DE3606204A1 - DEVICE FOR CONTINUOUSLY WELDING MULTI-LAYER FILM LINES - Google Patents

DEVICE FOR CONTINUOUSLY WELDING MULTI-LAYER FILM LINES

Info

Publication number
DE3606204A1
DE3606204A1 DE19863606204 DE3606204A DE3606204A1 DE 3606204 A1 DE3606204 A1 DE 3606204A1 DE 19863606204 DE19863606204 DE 19863606204 DE 3606204 A DE3606204 A DE 3606204A DE 3606204 A1 DE3606204 A1 DE 3606204A1
Authority
DE
Germany
Prior art keywords
cooling
housing
housings
profiles
hot air
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.)
Ceased
Application number
DE19863606204
Other languages
German (de)
Inventor
Günter 4800 Bielefeld Mattiebe
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Priority to DE19863606204 priority Critical patent/DE3606204A1/en
Priority to GB8606815A priority patent/GB2174333A/en
Publication of DE3606204A1 publication Critical patent/DE3606204A1/en
Ceased 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
    • B29C66/80—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
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7888—Means for handling of moving sheets or webs
    • B29C65/7894—Means for handling of moving sheets or webs of continuously moving sheets or webs
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
    • 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
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/81815—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 of the clamps
    • 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
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91641—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time
    • B29C66/91643—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile
    • B29C66/91645—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux the heat or the thermal flux being non-constant over time following a heat-time profile by steps
    • 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
    • B29C66/92611—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 controlling or regulating the gap between the joining 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
    • B29C66/80—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
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—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
    • B29C66/92611—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 controlling or regulating the gap between the joining tools
    • B29C66/92613—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 controlling or regulating the gap between the joining tools the gap being kept constant over time
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/932—Measuring or controlling the joining process by measuring or controlling the speed by measuring the speed
    • 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
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93441—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed the speed being non-constant over time
    • 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
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Windmöller & Hölscher, 4540 LengerichWindmöller & Hölscher, 4540 Lengerich

Vorrichtung zum fortlaufenden Verschweißen von mehrlagigen FolienbahnenDevice for continuous welding of multi-layer film webs

Die Erfindung betrifft eine Vorrichtung zum fortlaufenden Verschweißen von übereinanderliegenden Lagen aus thermoplastischer Kunststoffolie, die zwischen zwei sich gegenüberliegenden, einander zu gerichteten Heizkörpern hindurchgeführt werden, wobei jeder Heizkörper als ein in einem Gehäuse gelagerter Wärmestrahler ausgebildet ist, das an seiner der Kunststoffolie zugewandten Seite einen sich über die Länge des Wärmestrahlers erstreckenden Schlitz aufweist.The invention relates to a device for the continuous welding of layers of thermoplastic material lying one on top of the other Plastic film, which is between two opposite, directed radiators through each other, each radiator as one in one Housing mounted heat radiator is formed, which on its side facing the plastic film a has over the length of the radiant heater extending slot.

\kj Eine derartige Vorrichtung ist bexspielsweise aus der \ kj Such a device is, for example, from

deutschen Patentschrift 2 145 870 bekannt. Der Nachteil einer solchen bekannten Vorrichtung ist im wesentlichen darin zu sehen, daß die Schweißleistung zu gering ist, um mehrere Folienlagen im schnellen Durchlauf miteinanderGerman Patent 2,145,870 known. The disadvantage such a known device is to be seen essentially in the fact that the welding power is too low to several layers of film with one another in rapid succession

