DE4427955B4 - Method for producing a filter bag - Google Patents

Method for producing a filter bag Download PDF

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Publication number
DE4427955B4
DE4427955B4 DE4427955A DE4427955A DE4427955B4 DE 4427955 B4 DE4427955 B4 DE 4427955B4 DE 4427955 A DE4427955 A DE 4427955A DE 4427955 A DE4427955 A DE 4427955A DE 4427955 B4 DE4427955 B4 DE 4427955B4
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Prior art keywords
filter material
filter
longitudinal edges
welded together
bonding agent
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Expired - Fee Related
Application number
DE4427955A
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German (de)
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DE4427955A1 (en
Inventor
Christoph Götz
Folker Richter
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.)
TEA GOETZ GMBH ACADEMY OF TEA, 30179 HANNOVER, DE
Original Assignee
Tea Goetz Academy Of Tea GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/808—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package for immersion in the liquid to release part or all of their contents, e.g. tea 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • 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
    • 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
    • B29C66/729—Textile or other fibrous material made from plastics
    • 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
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/0006—Multiple-step processes for making flat articles ; Making flat articles the articles being coffee filters
    • 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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/008—Attaching together sheets, strips or webs; Reinforcing edges by friction, e.g. obtained ultrasonic vibrations
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29K2711/126—Impregnated
    • 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
    • B29L2031/14—Filters
    • 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
    • B29L2031/7122—Tea bags
    • 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
    • B29L2031/7128—Bags, sacks, sachets

Abstract

Verfahren zur Herstellung einer Filtertüte aus luft- und flüssigkeitsdurchlässigem Filtermaterial, die zur Aufnahme einer Substanz zur Herstellung von Aufgußgetränken bestimmt ist, bei welchem von einem endlosen Band des Filtermaterials ein Abschnitt mit vorgegebener Länge abgetrennt wird und bei welchem der abgetrennte Abschnitt durch Zurückbiegen zu einem zweilagigen Gebilde gefaltet wird, dessen beide Längskanten miteinander verschweißt werden, dadurch gekennzeichnet,
– daß als Ausgangsmaterial ein unbeschichtetes, offenporiges Filtermaterial (2) verwendet wird,
– daß im Bereich der beiden Längskanten des Filtermaterials (2) jeweils ein schmaler Streifen (5, 6) eines Haftvermittlers aufgetragen wird und
– daß die beiden Lagen des Abschnitts (8) an den Streifen (5, 6), an denen der Haftvermittler aufgetragen ist, durch Ultraschall miteinander verschweißt werden.A method of making a filter bag of air and liquid pervious filter material intended to receive a substance for making infusion beverages, wherein a portion of predetermined length is severed from an endless belt of the filter material and wherein the severed portion is bent back into a two ply Folded structure whose two longitudinal edges are welded together, characterized
That an uncoated, open-pore filter material (2) is used as the starting material,
- That in each case a narrow strip (5, 6) of a bonding agent is applied in the region of the two longitudinal edges of the filter material (2) and
- That the two layers of the section (8) on the strip (5, 6) to which the bonding agent is applied, are welded together by ultrasound.

Figure 00000001
Figure 00000001

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung einer Filtertüte aus luft- und flüssigkeitsdurchlässigem Filtermaterial, die zur Aufnahme einer Substanz zur Herstellung von Aufgußgetränken bestimmt ist, bei welchem von einem endlosen Band des Filtermaterials ein Abschnitt mit vorgegebener Länge abgetrennt wird und bei welchem der abgetrennte Abschnitt durch Zurückbiegen zu einem zweilagigen Gebilde gefaltet wird, dessen beide Längskanten miteinander verschweißt werden ( EP 0 020 598 B1 ).The invention relates to a method for producing a filter bag made of air and liquid-permeable filter material, which is intended for receiving a substance for the preparation of infusion drinks, in which a section of predetermined length is separated from an endless belt of the filter material and in which the separated Section is folded by bending back to a two-ply structure whose two longitudinal edges are welded together ( EP 0 020 598 B1 ).

Filtertüten werden beispielsweise zur Herstellung von Tee verwendet. Auf diesen Anwendungsfall beziehen sich die weiteren Ausführungen, stellvertretend für andere Anwendungsfälle. Für die Zubereitung von Tee in unterschiedlichsten Geschmacksrichtungen sind beispielsweise fertig abgepackte Beutel erhältlich, in denen die entsprechende Tee-Substanz verschlossen ist. An den Beuteln ist ein Bindfaden angebracht, so daß sie in eine Teekanne oder in ein anderes Gefäß eingehängt und wieder aus derselben bzw. demselben entfernt werden können.Become filter bags used for example for the production of tea. On this application refer to the other versions, by way of representation for others Use cases. For the preparation of tea in different flavors are for example pre-packaged bags available, in which the corresponding tea substance is closed. To the A twine is attached to a teapot or bag hung in another vessel and can be removed from the same or the same again.

