US3762282A - Method and device for manufacturing bags from thin-walled tubular foil in a continuous process - Google Patents

Method and device for manufacturing bags from thin-walled tubular foil in a continuous process Download PDF

Info

Publication number
US3762282A
US3762282A US00228156A US3762282DA US3762282A US 3762282 A US3762282 A US 3762282A US 00228156 A US00228156 A US 00228156A US 3762282D A US3762282D A US 3762282DA US 3762282 A US3762282 A US 3762282A
Authority
US
United States
Prior art keywords
foil
sealing means
supporting surface
pair
cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00228156A
Other languages
English (en)
Inventor
Der Meulen L Van
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.)
MEULEN LVD
Original Assignee
MEULEN LVD
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 MEULEN LVD filed Critical MEULEN LVD
Application granted granted Critical
Publication of US3762282A publication Critical patent/US3762282A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • B31B70/005—Making flexible containers, e.g. envelopes or bags involving a particular layout of the machinery or relative arrangement of its subunits
    • 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
    • B31B2155/00—Flexible containers made from 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/022—Holders for feeding or positioning sheets or webs
    • B31B70/024—Rotating holders, e.g. star wheels, drums

Definitions

  • ABSTRACT A method and device for manufacturing bags for household refuse, starting from thin-walled synthetic tubular material, in which said material is tensioned upon the periphery of a drum, one or more combined cutting and sealing members being accommodated along said dt mipeipher 5 Claims, 2 Drawing Figures METHOD AND DEVICE FOR MANUFACTURING BAGS FROM THIN-WALLED TUBULAR FOIL IN A CONTINUOUS PROCESS BACKGROUND OF THE INVENTION
  • My invention relates to a method for manufacturing in a continuous process, bags with a sealed bottom from thermoplastic tubular foil, the method comprising the steps of sealing and cutting through the tubular foil at regular intervals, in a direction transverse to its longitudinal sense and on the entire width of' the tube.
  • the tangential velocity of the drum is greater than the rate at which the tubular foil is fed forward, the tubular foil being pressed on the outer circumference of the drum.
  • the thin-walled foil is pulled taught and as a consequence a better control of the consecutive operations is obtained.
  • My invention relates further to a device for manufacturing in a continuous process bags from thin-walled tubular foil, comprising a feeder for the foil, a surface supporting the foil and travelling therewith, at least one cutting member, and a sealing member, situated transverse to the direction of advance of the foil, the supportingsurface being constituted by the outer circumference of a drum and each cutting member being combined with a sealing member which is countersunk in the casing. of the drum.
  • the circumference of the drum should be greater than the length of the bag to be manufactured and this curcumference should therefore be tuned to the size of the largest bag to be manufactured.
  • FIG. 2 is a view of a detail from FIG. 1.
  • a frame 1 is provided in which a drum 2 and a first set of rollers 3 and 4' are mounted for rotation.
  • the drive of the drum and of the rollers is effected in the direction of the arrows 5, 6 and 7.
  • a feeder 8' for the uninterrupted supply of the tubular foil 9 is provided in the frame 1 and also a rotating cutting member 10 and some presser belts 11.
  • two conveyor belts 12 and 13' are provided serving for the discharge of the transversely folded bags.
  • Two folding blades (so-called knives) 14 are diametrically arranged in the drum 2. Furthermore two sealing members 15 are diametrically arranged in a countersunk position with respect to the outer circumference of the drum 2. These members comprise each two sealing jaws 16 which can open and close as will be further described with reference to FIG. 2. Near each sealing member 15 a resilient anvil 17 is provided which can co-operate with the cutting member 10.
  • the roller 3 is provided with a clamping slit 18 and a knife 19.
  • the roller 4 has a clamping slit 20.
  • a pusher member 21 consisting of some fingers 22 which can move from between the belts 11 for pressing the severed piece of tubular foil toward the countersunk sealing member 15.
  • the drum 2 and the rollers 3 and 4 and the cutting member 10 are synchronized in such a way that the following conditions are satisfied:
  • the feeder 8 moves forward the tubular foil 9 at a rate which is smaller than the tangential velocity of the drum 2.
  • the presser belts 11 move at the same rate as the circumference'of the drum.
  • the cutting member It) performs two rotations against one rotation of the drum. Asa consequence two bags are made per revolution of the drum 2, the length of each bag being slightly smaller than half the circumference of the drum 2.
  • the rollers 3 and 4 rotate synchronously with the drum 2 in such a way that the clamping slit 18 cooperates consecutively with the two knives 14 of the drum 2, while per revolution the clamping slit 20 cooperates once with the knife 19.
  • the method progressesas follows:
  • the tubular foil 9 is tangentially fed to the drum 2 and seized between the outer circumference of the drum and the belts 11 which both preferably move faster than the feeder 8.
  • the thin-walled and very slack foil is pulledtaught because the feeder 8 determines the velocity of the foil.
