EP0215394B1 - Appareil et méthode pour la fabrications de sacs - Google Patents

Appareil et méthode pour la fabrications de sacs Download PDF

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Publication number
EP0215394B1
EP0215394B1 EP86112290A EP86112290A EP0215394B1 EP 0215394 B1 EP0215394 B1 EP 0215394B1 EP 86112290 A EP86112290 A EP 86112290A EP 86112290 A EP86112290 A EP 86112290A EP 0215394 B1 EP0215394 B1 EP 0215394B1
Authority
EP
European Patent Office
Prior art keywords
segments
stack
perforating
web
knives
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
Application number
EP86112290A
Other languages
German (de)
English (en)
Other versions
EP0215394A1 (fr
Inventor
René François DeBin
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.)
FMC Corp
Original Assignee
FMC Corp
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 FMC Corp filed Critical FMC Corp
Publication of EP0215394A1 publication Critical patent/EP0215394A1/fr
Application granted granted Critical
Publication of EP0215394B1 publication Critical patent/EP0215394B1/fr
Expired legal-status Critical Current

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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
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/16—Cutting 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
    • B31B70/74—Auxiliary operations
    • B31B70/92—Delivering
    • B31B70/98—Delivering in stacks or bundles
    • B31B70/984—Stacking bags on wicket pins

