EP1677660A1 - Filter bag and method for the production thereof - Google Patents

Filter bag and method for the production thereof

Info

Publication number
EP1677660A1
EP1677660A1 EP04817144A EP04817144A EP1677660A1 EP 1677660 A1 EP1677660 A1 EP 1677660A1 EP 04817144 A EP04817144 A EP 04817144A EP 04817144 A EP04817144 A EP 04817144A EP 1677660 A1 EP1677660 A1 EP 1677660A1
Authority
EP
European Patent Office
Prior art keywords
bag
filter bag
holding plate
filter
closed
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.)
Granted
Application number
EP04817144A
Other languages
German (de)
French (fr)
Other versions
EP1677660B1 (en
Inventor
Jan Eurofilters N.V. SCHULTINK
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.)
Eurofilters NV
Original Assignee
Eurofilters NV
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 Eurofilters NV filed Critical Eurofilters NV
Publication of EP1677660A1 publication Critical patent/EP1677660A1/en
Application granted granted Critical
Publication of EP1677660B1 publication Critical patent/EP1677660B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/14—Bags or the like; Rigid filtering receptacles; Attachment of, or closures for, bags or receptacles
    • 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
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • 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
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • 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
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B31B2150/0016—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom made from already formed bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2241/00—Making bags or boxes intended for a specific use
    • B31B2241/008—Making suction cleaner bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/02—Vacuum cleaner bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1067—Continuous longitudinal slitting
    • Y10T156/1069—Bonding face to face of laminae cut from single sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1075—Prior to assembly of plural laminae from single stock and assembling to each other or to additional lamina
    • Y10T156/1079—Joining of cut laminae end-to-end
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1739—Webs of different width, longitudinally aligned

Definitions

  • the invention relates to a filter bag for a vacuum cleaner with a hose-like bag and a closed free end area and an opposite, at least partially closed area and a holding plate, the partially closed area being folded to form a bottom.
  • Filter bags for vacuum cleaners which have a tubular bag and which, in addition to a closed free end region, have a folded bottom, a so-called block bottom, are known in the prior art. Dust bags of this type are usually produced from a paper material which can be processed on conventional tubular bag systems. In the case of such filter bags, a corresponding holding plate is generally attached to the block bottom, which has an opening through which it closes cleaning air is led. The task of the block bottom is to stabilize the filter bag and form a three-dimensional bag. The block bottom also makes it easier to install the bag in the vacuum cleaner.
  • WO 01/03802 AI describes a special non-woven material made of several layers of filter material that are independent of one another. These independent bearings are combined into a filter material with special properties.
  • vacuum cleaner bags which are produced with such a nonwoven material are clearly superior to the previously known ones with regard to the performance of the vacuum cleaner.
  • DE 100 64 608 AI describes a solution of how a holding plate can be attached to such a bag. After that, a hose-like arrangement of the vacuum cleaner bag is first carried out with the formation of a longitudinal edge fold. This hose-like arrangement is then separated, so that a second end region is created. The opposite free ends of a hose-like arrangement of this type are closed and, after a corresponding opening has been formed, a holding plate is assigned to an end region.
  • a special fold is subsequently provided in the area of the vacuum cleaner bag between the area provided with the holding plate and the free end. accepted. The special configuration of transverse folds is intended to stabilize the slack bag.
  • EP 1 059 056 AI describes a further solution as to how a holding plate for a bag can be introduced into the filter material.
  • two independent layers of the filter material are brought together and welded in the edge areas.
  • the welded material is then separated and the two open transverse sides are welded.
  • a corresponding hole is punched into the layers one above the other and a reinforcement is placed around the two layers.
  • a filter bag made of a nonwoven material which has at least one end region which is comparable in its design with that of a block bottom made of paper material.
  • Another object of the invention is to provide a method for producing such a filter bag.
  • the vacuum cleaner bag which consists of a nonwoven material, has an at least partially closed end with respect to the free closed end, the latter being folded to form a base.
  • the folding according to the present invention is carried out in such a way that layers of the bag material lying one above the other are present in the bottom at least in regions and are at least partially connected to one another. With this configuration, a block bottom-like stabilization of the vacuum cleaner bag is achieved.
  • the decisive advantage of the solution according to the invention is to be seen in the fact that the central weld seam and the at least partial connection of the layers folded over one another stabilize them of the floor is reached, which is sufficient to provide a vacuum cleaner bag, which can be provided at any point with a holding plate and which can therefore be easily installed in a vacuum cleaner, even from a flexible material.
  • the holding plate can be freely selected with regard to its design.
  • the central weld seam is made over the entire width of the bottom. This increases the stability of the bottom formed by the folding.
  • the layers lying one above the other, which have been formed by the folding, are preferably connected by welding or gluing. This gluing or welding can be linear. This enables directional reinforcement of the floor.
  • the longitudinal sides that is to say those surfaces of the vacuum cleaner bag, are used to introduce the breaks between the closed free end and the at least partially closed end with the base designed according to the invention into the side surfaces thereby clamped, so that folding is possible.
  • the fractions can be designed so that they extend, for example, from the respective corners of the floor, if the floor is square, for example square, and are guided to the opposite free end. It is also advantageous if, starting from the central weld seam, a further pre-break is introduced into the bag material. This facilitates the insertion of gussets and increases the surface of the vacuum cleaner bag.
