JPH09142441A - 液体紙容器のトップシール方法 - Google Patents

液体紙容器のトップシール方法

Info

Publication number
JPH09142441A
JPH09142441A JP7326203A JP32620395A JPH09142441A JP H09142441 A JPH09142441 A JP H09142441A JP 7326203 A JP7326203 A JP 7326203A JP 32620395 A JP32620395 A JP 32620395A JP H09142441 A JPH09142441 A JP H09142441A
Authority
JP
Japan
Prior art keywords
pressure
paper container
seal
liquid paper
sealing
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Withdrawn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
JP7326203A
Other languages
English (en)
Inventor
Noboru Yamashita
暢 山下
Kazuki Yamada
一樹 山田
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP7326203A priority Critical patent/JPH09142441A/ja
Publication of JPH09142441A publication Critical patent/JPH09142441A/ja
Withdrawn legal-status Critical Current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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/346—Making joints having variable thicknesses in the joint area, e.g. by using jaws having an adapted configuration
    • 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
    • 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
    • B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • B29C66/43122—Closing the top of gable top containers
    • 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
    • B29C66/7232—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 comprising a non-plastics layer
    • B29C66/72327—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 comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81425—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being stepped, e.g. comprising a shoulder
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • 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
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8324—Joining or pressing tools pivoting around one axis
    • B29C66/83241—Joining or pressing tools pivoting around one axis cooperating pivoting 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/9261—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools
    • B29C66/92651—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the displacement of the joining tools by using stops
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • B65B51/144—Closing paperboard containers
    • 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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • 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
    • B29C66/7232—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 comprising a non-plastics layer
    • B29C66/72321—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 comprising a non-plastics layer consisting of metals or their alloys
    • 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
    • B29C66/7232—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 comprising a non-plastics layer
    • B29C66/72324—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 comprising a non-plastics layer consisting of inorganic materials not provided for in B29C66/72321 - B29C66/72322
    • B29C66/72325—Ceramics
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8225—Crank mechanisms
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • B29L2031/7162—Boxes, cartons, cases
    • B29L2031/7166—Cartons of the fruit juice or milk type, i.e. containers of polygonal cross sections formed by folding blanks into a tubular body with end-closing or contents-supporting elements, e.g. gable type containers
    • 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
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • 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
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
    • B31B2100/0022—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed made from tubular webs or blanks, including by tube or bottom forming operations
    • 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
    • B31B2110/00—Shape of rigid or semi-rigid containers
    • B31B2110/30—Shape of rigid or semi-rigid containers having a polygonal cross section
    • B31B2110/35—Shape of rigid or semi-rigid containers having a polygonal cross section rectangular, e.g. square
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding
    • B31B50/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure, e.g. by welding using sealing jaws or sealing dies
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts

Abstract

(57)【要約】 【課題】液体紙容器のトップシールの加圧が常に安定し
て、調整時間を短縮できる液体紙容器のトップシール方
法を提供する。 【解決手段】一対の加圧ブロック１４面のシールジョウ
１５以外の部分にストッパー１６を設け、合掌シールさ
れるリブの両側から円弧運動あるいは直線運動で接近す
る前記加圧ブロック１４を前記ストッパー１６で停止さ
せ、対向する前記シールジョウ１５間に常に所定のクリ
アランスが保たれることを特徴とする液体紙容器のトッ
プシール方法。

