CH432345A - Device for welding together heat-sealable folding flaps - Google Patents

Device for welding together heat-sealable folding flaps

Info

Publication number
CH432345A
CH432345A CH274266A CH274266A CH432345A CH 432345 A CH432345 A CH 432345A CH 274266 A CH274266 A CH 274266A CH 274266 A CH274266 A CH 274266A CH 432345 A CH432345 A CH 432345A
Authority
CH
Switzerland
Prior art keywords
packs
metal
sealable
heated
welding
Prior art date
Application number
CH274266A
Other languages
German (de)
Inventor
Heinzer Hans
Original Assignee
Sig Schweiz Industrieges
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 Sig Schweiz Industrieges filed Critical Sig Schweiz Industrieges
Priority to CH274266A priority Critical patent/CH432345A/en
Priority to FR93660A priority patent/FR1510401A/en
Publication of CH432345A publication Critical patent/CH432345A/en

Links

Classifications

    • 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
    • B65B51/20—Applying or generating heat or pressure or combinations thereof by fluid pressure acting directly on folds or on opposed surfaces, e.g. using hot-air jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/245—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved contactless, e.g. by radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/26—Hot fluid
    • 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
    • B29C66/005—Detaching the article from the joining tool
    • 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
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • 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
    • B29C66/83421—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types
    • B29C66/83423—Roller, cylinder or drum types; Band or belt types; Ball types band or belt types cooperating bands or belts
    • 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
    • B65B51/18—Applying or generating heat or pressure or combinations thereof by endless bands or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/242—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool the heat transfer being achieved by contact, i.e. a heated tool being brought into contact with the welding tool and afterwards withdrawn from it
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B29C66/81611—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material by resilient material
    • 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

Description

       

  
 



  Vorrichtung zum   Zusammenschweissen    von heissiegelfähigen Faltlappen
Die Erfindung betrifft eine Vorrichtung zum Zusammenschweissen von heissiegelfähigen Faltlappen auf mindestens einer Fläche von Packungen mittels eines erwärmten Schweissgliedes.



   Es ist allgemein bekannt, bei der Herstellung von Packungen, die an die Flächen eines Gegenstandes angelegten Faltlappen von Packungen mittels Schweissbacken   oder-stempeln    zusammen zu schweissen. Diese Schweissglieder werden meist durch elektrische Stromstösse erwärmt und müssen so lange auf die Schweissstelle aufgepresst bleiben, bis sie unter die Fliesstemperatur des zu verschweissenden Materials abgekühlt sind, damit eine einwandfreie Schweissung erzielt werden kann. Dies bedingt, dass der Schweissvorgang eine gewisse Zeit beansprucht, während welcher die zu verschliessende Packung unter dem Schweissglied angehalten werden muss. Die Förderung der Packungen kann deshalb nur schrittweise erfolgen.



   Um eine höhere Produktion zu erreichen, hat man bereits vorgeschlagen, die Schweissbacken mit den Pakkungen über eine gewisse Strecke mitzubewegen und sie dann wieder in ihre Ausgangslage zurückzubewegen.



  Der Schweissvorgang kann dann während der Förderbewegung der Packungen vollzogen werden. Dies bedingt aber einen grossen konstruktiven Aufwand. Oft ist auch bei Verpackungsmaschinen der für solche   eine und    herlaufende Schweissbacken erforderliche Raum nicht vorhanden. Die Erfindung bezweckt eine Vorrichtung zu schaffen, welche die erwähnten Nachteile nicht aufweist.



  Erfindungsgemäss ist das Schweissglied ein endloses, über Umlenkrollen geführtes umlaufendes Metallband, das durch beheizte Umlenkrollen und/oder durch Heissgasdüsen beheizt ist.



   Vorzugsweise sind zwei endlose Metallbänder vorgesehen, die über einen Teil ihrer Länge parallel verlaufen und eine Förderstrecke für die Packungen bilden, wobei sie die Packungen auf ihren Stirnseiten festklemmen.