  • the pre-breaks introduced into the long sides of the vacuum cleaner bag can serve to further stabilize the bag material.
  • a pre-break in the sense of the invention is understood to mean material densifications that are preferably linear.
  • the pre-cracks can be introduced by means of a suitable molding tool and / or by welding.
  • the filter bag according to the invention also has a pre-break that is parallel to the central weld. This is used to fold the base towards the long side of the filter bag. It is therefore sufficient if there is such a break.
  • the distance of the pre-break is chosen so that it corresponds to the width of the bottom, starting from the central weld.
  • the bottom is angular, particularly preferably rectangular.
  • the fractions are made from the respective short sides of the rectangle to the free, closed end. Another break is from the central weld to the free end.
  • the holding plate it is possible according to the present invention either to connect it to the block bottom, as is known from paper filter bags, or to attach the holding plate to the free side surfaces of the vacuum cleaner bag.
  • the holding plate is attached to the bottom of the bag, at least partially covering it. Due to the fact that, according to the present invention, the bag is stabilized by the formation of the bottom, the holding plate can also be attached to the inside of the bag. This can be achieved, for example, by simultaneously inserting and connecting the holding plate with the stamp provided for the bottom formation.
  • one-piece holding plates can be used as such by the stabilization of the soil. These can also be provided with a locking mechanism.
  • the holding plate is constructed as is known per se from the prior art and has at least one through opening which serves to supply the air to be cleaned.
  • the holding plate can also be an element, for. B. a slide or a
  • the holding plate can be connected to the bottom of the bag using all of the common techniques of the prior art. For this come e.g. sticking or welding in question.
  • the holding plate it is also possible for the holding plate to be arranged on the side surfaces of the vacuum cleaner bag.
  • the holding plate it is preferred if the holding plate is attached in the vicinity of the floor, since it is through the floor freely spanned interior in the bag for the insertion of a filler neck and an advantageous air duct can be used.
  • the holding plates can, as is known per se from the prior art, consist of plastic or cardboard.
  • the bag material is preferably to be formed from a multi-layer nonwoven material, as is e.g. is described in WO 01/03802 AI. Reference is therefore expressly made to the disclosure content of this document.
  • the invention also includes all other nonwoven materials previously used in the
  • the invention further relates to a method for producing a filter bag as described above.
  • a tube-like bag with the at least partially closed end region is produced in a first method step.
  • This tube-like bag with the at least partially closed end region can be produced in cycles.
  • the tubular bag is made by the formation of the tubular material by connecting z. B. the two edges of a layer of the bag material and then a closing of the open area formed thereby is carried out.
  • edges of the layers can be connected and the open end closed in cycles. As well continuous joining of the edges of the layers is possible.
  • connection of the open end and the closing of the free end of the previously produced filter bag takes place simultaneously.
  • the bags can also be separated.
  • connection both when forming the hose and when connecting the open end, can be carried out by ultrasonic welding. Thermal welding is also possible.
  • the welding is preferably carried out in such a way that the weld seam is guided over the two tracks lying one above the other.
  • the formation of the pre-breaks is carried out during step a).
  • the pre-cracks are thus introduced into the filter bag by means of suitable shaping tools or also by means of additional weld seams.
  • the invention also includes those embodiments in which the introduction of the pre-creases is carried out in a method step before or after method step a).
  • the variant described above is preferred, in which the pre-breaks are introduced during process step a).
  • the soil is formed in accordance with the ing invention in that a stamp is inserted from the open side into the bag produced according to process step a). This automatically folds in the area of the floor at the closed end. In order to stabilize the base formed thereby, it is then essential that the layers lying one above the other formed by the folding are at least partially connected. This is preferably carried out in such a way that the layers lying one above the other are glued or welded. This results in additional stabilization of the soil. All methods known from the prior art can be used in the methods for connecting the superimposed layers. Gluing or welding should be mentioned here. Clamping of the individual layers can also be carried out. If the layers are connected by means of welding or gluing, it is further preferred if this is done in a linear manner.
  • the stamp provided for the bottom formation is used as A boss.
  • the anvil can also serve as a sound reflector for a sootrode during ultrasonic welding.
  • the anvil can also serve as a support element for the formation of pre-cracks. Furthermore, it can also be used as a support element when punching the filling opening. A reverse procedure is also possible.
  • the stamp can also be used as a sonotrode.
  • the method according to the invention thus folds the base, which stabilizes the limp material in the base area leads.
  • the method according to the invention also opens up the possibility of arranging the holding plate lying inside on the floor.
  • the holding plate is inserted with the stamp in one operation and welded / glued to the bag material. According to the present method, it is still necessary for a corresponding opening to be made in the bag at the points at which the holding plate is attached. If the holding plate is arranged directly on the floor, a corresponding opening is made in the floor area.
  • This opening can be introduced either in the web which has not yet been formed into a tube or during process step a).
  • the filling opening can also be introduced in process step b) or already in the web which has not yet been formed into a tube, ie before process step a).
  • Figure 1 shows a filter bag according to the invention in the semi-finished state in one-sided open form.
  • Figure 2 shows a filter bag according to the invention with a rectangular bottom.
  • FIG. 1 shows the filter bag 1 according to the invention schematically in the state as it results after the tubular bag has been formed and the free end area has been closed (method step a)).