  • the tubular foil is clamped thereinbetween and cut through over its full width so that a rectangular tubular length is severed from the advancingendless tubular foil.
  • the trailing free end of this tubular foil length sinks into the drum, the pusher fingers 22 assisting the foil length so sink.
  • the sealing jaws 16 close whereby the transverse seal is formed and a bag is obtained which on one side is open.
  • the folding knife 14 makes a first transverse fold approximately halfway the length of this bag at the moment that this knife starts co-operating with the clamping slit 18 of the roller 3.
  • the fold made in this way engages the clamping slit 18. Since the drum 2 and the roller 3-continue to rotate in the direction of d the arrows 5 and 6, the bag, which for its lower half was already freely hanging, is pulled from the drum 2 and the clamping belt 11. In the depicted position this bag has already further advanced and the folding knife 19 of the roller 3 is already on the verge of starting its cooperation withthe now doubledbag.
  • the folding knife 19 puts the bag-into the clamping-slit 20, whereupon the bag provided now with two folds is conveyed further and delivered to the conveyor belts l2 and 13 which ensure that the bag is conveyed toward the left in FIG. 1. It should be noted that for each bag the fold which has just been made is at first offered to a next member providing for the further passage.
  • the two clamping jaws 16 are coupled to each other via gea r wheels 23, 24, with such a ratio of diameter that the outer clamping jaw described a greater arc than the inner one.
  • An electric resistance wire (not depicted) is provided on both clamping jaws, current being supplied to the wires when the jaws are closed. In this way a two-sided welded joint of sufficient strength is obtained.
  • sealing-cutting combinations 10, -17 may be provided along the circumference of the drum 2 . This depends on the size of the bag to be manufactured. On changing the size of the bag, one or two of these combinations can be made inoperative e.g., by retracting slightly the anvil 17 toward the center of the drum 2. The position of the folding knives 14 can be adjusted by turning the connecting arm 25.
  • the bags of thin tubular foil are handled with difficulty, they are preferably folded one or more times in a direction perpendicular to the transverse folds described hereinbefore.
  • the conveyor belts l2 and 13 are provided, which transfer the bag, which has been folded twice in a transverse direction, to a conveyor belt 26 which passes the bag between three drums 27, 28 and 29.
  • These drums are rotatably supported in a frame 30 and are likewise provided with a folding knife and a clamping slit (not depicted).
  • the effect of this part of the device is in conformity with the usual progress of operations with folding rollers (see Netherlands Patent Application No. 7,009,150).
  • the described embodiment relates to a machine for manufacturing folded bags.
  • the invention is, however, not limited thereto, since the essence of the invention is in the first part of the method which relates to the cutting-through and the sealing of the bags on the drum.
  • the bags manufactured in this manner may be directly discharged from the drum and transferred to a separate device for piling or folding.
  • the invention allows for the manufacture at a fast rate of thin-walled plastic bags, which bags one by one are very difficult to handle;
  • a method for the continuous manufacture of bags having a sealed bottom from continuously advanced thin-walled thermo-plastic tubular foil comprising the steps of moving a supporting surface at a speed which is at least equal to the advancing velocity of the foil, feeding the tubular foil in the direction of movement of said surface so as to bring the foil into firm contact with said surface, cutting through the tubular foil at regular intervals in a direction transverse to its longitudinal direction of movement and across the entire width of the tube, pushing the trailing end of each cut-off length of the foil towards a pair of cooperative sealing means supported by and lying below said moving surface, and closing said sealing means so as to form a seal in said trailing end.
  • a method according to claim 1, comprising cutting said tubular foil with a revolving knife periodically cooperating with the moving supporting surface.
  • a device for manufacturing bags in a continuous process from thin-walled tubular foil comprising a feeder for the foil, a surface supporting the foil and travelling therewith at a speed at least equal to the feeding speed of the foil, at least one movable cutting means being provided outside said surface, a resilient anvil on the travelling supporting surface adapted to cooperate with said cutting means, and at least one pair of sealing means extending transverse to the direction of travel of the supporting surface, and ahead of said anvil, each pair of said sealing means being countersunk in the travelling supporting surface, and a pusher being positioned near the cutting means adapted to urge the trailing end of the cut-off foil towards a pair of said sealing means.
  • each pair of sealing means consists of two swingable clamping jaws adapted to be moved into openable and closed positions.
  • a device comprising a plurality of pressing belts being provided along a part of the path of the travelling supporting surface, said pusher consisting of fingers being movable between the pressing belts.