sicher verbinden zu können. Ein weiterer Nachteil liegt darin, daß die bekannte Vorrichtung hinsichtlich ihrer Wärmeabgabe an die Folie nicht der Durchlaufgeschwindigkeit der Folie durch die Schweißvorrichtung angepaßt werden kann, so daß sich bei wechselnder Foliendurchlaufgeschwindigkeit unterschiedliche Schweißqualitäten ergeben.to be able to connect safely. Another disadvantage is that the known device in terms of its heat emission on the film cannot be adapted to the speed of the film through the welding device, so that Different welding qualities result with changing film speed.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art derart auszugestalten, daß die an sie zu stellenden Anforderungen insbesondere mit Hinblick auf eine genügend große Wärmeübertragung und im Hinblick auf die Regulierung der Wärmezufuhr in Abhängigkeit von der Durchlaufgeschwindigkeit der Bahn in zufriedenstellender Weise erfüllt werden.The present invention is therefore based on the object of designing a device of the type mentioned at the outset in such a way that that the requirements to be placed on them, especially with regard to a sufficiently large heat transfer and with regard to the regulation of the heat supply depending on the speed of the web in be met in a satisfactory manner.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die beiden Gehäuse außer den Schlitzen zumindest je eine Einlaßöffnung für die Zufuhr von Heißluft aufweisen.This object is achieved in that the both housings apart from the slots each have at least one inlet opening for the supply of hot air.

Statt der Schlitze können auch Reihen von aus Löchern bestehenden Austrittsdüsen vorgesehen sein.Instead of the slots, rows of outlet nozzles consisting of holes can also be provided.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous refinements of the invention are the subject matter of the subclaims.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels und einer einzigen dieses perspektivisch und teilweise im Schnitt darstellenden Figur näher erläutert.In the following, the invention is illustrated in perspective and in part by means of an exemplary embodiment and a single exemplary embodiment explained in more detail in the figure representing the section.

Mit einem Seitengestell 1 sind zwei hohle Trägerprofile 2 und relativ zur Folienbahn höhenverlagerbar verbunden. Der Einfachheit halber ist in der Zeichnung nur die Befestigung des Trägerprofils 2 am Seitengestell 1 dargestellt. In gleicher Weise ist aber auch das Trägerprofil 3 mit dem Seitengestell 1 verbunden. Wie aus der Figur zu erkennen ist, sindWith a side frame 1 are two hollow support profiles 2 and connected vertically displaceably relative to the film web. Of simplicity only the attachment of the support profile 2 to the side frame 1 is shown in the drawing. In the same However, the carrier profile 3 is also connected to the side frame 1. As can be seen from the figure, are

mit dem hohlen Trägerprofil 2 zwei Konsolen 4 und 5 fest verbunden, mit denen Hebel 6 und 7 einendig gelenkig verbunden sind. Die anderen Enden dieser Hebel stehen über eine Koppel 8 miteinander in Verbindung. Jeder Hebel 6 und 7 ist etwa in seiner Mitte mit einer Trägerwelle 9 und 10 verbunden, wobei die Trägerwelle 9 frei drehbar in dem Seitengestell 1 gelagert ist. Die Trägerwelle 10 bildet die Drehachse eines Schrittschaltmotors 11, welcher mittels eines Stützwinkels 12 fest mit dem Seitengestell 1 verschraubt ist. Je nach Anzahl der Schritte des Schrittmotors 11 kann also das Trägerprofil 2 in seiner Stellung zur Materialbahn eingestellt werden. In analoger Weise wir.d auch das Trägerprofil 3 verstellt.with the hollow support profile 2 two consoles 4 and 5 firmly connected, with which levers 6 and 7 are articulated at one end are. The other ends of these levers are over a Coupling 8 in connection with each other. Each lever 6 and 7 is connected to a support shaft 9 and 10 approximately in the middle, wherein the support shaft 9 is freely rotatably mounted in the side frame 1. The support shaft 10 forms the axis of rotation of a Stepping motor 11, which by means of a support bracket 12 is firmly screwed to the side frame 1. Depending on the number of steps of the stepper motor 11, that can Support profile 2 can be adjusted in its position to the web of material. The carrier profile is also used in an analogous manner 3 adjusted.