Description

【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は角柱状の筒状体のト
ップを合掌シールして成形する液体紙容器のトップシー
ル法に関する。
【０００２】
【従来の技術】胴部が角柱であり、頭部が切り妻形屋根
状のゲーベルトップカートン及び頭部が平坦なフラット
トップカートンは、液体紙容器の代表的なものであり、
牛乳、果汁飲料、酒、洗剤、モーターオイル等に極めて
広く使用されている。その成形方法は、板紙を主要基材
とする積層材を筒状体に成形しておき、底部を成形し、
頭部から中身を充填して、頭部を折り畳み、最上部に連
接されているリブをヒートシールして密封されている。
このヒートシールは頭部を一旦くせ折りした後、対向す
るリブ内面を熱風でシール温度に加熱しておき、重合す
る複数枚のリブを左右から水平にシールジョウで挟んで
加圧し密封している。このトップシール部では胴貼り部
も含まれるので、ゲーベルトップカートンの場合で４〜
６層、フラットトップカートンでは２〜４層の基材が重
合し、トップシール部の厚みは必ずしも均一ではない。
図１はゲーベルトップカートン１０の斜視図であり、胴
部１に連接された折込み屋根パネル２、屋根パネル３の
上部に設けられたリブが重合されてトップシール部４を
形成している。そのトップシール部４は胴貼り部を除け
ば４層の基材が重合されて合掌シールされている。図２
は従来の液体紙容器のトップシール法の模式的な説明図
であ。図２に示すように、加圧ブロック１４の内側に対
向するように形成されているシールジョウ１５が複数枚
のリブが重合されるトップシール部４を左右から挟んで
加圧する。この加圧機構は一般に図３に示すように油圧
あるいは空圧によって駆動ロッド１１を押し下げること
により、リンク１２、揺動レバー１３を介してその先端
に取り付けられた加圧ブロック１４とさらにその先端に
形成されているシールジョウ１５を図２における矢印方
向に円弧上で移動させ、中間に置かれたトップシール部
４を左右から水平に加圧するようになっている。
【０００３】
【発明が解決しようとする課題】従来の液体紙容器のト
ップシール法は図２に模式的に示すように、シールジョ
ウ１５と加圧ブロック１４同志は接触することなく適性
な圧力でトップシール部４を左右から押しつけている。
従って加圧が強すぎると基材表面の熱可塑性樹脂層ばか
りでなく中間層まで破壊されいわゆる根切れを起こし、
逆に加圧が不足するとヒートシールによる密封不良を起
こし、液漏れの原因となっていた。以上のような加圧方
法ではなんらかの理由で加圧力が変わると、シールジョ
ウ１５同志の間隔が変わることとなり、それがヒートシ
ール結果に影響し、トップシール部４の品質にバラツキ
を生じさせるという問題がある。また、新規作業に入る
場合のトップシール部４に対する最適加圧条件を決定す
るいわゆる初期値設定までに何回か微調整を繰り返す必
要があり、立ち上がりまでの時間がかかり過ぎるという
問題がある。またシールジョウ１３の交換時にその取り
付け位置精度が出ていないとヒートシール結果に悪影響
を及ぼすので加圧ブロック１４の及びその取り付け精度
をチェックする時間がかかるという問題もある。本発明
は、前述の問題点に鑑みてなされたもので、液体紙容器
のトップシール部４の合掌シールを安定して行い、また
別の作業に切り替わる場合の初期値設定時間（メイクレ
ディータイム）の短縮を図ることのできる方法の提供を
目的とする。
【０００４】
【課題を解決するための手段】前記課題を解決するため
になされた本発明は、板紙を基材とする積層体からなる
４角柱状の胴部の上端に連接された対向する折込み屋根
パネル及び対向する屋根パネルをくせ折りし、前記折込
み屋根パネルおよび前記屋根パネルの上端にそれぞれ連
接されたリブ内面をシール温度に加熱し、対向するリブ
同志を加圧ブロック面に形成されたシールジョウで水平
に左右から挟み込んで加圧して合掌シールする方法にお
いて、前記加圧ブロック面のシールジョウ以外の部分に
ストッパーを設け、合掌シールされるリブの両側から円
弧運動あるいは直線運動で接近する加圧ブロックを前記
ストッパーで停止させ、対向する前記シールジョウ間に
常に所定のクリアランスが保たれることを特徴とする液
体紙容器のトップシール方法を要旨とする。また、前記
ストッパーを対向する加圧ブロックの両面に対称的に、
あるいは非対称的に設けることができる。
【０００５】
【発明の実施の形態】以下，本発明を図面を用いてさら
に詳しく説明する。図４は本発明による液体紙容器のト
ップシール方法の説明図である。図４に示すように、本
発明によ液体紙容器のトップシール方法に使用する一対
の加圧ブロック１４には、その対向面のシールジョウ１
５以外の部分に両加圧ブロック１４が接触して、それ以
上接近出来ないようにするストッパー１６が設けられて
いる。このストッパー１６の形成は、図４（ａ）のよう
に対称的であっても、あるいは図４（ｂ）に示すように