  • the filter bag 1 consists of a composite nonwoven material, as described in WO 01/03802 AI.
  • the filter bag has breaks 3, 4 and 5 which lead to the formation of folds shown.
  • the term pre-break is understood to mean material compaction. This can e.g. B. done by pressure or pressure and temperature.
  • the folds 3, 4 and 5 create a folded, tubular filter bag, which is closed at its closed end 2 by a weld 6.
  • the central weld seam 6 has been introduced by thermal welding.
  • the welding was carried out in such a way that the two layers of filter material lying one above the other were connected to one another by the welding. 1 additionally has a pre-break 7. This is used to fold the floor.
  • FIG. 2 shows the filter bag 1 in a preferred embodiment.
  • the filter bag 1 according to FIG. 2 has a rectangular bottom 9 with two short transverse sides 10 and two long sides 11.
  • the fractions are designated 3, 4 and 5 analogously to FIG. Due to these fractions 3, 4 and 5, the Contour of the filter bag 1 determined.
  • the folding in the filter bag according to the invention is now essential, ie the design of the bottom 9.
  • the bottom 9 now has a folding on its short transverse sides 10.
  • the fold is created by superimposing the filter material, as has been shown in FIG. 1.
  • the geometry of the folding is determined by the fractions 3, 4 and 5.
  • a triangular gusset is thus covered under the spanned bottom 9.
  • the triangular gusset 8 formed is shown in FIG. 2 by dashed lines.
  • the outer edge-side leg 12 of the triangle is connected to the transverse side 10 of the base 9.
  • the transverse side 10 of the base 9 is glued to the leg 12.
  • any other embodiment is included, in which other connection technologies known from the prior art are applied. Such a thing
  • a pre-break 7 This serves to fold over the bottom in the direction of the longitudinal side of the bag 1.
  • the distance of the pre-break 7 from the central weld 6 therefore corresponds to the width of the bottom 9, so that a complete folding over of the bottom 9 is possible.
  • the filter bag 1 is also closed at its free end 13 by a further weld 15.
  • the bottom 9 is stabilized by the folding described above and the connection of the layers and the central weld 6.
  • the base 9 has sufficient stability even without an additional holding plate.
  • the bottom also has a through opening 16. This through opening 16 can then be provided with a holding plate (not shown), so that the filter bag can then be hung in a corresponding holder in the vacuum cleaner.
  • FIG. 3 now shows a further possibility of how the bottom 9 can be folded.
  • a gusset 19 and 20 is formed which, as can be seen from the figure, can be folded over in two different directions. This makes it possible to fold the gusset down onto the side surfaces of the filter bag 1 and glue it there (arrow direction a), or else the gusset can be folded back onto the remaining part of the base 9 and glued there as well. Stabilization of the soil 9 is again achieved by this embodiment.
  • the filter bag according to FIG. 3 also has protrusions 3, 4 with which the contour of the filter bag is determined.
  • FIGS. 4a to 4c now shows the sequence of the manufacturing method according to the invention with reference to FIGS. 4a to 4c.
  • FIG. 4a schematically shows how a layer of the filter material is folded up and connected at its edges 22 and 23.
  • the contour of the corresponding filter bag is defined using a shaping tool, not shown.
  • the process of the filter bag is also introduced into the filter bag material in the first process step, ie when the hose is formed, the corresponding breakouts 3, 4 and 5.
  • the filter material is preferably connected at the edges 22 and 23 in cycles, ie the welding is carried out at the position shown by the designation “Stop” in FIG. 4a point marked with "Stop 2" continued. At this point, the bag is closed. This is preferably carried out by ultrasonic welding. As FIG.
  • the method according to the invention preferably works in such a way that when the hose is closed and the central weld seam 6 is formed, the filter bag previously produced in the work step is closed at its opposite free end 13. According to the present method, the filter bag is thus closed and separated in one operation.
  • FIG. 4b shows the method step of the method according to the invention in which the folding of the bottom is carried out.
  • the bottom is then folded after the filter bag has been sealed with the weld 6 at its end 2. This is shown in Fig. 4a.
  • a stamp 24 is now inserted into the filter bag from the still open side and guided against the closed end 2.
  • the folding of the base 9 according to the invention is now achieved by specifying the contours 3, 4 and 5. This folding is done while the stamp is in its lower position is stabilized (FIG. 4b) by connecting the layers now lying one above the other.
  • the finished filter bag is now produced as shown in FIG. 4c by separating this bag from the filter bag lying in front of it, as described above.
  • Insert filter bag The opening is preferably introduced into the filter bag material during process step a) or b).
  • the holding plate it is also necessary to attach the holding plate.
  • the attachment of the holding plate can, for. B. take place simultaneously with the formation of the bottom or the holding plate is retrofitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Filtering Materials (AREA)
  • Making Paper Articles (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Packages (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Mushroom Cultivation (AREA)

Abstract

Described is a filter bag for a vacuum cleaner which may include a tubular bag with a closed free end area and an opposed, at least partially closed area as well as with a retaining plate. The bag is made from a bag material having at least one non-woven layer, and the at least partially closed area is folded forming a bottomPlies of the bag material which lie the one above the other are formed in areas, and is at least partially closed by a weld seam extending centrally in the bottom, the plies of the bag material which lie the one above the other being at least partially connected to one another.