Es sind auch Filtertüten bekannt, die zur Zubereitung von Tee auf eine Spannvorrichtung mit weiter Öffnung aufgespannt werden, so daß die Tee-Substanz eingefüllt werden kann ( DE 28 57 169 C1 ). Sie werden mittels der als Halter dienenden Spannvorrichtung in eine Teekanne oder ein anderes Gefäß eingebracht und wieder aus derselben bzw. demselben entfernt.There are also filter bags known which are stretched to prepare tea on a jig with wide opening, so that the tea substance can be filled ( DE 28 57 169 C1 ). They are introduced by means of the clamping device serving as a holder in a teapot or other vessel and removed again from the same or the same.

Die aufzuspannenden Filtertüten bestehen ebenso wie die aus der eingangs erwähnten EP 0 020 598 B1 kannten Filtertüten aus ganzflächig beschichtetem Filtermaterial. Für die Beschichtung wird beispielsweise Polyethylen verwendet. Durch Aufbringen von Wärme und Druck können zwei Lagen dieses Filtermaterials miteinander verschweißt werden. Die Beschichtung des beispielweise aus Papier bestehenden Filtermaterials bedeutet einen Zusatzaufwand, und zwar sowohl bei der Herstellung des Filtermaterials als auch durch das zusätzliche Material selbst. Darüberhinaus sind eine Verschweißung mittels Wärme und Druck erlaubende Materialien nicht ohne weiteres recyclebar. Sie belasten daher die Umwelt.The aufzuspannenden filter bags consist as well as those of the aforementioned EP 0 020 598 B1 knew filter bags from full-surface coated filter material. For example, polyethylene is used for the coating. By applying heat and pressure, two layers of this filter material can be welded together. The coating of the existing example of paper filter material means an additional expense, both in the production of the filter material as well as by the additional material itself. In addition, a welding by means of heat and pressure-permitting materials are not readily recyclable. They therefore burden the environment.

Der Erfindung liegt die Aufgabe zugrunde, das eingangs geschilderte Verfahren zu vereinfachen und umweltfreundlicher zu gestalten.Of the Invention is based on the object described at the outset Simplify procedures and make them more environmentally friendly.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst,

  • – daß als Ausgangsmaterial ein unbeschichtetes, offenporiges Filtermaterial verwendet wird,
  • – daß im Bereich der beiden Längskanten des Filtermaterials jeweils ein schmaler Streifen eines Haftvermittlers aufgetragen wird und
  • – daß die beiden Lagen des Abschnitts an den Streifen, an denen der Haftvermittler aufgetragen ist, durch Ultraschall miteinander verschweißt werden.
This object is achieved according to the invention characterized
  • That the starting material used is an uncoated, open-pored filter material,
  • - That in each case a narrow strip of a bonding agent is applied in the region of the two longitudinal edges of the filter material and
  • - That the two layers of the section to the strip on which the bonding agent is applied, are welded together by ultrasound.

Bei diesem Verfahren wird für die Herstellung der Filtertüten das unbehandelte Grundmaterial ohne Beschichtung eingesetzt. Die Herstellung desselben ist daher vergleichsweise preiswert und es belastet als Abfall nicht die Umwelt. Für das Verschweißen des Filtermaterials wird so wenig zusätzliches Material wie möglich eingesetzt, da nur an den zu verschweißenden Stellen schmale Streifen eines Haftvermittlers aufgetragen werden. Als Haftvermittler kann außerdem ein die Umwelt ebenfalls nicht belastendes lebensmittelechtes Bindemittel, beispielweise ein handelsüblicher Lack, verwendet werden. Schließlich ist der Aufwand an Energie beim Verschweißen des Filtermaterials relativ niedrig, da statt beheizter Schweißkanten eine Ultraschallanlage eingesetzt wird. Das Filtermaterial wird bei der Ultraschall-Verschweißung außerdem so gering erwärmt, daß ein Verbrennen ausgeschlossen werden kann.at This method is for the production of the filter bags the untreated base material used without coating. The Making the same is therefore comparatively inexpensive and it does not pollute the environment as waste. For welding the Filter material is used as little additional material as possible, because only to be welded Make narrow strips of a primer to be applied. As a bonding agent can also a food-safe binder that also does not pollute the environment for example, a commercial Lacquer, used. After all is the amount of energy when welding the filter material relative low, because instead of heated welding edges an ultrasonic system is used. The filter material will also do so during ultrasonic welding slightly warmed, that a burning can be excluded.