Landscapes

  • Making Paper Articles (AREA)
US00228156A 1971-02-23 1972-02-22 Method and device for manufacturing bags from thin-walled tubular foil in a continuous process Expired - Lifetime US3762282A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7102415.A NL163462C (nl) 1971-02-23 1971-02-23 Inrichting voor het uit dunwandige thermoplastische buisfolie vervaardigen van zakken met gelaste bodem.

Publications (1)

Publication Number Publication Date
US3762282A true US3762282A (en) 1973-10-02

Family

ID=19812548

Family Applications (1)

Application Number Title Priority Date Filing Date
US00228156A Expired - Lifetime US3762282A (en) 1971-02-23 1972-02-22 Method and device for manufacturing bags from thin-walled tubular foil in a continuous process

Country Status (10)

Country Link
US (1) US3762282A (fr)
JP (1) JPS5229233B1 (fr)
BE (1) BE779120A (fr)
DE (1) DE2207043C3 (fr)
DK (1) DK129402B (fr)
FR (1) FR2127681A5 (fr)
GB (1) GB1359443A (fr)
IT (1) IT947815B (fr)
NL (1) NL163462C (fr)
SE (1) SE376384B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893884A (en) * 1972-04-26 1975-07-08 Holweg Const Mec Bag-making machine
US4114520A (en) * 1976-04-14 1978-09-19 Windmoller & Holscher Apparatus for making bags from a continuously fed thermoplastic tubular web of film
US4256028A (en) * 1979-09-07 1981-03-17 Owens-Illinois, Inc. Method and apparatus for making plastic preforms for packaging containers
US5588944A (en) * 1993-08-02 1996-12-31 Windmoller & Holscher Apparatus for welding the tubular sections of sacks, bags or the like