Description

Filterbeutel und Verfahren zu dessen HerstellungFilter bags and process for their manufacture
Die Erfindung betrifft einen Filterbeutel für einen Staubsauger mit einem schlauchartigen Beutel sowie einen verschlossenen freien Endbereich und einen gegenüberliegenden, mindestens teilweise verschlossenen Bereich sowie eine Halteplatte, wobei der teilweise verschlossene Bereich einen Boden bildend gefaltet ist .The invention relates to a filter bag for a vacuum cleaner with a hose-like bag and a closed free end area and an opposite, at least partially closed area and a holding plate, the partially closed area being folded to form a bottom.
Filterbeutel für Staubsauger, die einen schlauchartigen Beutel aufweisen und die neben einem geschlossenen freien Endbereich einen gefalteten Boden, einen sog. Klotzboden, aufweisen, sind im Stand der Technik bekannt. Üblicherweise werden derartige Staubbeutel aus einem Papierwerkstoff, welcher auf üblichen Schlauchbeutelanlagen verarbeitet werden kann, gefertigt. Bei derartigen Filterbeuteln ist im Regelfall am Klotzboden eine entsprechende Halteplatte ange- bracht, die eine Öffnung aufweist, durch die die zu reinigende Luft geführt wird. Die Aufgabe des Klotzbodens besteht darin, den Filterbeutel zu stabilisieren und einen dreidimensionalen Beutel zu bilden. Der Klotzboden erleichtert zudem den Einbau des Beutels in den Staubsauger.Filter bags for vacuum cleaners which have a tubular bag and which, in addition to a closed free end region, have a folded bottom, a so-called block bottom, are known in the prior art. Dust bags of this type are usually produced from a paper material which can be processed on conventional tubular bag systems. In the case of such filter bags, a corresponding holding plate is generally attached to the block bottom, which has an opening through which it closes cleaning air is led. The task of the block bottom is to stabilize the filter bag and form a three-dimensional bag. The block bottom also makes it easier to install the bag in the vacuum cleaner.
In jüngster Zeit sind nun aber in Bezug auf die Staubsaugerbeutelmaterialien neue Entwicklungen bekannt geworden. So beschreibt die WO 01/03802 AI ein spezielles Vliesmaterial aus mehreren voneinander unabhängigen Lagen aus Filtermaterial. Diese unabhängigen Lager werden zu einem Filtermaterial mit speziellen Eigenschaften verbunden. In der Praxis hat es sich gezeigt, dass Staubsaugerbeutel, die mit einem derartigen Vliesmaterial hergestellt werden, in Bezug auf die Leistungsfähigkeit des Staubsaugers gegenüber den bisher bekannten deutlich überlegen sind.Recently, however, new developments in the field of vacuum cleaner bag materials have become known. For example, WO 01/03802 AI describes a special non-woven material made of several layers of filter material that are independent of one another. These independent bearings are combined into a filter material with special properties. In practice, it has been shown that vacuum cleaner bags which are produced with such a nonwoven material are clearly superior to the previously known ones with regard to the performance of the vacuum cleaner.
Aufgrund des hierbei biegeschlaffen Beutelmaterials ist allerdings die Bildung eines Klotzbodens nur schwer bzw. mit großem Aufwand möglich.However, due to the slack bag material, the formation of a block bottom is difficult or requires great effort.
Die DE 100 64 608 AI beschreibt eine Lösung wie eine Halteplatte an einem derartigen Beutel befestigt wer- den kann. Danach wird zuerst eine schlauchartige Anordnung des Staubsaugerbeutels unter Ausbildung einer Längsrandfaltung vorgenommen. Diese schlauchartige Anordnung wird dann abgetrennt, so dass ein zweiter Endbereich entsteht. Die gegenüberliegenden freien Enden einer derartigen schlauchartigen Anordnung werden verschlossen und eine Halteplatte wird, nach Ausformung einer entsprechenden Öffnung, einem Endbereich zugeordnet. Gemäß der Lehre der DE 100 64 608 AI wird nachfolgend eine spezielle Faltung im Bereich des Staubsaugerbeutels zwischen dem mit der Halteplatte versehenen Bereich und dem freien Ende vorge- nommen. Durch die spezielle Ausbildung von Querfalten soll eine Stabilisierung des biegeschlaffen Beutels erreicht werden.DE 100 64 608 AI describes a solution of how a holding plate can be attached to such a bag. After that, a hose-like arrangement of the vacuum cleaner bag is first carried out with the formation of a longitudinal edge fold. This hose-like arrangement is then separated, so that a second end region is created. The opposite free ends of a hose-like arrangement of this type are closed and, after a corresponding opening has been formed, a holding plate is assigned to an end region. According to the teaching of DE 100 64 608 AI, a special fold is subsequently provided in the area of the vacuum cleaner bag between the area provided with the holding plate and the free end. accepted. The special configuration of transverse folds is intended to stabilize the slack bag.
Das in der DE 100 64 608 AI beschriebene Verfahren ist jedoch sehr aufwendig.However, the process described in DE 100 64 608 AI is very complex.