Beide Trägerprofile 2 und 3 sind als Isolierprofil hohl ausgebildet. Sie bilden je einen Zuführkanal 13 und 14, die außer von den Trägerprofilen noch von Gehäusen 15 und 16 allseits geschlossen sind. Die beiden Gehäuse 15, 16 haben einander zugewandte, sich über die ganze Länge der Gehäuse erstreckende Luftauslaßschlitze 17 und 18. Die die Zuführkanäle 13 und 14 abschließenden Wandteile der Gehäuse 15 und 16 weisen eine Vielzahl von Lufteinlaßöffnungen 19 und 20 auf. Über Heißluftzuführrohre 21 und 22 wird Luft in die Zuführkanäle 13 und 14 eingeblasen. Diese Luft tritt durch die öffnungen 19 und 20 in die Gehäuse 15 und 16 ein und durch die Schlitze 17 und 18 aus. Sie wird dabei durch in den Gehäusen auf nicht mehr dargestellte Weise gelagerte Wärmestrahler 23 und 24 aufgeheizt.Both support profiles 2 and 3 are hollow as an insulating profile. They each form a feed channel 13 and 14 which, in addition to the support profiles, also contain housings 15 and 16 are closed on all sides. The two housings 15, 16 face one another over the entire length of the housing extending air outlet slots 17 and 18. The wall parts of the housing 15 which close off the supply channels 13 and 14 and 16 have a plurality of air inlet openings 19 and 20 on. Air is drawn in via hot air supply pipes 21 and 22 the feed channels 13 and 14 blown in. This air enters the housings 15 and 16 through the openings 19 and 20 and through the slots 17 and 18 from. It is thereby stored in the housings in a manner not shown Heat radiators 23 and 24 heated.

Durch die beiden aus den Schlitzen 17 und 18 austretenden Luftstrahle wird die Folie-25, welche mehrlagig ist, verschweißt. Der Abstand der beiden Gehäuse 15 und 16 wird dabei durch die Schrittschaltmotore, von denen nur der Schrittschaltmotor 11 dargestellt ist, entsprechend derThe film 25, which is multilayered, is welded by the two air jets emerging from the slots 17 and 18. The distance between the two housings 15 and 16 is determined by the stepping motors, of which only the Stepper motor 11 is shown, corresponding to the

«Μ2Μ « Μ2Μ

Durchlaufgeschwindigkeit der mehrlagigen Folie 25 verringert bzw. vergrößert, so daß der aus den Schlitzen 17 und 18 stets gleichmäßig austretende Heißluftstrahl entsprechend dem Abstand der Gehäuse 15, 16 von den Kühlleisten 38 bis 41 mit einer geringeren bzw. einer größeren Menge von Umgebungsluft vermischt wird. Hierdurch werden stets gleichmäßige Schweißnahtqualitäten erreicht.The passage speed of the multilayer film 25 is reduced or increased, so that the one from the slots 17 and 18 is always evenly exiting hot air jet corresponding to the distance between the housing 15, 16 and the cooling strips 38 to 41 is mixed with a smaller or a larger amount of ambient air. This will always be uniform Weld quality achieved.

Wie aus der Figur hervorgeht, sind die Trägerprofile 2 und von je zwei Bügeln 26 und 27 umgriffen, wobei der Einfachheit halber nur jeweils ein ein Trägerprofil umgreifender Bügel dargestellt ist. Diese Bügel 26 und 27 sind über Bolzen 28 und 29 mit dem Seitengestell 1 verschraubt, wobei die Bolzen 28 und 29 nach Lösen der Schrauben 30 und 31 in Langlöchern 3 2 und 33 verschoben werden können, zwecks Höhenverlagerung der Bügel 26 und 27.As can be seen from the figure, the support profiles 2 and encompassed by two brackets 26 and 27, for the sake of simplicity only one each encompassing a carrier profile Bracket is shown. These brackets 26 and 27 are screwed to the side frame 1 via bolts 28 and 29, the Bolts 28 and 29 after loosening screws 30 and 31 in elongated holes 3 2 and 33 can be moved for the purpose of shifting the height of the bracket 26 and 27.

