US3881205A - Last for the manufacture of shoes - Google Patents

Last for the manufacture of shoes Download PDF

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Publication number
US3881205A
US3881205A US354534A US35453473A US3881205A US 3881205 A US3881205 A US 3881205A US 354534 A US354534 A US 354534A US 35453473 A US35453473 A US 35453473A US 3881205 A US3881205 A US 3881205A
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US
United States
Prior art keywords
last
core
neck
marking
constructed
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
US354534A
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English (en)
Inventor
Herbert Funck
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.)
DR ING FUNCK & Co KG GmbH
Original Assignee
Individual
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
Priority claimed from DE19722221905 external-priority patent/DE2221905A1/de
Priority claimed from DE19722229307 external-priority patent/DE2229307A1/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3881205A publication Critical patent/US3881205A/en
Assigned to DR. ING. FUNCK GMBH & CO. KG. reassignment DR. ING. FUNCK GMBH & CO. KG. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE MAY 14, 1984 Assignors: DR. ING. FUNCK KOMMANDITGESELLSCHAFT
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D3/00—Lasts
    • A43D3/02—Lasts for making or repairing shoes
    • A43D3/026—Lasts for making rubber footwear or for vulcanizing rubber soles to footwear

Definitions

  • This invention relates to lasts for the manufacture of shoes.
  • the lasts must satisfy different requirements because of the different loadings and manipulations in or between individual operating stations. They must be provided with retaining elements adapted to co-operate with the gripping or clamping elements of the conveying or operating stations to permit rapid clamping and precise location of the lasts in the operating stations. In order to ensure good sealing between the sole shape and the uppers in the soling machine the lasts must also have sufficient elasticity but only as much as will reliably avoid deformation resulting from the pressures which occur in soling. Marking of the appropriate last sizes or shapes is also appropriate for automatic conveying and automatic operation of the different stations.
  • the retaining elements which are provided according to the invention on the neck of the last permit the last to be clamped in appropriate gripper elements of conveying devices as well as in retaining means in processing machines.
  • the markings of the particular characteristic values of each individual last are provided for actuating and pre-setting the appropriate elements of the conveying and machining devices, for example the sole shapers. Control device tracers which are actuated by these markings are able to guide the lasts in accordance with the shoes to be produced, for example via branches of the conveying devices and thus supply the shoes to different parallel operating machines.
  • a last which is particularly advantageous with respect to its manufacture and mechanical properties comprises of a resilient reaction foam with a Shore hardness of 50 to 80.
  • Such a last which may be expanded in a synthetic resin mould taken off an existing last offers the further advantage of dispensing with the need for a last buckling device which is otherwise required for hard lasts to enable the shoe to be lasted and stripped respectively because owing to its intrinsic resilience the aforementioned last can be buckled in the joint zone.
  • a last which can be very substantially buckled or better still shortened is necessary for different lasting methods in which the uppers are completed with shaft and insole prior to the lasting operation.
  • a last according to the invention is particularly suitable for such lasting methods, the last comprising a front part and a heel part of soft-resilient material and in which both parts are relatively slidably joined to each other by means of a guideway of dovetail construction which extends at an angle.
  • a last which can be shortened as described above may be produced in simple manner in one of two parts being first cast in a separate part mould and after the said part is cured is inserted into a full mould and the second part is formed thereafter while forming the guideway by filling the remaining mould cavity.
  • the upper part of the neck, in which the markings and the retaining elements are disposed is constructed of strong plastics or of metal on which the reaction foam is cast or adhesively fixed. It may however also be advantageous to construct the last in three parts, a front part and a heel part being slidingly connected via inclined dovetailed guideways to a wedge-shaped middle part which supports the neck and the markings.
  • the middle part in this case is preferably constructed of a hard resilient material, for example a hard plastics or metal.
  • An embodiment of a last incorporating a resistant last core which is integral with the last neck and is surrounded, at least in the zone of the shoe, on all sides and firmly by a resilient stratum of material is particularly advantageous to reduce the curing times and therefore to accelerate the production process.
  • a last core preferably constructed of a hard material, a foam substance or a resilient plastics material, reduces the thickness of the resilient material stratum which is produced when the last is formed thus resulting in substantially improved heat dissipation and as a consequence reduced curing times for the last.
  • the said core comprises two parts which are slidably joined to each other by means of connections which are preferably of dovetail construction and extend at an angle.
  • a process in which the core of the last is located in the interior of a last mould while forming an all-around space between the wall of the last mould and the external surface of the core, the said open space being then filled with a solidifying compound, is particularly suitable for producing a last of the kind described above.
  • the stratum which fills the space between the core and the last mould is cut along the sliding planes of the core parts after the said straturn has solidified and after the last is stripped from the mould.
  • the two core parts are also constructed of thermoplastics material, they may be advantageously produced in such a way that one part is inserted into a fixed core mould and the mating part is then produced thereafter by casting a thermoplastics material into the remaining cavity while forming the dovetail-shaped connection.
  • FIG. 1 is a partially sectioned side view of a first embodiment of a last with the clamping device of an operating station;
  • FIG. 2 is a side view of a two-part last according to the invention.
  • FIG. 3 is a last according to the invention and comprising a front part, a middle part and a heel part,
  • FIG. 4 is a further embodiment of a last according to the invention inserted into a casting mould and shown as a partially sectioned side view.
