DE3046036A1 - Multilayer sealable paper bag has inner lining sealed - while closure flap is folded back to expose layers to heat - Google Patents

Multilayer sealable paper bag has inner lining sealed - while closure flap is folded back to expose layers to heat

Info

Publication number
DE3046036A1
DE3046036A1 DE19803046036 DE3046036A DE3046036A1 DE 3046036 A1 DE3046036 A1 DE 3046036A1 DE 19803046036 DE19803046036 DE 19803046036 DE 3046036 A DE3046036 A DE 3046036A DE 3046036 A1 DE3046036 A1 DE 3046036A1
Authority
DE
Germany
Prior art keywords
heat
closure flap
inner lining
paper bag
inner layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19803046036
Other languages
German (de)
Inventor
Gustav 7590 Achern Kuckhermann
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.)
Icoma Packtechnik GmbH
Original Assignee
Icoma Packtechnik GmbH
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 Icoma Packtechnik GmbH filed Critical Icoma Packtechnik GmbH
Priority to DE19803046036 priority Critical patent/DE3046036A1/en
Priority to DE8080107951T priority patent/DE3070186D1/en
Priority to EP80107951A priority patent/EP0031129B1/en
Priority to CA000367176A priority patent/CA1155096A/en
Priority to US06/218,238 priority patent/US4353770A/en
Publication of DE3046036A1 publication Critical patent/DE3046036A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1448—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface radiating the edges of the parts to be joined, e.g. for curing a layer of adhesive placed between two flat parts to be joined, e.g. for making CDs or DVDs
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1496—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of masks
    • 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
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B29K2711/123—Coated
    • 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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Bag Frames (AREA)

Abstract

A method of sealing (welding) the inner lining of a multi-layer paper bag having a staggered closure flap comprises the following. The closure flap (4) fixed to the rear side of the paper bag is folded back about a fold line (5) set back (i.e. further down) from the edge (6) of the inner lining (3). While it is in this folded-back state, heat is applied to the exposed inner layer (3) to seal the superimposed layers together. The fold line (5) may lie virtually coincident with the edge (6). Infrared thermal energy may be used for the sealing, regulated as a function of the speed of passage of the bag. This method ensures better penetration of heat to the various thickness of paper than was possible without the folding back of the flap. Thus prodn. rates can be increased.

Description

"Verfahren zum Verschweißen der Innenlagen von mehrlagigen Papiersäcke"Process for welding the inner layers of multi-layer paper sacks

Die Erfindung betrifft ein Verfahren zum Verschweißen nach Anspruch 1 der deutschen Patentanmeldung P 29 51 597.7-27.The invention relates to a method for welding according to claim 1 of the German patent application P 29 51 597.7-27.

Bei dem Verfahren gemäß Hauptpatent muß in jedem Fall eine Papierschicht von der zum Verschweißen der Innenlage erforderlichen Wärmeenergie durchsetzt werden. Es muß demzufolge eine größere Energiemenge zugeführt werden, als sie für den eigentlichen Verschweißvorgang erforderlich ist. Dies führt nicht nur zu einer Verlängerung der erforderlichen Einwirkungsdauer der Schweißvorrichtung auf den Papiersack, sondern auch zur Erhöhung des Energieverbrauchs. Beides ist nachteilig.In the process according to the main patent, a paper layer must in each case are penetrated by the thermal energy required to weld the inner layer. As a result, a greater amount of energy must be supplied than it is for the actual Welding process is required. This not only leads to an extension of the required duration of action of the welding device on the paper sack, but rather also to increase energy consumption. Both are disadvantageous.

DerErfindung liegt die Aufgabe zugrunde, die geschilderten Nachteile zu vermeiden und das Verfahren gemäß Hauptpatent so zu verbessern, daß kürzere Bearbeitungszeiten und niedrigerer Energieverbrauch erzielbar sind.The invention is based on the problem of the disadvantages outlined to avoid and to improve the process according to the main patent so that shorter processing times and lower energy consumption can be achieved.