In der EP 1 059 056 AI ist eine weitere Lösung beschrieben wie eine Haltplatte für einen Beutel in das Filtermaterial eingebracht werden kann. Nach der Lösung der EP 1059 056 AI werden zwei unabhängige Lagen des Filtermaterials aufeinander geführt und in den Randbereichen verschweißt. Nachfolgend wird das zusammengeschweißte Material abgetrennt und die beiden offenen Querseiten verschweißt. Zur Einbringung einer Halteplatte wird ein entsprechendes Loch in die übereinander liegenden Lagen eingestanzt und eine Verstärkung um die beiden Lagen gelegt.EP 1 059 056 AI describes a further solution as to how a holding plate for a bag can be introduced into the filter material. After the solution of EP 1059 056 AI two independent layers of the filter material are brought together and welded in the edge areas. The welded material is then separated and the two open transverse sides are welded. To insert a holding plate, a corresponding hole is punched into the layers one above the other and a reinforcement is placed around the two layers.
Nachteilig bei dieser Lösung ist, dass hier kein Boden gebildet wird der den Beutel an und für sich stabilisiert, sondern dass immer zwangsläufig eine Verstärkung, d. h. eine Halteplatte angebracht sein muss. Die Halteplatte, die gemäß der vorstehend er- wähnten europäischen Anmeldung angebracht wird, muss zudem immer faltbar sein, da sie um die beiden aufeinander gelegten Lagen gelegt wird. Dadurch unterliegt dieser Beutel in Bezug auf die Anwendung im Staubsaugerbereich großen Einschränkungen, da regel- mäßig die Halteplatte mehrere Funktionen erfüllen muss. Bei den Halteplatten ist es nämlich bisher üblich, zusätzlich noch Schieber oder Klappen anzubringen mit denen man die Öffnung zur hygienischen Entnahme des Staubsaugerbeutels verschließen kann. Dies ist bei einer faltbaren Ausführung der Halteplatte nicht möglich. Es ist auch nicht möglich, die Halte- platte z. B. auf den Längsseiten des Beutels anzubringen, da kein den Beutel stabilisierender Boden vorhanden ist.The disadvantage of this solution is that no bottom is formed here that stabilizes the bag in and of itself, but that a reinforcement, ie a holding plate, must always be attached. The holding plate, which is attached in accordance with the European application mentioned above, must also always be foldable, since it is placed around the two layers placed one on top of the other. As a result, this bag is subject to great restrictions with regard to use in the vacuum cleaner area, since the holding plate must regularly perform several functions. In the case of the holding plates, it has hitherto been customary to additionally attach slides or flaps with which the opening for the hygienic removal of the vacuum cleaner bag can be closed. This is not possible with a foldable version of the holding plate. It is also not possible to plate z. B. to install on the long sides of the bag, since there is no bottom stabilizing the bag.
Ausgehend hiervon ist es die Aufgabe der vorliegenden Erfindung, einen Filterbeutel aus einem Vliesmaterial anzugeben, der mindestens einen Endbereich aufweist, der in seiner Ausbildung mit dem eines Klotzboden, gefertigt aus Papierwerkstoff, vergleichbar ist. Eine weitere Aufgabe der Erfindung ist es, ein Verfahren zur Herstellung eines derartigen Filterbeutels anzugeben.Proceeding from this, it is the object of the present invention to provide a filter bag made of a nonwoven material which has at least one end region which is comparable in its design with that of a block bottom made of paper material. Another object of the invention is to provide a method for producing such a filter bag.
Die Aufgabe wird in Bezug auf den Beutel durch die kennzeichnenden Merkmale des Patentanspruchs 1 und in Bezug auf das Verfahren durch die Merkmale des Anspruchs 20 gelöst. Die Unteransprüche zeigen vorteilhafte Weiterbildungen auf.The object is achieved in relation to the bag by the characterizing features of claim 1 and in relation to the method by the features of claim 20. The subclaims show advantageous developments.
Erfindungsgemäß wird somit vorgeschlagen, dass der Staubsaugerbeutel, der aus einem Vliesmaterial besteht, ein gegenüber dem freien verschlossenen Ende ein mindestens teilweise verschlossenes Ende aufweist, wobei dieses einen Boden bildend gefaltet ist. Die Faltung gemäß der vorliegenden Erfindung ist dabei so ausgeführt, dass mindestens bereichsweise Übereinander liegende Lagen des Beutelmaterials im Boden vorliegen und diese mindestens teilweise untereinander verbunden sind. Durch diese Ausgestaltung wird eine klotzbodenähnliche Stabilisierung des Staubsaugerbeutels erreicht.It is thus proposed according to the invention that the vacuum cleaner bag, which consists of a nonwoven material, has an at least partially closed end with respect to the free closed end, the latter being folded to form a base. The folding according to the present invention is carried out in such a way that layers of the bag material lying one above the other are present in the bottom at least in regions and are at least partially connected to one another. With this configuration, a block bottom-like stabilization of the vacuum cleaner bag is achieved.
Der entscheidende Vorteil der erfindungsgemäßen Lösung ist darin zu sehen, dass durch die mittige Schweißnaht und dem mindestens teilweisen Verbinden der übereinander gefalteten Lagen eine Stabilisierung des Bodens erreicht wird, die ausreicht, um auch aus einem biegeschlaffen Material, einen Staubsaugerbeutel bereitzustellen, der an jeder Stelle mit einer Halteplatte versehen werden kann und der dadurch leicht in einen Staubsauger eingebaut werden kann.The decisive advantage of the solution according to the invention is to be seen in the fact that the central weld seam and the at least partial connection of the layers folded over one another stabilize them of the floor is reached, which is sufficient to provide a vacuum cleaner bag, which can be provided at any point with a holding plate and which can therefore be easily installed in a vacuum cleaner, even from a flexible material.
