ES2088335B1 - Dispositivo para sellar hojas continuas de material sintetico termoplastico. - Google Patents

Dispositivo para sellar hojas continuas de material sintetico termoplastico.

Info

Publication number
ES2088335B1
ES2088335B1 ES09300843A ES9300843A ES2088335B1 ES 2088335 B1 ES2088335 B1 ES 2088335B1 ES 09300843 A ES09300843 A ES 09300843A ES 9300843 A ES9300843 A ES 9300843A ES 2088335 B1 ES2088335 B1 ES 2088335B1
Authority
ES
Spain
Prior art keywords
synthetic material
thermoplastic synthetic
continuous sheets
sealing
sealing continuous
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 - Fee Related
Application number
ES09300843A
Other languages
English (en)
Other versions
ES2088335R (es
ES2088335A2 (es
Inventor
Friedhelm Mundus
Hans-Ludwig Voss
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of ES2088335A2 publication Critical patent/ES2088335A2/es
Publication of ES2088335R publication Critical patent/ES2088335R/es
Application granted granted Critical
Publication of ES2088335B1 publication Critical patent/ES2088335B1/es
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
    • B29C66/00441—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool movable, e.g. mounted on reels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/003—Protecting areas of the parts to be joined from overheating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/87—Auxiliary operations or devices
    • B29C66/874—Safety measures or devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/16—Surface bonding means and/or assembly means with bond interfering means [slip sheet, etc. ]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1737—Discontinuous, spaced area, and/or patterned pressing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Package Closures (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Making Paper Articles (AREA)
  • Laminated Bodies (AREA)

Abstract

DISPOSITIVO PARA SELLAR HOJAS CONTINUAS DE MATERIAL SINTETICO TERMOPLASTICO DISPUESTAS UNA SOBRE OTRA U HOJAS TUBULARES CONTINUAS DISPUESTAS PLANAS, QUE CONSTA DE REGLETAS SELLADORAS QUE SE PUEDEN CALENTAR MEDIANTE DISPOSITIVOS DE CALEFACCION, QUE SE PUEDEN MOVER UNA HACIA OTRA Y SEPARANDOSE UNA DE OTRA Y SOBRE CUYAS SUPERFICIES FRONTALES SE PUEDE TENDER UNA LAMINA SEPARADORA DE MATERIAL QUE NO SE PEGA CON EL MATERIAL SINTETICO, PREFERENTEMENTE TEFLON.
ES09300843A 1992-04-22 1993-04-22 Dispositivo para sellar hojas continuas de material sintetico termoplastico. Expired - Fee Related ES2088335B1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE9205480U DE9205480U1 (de) 1992-04-22 1992-04-22 Vorrichtung zum Siegeln von Folienbahnen aus thermoplastischem Kunststoff

Publications (3)

Publication Number Publication Date
ES2088335A2 ES2088335A2 (es) 1996-08-01
ES2088335R ES2088335R (es) 1996-12-01
ES2088335B1 true ES2088335B1 (es) 1997-06-16

Family

ID=6878745

Family Applications (1)

Application Number Title Priority Date Filing Date
ES09300843A Expired - Fee Related ES2088335B1 (es) 1992-04-22 1993-04-22 Dispositivo para sellar hojas continuas de material sintetico termoplastico.

Country Status (11)

Country Link
US (1) US5468333A (es)
JP (1) JPH0623878A (es)
BE (1) BE1006317A5 (es)
CA (1) CA2094520A1 (es)
CH (1) CH687813A5 (es)
DE (2) DE9205480U1 (es)
ES (1) ES2088335B1 (es)
FR (1) FR2690377B1 (es)
GB (1) GB2266267B (es)
IT (1) IT231201Y1 (es)
TW (1) TW218855B (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5672235A (en) * 1995-10-05 1997-09-30 Amplas, Inc. Plastic film stripper apparatus and method for heated sealing apparatus
DK172066B1 (da) * 1996-03-25 1997-10-13 Schur Consumer Prod Fremgangsmåde og anlæg til fremstilling af fryseformposer eller tilsvarende poser af sammensvejste plastfolier samt fryseformpose eller tilsvarende pose fremstillet ved fremgangsmåden eller ved brug af anlægget
DK144397A (da) * 1997-12-11 1999-03-22 Unigreen Int As Fryseformpose
JP3801006B2 (ja) 2001-06-11 2006-07-26 ダイキン工業株式会社 冷媒回路
DE10151576B4 (de) * 2001-10-23 2010-04-15 Lemo Maschinenbau Gmbh Vorrichtung zum Schweißen von Kunststoffolien
DE10306628B4 (de) * 2003-02-18 2008-06-19 Josef Bentele Druckstempel-Vorrichtung zum Folienversiegeln
JP4536457B2 (ja) * 2004-08-20 2010-09-01 藤森工業株式会社 包装袋の製造方法及び製造装置
US20060090845A1 (en) * 2004-11-02 2006-05-04 Tateshi Shimowaki Method and system for producing air-packing devices
US20070144668A1 (en) * 2005-12-27 2007-06-28 Kabushiki Kaisha Toshiba Double-side mounting apparatus, and method of manufacturing electrical apparatus
NL2010985C2 (en) * 2013-06-17 2014-12-18 Vmi Holland Bv Apparatus and method for butt joining strip-shaped members.
KR102034993B1 (ko) * 2019-06-13 2019-10-21 남경보 수납용 봉지 제조 장치