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2402545C2 (de) * 1974-01-19 1984-11-08 Leonard van der Ariana Meulen Verfahren und Vorrichtung zum kontinuierlichen Herstellen von Beuteln o.dgl. aus thermoplastischer Kunststoffolie
DE2660899C2 (de) * 1976-04-14 1985-10-10 Windmöller & Hölscher, 4540 Lengerich Vorrichtung zum Herstellen von Beuteln aus einer kontinuierlich zugeführten thermopolastischen Schlauchfolienbahn
DE2703462C2 (de) * 1977-01-28 1983-04-28 Hans 5216 Niederkassel Lehmacher Vorrichtung zur Herstellung seitengeschweißter Flachbeutel
GB9121420D0 (en) * 1991-10-09 1991-11-20 Ag Patents Ltd Manufacturing infusion packages
CN104369425B (zh) * 2014-11-12 2016-09-21 浙江华岳包装机械有限公司 贴窗机薄膜切断装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229121A (en) * 1938-04-27 1941-01-21 Edwin J Mcilvried Method and apparatus for operating on sheet material
US2737859A (en) * 1952-02-28 1956-03-13 Gen Mills Inc Bag making machine
US2775171A (en) * 1951-06-11 1956-12-25 Interstate Bag Company Method and machine for bag making
US3156164A (en) * 1959-12-21 1964-11-10 Holweg Const Mec Machine for forming a fluid-tight bag of thermo-weldable material
US3509799A (en) * 1967-08-04 1970-05-05 Crown Zellerbach Corp Bag-forming method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2229121A (en) * 1938-04-27 1941-01-21 Edwin J Mcilvried Method and apparatus for operating on sheet material
US2775171A (en) * 1951-06-11 1956-12-25 Interstate Bag Company Method and machine for bag making
US2737859A (en) * 1952-02-28 1956-03-13 Gen Mills Inc Bag making machine
US3156164A (en) * 1959-12-21 1964-11-10 Holweg Const Mec Machine for forming a fluid-tight bag of thermo-weldable material
US3509799A (en) * 1967-08-04 1970-05-05 Crown Zellerbach Corp Bag-forming method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893884A (en) * 1972-04-26 1975-07-08 Holweg Const Mec Bag-making machine
US4114520A (en) * 1976-04-14 1978-09-19 Windmoller & Holscher Apparatus for making bags from a continuously fed thermoplastic tubular web of film
US4256028A (en) * 1979-09-07 1981-03-17 Owens-Illinois, Inc. Method and apparatus for making plastic preforms for packaging containers
US5588944A (en) * 1993-08-02 1996-12-31 Windmoller & Holscher Apparatus for welding the tubular sections of sacks, bags or the like

Also Published As

Publication number Publication date
DK129402B (da) 1974-10-07
NL7102415A (fr) 1972-08-25
SE376384B (fr) 1975-05-26
GB1359443A (en) 1974-07-10
DK129402C (fr) 1975-02-24
NL163462C (nl) 1980-09-15
IT947815B (it) 1973-05-30
DE2207043A1 (de) 1972-09-07
BE779120A (fr) 1972-08-09
FR2127681A5 (fr) 1972-10-13
JPS5229233B1 (fr) 1977-08-01
DE2207043C3 (de) 1981-07-02
DE2207043B2 (de) 1977-07-07
NL163462B (nl) 1980-04-15

Similar Documents

Publication Publication Date Title
US4106265A (en) Wrapping machine and method with four side rotary tucker
US3783585A (en) Machine for closing filled bags
EP0453522B1 (fr) Machine de formage, remplissage, fermeture hermetique et emballage separe pour conteneurs refermables
US4663917A (en) Packaging apparatus
US3257915A (en) Bag forming machine
US4102111A (en) Wrapping machine
US4534158A (en) Packaging machine
US2780275A (en) Device for seaming thermoplastic bags
US5775063A (en) Process and apparatus for assembly-packaging pellet-like articles
GB2146575A (en) The manufacture of thermoplastic bags
US3762282A (en) Method and device for manufacturing bags from thin-walled tubular foil in a continuous process
GB1203868A (en) Method and machine for forming and filling bags
AU2007295053B2 (en) Bag machine and winder
US3344576A (en) Method and apparatus for packaging
US3028294A (en) Heat sealing and cutting apparatus
US3952480A (en) Packaging apparatus
US3675542A (en) Method of manufacturing bags
US4011708A (en) Bag handling apparatus
US3818675A (en) High speed wrapping machine
US4745727A (en) Device serving to fashion carrying handles for attachment to sheet wrapping material, and a handle obtained with such a device
US4344270A (en) Method and apparatus for packaging commodities
US3379101A (en) Method and apparatus for making bags
US4735601A (en) Device serving to fashion carrying handles for attachment to sheet wrapping material
US3640187A (en) Bagmaking machines for making plastics side-fold bags with carrier handles
US2275976A (en) Folding, sealing, and cutting mechanism