Das Verfahren nach der Erfindung wird anhand der Zeichnungen als Ausführungsbeispiel erläutert.The Method according to the invention will be described with reference to the drawings as an embodiment explained.

Es zeigen:It demonstrate:

1 eine Vorrichtung zur Durchführung des Verfahrens nach der Erfindung in schematischer Darstellung. 1 a device for carrying out the method according to the invention in a schematic representation.

2 einen Abschnitt aus Filtermaterial vor Fertigstellung einer Filtertüte. 2 a section of filter material before finishing a filter bag.

3 bis 6 unterschiedliche Ansichten von Filtertüten. 3 to 6 different views of filter bags.

Auf einer Rolle 1 ist eine große Länge von bandförmigem, offenporigem Filtermaterial 2 aufgewickelt. Das Filtermaterial 2 ist beispielweise offenporiges Papier. Es wird in Richtung des Pfeiles 3 von der sich drehenden Rolle 1 abgezogen und durch eine Vorrichtung 4 geführt, in der im Bereich beider Längskanten ein schmaler Streifen 5 bzw. 6 eines Haftvermittlers aufgetragen wird. Die Streifen 5 und 6 sind in 2 gestrichelt eingezeichnet. Als Haftvermittler wird vorzugsweise ein lebensmittelechtes Bindemittel verwendet, das beispielweise als Lack im Handel erhältlich ist.On a roll 1 is a large length of band-shaped, open-pored filter material 2 wound. The filter material 2 is for example open-pored paper. It will be in the direction of the arrow 3 from the spinning roll 1 withdrawn and through a device 4 led, in the region of both longitudinal edges a narrow strip 5 respectively. 6 a bonding agent is applied. The Stripes 5 and 6 are in 2 dashed lines. As a primer, a food-safe binder is preferably used, for example, as a lacquer in Trade is available.

In einer in Abzugsrichtung des Filtermaterials 2 folgenden Schneidvorrichtung 7 werden von dem quasi endlosen Band des Filtermaterials 2 Abschnitte 8 abgetrennt, aus denen jeweils eine Filtertüte durch Falten hergestellt wird. Dazu wird das eine Ende des Abschnitts 8 bis zur Anlage am verbleibenden Teil desselben zweilagig so zurückgebogen, daß die Streifen 5 bzw. 6 des Haftvermittlers aufeinander zu liegen kommen. Das Filtermaterial wird dann an den Streifen 5 und 6 mittels einer Ultraschallanlage 9 verschweißt.In a direction of withdrawal of the filter material 2 following cutting device 7 become from the quasi endless band of the filter material 2 sections 8th separated from each of which a filter bag is made by folding. This will be one end of the section 8th until it rests on the remaining part of the same two-ply bent back so that the strips 5 respectively. 6 of the bonding agent come to rest on each other. The filter material is then attached to the strip 5 and 6 by means of an ultrasonic system 9 welded.

Dabei können Filtertüten 10 entsprechend 3 und 4 hergestellt werden, die eine einseitig überstehende Lasche 11 haben. Sie dient zum vereinfachten Einfüllen der Tee-Substanz. Eine solche Filtertüte 10 kann bei entsprechender Länge ohne besonderen Halter in eine Teekanne eingesetzt werden.It can filter bags 10 corresponding 3 and 4 be produced, which has a one-sided protruding tab 11 to have. It is used for simplified filling of the tea substance. Such a filter bag 10 can be used with appropriate length without special holder in a teapot.

Es können auch Filtertüten 12 hergestellt werden, die entsprechend 5 und 6 eine Öffnung an einer Stirnseite haben. Diese Filtertüten 12 können auf eine Spannvorrichtung aufgesteckt werden.It can also filter bags 12 be prepared accordingly 5 and 6 have an opening on one end face. These filter bags 12 can be attached to a clamping device.

Die Streifen 5 und 6 des Haftvermittlers können – wie beschrieben – kontinuierlich auf das Filtermaterial 2 aufgetragen werden. Bei entsprechend präziser Fertigung ist es aber auch möglich, den Haftvermittler zur Erzeugung von Filtertüten 10 (3 und 4) nur an den zu verschweißenden Stellen aufzutragen. In allen Fällen ist es grundsätzlich auch möglich, den Haftvermittler erst auf die abgetrennten Abschnitte 8 aufzutragen.The Stripes 5 and 6 of the primer can - as described - continuously on the filter material 2 be applied. With correspondingly precise production, it is also possible for the adhesion promoter to produce filter bags 10 ( 3 and 4 ) apply only to the parts to be welded. In all cases, it is also possible in principle, the primer only on the separated sections 8th apply.