  • the last 1 shown in FIG. 1 comprises a lower foot part 2 and an upper extension which is constructed as the neck 3.
  • the neck contains retaining elements in the form of a frontal notch 4 and a rear recess 5.
  • Corresponding elements on the diagrammatically illustrated operating station 6 co-operate with the aforementioned retaining elements, a tooth 7 engaging in the frontal notch 4 and a nose of a movable actuating element 9 engaging into the rear recess 5.
  • the retaining elements of the last may however also take the form of pins, bolts, slots or the like which then co-operate with corresponding mating elements of the operating or conveying stations.
  • Marks 10, 11 which characterise a specific size and shape of last are formed at the upper endface of the last neck 3.
  • the appropriate operating station or conveying device respectively is provided with mating marks, for example in the form of vertical bores 13 with associated transverse bores into which the appropriate marks 10, 11 of the last engage.
  • transverse pins 15 By inserting transverse pins 15 into the transverse bores, it is possible to block those mating marks in the appropriate operating station which do not correspond to the predetermined last sizes.
  • only the transverse bore 14 is open for receiving the size mark 11 and all subsequent mating marks are blocked by transverse pins. This convenient and simple device ensures that only the last for Whose size the operating station is set up can be gripped and positionally located by the retaining devices or clamping devices of the affected station.
  • the last according to FIG. 1 is provided with the mark by means of which a pin 12 is raised which slides in a bore so that other characteristic values of the last, for example its width or its expansion can be indicated or traced.
  • the said pin 12 may be constructed as the actuating element of a mechanical or electrical control device which controls either the travel of the last to different operating stations or controls the operating stations in accordance with the characteristic values of the incoming or clamped last.
  • the embodiment illustrated in FIG. 2 relates to a resilient last comprising a front part 16 and a heel part 17. Both parts are connected to each other by means of an inclined slide way 18 through which the last may be shortened by downward pulling of the frontal part.
  • the neck 3 of the last is provided with retaining elements, constructed as bolts 19, 20 which engage in corresponding bores of the last retaining means of the operating station but which are not shown.
  • the endface of the neck 3 is provided with marks 21 for marking the size of the last.
  • the other marks 22 for indicating further characteristic sizes of the last, such as width and expansion are provided in this embodiment in the form of pins 22, disposed in an offset configuration on one or both sides of the neck 3 instead of being provided on the endface of the last.
  • FIG. 3 shows a further embodiment of a last comprising of a wedge-shaped middle part 25 on which a heel part 26 and a front foot part 27 is slidably mounted via two dovetailed slide ways 28, 29.
  • the last can be shortened by sliding the front part and/or the heel part downwardly to facilitate fitting of the uppers. Because of this shortening facility, the last according to the embodiment illustrated in FIGS. 2 and 3 are particularly suitable for use in California or moccasin lasting.
  • the slidable parts 26 and 27 of the embodiment of a last illustrated in FIG. 3 are constructed of a soft resilient reaction foam while the middle part 25 on which the neck 3 with the retaining elements and markings is disposed, is constructed of a hard resilient material.
  • a last of this kind may be produced in simple manner by placing a prefabricated middle part into a solid mould and the remaining cavities are then filled thereafter with resilient material, more particularly a reaction foam.
  • the last 1 illustrated in FIG. 4 is provided with a stable, two-part core 32, 33 the shoe zone of which is surrounded on all sides by a material stratum 34.
  • the two parts 32 and 33 of the core are mounted upon each other by means of a dovetailed keyway connection 35 so as to slide relative to each other at an angle to permit shortening of the last, for example to facilitate fitting of the uppers.
  • the last is disposed in a last mould 36 comprising a plurality of parts and being provided with a casting aperture 37 for receiving the material which forms the resilient stratum 34.
  • the core and/or the mould is provided with a sealing zone 38.
  • the last is completely divided into two after forming and solidification of the completely resilient stratum of material by applying a cut 39.
  • the strength of the joint between the resilient outer stratum and the core material may be improved by adhesive means or suitable self-adhesive materials and/or by roughening of the external surfaces of the core.
  • a last for the production of shoes comprising a core portion, said core portion including a neck extending therefrom, retaining element means on said neck for rapid detachable clamping of said last in shoe making machines and conveying devices, and at least one marking on said neck, which marking comprises means for transmitting to said shoe making machines a particular characteristic of said last and for causing said shoe making machines to automatically respond to the particular characteristic of said last, said marking comprising elements which cooperate with corresponding tracing elements of said shoe making machines or conveying devices.
  • a last according to claim 1 having a hard core, constructed integrally with said neck and being surrounded on all sides by a soft resilient material stratum in the zone which contacts a shoe.
  • the core comprises two core parts which are slidably connected to each other by means of dovetailed connections which extend at an angle.
  • a last according to claim 1 having a frontal, soft resilient part slidably connected via an inclined, dovetail-shaped slide way to said core.
  • a last according to claim 1 having a frontal part and a heel part slidingly connected via inclined, dovetail-shaped guideways to a wedge-shaped hard core.
  • the last of claim 1 including at least one marking which comprises means for actuating control device tracers on said conveying devices.
  • said marking comprises means for notifying said shoe making machines of said lasts width characteristic.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US354534A 1972-05-04 1973-04-26 Last for the manufacture of shoes Expired - Lifetime US3881205A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722221905 DE2221905A1 (de) 1972-05-04 1972-05-04 Leisten zur herstellung von schuhen und verfahren zu seiner herstellung
DE19722229307 DE2229307A1 (de) 1972-06-15 1972-06-15 Leisten zur herstellung von schuhen mit einem aus dem oberschuh herausragenden leistenhals und verfahren zu seiner herstellung

