EP0949060A1 - Structure cousue resistante aux fuites, son procede de creation et son dispositif de traitement thermique - Google Patents

Structure cousue resistante aux fuites, son procede de creation et son dispositif de traitement thermique Download PDF

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Publication number
EP0949060A1
EP0949060A1 EP96938514A EP96938514A EP0949060A1 EP 0949060 A1 EP0949060 A1 EP 0949060A1 EP 96938514 A EP96938514 A EP 96938514A EP 96938514 A EP96938514 A EP 96938514A EP 0949060 A1 EP0949060 A1 EP 0949060A1
Authority
EP
European Patent Office
Prior art keywords
sewn
sewn structure
seam
precursory
hot
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.)
Withdrawn
Application number
EP96938514A
Other languages
German (de)
English (en)
Other versions
EP0949060A4 (fr
Inventor
Masami Kamiya
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.)
Asahi Kasei Corp
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
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 Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Publication of EP0949060A1 publication Critical patent/EP0949060A1/fr
Publication of EP0949060A4 publication Critical patent/EP0949060A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B9/00—Footwear characterised by the assembling of the individual parts
    • A43B9/02—Footwear stitched or nailed through
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0205—Uppers; Boot legs characterised by the material
    • A43B23/0215—Plastics or artificial leather
    • A43B23/022—Plastics or artificial leather with waterproof breathable membranes
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0245—Uppers; Boot legs characterised by the constructive form
    • A43B23/025—Uppers; Boot legs characterised by the constructive form assembled by stitching
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B23/00—Uppers; Boot legs; Stiffeners; Other single parts of footwear
    • A43B23/02—Uppers; Boot legs
    • A43B23/0245—Uppers; Boot legs characterised by the constructive form
    • A43B23/0295—Pieced uppers
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D11/00—Machines 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
    • A43D11/12—Machines for forming the toe part or heel part of shoes, with or without use of heat