Definitions

  • This invention relates to bag-making apparatus for producing plastics bags from segments, each segment being dimensioned to produce two bags, said apparatus comprising elongate upstanding members arranged to hold the segments as a stack, perforating means operable to produce two parallel, spaced lines of perforations, and cutter means operable to sever and seal the segments of the stack.
  • This prior application discloses a bag making procedure in which the elongate strip of thermoplastic web is provided with lines of perforation located centrally of the web strip. Each segment produced by the action of the seal bar contains the centrally located lines of perforation.
  • a rotary transfer device In transporting the web segment by a rotary transfer device, from the pickup station to the stacking station containing the upwardly projecting pins, partial or full separation along a line of perforation sometimes occurs. If full separation occurs while the web segment is in transit to the stacking station, stacking of that web segment cannot be achieved since registration with the stacking post is no longer possible. In the event partial separation occurs and stacking on the post is achieved a portion of that web segment may not lie in a position to produce a bag stack having the edges of each individual bag overlying each other.
  • the problem to be overcome is, therefore, to provide bag-making apparatus and method in which the risk of perforations provided in a web becoming effective to divide the web prematurely is eliminated.
  • means are operable on the web to provide each segment with at least two apertures located adjacent to and on either side of the median, considered in the longitudinal direction of the web, of each segment, the segments produced being transferred to a stacking device incorporating the upstanding members on which successive segments are stacked, the upstanding members extending through the aligned apertures of the stacked segments.
  • the perforated means are operative while a stack of segments is retained on the stacking device for producing lines of perforation enabling subsequent division of each segment to define two bags, and cutter means being operable concurrently or subsequently to the perforating means.
  • apparatus for perforating a plurality of web segments provided with holes received on stacking posts serving to retain the segments in a stack
  • the perforating device being characterized by a pair of simultaneously operable linear actuators mounted on a support located above the stack and through which support the output rods project, a crosshead fixed to the actuator rods, means carried by said crosshead for compressing the stack, and means also carried by said crosshead for perforating the stack, while compressed, to provide a line of weakness to facilitate separation of a portion of each web segment.
  • a holder for supporting the perforating means and means carried by the holder serve to heat the perforating means to a temperature sufficient to encourage softening of the material of the segments.
  • the holder also serves to support the perforating means in the form of an elongate flat bladelike member clamped to a recess formed in the holder and provided with a series of slots interrupting the sharpened bleeding edge thereby to produce a series of incissions and uncut bond portions, the latter being sufficiently weak to allow easy separation of a layer of the material of the segments.
  • compressing means are provided then preferably the compressing means are operable before the perforating means.
  • United Kingdom Application No. 81.28656 discloses, in Figures 9 and 10, a cutting station substantially similar to the cutting station disclosed herein.
  • a web roll WR is mounted on a transverse shaft 20 rotatably supported by an unwind stand 22 carried by a frame structure 24.
  • the web strip unwound from the web roll WR passes over a series of rolls collectively identified by the numeral 26 and then progresses over a series of rolls rotatably mounted in a tower structure 28 which includes gusseting devices 30.
  • Unreeling of the web strip from the web roll is accomplished by drive rolls 32 and thereafter the web is passed over a series of rolls comprising a web tensioning device 34.
  • a turning roll 36 directs the web strip to draw rolls 37 which are intermittently operated by the drive of a bag machine 38.
  • thermoplastic film TF is advanced by the draw rolls to a severing and sealing station 40 and the portion of web advanced is momentarily retained on a series of belts 42 generally describing a triangular path and defining a transfer station TS.
  • a rotary transfer mechanism 44 which includes a plurality of regularly spaced radially extending tubular bars 46, connected through a hub 48 to a source of vacuum, engages and retains a web segment at the transfer station and translates it through an arc for reception by one of a series of stacking devices 50 located at a stacking station 52.
  • each segment has a central medial strip removed from one panel and the remaining panel is provided with four holes 54 through which project stacking pins or posts 56 projecting upwardly and fixed to a base plate of the stacking devices 50.
  • the posts 56 are located to correspond to the spacing of the holes 54 so that each web segment is retained on the stacking devices 50 by the posts 56.
  • FIG. 1 B will reveal the provision of a conveyor 58 that is intermittently driven by drive mechanism 60 such that the upper reach of the conveyor is incrementally advanced from right to left as viewed in Figure 1 B. Also, as revealed by this Figure, the stacking devices 50 are mounted on the conveyor and successive stacking devices are positioned at the stacking station 52 for a period of time required to accumulate a selected number of web segments.
  • the problem of premature partial or complete detachment of a portion of a web segment WS, along a line of perforation does not arise since the web segments produced by the bag machine do not include perforations. Accordingly, forces created by air pressure in the course of transferring a web segment by the transfer device 44 from the transfer station TS to the stacking station 52 are easily tolerated by the web segment.
  • the bag stacks produced include perforations but their creation occurs while a stack of web segments is retained on the stacking posts 56 carried by the stacking devices 50.
  • the conveyor 58 is inactive.
  • the perforating means 62 and the cutting means 64 are rendered operative, sequentially or concurrently, to effect, respectively, perforation and separation of the accumulated web segments to produce two individual bag stacks each of which contain a line of perforation.
  • the preferred construction of the perforating means 62 comprises linear actuators 68 secured to a flat plate 70 which is in turn adjustably secured to horizontal supports 72 ( Figure 1 B) of the frame structure 66.
  • the plate 70 is provided with bores through which extend the rods 74 of the linear actuator 68.
  • the extremity of each rod 74 is fixed to a crosshead 76 carrying downwardly projecting perforating knife holders 78.
  • the knife holders 78 are secured to the crossheads 76 by a series of bolts 80 passing through insulating spacer blocks 82 and threaded into the perforating knife holders 78.
  • Perforating knives 84 are secured to the holders 78 by a series of fasteners 86 and the perforating knives 84 extend beyond the holders 78 sufficient to penetrate a stack of web segments.
  • Figure 8 shows the general configuration of each of the perforating knives, and it will be seen that each knife is provided with a series of slots 88 creating an interruption in the line of cut defined by a cutting edge 90 which may take the form of a jagged edge which experience has shown requires less force to penetrate each stack of web segments.
  • each of the perforating knife holders 78 is provided with a slug heater 92 which can be energized to produce a given temperature to each of the knives 84. Heating of the knives 84 has been found to reduce the amount of force necessary to penetrate a stack of web segments and yet the tendency to form a blocked stack does not arise when a sufficiently low temperature level is selected.
  • the compressing means 94 include elongate offset bars 96 which are substantially equal in length to the perforating knives 84 and make contact with the stack adjacent the line of perforation established by the knives 84.
  • the bars 96 are connected to the crosshead 76 by spring biased rods 98 which slidably extend through bushings 100 mounted in the crosshead 76.
  • a stop member 102 is secured to the upper end of the rod 98 by a fastener 104 to limit and retain the rods 98 in the bushings 100.
  • the stacking devices 50 are provided with inserts 106 which can be made of wood or plastic material which will allow penetration of the knives 84 and yet have a minimal effect in rendering the cutting edge of the knives dull.
  • the cutting means 64 is located downstream and adjacent the perforating means 62 and if desired the perforating means and the cutting means can be actuated simultaneously or sequentially at the option of the user.
  • Figures 6 and 7 illustrate the cutting means 64 in greater detail and it will be seen to comprise linear actuators 108 also mounted on the flat plate 70 being suitably bored to accommodate reciprocating movement of rods 110 having their lower ends threaded to receive a nut 112 fastening the rods to a crosshead 114.
  • a knife holder 116 is in turn connected to the crosshead -114 by bolts 118 extending through insulating spacers 120.
  • the cutting means is provided with stack compressing means 122 which include presser bars 124 rigidly connected to rods 126 having their upper ends slidably disposed, by means of bushings 128, to the crosshead 114.
  • Tension springs 130 are associated with each of the rods and serve to bias the presser bars 124 downwardly.
  • the knife holder 116 is formed to receive and retain a cutting knife 132 and rod heaters 134 serving to heat the knife 132 to a desired temperature to facilitate cutting of the web segments, while they are retained on the pins 56, into two bag stacks each of which includes a line of perforation previously made by the perforating means 62.
  • cutting means 64 includes, in the stacking device 50, an insert 136 selected of a material such as previously indicated to prevent dulling of the cutting edge of the knife 132.
  • the knife 132 is retained in the holder 116 by a plurality of fasteners 138.
  • Reference to Figures 3, 4 and 5 shows the condition of a stack of web segments at the stacking station 52, the perforating station 62 and the cutting station 64.
  • the conveyor positions a stack of web segments WS at the perforating station 62 and the actuators 68 are operated to drive the perforating knives 84 to cut the web segments, lines of perforation 85 are produced adjacent the stacking posts 56.
  • the cutting station 64, operating the parting knife 132 may be concurrently or subsequently operated to produce two bag stacks BS by cutting the web segments along a line PS, located between the stacking posts 56.