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß dadurch, daß die zur Verschweißen der Innenlage benötigte Wärmeenergie zumindest 81 wesentlichen von vorn auf die Kanten der Innenlage aufgebracht wird.This object is achieved according to the invention in that the heat energy required to weld the inner layer is at least 81 essential is applied from the front to the edges of the inner layer.

Bei einer Wärmezufuhr im wesentlichen von vorn auf die Kante der Innenlage genügen kurze Schweißzeiten. Dies bedeutet eine hohe Verarbeitungsgeschwindigkeit für die mehrlagigen Papiersäcke.When heat is applied essentially from the front onto the edge of the inner layer Short welding times are sufficient. This means a high processing speed for the multilayer paper sacks.

Es hat sich ferner erfindungsgemäß als vorteilhaft erwiesen, daß die Falzlinie zumindest annähernd bündig liegt mit den Kanten der Innenlage. Bei einer derartigen Ausführungsform kann auf das Vorsehen von Seitenfalten-Einschnitten, die bis auf die Höhe der Falzlinie für die Klappe geführt werden, verzichtet werden. Derartige Einschnitte, wie sie bei dem Verfahren gemäß Hauptpatent nötig sind, entfallen. Hierdurch entstehen Herstellungsvorteile.It has also proven to be advantageous according to the invention that the The fold line is at least approximately flush with the edges of the inner layer. At a Such an embodiment can be based on the provision of gusset cuts, which are guided up to the height of the fold line for the flap can be dispensed with. Such incisions, as they are necessary in the method according to the main patent, are omitted. This results in manufacturing advantages.

Gemäß einem weiteren Merkmal der Erfindung werden die Innen lagen im Bereich der Kanten mittels Andrückorganen aufeinander gedrückt, während die zum Verschweißen benötigte Wärmeenergie über Infrarotstrahler zugeführt wird.According to a further feature of the invention, the inner layers are pressed against each other in the area of the edges by means of pressure elements, while the for Welding required thermal energy is supplied via infrared radiators.

Eine derartige Ausführungsform hat den Vorteil, daß die Wärmezufuhr auf denjenigen Bereich begrenzt wird, in dem die Wärme tatsächlich gebraucht wird, nämlich auf den Bereich der Stirnseite. Die Folien schrumpfen durch die Wärmeeinwirkung zusammen, aber nur bis maximal zu den Anpressorganen. Hierdurch wird eine besonders gute Verschweißung der zu verschweißenden öffnung sichergestellt. In der Praxis liegen die Anpressorgane bzw. die von diesen erzeugten Andruckorganen ca. 5 bis 10 mm hinter der Stirnkante der Innenlage zurück Auf dem freiliegenden Bereich vc 5 bis 10 mm erfolgt dann der Verschweißungs- und Schrumpfungsprozeß. Die auf diese Weise gebildete Schweißverbindung ist höher belastbar als eine Schweißverbindung, die mit Hilfe von beheizten Andrückorganen, Schweißbändern oder dergleichen erzeugt wird.Such an embodiment has the advantage that the heat supply limited to the area in which the heat is actually needed, namely on the area of the front side. The films shrink when exposed to heat together, but only up to the pressure organs. This makes one special good welding of the opening to be welded is ensured. In practice the pressure elements or the pressure elements generated by them lie approx. 5 to 10 mm behind the front edge of the inner layer. On the exposed area vc The welding and shrinking process then takes place 5 to 10 mm. The on this A welded connection formed in this way is more resilient than a welded connection, generated with the help of heated pressure elements, sweatbands or the like will.