Definitions

  • a trekking shoe is a three dimensionally shaped sewn article with a specific structure and shape which is fabricated by laminating a plurality of sheet including waterproof sheet material and sewing them together.
  • a three dimensionally shaped sewn structure as exemplified by trekking shoes are further provided with a waterproof finish at the joining seam portion and patch seam portion.
  • the following conventional waterproof finish have been employed singly or in combination:
  • the coated resin layer on the surface of an article such as shoes may spoil the appearance of the article, the resin layer formed inside of the shoes may spoil wears comfort.
  • the application of the coating is not advantageous because the end-use product lacks waterproofness and durability.
  • the adhesive taping technique there is a problem similar to that encountered in the case where application of the coating is made on the inner surface of a shoe.
  • a water repellent finish it is difficult to provide a seam portion in a shoe with a waterproof property as high as those exhibited by the sheet material for a shoe upper.
  • rain wear and bag are made by welding (or-fusion-bonding) material such as thermoplastic sheet, woven fabric, film and the like using a high frequency heating technique.
  • welding or-fusion-bonding
  • thermoplastic sheet such as thermoplastic sheet, woven fabric, film and the like
  • a high frequency heating technique it is necessary that a workpiece and the electrode are in close contact in order to attain uniform heating and fusion.
  • Using a conventional high frequency heating technique it is impossible to apply efficient high frequency heating to a sewn seam structure having many curved surfaces and unevenly thick walled portions.
  • the object of the invention is to provide a sewn structure containing joining seam portion which exhibits waterproof performance.
  • a still further object of the invention is to provide an easy and simple method for forming a waterproof seam in a sewn structure having the above mentioned curved configuration, and to provide an apparatus for carrying out the foregoing method assuredly in a simple operation.
  • the object of the invention can be achieved basically by a waterproof sewn structure comprising a face sheet member and a back sheet member, the members being sewn together by a seam with a hot-melt resin interposed therebetween, the sewing needle holes forming the seam filled with a portion of the hot-melt resin so that the sewing thread is embedded in the hot-melt resin, and at least the face sheet member comprising a waterproof sheet material.
  • a sewn structure refers to a sewn article made by sewing cut-out sheet members of materials, for example, leather, fabric and flexible synthetic resin sheet, which are used for manufacturing shoes, footwears, hats or hood bodies, gloves and rucksacks, and the cut-out sheet member constituting outer covering or outer shell should be a waterproof sheet material.
  • the face sheet member constituting an article of the sewn structure should be either waterproof finished or water-repellent finished when they are permeable or semi-permeable with water.
  • the face sheet member can be either a member for covering the whole surface of an article, or a decorative piece, depending on the embodied mode of an article.
  • the face sheet member is a lining material corresponding to ground material, outer covering material or the like.
  • a sheet material constituting a back sheet member can be selected in accordance with an objective use.
  • use is made of a material with due consideration of properties in moisture absorption, texture, resilience and hand touch.
  • a laminated sheet in which a flex-foamed resin sheet is laminated with either a woven fabric or a knitted fabric, may be used.
  • the hot-melt resin film is used in a minimum thickness so that the above mentioned functions can be attained.
  • an appropriate dimension of the thickness is selected in a range where a sewn structure is not broken by a mechanical shock or impact, for example, mechanical bending or mechanical extension, encountered in an end use article.
  • the thickness should be as small as possible as long as the watertight function is obtained.
  • the sewn structure according to the invention is provided with a waterproof structure for preventing penetration of water through the stitching needle holes into the interior of the sewn structure and from the outer side to the reverse side of the structure and, further, through the lapped portion of face and back sheet members into the inner of the sewn structure.
  • the sewn structure according to the invention can be prepared basically by a method including the following steps:
  • the hot-melt resin sheet as referred to in the invention is a shaped article in the form of, for example, fabric and film, and is composed of a thermoplastic resin composition capable of developing an adhesive property to the face and back sheet members and the sewing thread, and can flow when it is melted in such a degree that the melted resin can penetrate into the stitching needle holes of the seam contained in the precursory sewn structure.
  • the hot-melt adhesive resin should be a material which can be melted to flow at a temperature at which the face and back sheet members as well as a sewing thread will not be broken, or deteriorated in their mechanical properties and texture at normal temperature, and should be a material capable of being melted by means of application of a high-frequency current in a condition under which the face and back sheet members and the sewing thread are not melted.
  • the hot-melt resin sheet such as described above is selected from synthetic resins such as polyamide, polyesters, polyvinyl chloride, polyurethane, polyvinyl acetate and polyacrylics and the like which have a low melting point of from 90°C to 170°C.
  • a value of dielectric power factor for the resin sheet is selected as about 1.7 times to 4.3 times greater than those of a face sheet member, a back sheet member and a sewing thread.
  • a precursory sewn structure is prepared by inserting a hot-melt adhesive resin sheet in a sandwich-like form between a face sheet member and a back sheet member, and subsequently sewing the three pieces together to form a desired seam using a sewing thread.
  • a precursory sewn structure (precursor of sewn structure) prepared as described above is set between a pair of flat plate electrodes disposed with the face opposing each other in parallel on a conventional high-frequency heating apparatus, and then a high-frequency voltage is applied to the electrodes in accordance with a conventionally known condition in order to make only the hot-melt adhesive sheet melt so that the melted resin penetrate into the stitching needles holes of a seam thereby forming a watertight layer along a seam line.
  • the precursory sewn structure is preferably pressed at least on one of the surfaces in the direction of thickness by means of an interposition of an elastic pressing sheet of flexible sheet material having a dielectric power factor of 0.002 to 0.02 and a product of a dielectric constant and a dielectric power factor of 0.006 to 0.09.
  • an elastic pressing sheet of flexible sheet material having a dielectric power factor of 0.002 to 0.02 and a product of a dielectric constant and a dielectric power factor of 0.006 to 0.09.
  • a precursory sewn structure is finished, for example, into a shoe
  • the precursory sewn structure is pressingly held between a conductive metal mold with the face curving along the line of a seam in a curved surface configuration of a shoe, for example, the shoe upper portion and heel portion, and a conductive metal clamp with the face opposed against the curving face of the mold, and that a high-frequency voltage is applied to the metal mold and the conductive clamp so that the an intermediate layer of hot-melt adhesive resin sheet is selectively heated to melt.
  • the seam line contained in the curving surface of the precursor of the sewn structure is evenly provided with an applied voltage and formation of a three dimensionally shaped sewn structure having a prescribed waterproof sewn structure can be attained without fail.
  • the seam is generally formed by lock stitch type seam.
  • special lock seam for example, a two-needled lock stitch seam, zigzag stitch seam, inseam sewing, twin chain stitches seams including twin zigzag stitch seam, covering chain, stitches and the like.
  • a sewn structure of the invention can be in various forms of fabricated products.
  • a sewn structure of the invention in which leather or fabric is used as the face sheet member can make a footwear, gloves for skier, a hat and a tent which contains a sewn portion having exceeding high waterproof function.
  • the decorative workpieces (As), (Bs) and (Cs) are sewn to portions (Ab), (Bb) and (Cb) of back sheet member (3) as the lining member with interpositions of hot-melt adhesive resin sheet in the form of a tape put between by means of prescribed seam (7) to prepare a precursory sewn structure to which a high-frequency heat treatment hereinafter explained is applied for molding it into a prescribed form.
  • the sewn portions are provided with a waterproof function along the seams by virtue of formation of films of the adhesive resin during the high-frequency heat treatment.
  • the tapes of hot-melt adhesive resin sheet which are cut in a width of 10 mm to 15 mm in conformity with the line of seam for the decorative workpieces, and the tapes are inserted with the ends flushed with the edges of decorative sheet members, and the layers are sewn together.
  • the seam (7) which is formed, for example, by a lock stitch type sewing machine (stitching pitch 3.5 needles/cm) consists of a couple of stitching lines; one is along 1.5 mm to 32.0 mm inside from the respective edges of respective decorative sheet and the other is along 2 mm to 5.0 mm inside.