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  • Making Paper Articles (AREA)

Claims (7)

1. Appareil pour fabriquer des sachets, destiné à la production de sachets en matière plastique à partir de segments de nappe (WS), chaque segment ayant une taille dimensionnée pour produire deux sachets (BS), cet appareil comportant des éléments allongés dirigés vers le haut (56) disposés de façon à maintenir plusieurs segments de nappe en une pile, et des moyens de perforation utilisables pour produire dans chaque segment de nappe deux lignes de perforations (85) espacées et parallèles, caractérisé en ce que les moyens de perforation (62) sont placés de façon à perforer les segments de nappe de sorte que l'opération s'effectue sur les piles de segments (WS) pendant que les segments sont maintenus dans la pile par les éléments (56) dirigés vers le haut, et comprennent deux actionneurs linéaires (68), utilisables simultanément, montés sur un support (70) placé au-dessus de la pile à perforer et au travers duquel font saillie des tiges d'actionnement, une traverse (76) fixée aux tiges d'actionnement, des couteaux (84) à mouvement de va-et- vient munis d'arêtes coupantes interrompues, montés sur la traverse, et des moyens (94) portés par la traverse et destinés à comprimer la pile, les couteaux (84) fonctionnant pour perforer une pile pendant que les moyens de compression (94) fonctionnent pour comprimer la pile.
2. Appareil selon la revendication 1, caractérisé par un support (78) portant les couteaux de perforation (84) et des moyens (92) portés par ce support et destinés à chauffer les couteaux de manière à faciliter la pénétration de la matière de la nappe.
3. Appareil selon la revendication 2, caractérisé en ce que chaque couteau de perforation comprend un élément plat allongé (84) serré sur un renfoncement ménagé dans le support (78) et muni d'une série de fentes (88) interrompant l'arête d'attaque coupante de manière à produire une série d'incisions et de parties de liaison non coupées suffisamment faibles pour permettre une séparation facile d'une couche de matière thermoplastique.
4. Appareil selon l'une quelconque des revendications 1 à 3, caractérisé en outre en ce que les moyens de compression (94) fonctionnent pour faire prise sur la matière des segments avant que celle-ci ne soit attaquée par les couteaux de perforation (84).
5. Procédé de fabrication de deux sachets en matière thermoplastique à partir de plusieurs segments tubulaires aplatis ayant chacun deux lignes de perforations espacées et parallèles, comprenant les étapes qui consistent à amener les segments selon un trajet courbe, et à draper un nombre prédéterminé de segments sur un dispositif d'empilage mobile alors qu'ils sont maintenus en une pile par des paires de broches espacées longitudinalement qui s'étendent vers le haut à partir du dispositif d'empilage et s'engagent dans des paires de trous espacés longitudinalement prévues dans chaque segment, caractérisé par les étapes additionnelles qui consistent à déplacer le dispositif d'empilage jusqu'à un dispositif de perforation (76, 84), et à perforer la pile de segments au moyen du dispositif de perforation le long des deux lignes de perforations longitudinales, parallèles aux broches et espacées latéralement vers l'extérieur de celles-ci de manière à définir deux piles de sachets réunis les uns aux autres le long des lignes de perforations, drapés sur les côtés latéraux opposés du dispositif d'empilage et montés sur les paires respectives de broches espacées longitudinalement.
6. Procédé selon la revendication 5, dans lequel le dispositif d'empilage a deux paires de broches dirigées vers le haut et espacées longitudinalement et latéralement, et dans lequel les lignes de perforations s'étendent parallèlement aux paires de broches espacées longitudinalement et sont espacées latéralement vers l'extérieur de celles-ci.
7. Procédé selon la revendication 6, incluant l'étape qui consiste à chauffer le dispositif de perforation à une température suffisante pour qu'il pénètre facilement dans la pile sans que les segments de la pile adhèrent entre eux.
EP86112290A 1983-09-02 1984-08-13 Appareil et méthode pour la fabrications de sacs Expired EP0215394B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52892683A 1983-09-02 1983-09-02
US528926 1990-05-25