   In der Zeichnung sind Ausführungsbeispiele des Erfindungsgegenstandes dargestellt. Es zeigen:
Fig. 1 eine erste Ausführungsform einer Vorrichtung zum Befestigen von   heissiegelfähigen    Faltlappen in schematischer Darstellung;
Fig. 2 eine Variante der Vorrichtung nach Fig. 1;
Fig. 3 eine Ansicht eines endlosen Metallbandes mit zusätzlichen Anpressrollen und
Fig. 4 eine Draufsicht auf Fig. 3.   



   Die Vorrichtung g nach Fig. 1 weist zwei endlose    Metallbänder 2 auf, die um Umlenkrollen 3, 4 umlaufen.



  Die beiden Metallbänder bilden ein Fördermittel für die Packungen 1, die in einer Führung 5 von einer Faltvor  richtsur4g zugeführ, werden. Die Packungen 1, aus heiss-    siegelfähigem   Einschlagmaterial    sind bereits fertiggestellt, doch müssen an ihren Stirnseiten die eingefalteten Lappen noch zusammengeschweisst werden.



   Die Umlenkrollen 3 sind zu diesem Zweck mittels elektrischen Widerstandselementen 6 beheizt. Sie übertragen ihre Wärme auf die Metallbänder 3, die somit als Schweissglieder wirken und während ihres Umlaufes die Faltlappen festschweissen. Um die Temperatur der Metallbänder 2 unter die Fliesstemperatur des Ein  schlagmaterials    zu senken, bevor die Packungen 1 freigegeben werden, sind vor den Umlenkrollen 4 eine Anzahl Kaltluftdüsen 7 angeordnet.



   Es hat sich gezeigt, dass als Bandmaterial für die Bänder 2 am   zweckmässigsten    ein Metallgeflecht verwendet wird. Gute Resultate wurden mit einem Tressengewebe erzielt, dessen Schussdrähte 0,34 und dessen Kettendrähte 0,28 mm Durchmesser aufweisen.



   In Fig. 2 ist eine andere Ausführungsform der Vor  richtun, g dargestellt. Die Metall band er 2 und die Umlenk-      rollen    3,4   sind      grlualdsätich      gleich    wie   in    Fig. 1   ansge-    bildet. Die-Beheizung der Bänder 2 und der Umlenkrollen 3 erfolgt dagegen durch eine grössere Zahl von Heissluft- oder Heissgasdüsen 8, die schraffiert dargestellt sind, während die Kühlluftdüsen 7 der Ausführungsform nach Fig. 1 entsprechen. Nötigenfalls können, wie dargestellt, die Umlenkrollen 4 ebenfalls durch Kühlluftdüsen 7 gekühlt werden.  



   Um eine bessere Anpressung der Metallbänder an die Stirnseiten der Packungen 1 zu erzielen, können gegen das auf die Stirnseiten der Packung gerichtete Trum der Metallbänder 2 Anpressrollen wirken, die über Blattfedern 10 oder ähnliche Federmittel auf einem Träger 11 befestigt sind, der seinerseits zur Veränderung der Anpresskraft der Rollen 9 verstellbar ist. Die Verteilung der Rollen 9 über die Breite und Länge des Metallbandes 2 ist aus Fig. 4 ersichtlich. Zwischen den einzelnen Rollenreihen können Heissgasdüsen und nötigenfalls auch Kühlluftdüsen gemäss der Ausführungsform nach Fig. 2 vorgesehen sein.   



  
 



  Device for welding together heat-sealable folding flaps
The invention relates to a device for welding together heat-sealable folding flaps on at least one surface of packs by means of a heated welding member.



   It is generally known, in the production of packs, to weld the folding tabs of packs placed against the surfaces of an object together by means of welding jaws or stamps. These weld links are usually heated by electric current surges and must remain pressed onto the weld point until they have cooled down below the flow temperature of the material to be welded, so that a perfect weld can be achieved. This means that the welding process takes a certain amount of time, during which the pack to be closed has to be stopped under the welding link. The packs can therefore only be promoted gradually.