Die frei auslaufenden Enden der Bügel 26 und 27 tragen waagerecht verlaufende Tragleisten 34, 35, 36 und 37, wobei jede Tragleiste an ihrem dem Bügel abgewandten Ende mit einer Kühlleiste 38, 39, 40 und 41 verbunden ist. Diese Kühlleisten sind hohl und von Wasser.durchflossen. Die einander zugewandten Seiten eines Kühlleistenpaares 38, 39 bzw. 40, 41 verlaufen schräg nach außen, so daß ein keilförmiger freier Raum zwischen jeweils zwei Kühlleisten eines Kühlleistenpaares gebildet ist. In diese Räume tauchen die Gehäuse 15 und 16 in Abhängigkeit von der Durchlaufgeschwindigkeit der mehrlagigen Folienbahn 25 mehr oder weniger tief ein. Je nach Anzahl und Stärke der Folienlagen werden dabei die Kühlleisten 38, bzw. 40, 41 durch entsprechende Verlagerung der Bolzen 28 und 29 einmal fest eingestellt.The free ends of the bracket 26 and 27 carry horizontally extending support strips 34, 35, 36 and 37, each Support bar is connected to a cooling bar 38, 39, 40 and 41 at its end facing away from the bracket. These cooling bars are hollow and flowed through by water. Those facing each other Sides of a pair of cooling strips 38, 39 and 40, 41 run obliquely outwards, so that a wedge-shaped free space between two cooling strips of a pair of cooling strips are formed. The housings 15 and 16 are immersed in these spaces Depending on the speed of the multi-layer film web 25, a more or less deep. Depending on the number and The thickness of the film layers is thereby achieved by the cooling strips 38 or 40, 41 by shifting the bolts 28 accordingly and 29 fixed once.

Wie schon erwähnt, wird der Abstand der beiden Gehäuse 15 und 16 voneinander entsprechend der Durchlaufgeschwindigkeit der Folienbahn 25 eingestellt, und zwar durch eine mehrAs already mentioned, the distance between the two housings 15 and 16 is corresponding to the throughput speed the film web 25 set, by one more

<&■"·-■■'■'-' ■"■■:: <& ■ "· - ■■ '■' - ' ■" ■■ ::

oder minder große Anzahl von Schaltschritten von Schrittschaltrnotoren, wobei nur der obere Schrittschaltmotor 11. dargestellt ist. Bei Stillstand der mehrlagigen Folienbahn 25 werden die Trägerprofile 2 und 3 und damit auch die Gehäuse 15 und 16 so weit voneinander weggefahren, daß sich der Luftauslaßschlitz 17 oberhalb des KüLlleistenpaares 38 und 39 und der Luftauslaßschlitz 18 unterhalb des Kühlleistenpaares 40 und 41 befindet. Während "leser Stillstandszeit wird allerdings weiterhin Luft aus den Schlitzen 17 und 18 ausgeblasen. Diese ausgeblasenen Luftstrahlen werden abgelenkt. Zu diesem Zweck sind mit den Tragleisten 35 und 3 7 Kühlluftzufuhrrohre 42 und 43 verbunden, die sich parallel zu den Trägerprofilen 2 und 3 erstrecken und Luftauslaßschlitze 44 und 45 aufweisen, durch die Kaltluft ausgeblasen wird. Diese beiden Kaltluftstrahlen leiten dann die aus den Schlitzen 17 und 18 austretenden Heißluftstrahlen ab, so daß die Heißluftstrahlen nicht mehr auf die Folienbahn 25 gelangen können.or less large number of switching steps of stepping motors, only the upper stepping motor 11 being shown. When the multi-layer film web comes to a standstill 25, the support profiles 2 and 3 and thus also the housing 15 and 16 are moved so far away from each other that the air outlet slot 17 above the pair of cooling strips 38 and 39 and the air outlet slot 18 below the pair of cooling strips 40 and 41 is located. However, air continues to flow out of the slots 17 during the reader downtime and 18 blown out. These jets of air are blown out diverted. For this purpose, 7 cooling air supply pipes 42 and 43 are connected to the support strips 35 and 3, which are parallel to the support profiles 2 and 3 extend and air outlet slots 44 and 45 have through which cold air is blown out. These two jets of cold air then guide the out of the Slots 17 and 18 exiting hot air jets, so that the hot air jets can no longer reach the film web 25.