非対称的に設けてもよい。合掌シール時の加圧を安定し
て一定のレベルを保持することは、トップシール部４に
おける基材の厚みと圧縮率、加圧面積、加熱温度等が変
わらなければ、シールジョウ１５が常に一定の間隔とな
るまで押し込まれることにほかならない。本発明による
液体紙容器のトップシール方法の発明者はこの点に着目
し、両加圧ブロック１４のストッパー１６による停止位
置で両シールジョウ１５間に形成されるクリアランスを
常に一定の最的値に制御できるようにした。すでに最適
なクリアランスの値は基材の層構成、総厚、圧縮率、加
圧面積等を固定することによって経験的に求められてい
る。例えば後述する実施例の基材の場合では、総厚０．
６ｍｍの基材に対して、０．５ｍｍのクリアランスを設
けることによって最適なトップシールを行うことができ
る。なお、図４では基材１枚の総厚みに対応するクリア
ランスをｄで示している。
【０００６】従って最適クリアランスを有するように作
製された加圧ブロック１４を用いて、図４で示すような
位置関係でトップシール部４を加圧すれば、最適クリア
ランスが各ショット毎に再現できるので極めて安定した
トップシールを行うことが可能になる。なお、図４にお
いてトップシール部４の先端の２層部分のクリアランス
は２ｄで示されている。また、４層部分は略この倍の値
となる。トップシール部４には前述のように胴貼り部を
直角方向にヒートシールする必要があり５層、あるいは
ブランクの端面処理を行う場合は６層からなる部分が生
じ、この部分は特に加圧を必要とするので「ビス」と称
する部分的な凸状部をシールジョウ１５面に形成し、余
分に加圧されるようになっている。いずれにしても、本
発明によれば総合的加圧がシールジョウ１５間のクリア
ランスを一定に保つことによって常に安定して行うこと
ができる。加圧ブロック１４は一般にステンレスＳＵＳ
３０４によって製作されており、一般のヒートシールジ
ョウと異なり加熱機能は不要で、むしろ冷却機能を持た
せる必要があり、加圧ブロック１４内に冷却水パイプを
配管するケースもある。
【０００７】本発明によ液体紙容器のトップシール方法
が対象とする液体紙容器の基材は、板紙を中心とし、例
えば次のように外側から順に積層されている。 １） ＰＥ／板紙／ＰＥ ２） ＰＥ／板紙／ＰＥ／ＡＬ／ＰＥ ３） ＰＥ／板紙／ＰＥ／ＶＭ−ＰＥＴ／ＰＥ ４） ＰＥ／板紙／接着材／ＡＬ／接着材／ＰＥＴ／Ｐ
Ｅ ここで ＰＥ 低密度ポリエチレン ＡＬ アルミニウム箔 ＰＥＴ ポリエチレンテレフタレートフィルム ＶＭ−ＰＥＴ アルミあるいは酸化珪素蒸着を施した
ポリエチレンテレフタレートフィルム ＰＥは低密度ポリエチレンに代わって、線状低密度ポリ
エチレン、中密度ポリエチレン、ポリプロピレン、アイ
オノマー、エチレン・酢酸ビニル共重合体、エチレン・
アクリル酸共重合体、エチレン・アクリル酸エステル、
エチレン・ビニルアルコール共重合体等の中から適宜選
択することができる。
【０００８】
【実施例】本発明による液体紙容器のトップシール方法
を次の仕様の液体紙容器に対して次の加圧条件で適用し
た。 カートン形態 ：ゲーベルトップカートン 胴部断面寸法 ：８５×８５ｍｍ 積層構成 ：ＰＥ２５／板紙４００／ＥＭＡＡ２５／ＡＬ７ ／／ＰＥＴ１２／ＰＥ６０ 基材の総厚み ：０．６ｍｍ クリアランス（ｄ）：０．５ｍｍ 最小圧力 ： ｔｏｎ／ｃｍ2 加圧時間 ： ｓｅｃ． 加熱時間 ： ℃のホットエアーで ｓｅｃ． こでＥＭＡＡは、エチルメタアクリル酸コポリマーを、
／／はドライラミ用接着材を示す。また、ストッパーを
設けない従来の加圧ブロックを用いて同一仕様の液体紙
容器のトップシールを行って得られた液体紙容器を比較
例として参照した。以上の結果、比較例の場合はトップ
シール部４の加圧に明らかに最適範囲を越え、液漏れ等
のトラブルを引き起こす強弱のバラツキが見られたが、
実施例では終始安定しバラツキは見られなかった。ま
た、トップシールが定常状態に入るまでの調整時間を減
らすことができ、より効率のよい成形充填作業が可能と
なった。
【０００９】
【発明の効果】本発明による液体紙容器のトップシール
方法によれば、加圧ブロックのシールジョウ以外の部分
にストッパーを設けることにより、トップシール部にか
かる各ショト毎の圧力のバラツキを少なくするばかり
か、作業開始時の加圧調整時間を短縮することができ、
液体紙容器の品質の安定、成形充填作業の効率向上に効
果を発揮する。
【図面の簡単な説明】
【図１】ゲーベルトップカートンの斜視図
【図２】従来の液体紙容器のトップシール方法の説明図
【図３】加圧機構説明図
【図４】本発明による液体紙容器のトップシール方法の
説明図
【符号の説明】 １ 胴部 ２ 折込み屋根パネル ３ 屋根パネル ４ トップシール部 １０ 液体紙容器（ゲーベルトップカートン） １１ 駆動ロッド １２ リンク １３ 揺動レバー １４ 加圧ブロック １５ シールジョウ １６ ストッパー ２０ 加圧機構 ｄ 基材の総厚に対応するクリアランス