   In order to achieve higher production, it has already been proposed to move the welding jaws with the packs over a certain distance and then to move them back to their starting position.



  The welding process can then be carried out during the conveying movement of the packs. However, this requires a great deal of constructive effort. Often the space required for such welding jaws moving in and out is also not available in packaging machines. The invention aims to provide a device which does not have the disadvantages mentioned.



  According to the invention, the welding link is an endless, revolving metal strip which is guided over deflection rollers and which is heated by heated deflection rollers and / or by hot gas nozzles.



   Preferably, two endless metal belts are provided, which run parallel over part of their length and form a conveying path for the packs, whereby they clamp the packs on their end faces.



   Exemplary embodiments of the subject matter of the invention are shown in the drawing. Show it:
1 shows a first embodiment of a device for fastening heat-sealable folding flaps in a schematic representation;
FIG. 2 shows a variant of the device according to FIG. 1;
3 shows a view of an endless metal belt with additional pressure rollers and
FIG. 4 is a plan view of FIG. 3.



   The device g according to FIG. 1 has two endless metal belts 2 which revolve around pulleys 3, 4.



  The two metal belts form a conveyor for the packs 1, which are fed in a guide 5 from a folding device. The packs 1 made of heat-sealable wrapping material have already been completed, but the folded flaps still have to be welded together on their end faces.



   For this purpose, the pulleys 3 are heated by means of electrical resistance elements 6. They transfer their heat to the metal strips 3, which thus act as welding links and weld the folding tabs in place during their rotation. In order to lower the temperature of the metal strips 2 below the flow temperature of the impact material, before the packs 1 are released, a number of cold air nozzles 7 are arranged in front of the pulleys 4.



   It has been shown that a metal mesh is most expediently used as the band material for the bands 2. Good results have been achieved with a braided weave whose weft wires are 0.34 mm and the warp wires are 0.28 mm in diameter.



   In Fig. 2, another embodiment of the device is shown before, g. The metal band 2 and the deflection rollers 3, 4 are basically the same as in FIG. 1. On the other hand, the belts 2 and the deflection rollers 3 are heated by a large number of hot air or hot gas nozzles 8, which are shown hatched, while the cooling air nozzles 7 correspond to the embodiment according to FIG. If necessary, as shown, the pulleys 4 can also be cooled by cooling air nozzles 7.



   In order to achieve a better pressing of the metal strips against the end faces of the packs 1, pressure rollers 2 can act against the strand of the metal strips directed towards the end faces of the pack, which are fastened via leaf springs 10 or similar spring means on a carrier 11, which in turn is used to change the Contact pressure of the rollers 9 is adjustable. The distribution of the rollers 9 over the width and length of the metal strip 2 can be seen from FIG. Hot gas nozzles and, if necessary, cooling air nozzles according to the embodiment according to FIG. 2 can be provided between the individual rows of rollers.

Claims (1)