Zu erwähnen wäre noch, daß die Heißluftzufuhrrohre 21, 22 in Durchlaufrichtung der Folienbahn 25 (siehe Pfeil A) geneigt sind und einen spitzen Winkel mit den Trägerprofilen 2 und bilden. In dem dargestellten Ausführungsbeispiel wird nur an einer Seite der Folienbahn 25 eine Schweißnaht erzeugt, während der in der Figur dargestellte rechte Teil der Folienbahn 25 unverschweißt bleibt und von einem Rolltisch 46 unterstützt wird. Selbstverständlich ist es aber möglich, mehr als eine dargestellte Schweißeinrichtung vorzusehen, so daß gegebenenfalls eine zu bestimmende Anzahl von parallelen Nähten gebildet werden kann.It should also be mentioned that the hot air supply pipes 21, 22 are inclined in the direction of passage of the film web 25 (see arrow A) and an acute angle with the carrier profiles 2 and form. In the illustrated embodiment, a weld seam is produced on only one side of the film web 25, while the right part of the film web 25 shown in the figure remains unwelded and from a roller table 46 is supported. Of course, however, it is possible to provide more than one welding device shown, so that if necessary a number of parallel ones to be determined Seams can be formed.

Claims (19)

30--53Se-' (-Tw)die 10. April 1985 Windmöller & Hölscher, 4540 Lengerich Vorrichtung zum fortlaufenden Verschweißen von mehrlagigen Folienbahnen Patentansprüche:30--53Se- '(-Tw) April 10, 1985 Windmöller & Hölscher, 4540 Lengerich Device for the continuous welding of multi-layer film webs Patent claims: 1. Vorrichtung zum fortlaufenden Verschweißen von übereinanderliegenden Lagen aus thermoplastischer Kunststofffolie/ die zwischen zwei sich gegenüberliegenden, einander zugerichteten Heizkörpern hindurchgeführt werden, wobei jeder Heizkörper als ein in einem Gehäuse gelagerter Wärmestrahler ausgebildet ist, das an seiner der Kunststoffolie zugewandten Seite einen sich über die Länge des Wärmestrahlers erstreckenden Schlitz aufweist,1. Device for the continuous welding of superimposed Layers of thermoplastic plastic film / those between two opposite, one another trimmed radiators are passed through, each radiator as a stored in a housing Heat radiator is formed, which on its side facing the plastic film over the Has the length of the radiant heater extending slot, dadurch gekennzeichnet,characterized, daß die beiden Gehäuse (15/ 16) außer den Schlitzen (17, 18) zumindest je eine Einlaßöffnung (19, 20) für die Zufuhr von Heißluft aufweisen.that the two housings (15/16) except for the slots (17, 18) at least one inlet opening (19, 20) for each have the supply of hot air. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand der beiden Gehäuse (15, 16) zueinander veränderbar ist.2. Device according to claim 1, characterized in that that the distance between the two housings (15, 16) to each other is changeable. 3. Vorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß zwischen denbsiden Gehäusen (15, 16) beidseits neben den Schlitzen(17, 18) und parallel zu den Gehäusen (15, 16) sich erstreckende paarweise zusammenwirkende Kühlleisten (38, 39 bzw. 40, 41) vorgesehen sind.3. Device according to claims 1 and 2, characterized in that that between denbsiden housings (15, 16) on both sides next to the slots (17, 18) and parallel to the Housings (15, 16) extending in pairs cooperating cooling strips (38, 39 or 40, 41) are provided are. 4. Vorrichtung nach den Ansprüchen 1 bis 3, dadurch gekenn- * zeichnet, daß der Abstand der Kühlleisten (38, 39) zu4. Device according to claims 1 to 3, characterized in that the distance between the cooling strips (38, 39) is too J den Kühlleisten (40, 41) unabhängig von der Lage derJ the cooling strips (40, 41) regardless of the position of the Gehäuse (15, 16) veränderbar ist.Housing (15, 16) is changeable. 