Nachstehend wird die Erfindung anhand der Zeichnungen im einzelnen erläutert. Es zeigen: Figur 1: eine perspektivische Ansicht eines Keils eines Seitenfaltensacks mit Verschlußklappe, der mit dem erfindungsgemäßen Verfahren verarbeitet werden kann, Figur 2: eine schematische Seitenansicht auf das Ende eines dreilagigen Seitenfaltensacks, Figur 3: eine Draufsicht von oben auf den Seitenfaltensack, gemäß Figur 2, Figur 4: die schematische Ansicht des Seitenfaltensacks gemäß Figur 2 mit Verschweißeinrichtung, Figur 5: eine Draufsicht auf den Seitenfaltensack mit seitlich weggeklappter Verschlußklappe gemäß Figur 4.The invention is explained in detail below with reference to the drawings explained. They show: FIG. 1: a perspective view of a wedge of a gusseted sack with closure flap, which can be processed with the method according to the invention can, Figure 2: a schematic side view of the end of a three-layer gusseted sack, FIG. 3: a plan view from above of the gusseted sack according to FIG. 2, FIG 4: the schematic view of the gusseted sack according to FIG. 2 with a welding device, FIG. 5: a plan view of the gusseted sack with the closure flap folded away to the side according to Figure 4.

Der Seitenfaltensack besteht im dargestellten Ausführungsbeispiel aus ingesamt drei Lagen, nämlich aus.zwei äußeren Papierlagen 1' und 2' und einer Innenlage 3'. Die Innenlage 3' besteht aus Polyäthylen. Zur Verwendung des erfindungsgemäßen Verfahrens sind auch Säcke mit beliebig vielen Außen lagen aus Papier geeignet. Je größer die Anzahl der äußeren Lagen aus Papier wird, desto vorteilhafter ist die Anwendung des erfindungsgemäßen Verfahrens.The gusseted sack exists in the illustrated embodiment from a total of three layers, namely from two outer layers of paper 1 'and 2' and one Inner layer 3 '. The inner layer 3 'consists of polyethylene. To use the invention In the process, bags with any number of outer layers made of paper are also suitable. The greater the number of outer layers of paper, the more advantageous it is the application of the method according to the invention.

Das Wegklappen der Verschlußklappe 4' erfolgt entlang der Falzlinie 5'. Durch das Wegklappen der Verschlußklappe 4' entlang der Falzlinie 5' werden die Stirnkanten 6' der Innenlage 3 für die Wärmeeinwirkung besser zugänglich.The flap 4 'is folded away along the fold line 5 '. By folding away the flap 4 'along the fold line 5' the front edges 6 'of the inner layer 3 are more accessible to the action of heat.

Ein Infrarotstrahler, der aus Heizstab 11 und einem Reflektorspiegel 12 besteht, gibt seine Energie in Richtuna des Pfeils 13 an die Stirnkanten 6'der Innenlage 3'ab. Die Klappe 4' mit den beiden äußeren Papierschichten ist dabei gemäß Figur nach hinten geklappt. Ein Schutzschild 14 stellt sicher, daß die Schweißenergie gezielt auf die Stirnkanten 6' der Innenlage 3' gelangt Zwei Andrückorgane 15 und 16 werden gegeneinander gepreßt unS verhindern, daß die Schweißenergie sich über. einen größeren Bereich verteilen kann, als er hinter den Andrückorganen 15 und 16 in Richtung auf den Infrarotstrahler 11 vorsteht.An infrared heater consisting of heating rod 11 and a reflector mirror 12 exists, gives its energy in the direction of the arrow 13 to the front edges 6'der Inner layer 3 'from. The flap 4 'with the two outer paper layers is in accordance with Figure folded back. A protective shield 14 ensures that the Welding energy Two pressure elements 15 and 15 reach specifically at the end edges 6 'of the inner layer 3' 16 are pressed against each other and prevent the welding energy from spreading. can distribute a larger area than behind the pressing members 15 and 16 in the direction of the infrared heater 11 protrudes.

Bei ein m Verschweißen endet der Verschweißvorgang an den Andrückorganen 15 und 16.With one m welding, the welding process ends on the pressure elements 15 and 16.

Die Andrückorgane 15 und 16 sitzen ca. 5 bis 8 mm hinter den Stirnkanten 6' der Innenlage 3'.The pressing members 15 and 16 sit approx. 5 to 8 mm behind the front edges 6 'of the inner layer 3'.

Das geschilderte Prinzip ist auch anwendbar, wenn die Innenlage 3' als kunststoffkaschierte Papierlage ausgebildet ist, beispielsweise eine Polyäthylenkaschierung aufweist.The principle described can also be used if the inner layer 3 ' is designed as a plastic-laminated paper layer, for example a polyethylene lamination having.