Weiter hervorzuheben bei der erfindungsgemäßen Lösung ist, dass die Halteplatte in Bezug auf ihre Ausgestaltung frei gewählt werden kann. Bei der erfindungsgemäßen Lösung ist es somit möglich, Halteplatten an- zubringen, die nicht nur eine Öffnung aufweisen, sondern die zusätzlich mit Schiebern oder Klappen versehen sind, um die Öffnung zu verschließen. Nach der vorliegenden Erfindung ist es auch möglich, die Halteplatte nicht direkt auf dem Boden anzubringen, son- dem diese kann auch auf den Längsflächen des Staubsaugerbeutels angeordnet werden.It should also be emphasized in the solution according to the invention that the holding plate can be freely selected with regard to its design. In the solution according to the invention, it is thus possible to attach holding plates which not only have an opening, but which are additionally provided with slides or flaps in order to close the opening. According to the present invention, it is also possible not to mount the holding plate directly on the floor, but this can also be arranged on the longitudinal surfaces of the vacuum cleaner bag.
Beim erfindungsgemäßen Staubsaugerbeutel ist es dabei bevorzugt, wenn' die mittige Schweißnaht über die ge- sa te Breite des Bodens geführt ist. Dadurch wird eine erhöhte Stabilität des durch die Faltung gebildeten Bodens erreicht. Das Verbinden der übereinander- liegenden Lagen, die durch die Faltung gebildet worden sind, erfolgt vorzugsweise durch Verschweißen oder Verkleben. Dieses Verkleben oder Verschweißen kann linienförmig erfolgen. Dadurch kann eine gerichtete Verstärkung des Bodens realisiert werden.In the case of the vacuum cleaner bag according to the invention, it is preferred if the central weld seam is made over the entire width of the bottom. This increases the stability of the bottom formed by the folding. The layers lying one above the other, which have been formed by the folding, are preferably connected by welding or gluing. This gluing or welding can be linear. This enables directional reinforcement of the floor.
Beim erfindungsgemäßen Staubsaugerbeutel ist es wei- terhin günstig, wenn über die Längsseiten, d.h. über diejenigen Flächen des Staubsaugerbeutels die zwischen dem geschlossenen freien Ende und dem mindestens teilweise geschlossenen Ende mit dem erfindungsgemäß ausgebildeten Boden in die dadurch aufgespann- ten Seitenflächen Vorbrüche eingebracht werden, so dass eine Faltung möglich wird. Die Vorbrüche können dabei so ausgebildet sein, dass sie z.B. von den jeweiligen Ecken des Bodens, wenn dieser eckig, z.B. viereckig, geformt ist, ausgehen und bis zum gegenüberliegenden freien Ende geführt sind. Vorteilhaft ist es zudem, wenn zusätzlich ausgehend von der mittigen Schweißnaht jeweils ein weiterer Vorbruch in das Beutelmaterial eingebracht ist. Dadurch wird das Einbringen von Seitenfalten erleichtert und die Oberfläche des Staubsaugerbeutels vergrößert. Gleichzei- tig können die in die Längsseiten des Staubsaugerbeutels eingebrachten Vorbrüche zur weiteren Stabilisierung des Beutelmaterials dienen. Unter einen Vorbruch im Sinne der Erfindung werden Materialverdichtungen verstanden, die bevorzugt linienförmig ausgebildet sind. Die Vorbrüche können durch geeignetes Formwerkzeug und/oder durch Schweißen eingebracht werden.In the case of the vacuum cleaner bag according to the invention, it is furthermore advantageous if the longitudinal sides, that is to say those surfaces of the vacuum cleaner bag, are used to introduce the breaks between the closed free end and the at least partially closed end with the base designed according to the invention into the side surfaces thereby clamped, so that folding is possible. The fractions can be designed so that they extend, for example, from the respective corners of the floor, if the floor is square, for example square, and are guided to the opposite free end. It is also advantageous if, starting from the central weld seam, a further pre-break is introduced into the bag material. This facilitates the insertion of gussets and increases the surface of the vacuum cleaner bag. At the same time, the pre-breaks introduced into the long sides of the vacuum cleaner bag can serve to further stabilize the bag material. A pre-break in the sense of the invention is understood to mean material densifications that are preferably linear. The pre-cracks can be introduced by means of a suitable molding tool and / or by welding.
Vorteilhafterweise verfügt der erfindungsgemäße Filterbeutel ebenso über einen Vorbruch der parallel zur mittigen Schweißnaht geführt ist. Dieser dient zum Umfalten des Bodens in Richtung der Längsseite des Filterbeutels. Es ist deshalb ausreichend, wenn eine derartiger Vorbruch vorhanden ist. Der Abstand des Vorbruchs ist so gewählt, dass er ausgehend von der mittigen Schweißnaht der Breite des Bodens entspricht.Advantageously, the filter bag according to the invention also has a pre-break that is parallel to the central weld. This is used to fold the base towards the long side of the filter bag. It is therefore sufficient if there is such a break. The distance of the pre-break is chosen so that it corresponds to the width of the bottom, starting from the central weld.