5. Vorrichtung nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die Kühlleisten (38 - 41) als Hohlprofile ausgebildet sind, die von einer Kühlflüssigkeit durchflossen werden.5. Device according to claims 1 to 4, characterized in that that the cooling strips (38 - 41) are designed as hollow profiles through which a cooling liquid flows will. 6. Vorrichtung nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß je zwei Kühlleisten (38, 39 bzw. 40, 41) mit mindestens zwei im Abstand zueinander angeordneten Bügeln (26, 27) fest verbunden sind, wobei die Bügel (26 und 27) höhenverlagerbar an einem Gestell (1) befestigt sind.6. Device according to claims 1 to 5, characterized in that that each two cooling strips (38, 39 or 40, 41) with at least two spaced apart Brackets (26, 27) are firmly connected, the brackets (26 and 27) being attached to a frame (1) such that they can be adjusted in height are. 7. Vorrichtung nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß parallel zu den Kühlleisten verlaufende Kühlluftzufuhrrohre (42, 43) von den Bügeln getragen werden, deren Austrittsöffnungen (44 und 45) derart angeordnet sind, daß Kühlluft in den Bereich zwischen je einem Kühlleistenpaar (38, 39 bzw. 40, 41) und dem ihm zugeordneten Gehäuse (15, 16) geblasen werden kann.7. Device according to claims 1 to 6, characterized in that that running parallel to the cooling strips cooling air supply pipes (42, 43) carried by the bracket are, the outlet openings (44 and 45) are arranged such that cooling air in the area between a pair of cooling strips (38, 39 or 40, 41) and the housing (15, 16) assigned to it can be blown. Vorrichtung nach den Ansprüchen 1 bis 7, dadurch gekennzeichnet, daß jedes Gehäuse (15, 16) einen Wandungsteil eines ringsum geschlossenen Heißluftzufuhrkanals (13, 14) bildet.Device according to Claims 1 to 7, characterized in that each housing (15, 16) has a wall part an all-round closed hot air supply channel (13, 14). 9. Vorrichtung nach den Ansprüchen 1 bis 8, dadurch gekennzeichnet, daß die Gehäuse (15, 16) mehrere Heißluftein- ^.laßöffnungen (19, 20) aufweisen, die in der dem jeweiligen Zuführkanal (13, 14) zugewandten Gehäusewand vorgesehen sind.9. Device according to claims 1 to 8, characterized in that that the housing (15, 16) have a plurality of hot air inlet openings (19, 20) which are in the respective Feed channel (13, 14) facing housing wall are provided. 10. Vorrichtung nach den Ansprüchen 1 bis 9, dadurch gekennzeichnet, daß die Zufuhrkanäle (13, 14) außer von den Gehäusen (15, 16) noch von Trägerprofilen (2, 3) gebildet werden, wobei die Trägerprofile (2, 3) als Isolierprofile ausgebildet sind.10. Device according to claims 1 to 9, characterized in that that the supply channels (13, 14) are formed by support profiles (2, 3) in addition to the housings (15, 16) the support profiles (2, 3) as insulating profiles are trained. 11. Vorrichtung nach den Ansprüchen 1 bis 10, dadurch gekennzeichnet, daß jedes Trägerprofil 2, 3 höhenverlagerbar ist und daß mit je einem Trägerprofil ein Gehäuse (15, 16) fest verbunden ist.11. Device according to claims 1 to 10, characterized in that that each support profile 2, 3 can be adjusted in height and that a housing (15, 16) with one support profile each is firmly connected. 12. Vorrichtung nach den Ansprüchen 1 bis 11, dadurch gekennzeichnet, daß die Trägerprofile (2, 3) mindestens ein Heißluftzuführrohr (21, 22) aufweisen.12. Device according to claims 1 to 11, characterized in that the carrier profiles (2, 3) at least have a hot air supply pipe (21, 22). 13. Vorrichtung nach den Ansprüchen 1 bis 12, dadurch gekennzeichnet, daß die Heißluftzufuhrrohre (21, 22) in Folienlaufrichtung geneigt sind und mit der Oberfläche der Trägerprofile (2, 3) einen spitzen Winkel bilden.13. Device according to claims 1 to 12, characterized characterized in that the hot air supply pipes (21, 22) are inclined in the direction of travel of the film and form an acute angle with the surface of the carrier profiles (2, 3). 