Claims (3)

    【特許請求の範囲】
  1. 【請求項１】 板紙を基材とする積層体からなる４角柱
    状の胴部の上端に連接された対向する折込み屋根パネル
    及び対向する屋根パネルをくせ折りし、前記折込み屋根
    パネルおよび前記屋根パネルの上端にそれぞれ連接され
    たリブ内面をシール温度に加熱し、対向するリブ同志を
    加圧ブロック面に形成されたシールジョウで水平に左右
    から挟み込んで加圧して合掌シールする方法において、
    前記加圧ブロック面のシールジョウ以外の部分にストッ
    パーを設け、合掌シールされるリブの両側から円弧運動
    あるいは直線運動で接近する加圧ブロックを前記ストッ
    パーで停止させ、対向する前記シールジョウ間に常に所
    定のクリアランスが保たれることを特徴とする液体紙容
    器のトップシール方法。
  2. 【請求項２】 前記ストッパーが対向する加圧ブロック
    の両面に対称的に設けられることを特徴とする請求項１
    記載の液体紙容器のトップシール方法。
  3. 【請求項３】 前記ストッパーが対向する加圧ブロック
    の両面に対して非対称に設けられることを特徴とする請
    求項１記載の液体紙容器のトップシール方法。
JP7326203A 1995-11-22 1995-11-22 液体紙容器のトップシール方法 Withdrawn JPH09142441A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7326203A JPH09142441A (ja) 1995-11-22 1995-11-22 液体紙容器のトップシール方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
JPH09142441A true JPH09142441A (ja) 1997-06-03

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ID=18185164

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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009528186A (ja) * 2006-02-28 2009-08-06 テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム 流動食品の密封パッケージを製造する折曲げユニット
ITTV20100161A1 (it) * 2010-12-07 2012-06-08 Galdino Candiotto Sistema di pressa saldante azionata a ginocchiera con potenza regolabile indipendentemente su ogni coppia di bracci.
JP2020142839A (ja) * 2019-03-07 2020-09-10 日本製紙株式会社 紙容器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009528186A (ja) * 2006-02-28 2009-08-06 テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム 流動食品の密封パッケージを製造する折曲げユニット
ITTV20100161A1 (it) * 2010-12-07 2012-06-08 Galdino Candiotto Sistema di pressa saldante azionata a ginocchiera con potenza regolabile indipendentemente su ogni coppia di bracci.
JP2020142839A (ja) * 2019-03-07 2020-09-10 日本製紙株式会社 紙容器

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