PATENTANSPRUCH Vorrichtung zum Zusammenschweissen von heissiegelfähigen Faltlappen auf mindestens einer Fläche von Packungen mittels eines erwärmten Schweissgliedes, dadurch gekennzeichnet, dass das Schweissglied ein endloses, über Umlenkrollen (3, 4) geführtes umlaufendes Metallband (2) ist, das durch beheizte Umlenkrollen undioder, durch Heissgasdwsen (8) beheizt ist. PATENT CLAIM Device for welding together heat-sealable folding flaps on at least one surface of packs by means of a heated welding member, characterized in that the welding member is an endless, revolving metal band (2) guided over deflection rollers (3, 4), which is guided by heated deflection rollers and / or by hot gas nozzles ( 8) is heated. UNTERANSPRÜCHE 1. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass das Metallband (2) aus einem Metallgeflecht besteht. SUBCLAIMS 1. Device according to claim, characterized in that the metal strip (2) consists of a metal mesh. 2. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass zwei endlose Metallbänder (2) vorgesehen sind, die über einen Teil ihrer Länge parallel verlaufen und eine Förderstrecke für die Packungen (1) bilden, wobei sie die Packungen auf ihren Stirnseiten festklemmen. 2. Device according to claim, characterized in that two endless metal belts (2) are provided which run parallel over part of their length and form a conveying path for the packs (1), whereby they clamp the packs on their end faces. 3. Vorrichtung nach Patentanspruch, dadurch gekennzeichnet, dass im Bereich des Endes der durch den parallel verlaufenden Teil der Metallbänder gebildeten Förderstrecke Kühlgasdüsen (7) zum Abkühlen der Metallbänder (2) vorgesehen sind. 3. Device according to claim, characterized in that cooling gas nozzles (7) for cooling the metal strips (2) are provided in the region of the end of the conveying path formed by the parallel part of the metal belts. 4. Vorrichtung nach Unteranspruch 2, dadurch gekennzeichnet, dass zum Anpressen der Metallbänder (2) gegen die Stirnseiten der Packungen (1) federnde Spannrollen (9) vorgesehen sind. 4. Device according to dependent claim 2, characterized in that resilient tensioning rollers (9) are provided for pressing the metal strips (2) against the end faces of the packs (1).
CH274266A 1966-02-25 1966-02-25 Device for welding together heat-sealable folding flaps CH432345A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH274266A CH432345A (en) 1966-02-25 1966-02-25 Device for welding together heat-sealable folding flaps
FR93660A FR1510401A (en) 1966-02-25 1967-02-03 Device for securing folded shutters made of a material capable of being heat welded

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH274266A CH432345A (en) 1966-02-25 1966-02-25 Device for welding together heat-sealable folding flaps

Publications (1)

Publication Number Publication Date
CH432345A true CH432345A (en) 1967-03-15

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Application Number Title Priority Date Filing Date
CH274266A CH432345A (en) 1966-02-25 1966-02-25 Device for welding together heat-sealable folding flaps

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CH (1) CH432345A (en)
FR (1) FR1510401A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351553A1 (en) * 1988-07-20 1990-01-24 SASIB S.p.A. Device for sealing the overlapped end flaps of a thermoplastic material wrapper for packages, particularly for packages of cigarettes
DE102008039158A1 (en) * 2008-08-21 2010-03-04 Multivac Sepp Haggenmüller Gmbh & Co. Kg Chamber machine for sealing filled film bags has a sealing rail of a flexible plastics, which can be shaped and reshaped repeatedly for the bag designs

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES290056Y (en) * 1985-11-04 1986-10-16 Oive,S.A. PACKAGING MACHINE, FOR PACKAGING AND SEALED BY PACKAGING, CONTAINING AT LEAST ONE LAYER OF THERMOMOLDABLE MATERIAL
IT1398815B1 (en) * 2009-02-20 2013-03-21 Dall Omo DEVICE FOR THERMAL HOT LEMBI OVERLAPPING IN A WRAPPED PACKAGE OF ARTICLES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351553A1 (en) * 1988-07-20 1990-01-24 SASIB S.p.A. Device for sealing the overlapped end flaps of a thermoplastic material wrapper for packages, particularly for packages of cigarettes
DE102008039158A1 (en) * 2008-08-21 2010-03-04 Multivac Sepp Haggenmüller Gmbh & Co. Kg Chamber machine for sealing filled film bags has a sealing rail of a flexible plastics, which can be shaped and reshaped repeatedly for the bag designs
DE102008039158B4 (en) * 2008-08-21 2014-06-12 Multivac Sepp Haggenmüller Gmbh & Co. Kg Device for sealing packages

Also Published As

Publication number Publication date
FR1510401A (en) 1968-01-19

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