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP84305500.5 Division 1984-08-13

Publications (2)

Publication Number Publication Date
EP0215394A1 EP0215394A1 (fr) 1987-03-25
EP0215394B1 true EP0215394B1 (fr) 1989-11-23

Family

ID=24107788

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84305500A Expired EP0134711B1 (fr) 1983-09-02 1984-08-13 Machine pour fabriquer des sachets avec tourniquet jumelé
EP86112290A Expired EP0215394B1 (fr) 1983-09-02 1984-08-13 Appareil et méthode pour la fabrications de sacs

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP84305500A Expired EP0134711B1 (fr) 1983-09-02 1984-08-13 Machine pour fabriquer des sachets avec tourniquet jumelé

Country Status (8)

Country Link
EP (2) EP0134711B1 (fr)
JP (1) JPH0649346B2 (fr)
AU (1) AU570707B2 (fr)
BR (1) BR8404370A (fr)
CA (1) CA1225856A (fr)
DE (1) DE3470012D1 (fr)
ES (1) ES535585A0 (fr)
GB (2) GB2145658B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668148A (en) * 1985-06-27 1987-05-26 Fmc Corporation Sheet stacking and transferring device
US4699607A (en) * 1985-11-06 1987-10-13 Fmc Corporation Method and apparatus for producing bags
CA1291771C (fr) * 1986-11-03 1991-11-05 Rene F. Debin Empileuse a guichet a interruption du cycle a l'epuisement des reserves
EP0337039A1 (fr) * 1988-04-13 1989-10-18 C.E.E.- Compagnie Europeenne Des Emballages Robert Schisler Machine pour la manutention d'articles plats, notamment sacs ou sachets, à la sortie d'une machine de fabrication
FR2607798B1 (fr) * 1986-12-03 1990-03-30 Schisler Cie Europ Emballages Machine pour la manutention d'articles plats, notamment sacs ou sachets a la sortie d'une machine de fabrication
RU2556979C2 (ru) 2009-09-15 2015-07-20 Басф Се Фотолатентные титановые катализаторы
EP2694211A1 (fr) 2011-04-05 2014-02-12 Basf Se Catalyseurs oxo-chélates de titane, photolatents

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA976397A (en) * 1971-08-17 1975-10-21 Hans Lehmacher Method and device for manufacturing bags or similar packaging means as well as carrying bags stacked in a block
GB1434394A (en) * 1972-07-03 1976-05-05 Joice R L Stacking machine
DE2254448A1 (de) * 1972-11-07 1974-05-22 Windmoeller & Hoelscher Verfahren und vorrichtung zur herstellung von beutelblocks aus thermoplastischem kunststoff
DE2302477C3 (de) * 1973-01-19 1981-03-26 Stiegler GmbH Maschinenfabrik, 73635 Rudersberg Vorrichtung zum Fördern eines aus folienförmigen Abschnitten gestapelten Stapels
DE2526014C2 (de) * 1975-06-11 1988-04-14 Hans 5216 Niederkassel Lehmacher Verfahren zur paarweisen Herstellung von seitengeschweißten Tragetaschen
BE885414A (nl) * 1980-09-26 1981-03-26 Fmc Europe Inrichting voor het stapelen van kunststofzakken
US4500307A (en) * 1981-10-23 1985-02-19 Bridgeman Danial N P Apparatus for producing continuous bags of thin wall material

Also Published As

Publication number Publication date
GB8420542D0 (en) 1984-09-19
EP0134711B1 (fr) 1988-03-23
GB2145658A (en) 1985-04-03
EP0134711A2 (fr) 1985-03-20
GB2179887B (en) 1988-06-15
JPH0649346B2 (ja) 1994-06-29
ES8505582A1 (es) 1985-06-01
AU570707B2 (en) 1988-03-24
EP0215394A1 (fr) 1987-03-25
GB8620452D0 (en) 1986-10-01
DE3470012D1 (en) 1988-04-28
AU3147584A (en) 1985-03-07
JPS6076331A (ja) 1985-04-30
BR8404370A (pt) 1985-07-30
GB2179887A (en) 1987-03-18
EP0134711A3 (en) 1985-04-17
ES535585A0 (es) 1985-06-01
GB2145658B (en) 1988-06-29
CA1225856A (fr) 1987-08-25

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