Publications (1)

Publication Number Publication Date
US3881205A true US3881205A (en) 1975-05-06

Family

ID=25763206

Family Applications (1)

Application Number Title Priority Date Filing Date
US354534A Expired - Lifetime US3881205A (en) 1972-05-04 1973-04-26 Last for the manufacture of shoes

Country Status (5)

Country Link
US (1) US3881205A (enrdf_load_stackoverflow)
CA (1) CA971313A (enrdf_load_stackoverflow)
FR (1) FR2183515A5 (enrdf_load_stackoverflow)
GB (1) GB1375138A (enrdf_load_stackoverflow)
IT (1) IT982831B (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2718328A1 (de) * 1976-07-14 1978-01-26 Z Przesneho Strojirenstvi Gott Anordnung fuer ein selbsttaetiges einstellen der lage von arbeitsmechanismen an schuhmaschinen, insbesondere von einer spannvorrichtung fuer fersen und gelenkstuecke
US4741062A (en) * 1985-09-06 1988-05-03 Roger Blanc Last for automated shoe manufacture
USD374553S (en) 1995-02-28 1996-10-15 James L. Throneburg Shoe last
US5595005A (en) * 1993-07-23 1997-01-21 James L. Throneburg Footwear system
US5724753A (en) * 1993-07-23 1998-03-10 James L. Throneburg Footwear system
US5881413A (en) * 1995-02-28 1999-03-16 James L. Throneburg Shoe last and method of constructing a shoe
WO2000060973A1 (en) * 1999-04-12 2000-10-19 Overseas Patents And Systems Ltd. Method for completion of footwear and shoe filler
US20180146748A1 (en) * 2015-05-29 2018-05-31 Nike, Inc. Pressing fixture for use in making articles of footwear
US20210368947A1 (en) * 2019-12-20 2021-12-02 Asics Corporation Method of manufacturing shoe upper, shoe upper, and shoe
CN113800258A (zh) * 2021-09-17 2021-12-17 温州市华炜鞋材科技有限公司 鞋楦标准模架和鞋楦智能抓取装置和其使用方法
US11330870B2 (en) * 2013-10-16 2022-05-17 Adidas Ag Three-dimensional shoe manufacturing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451720A1 (fr) * 1979-03-22 1980-10-17 Saint Marcel Mfg Procede de fabrication de joints d'etancheite pour formes d'articles chaussants, de formes de montage et formes ainsi obtenues
GB8804246D0 (en) * 1988-02-24 1988-03-23 Shoemakers Ltd Improvements relating to manufacture of shoes
FR2994637B1 (fr) * 2012-08-21 2015-08-21 Bourdier Henri Joseph Dispositif permettant d'adapter la forme interieure des chaussures, non compris la voute plantaire de celle-ci, a la forme des pieds auxquelles elles sont destinees