14. Vorrichtung nach den Ansprüchen 1 bis 13, dadurch gekennzeichnet, daß jedes Trägerprofil (2, 3) an zwei Hebeln (6, 7) gelenkig angebunden ist, welche über Trägerwellen (9, 10) verschwenkbar sind.14. Device according to claims 1 to 13, characterized characterized in that each carrier profile (2, 3) is connected in an articulated manner to two levers (6, 7) which are connected via carrier shafts (9, 10) are pivotable. 15. Vorrichtung nach den Ansprüchen 1 bis 14, dadurch -.:.-- gekennzeichnet,- daß die. beiden Hebel (6, 7) miteinander über eine Koppel (8) verbunden sind.15. Device according to claims 1 to 14, characterized -.:.-- marked, - that the. two levers (6, 7) together are connected via a coupling (8). 16. Vorrichtung nach den Ansprüchen 1 bis 15, dadurch gekennzeichnet, daß eine Trägerwelle (10) die Drehachse eines an dem Seitengestell (1) befestigten Schrittschaltmotors (11) ist, wobei die Drehachse (10) einendig fest mit einem Hebel (7) verbunden ist.16. Device according to claims 1 to 15, characterized characterized in that a support shaft (10) is the axis of rotation a stepping motor (11) attached to the side frame (1), the axis of rotation (10) is firmly connected at one end to a lever (7). 17. Vorrichtung nach den Ansprüchen 1 bis 16, dadurch gekennzeichnet, daß die andere Trägerwelle (9) direkt einendig im Seitengestell (1) gelagert ist, deren anderes Ende einen Hebel (6) trägt.17. Device according to claims 1 to 16, characterized characterized in that the other support shaft (9) is mounted directly at one end in the side frame (1), whose the other end carries a lever (6). 18. Vorrichtung nach den Ansprüchen 1 bis 17, dadurch gekennzeichnet, daß die Zahl der Schritte des Schrittschaltmotors in Abhängigkeit von der Durchlaufgeschwindigkeit der zu verschweißenden Folien bestimmt ist, dergestalt, daß der Abstand der Heißluftaustrittsspalte oder -düsen (17, 18) zueinander mit ansteigender Foliendurchlaufgeschwindigkeit verringert wird.18. Device according to claims 1 to 17, characterized characterized in that the number of steps of the stepping motor as a function of the throughput speed the foils to be welded is determined in such a way that the distance between the hot air outlet gaps or nozzles (17, 18) relative to one another with increasing film speed is decreased. 19. Vorrichtung nach den Ansprüchen 1 bis 18, dadurch gekennzeichnet, daß bei Folienstillstand beide Trägerprofile (2, 3) so weit voneinander wegschwenkbar sind, daß der dann von den Kühlluftzuführrohren (42 und 43) ausgeblasene Kühlluftstrahl zwischen dem von einem Kühlleistenpaar (38, 39 bzw. 40, 41) und dem zugehörigen Gehäuse (15, 16) gebildeten Spalt hindurchtreten kann.19. Device according to claims 1 to 18, characterized in that both support profiles when the film is idle (2, 3) can be swiveled so far away from each other that the cooling air supply pipes (42 and 43) blown out cooling air jet between that of a pair of cooling strips (38, 39 or 40, 41) and the associated one Housing (15, 16) formed gap can pass. .20._;-Vorrichtung..nach_ den "Ansprüchen 1 bis 19, dadurch " . gekennzeichnet7-·-daß...die. einander zugewandten Seiten eines Kühlleistenpaares (38, 39 bzw. 40, 41) schräg nach außen verlaufen, wobei die Gehäuse (15, 16) in den so gebildeten keilförmigen Freiraum in Betriebsstellung eintauchen. .20 ._; - Device .. according to "Claims 1 to 19, thereby ". marked7- · -that ... the. facing sides of a pair of cooling strips (38, 39 or 40, 41) run obliquely outwards, the housings (15, 16) in Immerse the wedge-shaped free space thus formed in the operating position.
DE19863606204 1985-04-10 1986-02-26 DEVICE FOR CONTINUOUSLY WELDING MULTI-LAYER FILM LINES Ceased DE3606204A1 (en)