Bevorzugt ist es beim erfindungsgemäßen Beutel, wenn der Boden eckig, besonders bevorzugt eine rechteckige Form aufweist. Für diesen Fall sind die Vorbrüche von den jeweiligen kurzen Seiten des Rechtecks ausgehend bis zum freien verschlossenen Ende geführt. Ein weiterer Vorbruch ist ausgehend von der mittigen Schweißnaht zum freien Ende geführt. Eine derartige Ausführungsform hat sich als besonders bevorzugt erwiesen. In Bezug auf die Halteplatte ist es gemäß der vorliegenden Erfindung möglich, diese entweder, wie von Papierfiltertüten bekannt, mit dem Klotzboden zu verbinden, oder die Halteplatte auf den freien Seiten- flächen des Staubsaugerbeutels anzubringen. Bevorzugt ist hierbei die Ausführungsform, bei der die Halteplatte auf dem Boden des Beutels, diesen mindestens teilweise überdeckend, angebracht ist. Dadurch, dass gemäß der vorliegenden Erfindung der Beutel durch die Ausbildung des Bodens stabilisiert ist, kann auch die Halteplatte innen liegend im Beutel angebracht sein. Diese kann z.B. dadurch realisiert werden, indem die Halteplatte mit dem für die Bodenbildung vorgesehenen Stempel gleichzeitig eingeführt und verbunden wird.It is preferred in the bag according to the invention if the bottom is angular, particularly preferably rectangular. In this case, the fractions are made from the respective short sides of the rectangle to the free, closed end. Another break is from the central weld to the free end. Such an embodiment has proven to be particularly preferred. With regard to the holding plate, it is possible according to the present invention either to connect it to the block bottom, as is known from paper filter bags, or to attach the holding plate to the free side surfaces of the vacuum cleaner bag. Preferred is the embodiment in which the holding plate is attached to the bottom of the bag, at least partially covering it. Due to the fact that, according to the present invention, the bag is stabilized by the formation of the bottom, the holding plate can also be attached to the inside of the bag. This can be achieved, for example, by simultaneously inserting and connecting the holding plate with the stamp provided for the bottom formation.
Vorteilhaft ist weiterhin, dass durch die Stabilisierung des Bodens als solches einstückige Halteplatten verwendet werden können. Diese können auch dann mit einem Verschlussmechanismus versehen sein.It is also advantageous that one-piece holding plates can be used as such by the stabilization of the soil. These can also be provided with a locking mechanism.
Die Halteplatte ist dabei wie an und für sich aus dem Stand der Technik bekannt aufgebaut und weist mindestens eine Durchgangsöffnung auf, die zur Zufuhr der zu reinigenden Luft dient. Die Halteplatte kann wei- terhin ein Element, z. B. einen Schieber oder eineThe holding plate is constructed as is known per se from the prior art and has at least one through opening which serves to supply the air to be cleaned. The holding plate can also be an element, for. B. a slide or a
Klappe zum Verschluss der Öffnung aufweisen. Die Halteplatte kann dabei mit allen gängigen Techniken des Standes der Technik mit dem Boden des Beutels verbunden werden. Hierfür kommen z.B. ein Ankleben oder ein Verschweißen in Frage.Have a flap to close the opening. The holding plate can be connected to the bottom of the bag using all of the common techniques of the prior art. For this come e.g. sticking or welding in question.
Gemäß der vorliegenden Erfindung ist es aber auch möglich, dass die Halteplatte auf den Seitenflächen des Staubsaugerbeutels angeordnet ist. Bevorzugt ist es hierbei, wenn die Halteplatte in der Nähe des Bodens angebracht ist, da dadurch der durch den Boden frei aufgespannte Innenraum im Beutel für das Einführen eines Füllstutzens und eine vorteilhafte Luftführung ausgenutzt werden kann. Die Halteplatten können, wie an und für sich aus dem Stand der Technik bekannt, aus Kunststoff oder Pappe bestehen.According to the present invention, however, it is also possible for the holding plate to be arranged on the side surfaces of the vacuum cleaner bag. In this case, it is preferred if the holding plate is attached in the vicinity of the floor, since it is through the floor freely spanned interior in the bag for the insertion of a filler neck and an advantageous air duct can be used. The holding plates can, as is known per se from the prior art, consist of plastic or cardboard.
Beim Filterbeutel gemäß der vorliegenden Erfindung ist dabei bevorzugt das Beutelmaterial aus einem mehrlagigen Vliesmaterial zu bilden, wie es z.B. in der WO 01/03802 AI beschrieben ist. Auf den Offenbarungsgehalt dieses Dokumentes wird deshalb ausdrücklich Bezug genommen. Die Erfindung schließt jedoch auch alle anderen Vliesmaterialien, die bisher imIn the case of the filter bag according to the present invention, the bag material is preferably to be formed from a multi-layer nonwoven material, as is e.g. is described in WO 01/03802 AI. Reference is therefore expressly made to the disclosure content of this document. However, the invention also includes all other nonwoven materials previously used in the
Stand der Technik für Filterbeutel bekannt sind, mit ein.State of the art for filter bags are known with a.