Claims (3)

Verfahren zur Herstellung einer Filtertüte aus luft- und flüssigkeitsdurchlässigem Filtermaterial, die zur Aufnahme einer Substanz zur Herstellung von Aufgußgetränken bestimmt ist, bei welchem von einem endlosen Band des Filtermaterials ein Abschnitt mit vorgegebener Länge abgetrennt wird und bei welchem der abgetrennte Abschnitt durch Zurückbiegen zu einem zweilagigen Gebilde gefaltet wird, dessen beide Längskanten miteinander verschweißt werden, dadurch gekennzeichnet, – daß als Ausgangsmaterial ein unbeschichtetes, offenporiges Filtermaterial (2) verwendet wird, – daß im Bereich der beiden Längskanten des Filtermaterials (2) jeweils ein schmaler Streifen (5, 6) eines Haftvermittlers aufgetragen wird und – daß die beiden Lagen des Abschnitts (8) an den Streifen (5, 6), an denen der Haftvermittler aufgetragen ist, durch Ultraschall miteinander verschweißt werden.A method of making a filter bag of air and liquid pervious filter material intended to receive a substance for making infusion beverages, wherein a portion of predetermined length is severed from an endless belt of the filter material and wherein the severed portion is bent back into a two ply Folded, whose two longitudinal edges are welded together, characterized in that - as starting material an uncoated, open-pored filter material ( 2 ) is used, - that in the region of the two longitudinal edges of the filter material ( 2 ) each a narrow strip ( 5 . 6 ) of a bonding agent is applied and - that the two layers of the section ( 8th ) on the strip ( 5 . 6 ), to which the adhesion promoter is applied, are welded together by ultrasound. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Filtermaterial (2) offenporiges Papier verwendet wird.Process according to Claim 1, characterized in that the filter material ( 2 ) open-pore paper is used. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Haftvermittler ein lebensmittelechter Lack verwendet wird.Method according to claim 1 or 2, characterized that as Primer a food-safe paint is used.
DE4427955A 1994-08-06 1994-08-06 Method for producing a filter bag Expired - Fee Related DE4427955B4 (en)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20000664A1 (en) * 2000-11-17 2002-05-17 Tecnea Engineering S R L PROCEDURE FOR SEALING AT LEAST TWO FLAPS OF TWO FLAT BODIES
ITBO20070408A1 (en) 2007-06-11 2008-12-12 I M A Ind Macchine Automatic H MONOLOBE BAG FOR INFUSION PRODUCTS.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2857169C1 (en) * 1977-11-14 1983-01-13 Teafilter Gmbh, 5450 Neuwied Holder made of elastic material, in particular plastic, for holding a filter bag designed as a flat bag for the preparation of tea and similar beverages
EP0020598B1 (en) * 1978-11-16 1983-08-03 VANGEDAL-NIELSEN, Erling Disposable filter bag and a method of making extraction beverages
DE4141969A1 (en) * 1991-12-19 1993-06-24 Knecht Filterwerke Gmbh RING FILTER ELEMENT MADE OF A ZIGZAG FOLDED FILTER RAIL MATERIAL
DE4227744A1 (en) * 1992-08-21 1994-02-24 Knecht Filterwerke Gmbh Zigzag folded filter strip material - has folds stabilised at least on one side by linearly-formed fixation means running in fold direction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2857169C1 (en) * 1977-11-14 1983-01-13 Teafilter Gmbh, 5450 Neuwied Holder made of elastic material, in particular plastic, for holding a filter bag designed as a flat bag for the preparation of tea and similar beverages
EP0020598B1 (en) * 1978-11-16 1983-08-03 VANGEDAL-NIELSEN, Erling Disposable filter bag and a method of making extraction beverages
DE4141969A1 (en) * 1991-12-19 1993-06-24 Knecht Filterwerke Gmbh RING FILTER ELEMENT MADE OF A ZIGZAG FOLDED FILTER RAIL MATERIAL
DE4227744A1 (en) * 1992-08-21 1994-02-24 Knecht Filterwerke Gmbh Zigzag folded filter strip material - has folds stabilised at least on one side by linearly-formed fixation means running in fold direction

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