  • a sewn structure of the invention is produced by a step of preparing a precursory sewn structure (1) mentioned above and a step of applying a high-frequency heat treatment to the precursory sewn structure.
  • precursor sewn member (A 1 ) of the sewn structure is prepared by placing a face sheet member (2) over a back sheet member (3) with a hot-melt adhesive resin sheet piece (6) put between and subsequently joining the overlaid pieces together by a seam to produce a sewn laminated sheet structure.
  • Figure 1 (C) illustrates that a cross sectional view of the sewn portion of the precursory sewn structure (A 1 ), and that the seam joining the face sheet member and the back sheet member is invariably formed confining the hot-melt adhesive resin sheet.
  • the hot-melt adhesive resin sheet contains the seam in the face allowing a sufficient margin and is preferably laid in a band-like form along the seam. It is not necessary to sew together the hot-melt adhesive resin sheet together away from a seam.
  • the high-frequency heating can be done using a conventional heating apparatus, for example, a high-frequency welding apparatus.
  • An application of high-frequency voltage make only the hot-melt adhesive resin in the precursory sewn structure flow under a condition corresponding to what is called, an interfacial adhesion heating method.
  • a high-frequency heating system for a precursory sewn structure is illustrated.
  • a high-frequency heating apparatus which comprises a press-heating unit comprising an electro-conductive mold (10) having a mold face along the face sheet member of precursory sewn structure (A 1 ) and an upper conductive mold (11) (this may be called as conductive clamp) for supporting or pressing the precursory sewn structure on its opposing face; a high-frequency current generating device (13) and a cable (12) for connecting the press-heating unit and the high-frequency current generating device, the precursory sewn structure (A 1 ) is held under uniform pressure between conductive mold (10) and conductive upper mold (11).
  • Holding a precursory sewn structure as described herein means that the precursory sewn structure is closely laid with the surfaces of the face sheet member and the back sheet member between conductive mold (10) and the upper conductive mold as shown in Figure 4 (see, arrow mark). This is invariably done regardless of whether the precursory sewn structure is to be shaped into a flat piece article ( Figure 4 (A) shows heating by a flat mold.) or a three dimensionally shaped article which is to be shaped into an article with a curved surface configuration using a mold with a curving mold face as shown in Figures 4 (B) and (C).
  • the surfaces of conductive mold (10) for holding the precursory sewn structure and conductive upper mold (11) are required to have a shape corresponding to the contours or configuration of the objective article of a precursory sewn structure, especially to have a surface shape along the outer configuration of the objective article.
  • FIG. 5 Figure 6 and Figure 7, a preferred structure of heating apparatus for shaping a precursory sewn structure into an solid shaped article is now explained.
  • a three dimensionally shaped article is represented in the form of a shoe, and especially a precursory sewn structure which is intended to be fabricated into the shoe upper member containing the vamp, heel, quarter, the counter and toe cap before the sole is joined thereto is set on a high-frequency heat finishing apparatus.
  • precursory sewn structure (A 1 ) is a shoe
  • three pieces of horizontally movable clamps (11a), (11b) and (11c) are disposed in three directions around conductive mold (10) to make a U-shaped arm arrangement and that the clamps has a total length of 50 - 80 cm, a width of 3 - 5 cm and a height of 5 - 10 cm.
  • Material for a conductive clamp is not limitative so far as it is an electrically conductive material.
  • a clamp made of aluminum is preferred as in the conductive mold stated above.
  • a method of holding precursory sewn structure (A 1 ) by conductive clamps (11a), (11b) and (11c) use is generally made of a method in which the precursory sewn structure is pressed by means of manually operated levers (14a), (14b) and (14c) which are attached to the respective conductive clamps.
  • the holding can be carried out automatically by applying a pressure on the respective clamps by means of air cylinders connected with a compressor. Pressing force for holding the precursory sewn structure varies depending on kind of a precursory sewn structure; the pressing force may range preferably from 1.0 - 4.0 kg/cm 2 in the case of making a shoe.
  • Precursory sewn structure (A 1 ) is fitted in conductive mold (10) and an elastic pressing sheet (15) is then disposed on or under the precursory sewn structure.
  • elastic pressing sheet (15) is pressed so as to absorb curvature and roughness of the surface of the precursory sewn structure and thus can contact closely with the surface of the precursory sewn structure.
