KR880004920A - 프로필 및 인접한 립-형 지퍼를 운반용 필름 웨브에 형성시키고 적용하는 장치 및 방법 - Google Patents

프로필 및 인접한 립-형 지퍼를 운반용 필름 웨브에 형성시키고 적용하는 장치 및 방법 Download PDF

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KR880004920A
KR880004920A KR870011633A KR870011633A KR880004920A KR 880004920 A KR880004920 A KR 880004920A KR 870011633 A KR870011633 A KR 870011633A KR 870011633 A KR870011633 A KR 870011633A KR 880004920 A KR880004920 A KR 880004920A
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lip
profile
lip member
die
die slot
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KR870011633A
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레리지크
트롬블리 제임스
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리챠드 지.워터맨
더 다우 케미칼 캄파니
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Publication of KR880004920A publication Critical patent/KR880004920A/ko

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • 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
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • B29C65/028—Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one 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
    • B29C66/40—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
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • 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
    • B29L2005/00—Elements of slide fasteners
    • 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
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements
    • B31B70/8132—Applying the closure elements in the machine direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Advancing Webs (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

내용 없음

Description

프로필 및 인접한 립-형 지퍼를 운반용 필름 웨브에 형성시키고 적용하는 장치 및 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 장치를 나타내는 투시도 이다.
제2도는 본 발명의 형성 및 결합 상태의 측면도이다.
제3도는 제2도의 선 3-3을 따라 자른 확대시킨 단면도이다.

Claims (14)