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DE19863606204 DE3606204A1 (en) 1985-04-10 1986-02-26 DEVICE FOR CONTINUOUSLY WELDING MULTI-LAYER FILM LINES
GB8606815A GB2174333A (en) 1985-04-10 1986-03-19 Apparatus for continuously welding multiply film webs

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DE19863606204 DE3606204A1 (en) 1985-04-10 1986-02-26 DEVICE FOR CONTINUOUSLY WELDING MULTI-LAYER FILM LINES

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
DE3740426A1 (en) * 1987-11-28 1989-06-08 4 P Nicolaus Kempten Gmbh Device for heating the edge region of a plastic lid
DE9304449U1 (en) * 1993-03-24 1993-05-27 Rovema - Verpackungsmaschinen Gmbh, 6301 Fernwald, De
DE4315631A1 (en) * 1993-05-04 1994-11-10 Pluemat Plate & Luebeck Gmbh & Co Process and apparatus for welding a port into a plastic bag or the like
EP0723853A2 (en) * 1995-01-27 1996-07-31 The Budd Company Hot and cool air bonding apparatus and method
DE10019300B4 (en) * 2000-04-19 2006-07-27 Kvt Bielefeld Gmbh Method for welding plastic parts

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Publication number Priority date Publication date Assignee Title
IT1207628B (en) * 1987-03-09 1989-05-25 Cestind Centro Studi Ind DIFFERENTIATED MULTIPLE ACTION SEALING DEVICE FOR PACKAGING MACHINES FOR DISPOSABLE BAGS-FILTERS FOR INFUSION PRODUCTS

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US3472721A (en) * 1966-01-24 1969-10-14 Research Inc Apparatus for lap joinder of plastic sheets
DE1604607A1 (en) * 1966-10-10 1972-01-13 Hans Lehmacher Device for welding the layers of thermoplastic plastic films

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US3462916A (en) * 1966-07-18 1969-08-26 Fibreboard Corp Apparatus for heat sealing cartons
GB1502773A (en) * 1974-02-14 1978-03-01 Thames Sack & Bag Co Ltd Heat sealing apparatus

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US3472721A (en) * 1966-01-24 1969-10-14 Research Inc Apparatus for lap joinder of plastic sheets
DE1604607A1 (en) * 1966-10-10 1972-01-13 Hans Lehmacher Device for welding the layers of thermoplastic plastic films

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740426A1 (en) * 1987-11-28 1989-06-08 4 P Nicolaus Kempten Gmbh Device for heating the edge region of a plastic lid
DE9304449U1 (en) * 1993-03-24 1993-05-27 Rovema - Verpackungsmaschinen Gmbh, 6301 Fernwald, De
DE4315631A1 (en) * 1993-05-04 1994-11-10 Pluemat Plate & Luebeck Gmbh & Co Process and apparatus for welding a port into a plastic bag or the like
EP0723853A2 (en) * 1995-01-27 1996-07-31 The Budd Company Hot and cool air bonding apparatus and method
EP0723853A3 (en) * 1995-01-27 1997-07-09 Budd Co Hot and cool air bonding apparatus and method
DE10019300B4 (en) * 2000-04-19 2006-07-27 Kvt Bielefeld Gmbh Method for welding plastic parts

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GB2174333A (en) 1986-11-05

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