  • metal plate (16) contacts conductive clamps (11a), (11b) and (11c), and is charged with a high-frequency electricity from high-frequency generating device (13) so that the precursory sewn structure is brought to be heated. So long as at least a portion of metal plate (16) is in contact with clamps (11a), (11b) and (11c), namely, even in a case where the metal plate is not fully in close contact with the clamps, a high-frequency voltage can be evenly charged to metal plate (16), and in consequence, hot-melt adhesive resin sheet (6a) can be melted within the precursory sewn structure which is closely held on metal plate (16) by an elastic sheet laid between. In other words, metal plate (16) is not necessarily kept in close contact with the entire surface of the conductive clamps. It is adequate that metal plate (16) is kept in contact with a portion of respective conductive clamps (11a), (11b) and (11c).
  • elastic pressing sheet (15) plays a role as buffering material to precursory sewn structure (A 1 ) having the curved surface and rough surface and metal plate (electrode), and smooths out the curved or rough contours occurring in the surface of precursory sewn structure (A 1 ), and conducts heat evenly to the sewn part of precursory sewn structure (A 1 ) thereby preventing occurrence of non-uniform melting of the hot-melt resin sheet (6).
  • Figure 6 illustrates an outward view of the aforementioned high-frequency heating apparatus in reference to Figure 5.
  • Figure 7 illustrates an operation in which precursory sewn structure in the form of a shoe workpiece is fitted into conductive mold (10) of which structure is clearly shown in Figure 6. Both the surfaces of the shoe workpiece is pressed with an elastic pressing sheet (15) put between while a high-frequency voltage is applied to the precursory sewn structure.
  • base plate (17) is a support frame on which conductive mold (10), upper conductive molds or conductive clamps (11a), (11b) and (11c) and the like means are mounted with an insulating plate (not shown) made of a material such as Teflon, Duracon and the like interposed therebetween.
  • a voltage of 3 - 5 KW is applied to the conductive mold as input terminal (positive terminal) and the conductive clamp as output terminal (negative terminal).
  • an electric current of normally, 0.4 - 0.9A, preferably 0.7 - 0.8A is charged for a period of 3 - 18 seconds, preferably 5 - 15 seconds, although it varies in accordance with an area of sewn portion.
  • a shoe upper piece with a soft sewn portion which is capable of blocking off water such as rain water and the like passing through the needle holes and the gaps formed between the face material and the back face materials can be obtained.
  • the water repellent finished cattle leather member and the waterproof laminated fabric member no observable change was found in the resultant shoe upper piece.
  • the portion of the melted resin tape chokes or fills at least the cross-sections of sewing needles of the seam embedding the sewing thread, and bonds adhesively the face and back sheet members. Water resistance of the seam portion contained in the shoe upper piece was 2300 mm H 2 O.
  • the resultant shoe piece contained a soft seam portion.
  • the seam portion contained in the shoe sheet member exhibited a water resistance of 2,200 mm H 2 O.
  • a waterproof sewn structure according to the invention has a sewn structure exhibiting an extremely excellent waterproof performance.
  • the water resistance of the sewn structure are not deteriorated even when the structure is subjected to an external force such as a bending force.
  • a waterproof sewn structure according to the invention has an extensively waterproof sewn structure even when the sewn portion is contained in an shaped article having a curved surface, because only the hot-melt adhesive resin sheet interposed in the sewn structure is melted by applying a high-frequency heating method.
  • a sewn structure of the invention is prepared by the aforementioned method, a uniform heating of the entire body of a three dimensionally shaped article containing a curved surface configuration and and rugged surface can be attained by a single-time application of electricity. Since a hot-melt adhesive resin containing structure of the invention can be produced with an excellent processability without impairing the waterproof fabric.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Sewing Machines And Sewing (AREA)
EP96938514A 1996-05-07 1996-11-20 Structure cousue resistante aux fuites, son procede de creation et son dispositif de traitement thermique Withdrawn EP0949060A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP11275096 1996-05-07
JP11275096 1996-05-07
PCT/JP1996/003403 WO1997042024A1 (fr) 1996-05-07 1996-11-20 Structure cousue resistante aux fuites, son procede de creation et son dispositif de traitement thermique