Die Andrückorgane 15 und 16 können ggf. auch mehrteilig ausgebildet sein und mit Hilfe von Andruckfedern das Anpressen bewirken.The pressing members 15 and 16 can optionally also be constructed in several parts be and with the help of pressure springs cause the pressing.

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Claims (3)

Patentansp# #che: 1. Verfahren zum Verschweißen der Innenlagen eines mehrlagigen Papiersacks nach Hauptpatent 29 51 597, d a d u r c h g e -k e n n z e i c h n e t , daß die zum Verschweißen der Innenlage benötigte Wärmeenergie zumindest im wesentlichen von vorn auf die Stirnkanten (6') der Innenlage (3') aufgebracht wird.Patent claims: 1. Method for welding the inner layers of a multilayer paper sacks according to main patent 29 51 597, d a d u r c h g e -k e n n z e i c h n e t that the thermal energy required to weld the inner layer is at least applied essentially from the front onto the front edges (6 ') of the inner layer (3') will. 2. Verfahren nach Anspruch 1, d a d u r c h g e k e n n -z e i c h n e t , daß die Falzlinie (5') zumindest annähernd bündig liegt mit den Stirnkanten (6') der Innenlage (3').2. The method according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that the fold line (5 ') is at least approximately flush with the front edges (6 ') of the inner layer (3'). 3. Verfahren nach Anspruch 1 oder 2, d a d u r c h g e k e n n -z e i c h n e t , daß die Innenlagen (3') im Bereich der Stirnkanten (6') mittels Andrückorganen (15; 16) aufeinandergedrückt werden, während die zum Verschweißen benötigte Wärmeenergie über Infrarotstrahler zugeführt wird.3. The method according to claim 1 or 2, d a d u r c h g e k e n n -z e i c h n e t that the inner layers (3 ') in the area of the front edges (6') by means of Pressure members (15; 16) are pressed against one another, while the welding required thermal energy is supplied via infrared radiators.
DE19803046036 1979-12-21 1980-12-06 Multilayer sealable paper bag has inner lining sealed - while closure flap is folded back to expose layers to heat Withdrawn DE3046036A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE19803046036 DE3046036A1 (en) 1980-12-06 1980-12-06 Multilayer sealable paper bag has inner lining sealed - while closure flap is folded back to expose layers to heat
DE8080107951T DE3070186D1 (en) 1979-12-21 1980-12-17 Method of welding the internal layers of multi-layer paper sacks
EP80107951A EP0031129B1 (en) 1979-12-21 1980-12-17 Method of welding the internal layers of multi-layer paper sacks
CA000367176A CA1155096A (en) 1979-12-21 1980-12-19 Method for welding the inner layers of multi-layer paper sacks
US06/218,238 US4353770A (en) 1979-12-21 1980-12-19 Method for welding the inner layers of multi-layer paper sacks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803046036 DE3046036A1 (en) 1980-12-06 1980-12-06 Multilayer sealable paper bag has inner lining sealed - while closure flap is folded back to expose layers to heat

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DE3046036A1 true DE3046036A1 (en) 1982-07-15

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DE19803046036 Withdrawn DE3046036A1 (en) 1979-12-21 1980-12-06 Multilayer sealable paper bag has inner lining sealed - while closure flap is folded back to expose layers to heat

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178627A1 (en) * 1984-10-18 1986-04-23 Melitta-Werke Bentz & Sohn Method for producing filter paper articles
EP2464510B1 (en) * 2009-08-10 2017-10-25 Windmöller & Hölscher KG Method for producing a sack or a bag having plastic non-woven material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178627A1 (en) * 1984-10-18 1986-04-23 Melitta-Werke Bentz & Sohn Method for producing filter paper articles
US4718883A (en) * 1984-10-18 1988-01-12 Melitta-Werke Bentz & Sohn Process for manufacturing articles of filter paper
EP2464510B1 (en) * 2009-08-10 2017-10-25 Windmöller & Hölscher KG Method for producing a sack or a bag having plastic non-woven material

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