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE542359A (es) *
GB697466A (en) * 1950-10-11 1953-09-23 Oppenheimer Casing Co U K Ltd Apparatus for sealing together the edges of thermoplastic sheets
FR1074659A (fr) * 1952-11-26 1954-10-07 Perfectionnements apportés aux moyens pour l'assemblage des matières thermoplastiques en feuille
FR1086334A (fr) * 1953-07-08 1955-02-11 Perfectionnements aux machines à souder les feuilles de polyethylène et analogues
US2767769A (en) * 1953-10-20 1956-10-23 Goodrich Co B F Heat-sealing thermoplastics
GB901758A (en) * 1960-01-26 1962-07-25 Package Machinery Co Heat-sealing unit for packaging machines
CH398061A (de) * 1961-08-31 1965-08-31 Hesser Ag Maschf Vorrichtung zum Verschweissen von thermoplastischen Folien
DE1215350B (de) * 1962-02-12 1966-04-28 Leipzig Veb Druckmasch Werke Vorrichtung zum Herstellen von Beuteln aus in Folien- oder Schlauchform zu verarbeitenden schweissbaren Werkstoffen
DE1246219B (de) * 1962-12-12 1967-08-03 Windmoeller & Hoelscher Waermeimpulsbalken fuer Schweissgeraete zum Verschweissen thermoplastischer Kunststoffe
US3379595A (en) * 1965-01-26 1968-04-23 Mobil Oil Corp Process and apparatus for heat sealing thermoplastic materials
DE1604662A1 (de) * 1966-01-27 1972-01-13 Ornamin Gmbh & Co Kg Verfahren zur Aufschweissung einer thermoplastischen Kunststoffolie auf einen Gegenstand aus Kunststoff und eine Vorrichtung zur Durchfuehrung des Verfahrens
ES345973A2 (es) * 1966-11-08 1968-12-01 Thimonnier & Cie Perfeccionamientos en las maquinas soldadoras de materias plasticas.
US3567550A (en) * 1968-03-11 1971-03-02 Kannegiesser Maschinen Bonding press with supplemental guide means
NL6911175A (es) * 1969-04-23 1971-01-25
US3721602A (en) * 1971-02-02 1973-03-20 Windmoeller & Hoelscher Apparatus for applying heat-sealed seams to at least two-ply composite material of which the confronting plies
US4104101A (en) * 1972-08-11 1978-08-01 Armen Garabedian Process for making a plastic sheet
GB1376195A (en) * 1972-08-23 1974-12-04 Maxwell Plastics Ltd Manufacture of gloves bags or like articles from thermoplastic film
DE2252413C2 (de) * 1972-10-25 1974-08-01 Windmoeller & Hoelscher, 4540 Lengerich Schweiß- und Trennvorrichtung für Kunststoffolien
FR2261121B1 (es) * 1974-02-20 1978-01-06 Fmc Europe
DE2520687A1 (de) * 1975-05-09 1976-11-18 Doboy Verpackungsmasch Gmbh Verfahren und vorrichtung zur teilung einer druckschweissnaht
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DE2845271A1 (de) * 1978-10-18 1980-04-30 Rovema Gmbh Schweissbacke fuer verpackungsmaschinen
DE2915648A1 (de) * 1979-04-18 1980-11-06 Kiefel Hochfrequenz Paul Verfahren zum verschweissen von kunststoffbeschichteten gewebebahnen sowie vorrichtung zur durchfuehrung des verfahrens
US4529472A (en) * 1982-11-10 1985-07-16 Wei K. Hsu Impulse sealing apparatus
EP0235828B1 (en) * 1983-06-15 1989-05-24 Mitsubishi Jukogyo Kabushiki Kaisha Apparatus for filling bags
DE3869338D1 (en) * 1987-09-28 1992-04-23 Windmoeller & Hoelscher Welding together thermoplastic sheets
DE8912803U1 (es) * 1989-10-28 1990-01-11 Stiegler Gmbh Maschinenfabrik, 7062 Rudersberg, De

Also Published As

Publication number Publication date
CH687813A5 (de) 1997-02-28
BE1006317A5 (fr) 1994-07-19
CA2094520A1 (en) 1993-10-23
ES2088335R (es) 1996-12-01
FR2690377A1 (fr) 1993-10-29
DE4311514A1 (de) 1993-10-28
TW218855B (es) 1994-01-11
ITBZ930001V0 (it) 1993-04-21
DE4311514B4 (de) 2008-11-13
FR2690377B1 (fr) 1994-11-04
US5468333A (en) 1995-11-21
GB9308160D0 (en) 1993-06-02
GB2266267B (en) 1996-01-03
IT231201Y1 (it) 1999-08-02
JPH0623878A (ja) 1994-02-01
DE9205480U1 (de) 1993-08-19
GB2266267A (en) 1993-10-27
ITBZ930001U1 (it) 1994-10-21
ES2088335A2 (es) 1996-08-01

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