Publications (2)

Publication Number Publication Date
EP0949060A1 true EP0949060A1 (fr) 1999-10-13
EP0949060A4 EP0949060A4 (fr) 2004-08-25

Family

ID=14594624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96938514A Withdrawn EP0949060A4 (fr) 1996-05-07 1996-11-20 Structure cousue resistante aux fuites, son procede de creation et son dispositif de traitement thermique

Country Status (5)

Country Link
EP (1) EP0949060A4 (fr)
JP (1) JP3253305B2 (fr)
NO (1) NO311914B1 (fr)
TW (1) TW310302B (fr)
WO (1) WO1997042024A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108294410A (zh) * 2017-01-13 2018-07-20 南宝树脂化学工厂股份有限公司 一种利用树脂使鞋面定型及耐磨的方法
FR3095926A1 (fr) * 2019-05-14 2020-11-20 Mfc chaussure et son procédé de démontage
IT202200019359A1 (it) * 2022-09-21 2024-03-21 Marco Ghirardi Apparecchiatura per la lavorazione di tomaie in pelle per calzature
US12305088B2 (en) 2021-12-21 2025-05-20 Bemis Associates, Inc. Waterproof seams and methods of making the same

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Publication number Priority date Publication date Assignee Title
JP2003088404A (ja) * 2001-09-20 2003-03-25 Achilles Corp 導電性防水靴
DE102006022598B4 (de) 2005-10-12 2018-05-30 Papiertechnische Stiftung München Verfahren zur Herstellung einer Keramik aus präkeramischen Papier- oder Pappstrukturen
KR200471577Y1 (ko) 2012-03-20 2014-03-06 쳉-퉁 시아오 신발 상부 구조
CN110026017A (zh) * 2018-01-12 2019-07-19 山东盛华投资有限责任公司 一种胶粘合筒状袋身纵缝的除尘滤袋
JP7346062B2 (ja) * 2019-03-29 2023-09-19 リンテック株式会社 履物及び履物の製造方法
JP2023046027A (ja) * 2021-09-22 2023-04-03 株式会社アシックス アッパー部材及びシューズ
CN114190649B (zh) * 2021-12-22 2022-07-26 广州大草原鞋业有限公司 一种防水登山鞋的制作工艺
CN118680730A (zh) * 2024-07-05 2024-09-24 金仕生物科技（常熟）有限公司 人工假体

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US2528491A (en) * 1947-12-24 1950-11-07 United Shoe Machinery Corp Shoemaking apparatus
US2658213A (en) * 1948-10-22 1953-11-10 United Shoe Machinery Corp High-frequency sole attaching
GB873347A (en) * 1956-10-24 1961-07-26 Baxter Brothers And Company Lt Improvements in or relating to plastic coated or impregnated fabrics
GB870453A (en) * 1957-08-08 1961-06-14 Communications Patents Ltd Improvements in and relating to the seaming of sheet material
GB2071564A (en) * 1980-01-28 1981-09-23 Clares Carlton Ltd Improvements in and relating to the manufacture of protective clothing
FI73011C (fi) * 1983-09-12 1987-08-10 Lasse Liukko Foerfarande foer tillverkning av en soem.
JPH04269901A (ja) 1991-02-23 1992-09-25 Moon Star Co 靴胛被の防水法
JPH06246076A (ja) * 1993-02-25 1994-09-06 Asahi Chem Ind Co Ltd 防水性衣料の製造法
JPH0732510A (ja) * 1993-07-23 1995-02-03 Asahi Chem Ind Co Ltd 防水性靴の製造法
GB9410410D0 (en) * 1994-05-23 1994-07-13 Law Trading Company The Limite Footwear item
JPH0892868A (ja) * 1994-09-27 1996-04-09 Asahi Chem Ind Co Ltd 防水性縫目構造を有する防水布帛およびその製造方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108294410A (zh) * 2017-01-13 2018-07-20 南宝树脂化学工厂股份有限公司 一种利用树脂使鞋面定型及耐磨的方法
FR3095926A1 (fr) * 2019-05-14 2020-11-20 Mfc chaussure et son procédé de démontage
US12305088B2 (en) 2021-12-21 2025-05-20 Bemis Associates, Inc. Waterproof seams and methods of making the same
IT202200019359A1 (it) * 2022-09-21 2024-03-21 Marco Ghirardi Apparecchiatura per la lavorazione di tomaie in pelle per calzature

Also Published As

Publication number Publication date
JP3253305B2 (ja) 2002-02-04
NO985191D0 (no) 1998-11-06
NO985191L (no) 1999-01-07
NO311914B1 (no) 2002-02-18
WO1997042024A1 (fr) 1997-11-13
EP0949060A4 (fr) 2004-08-25
TW310302B (en) 1997-07-11

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