  1. 프로파일 부재, 첫번째 립 부재, 및 두번째 립 부재를 3개의 분리된 압출물로서 압출시키고, 상기 프로파일 부재, 첫번째 립 부재, 및 두번째 립 부재를, 상기 프로파일 부재가 상기 첫번째 및 두번째 립 부재 사이에 위치하도록 일렬로 배열되게 상기 필름 웨브에 결합시키는 단계를 포함하여 인접한 립을 갖는 프로파일을 운반용 필름 웨브에 적용시키는 방법.
  2. 제1항에 있어서, 거의 평면 기본 부재를 압출시키고, 상기 프로파일과 립 부재를 상기 기본 부재에 결합시키기 전 상기 기본 부재를 상기 필름 웨브에 결합시키는 단계를 포함하는 방법.
  3. 제2항에 있어서, 상기 기본 부재를 롤러를 사용하여 상기 필름 웨브와 맞물리게 프레스하고, 상기 기본 부재를 상기 필름 웨브에 결합시킨 후 또한 상기 기본 부재를 주변 온도까지 냉각시키기 전, 상기 프로마일 부재, 첫번째 립 부재 및 두번째 립 부재를 상기 기본 부재에 결합시키는 단계를 포함하는 방법.
  4. 제1항, 제2항 또는 제3항에 있어서, 상기 프로마일 부재, 첫번째 립 부재 및 두번째 립 부재를, 상기 프로마일 부재가 압출되는 프로마일 다이 슬롯, 상기 첫번째 립 부재가 압출되는 첫번째 립 부재 다이 슬롯, 및 상기 두번째 립 부재가 압출되는 두번째 립 부재 다이 슬롯을 갖는 압출용 다이를 통해 압출시키는 방법.
  5. 제1항 내지 제4항중 어느 하나에 있어서, 단면이 화살 모양 상부, 축 부분 및 활 모양 기본 부분을 갖는 상기 프로파일 부재를 압출시키고, 단면이 거의 삼각형 또는 원형을 갖는, 상기 첫번째 및 두번째 립 부재를 압출시키는 단계를 포함하며, 상기 첫번째 및 두번째 립 부재가 상기 필름 웨브에 각각 3.4 내지 4.6 mm의 간격으로 배열되는 방법.
  6. 프로파일 부재가 압출되는 프로파일 다이 슬롯을 갖는 압출 다이, 첫번째 립 부재가 압출되는 첫번째 립 부재 다이슬롯, 및 두번째 립 부재가 압출되는 두번째 립 부재 다이 슬롯을 구비하며, 이때 상기 프로파일 다이 슬롯, 및 상기 첫번째 및 두번째 립 부재다이 슬롯은 상기 프로파일 부재, 및 상기 첫번째 및 두번째 립 부재를 3개의 분리된 추출물로서 압출시키도록 위치하며, 상기 프로파일 부재가 상기 첫번째 및 두번째 립 부재 사이에 위치하도록 일렬로 배열되게 상기 프로파일 부재, 및 상기 첫번째 및 두번째 립 부재를 상기 필름 웨브에 전달하는 것으로 구성된, 프로파일 부재, 첫번째 립 부재 및 두번째 립 부재를 합성수지 물질로된 필름 웨브상에 압출시키는 압출장치.
  7. 제6항에 있어서, 상기 프로파일 다이 슬롯 및 상기 첫번째 및 두번째 립 부재 다이 슬롯이 서로 수직으로 상쇄하는 압출장치.
  8. 제7항에 있어서, 상기 프로파일이 다이 슬롯이 상기 다이 슬롯을 이분하는 거의 수직 축을 갖고, 상기첫번째 립 부재 다이 슬롯은 상기 축의 한쪽 측면에 위치되고 상기 두번째 립 부재 다이 슬롯은 상기 축의다른 측면에 위치되는 압출장치.
  9. 제7항에 있어서, 상기 프로파일 다이 슬롯이 상부를 포함하고, 하나 이상의 상기 첫번째 및 두번째 립 부재 다이 슬롯은, 상기 하나 이상의 립 부재 다이 슬롯이 상기 상부로 부터 측면 상쇄하는 거리보다 더 큰 거리로 상기 상부로부터 수직으로 상쇄하는 압출장치.
  10. 제7항, 제8항 또는 제9항에 있어서, 첫번째 및 두번째 립 부재 다이 슬롯이 서로 3.4 내지 4.6mm의 간격으로 측면 상쇄하는 압출장치.
  11. 제6항 내지 제10항중 어느 하나에 있어서, 상기 첫번째 및 두번째 립 부재 다이 슬롯이 각각 거의 삼각형 또는 원형 단면을 갖는 압출장치.
  12. 기본 부재를 압출시키기 위한 첫번째 압출장치 상기 필름 웨브에 대해 상기 기본 부재를 프레스하기 위한 장치 및 상기 프로파일 부재, 첫번째 립 부재 및 두번째 립 부재를, 상기 프로파일 부재가 상기 첫번째 및 두번째 립 부재 사이에 위치하도록 일렬로 배열되게 상기 필름 웨브에 결합시키기 위해 조립된, 프로파일 부재, 첫번째 립 부재 및 두번째 부재를 3개의 분리된 압출물로서 압출시키기 위한 두번째 압출 장치를 포함하는, 인접한 립을 갖는 프로파일을 합성수지 물질로 된 운반용 필름 웨브에 적용시키는 장치.
  13. 제12항에 있어서, 상기 두번째 압출장치가, 상기 프로파일 부재가 압출되는 프로파일 다이 슬롯, 상기 첫번째 립 부재가 압출되는 첫번째 립 부재 다이 슬롯, 및 상기 두번째 립 부재가 압출되는 두번째 립부재 다이 슬롯을 구비하고, 상기 프로파일 다이 슬롯이 하나 이상의 상기 첫번째 및 두번째 립 부재 다이 슬롯으로부터 수직으로 상쇄하는 압출 다이를 포함하는 장치.
  14. 제13항에 있어서, 상기 프로파일 다이 슬롯이 첫번째 립 부재 다이 슬롯 및 상기 두번째 립 부재 다이 슬롯으로부터 각각 수직으로 상쇄하는 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR870011633A 1986-10-20 1987-10-20 프로필 및 인접한 립-형 지퍼를 운반용 필름 웨브에 형성시키고 적용하는 장치 및 방법 KR880004920A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/921,023 US4741789A (en) 1986-10-20 1986-10-20 Apparatus and process for forming and applying a profile and adjacent rib-type zipper to a traveling film web
US921023 1992-07-27

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AU7989187A (en) 1988-04-21
HK94393A (en) 1993-09-17
US4741789A (en) 1988-05-03
EP0265019A3 (en) 1989-10-18
JPH0515374B2 (ko) 1993-03-01
EP0265019A2 (en) 1988-04-27
DE3783707T2 (de) 1993-05-13
AR247353A1 (es) 1994-12-29
BR8705641A (pt) 1988-05-31
DE3783707D1 (de) 1993-03-04
JPH01133723A (ja) 1989-05-25
MX161802A (es) 1990-12-28
NZ222151A (en) 1990-04-26
AU589812B2 (en) 1989-10-19
EP0265019B1 (en) 1993-01-20
CA1287718C (en) 1991-08-20

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