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806233A (en) * 1955-09-26 1957-09-17 United Shoe Machinery Corp Lasts
US2850752A (en) * 1956-09-07 1958-09-09 United Shoe Machinery Corp Reinforced plastic structures
US3089162A (en) * 1960-12-29 1963-05-14 Svit Np Automatic shoe last operating device
US3228048A (en) * 1966-01-11 Manufacture of shoemakersx l lasts
US3705433A (en) * 1970-03-06 1972-12-12 Usm Corp Foot form and shoemaking method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3228048A (en) * 1966-01-11 Manufacture of shoemakersx l lasts
US2806233A (en) * 1955-09-26 1957-09-17 United Shoe Machinery Corp Lasts
US2850752A (en) * 1956-09-07 1958-09-09 United Shoe Machinery Corp Reinforced plastic structures
US3089162A (en) * 1960-12-29 1963-05-14 Svit Np Automatic shoe last operating device
US3705433A (en) * 1970-03-06 1972-12-12 Usm Corp Foot form and shoemaking method

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2718328A1 (de) * 1976-07-14 1978-01-26 Z Przesneho Strojirenstvi Gott Anordnung fuer ein selbsttaetiges einstellen der lage von arbeitsmechanismen an schuhmaschinen, insbesondere von einer spannvorrichtung fuer fersen und gelenkstuecke
US4741062A (en) * 1985-09-06 1988-05-03 Roger Blanc Last for automated shoe manufacture
US5595005A (en) * 1993-07-23 1997-01-21 James L. Throneburg Footwear system
US5724753A (en) * 1993-07-23 1998-03-10 James L. Throneburg Footwear system
USD374553S (en) 1995-02-28 1996-10-15 James L. Throneburg Shoe last
US5881413A (en) * 1995-02-28 1999-03-16 James L. Throneburg Shoe last and method of constructing a shoe
US5909719A (en) * 1995-02-28 1999-06-08 James L. Throneburg Shoe last and method of constructing a shoe
WO2000060973A1 (en) * 1999-04-12 2000-10-19 Overseas Patents And Systems Ltd. Method for completion of footwear and shoe filler
US11330870B2 (en) * 2013-10-16 2022-05-17 Adidas Ag Three-dimensional shoe manufacturing
US20180146748A1 (en) * 2015-05-29 2018-05-31 Nike, Inc. Pressing fixture for use in making articles of footwear
US20210368947A1 (en) * 2019-12-20 2021-12-02 Asics Corporation Method of manufacturing shoe upper, shoe upper, and shoe
CN113800258A (zh) * 2021-09-17 2021-12-17 温州市华炜鞋材科技有限公司 鞋楦标准模架和鞋楦智能抓取装置和其使用方法

Also Published As

Publication number Publication date
IT982831B (it) 1974-10-21
FR2183515A5 (enrdf_load_stackoverflow) 1973-12-14
CA971313A (en) 1975-07-22
GB1375138A (enrdf_load_stackoverflow) 1974-11-27

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AS Assignment

Owner name: DR. ING. FUNCK GMBH & CO. KG.

Free format text: CHANGE OF NAME;ASSIGNOR:DR. ING. FUNCK KOMMANDITGESELLSCHAFT;REEL/FRAME:004308/0243