoe Machinery Ab Method of making shoes.
US1110323A (en) * 1911-05-22 1914-09-15 United Shoe Machinery Ab Method of manufacturing boots and shoes.
US1388120A (en) * 1919-09-08 1921-08-16 United Shoe Machinery Corp Method of making shoes
US3422474A (en) * 1966-02-18 1969-01-21 Jacob S Kamborian Method and apparatus for use in lasting shoes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019706A1 (de) * 1990-06-21 1992-01-02 Bima Maschinenfabrik Gebr Bied Kombinationsgeraet zur vorformung von schuhschaeften

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Publication number Publication date
ES400218A1 (es) 1975-07-01
CA967311A (en) 1975-05-13
FR2133252A5 (it) 1972-11-24
GB1376463A (en) 1974-12-04
DE2210012A1 (de) 1972-10-12
IT947660B (it) 1973-05-30

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