Die Erfindung betrifft weiterhin ein Verfahren zur Herstellung eines Filterbeutels wie vorstehend beschrieben. Gemäß der vorliegenden Erfindung wird in einem ersten Verfahrensschritt ein schlauchartiger Beutel mit dem mindestens teilweise verschlossenen Endbereich hergestellt.The invention further relates to a method for producing a filter bag as described above. According to the present invention, a tube-like bag with the at least partially closed end region is produced in a first method step.
Die Herstellung dieses schlauchartigen Beutels mit dem mindestens teilweise verschlossenen Endbereich kann dabei taktweise erfolgen. Dabei wird der schlauchartige Beutel hergestellt, indem die Bildung des schlauchartigen Materials durch Verbinden z. B. der beiden Ränder einer Lage des Beutelmaterials erfolgt und wobei dann ein Verschließen des dadurch gebildeten offenen Bereiches durchgeführt wird.This tube-like bag with the at least partially closed end region can be produced in cycles. The tubular bag is made by the formation of the tubular material by connecting z. B. the two edges of a layer of the bag material and then a closing of the open area formed thereby is carried out.
Das Verbinden der Ränder der Lagen und das Verschließen des offenen Endes kann taktweise erfolgen. Ebenso ist ein kontinuierliches Verbinden der Ränder der Lagen möglich.The edges of the layers can be connected and the open end closed in cycles. As well continuous joining of the edges of the layers is possible.
Aus prozessökonomischen Gründen ist es günstig, wenn das Verbinden des offenen Endes und das Verschließen des freien Endes des zuvor hergestellten Filterbeutels gleichzeitig erfolgt. Dabei kann auch das Abtrennen der Beutel erfolgen.For reasons of process economy, it is expedient if the connection of the open end and the closing of the free end of the previously produced filter bag takes place simultaneously. The bags can also be separated.
Das Verbinden sowohl bei der Bildung des Schlauches wie auch beim Verbinden des offenen Endes kann durch Ultraschallschweißen erfolgen. Auch ein thermisches Schweißen ist möglich.The connection, both when forming the hose and when connecting the open end, can be carried out by ultrasonic welding. Thermal welding is also possible.
Bevorzugt wird dabei die Verschweißung so vorgenommen, dass die Schweißnaht über die beiden übereinan- derliegenden Bahnen geführt wird.The welding is preferably carried out in such a way that the weld seam is guided over the two tracks lying one above the other.
Beim Verfahren nach der Erfindung ist es weiterhin vorgesehen, dass die Ausbildung der Vorbrüche während des Verfahrensschrittes a) durchgeführt wird. Gemäß der vorliegenden Erfindung werden somit durch geeignete Formwerkzeuge oder auch durch zusätzliche Schweißnähte die Vorbrüche in den Filterbeutel einge- bracht.In the method according to the invention, it is further provided that the formation of the pre-breaks is carried out during step a). According to the present invention, the pre-cracks are thus introduced into the filter bag by means of suitable shaping tools or also by means of additional weld seams.
Die Erfindung umfasst dabei aber auch diejenigen Ausführungsformen, bei denen das Einbringen der Vorbrüche in einem vor oder nach Verfahrensschritt a) lie- genden Verfahrensschritt durchgeführt wird. Aus pro- zessökonomischen Gründen ist jedoch die vorstehend beschriebene Variante bevorzugt, bei der die Vorbrüche bereits während des Verfahrensschrittes a) eingebracht werden.However, the invention also includes those embodiments in which the introduction of the pre-creases is carried out in a method step before or after method step a). For process economic reasons, however, the variant described above is preferred, in which the pre-breaks are introduced during process step a).
Die Ausbildung des Bodens erfolgt gemäß der vorlie- genden Erfindung dadurch, dass ein Stempel von der offenen Seite in den nach Verfahrensschritt a) hergestellten Beutel eingeführt wird. Dadurch kommt es beim verschlossenen Ende automatisch zu einer Umfal- tung im Bereich des Bodens. Zur Stabilisierung des dadurch gebildeten Bodens ist es dann wesentlich, dass die durch das Umfalten gebildeten übereinander liegenden Lagen mindestens teilweise verbunden werden. Bevorzugt wird dies so durchgeführt, dass die übereinanderliegenden Lagen verklebt oder verschweißt werden. Dadurch wird eine zusätzliche Stabilisierung des Bodens erreicht. Bei den Verfahren zum Verbinden der übereinanderliegenden Lagen können alle aus dem Stand der Technik bekannten Verfahren angewandt wer- den. Hierbei wären ein Verkleben oder ein Verschweißen zu nennen. Auch ist ein Verklammern der einzelnen Lagen durchführbar. Wenn das Verbinden der Lagen mittels Schweißen oder Kleben durchgeführt wird, so ist es weiterhin bevorzugt, wenn dies linienförmig er- folgt.The soil is formed in accordance with the ing invention in that a stamp is inserted from the open side into the bag produced according to process step a). This automatically folds in the area of the floor at the closed end. In order to stabilize the base formed thereby, it is then essential that the layers lying one above the other formed by the folding are at least partially connected. This is preferably carried out in such a way that the layers lying one above the other are glued or welded. This results in additional stabilization of the soil. All methods known from the prior art can be used in the methods for connecting the superimposed layers. Gluing or welding should be mentioned here. Clamping of the individual layers can also be carried out. If the layers are connected by means of welding or gluing, it is further preferred if this is done in a linear manner.
Ein weiterer Vorteil des erfindungsgemäßen Verfahrens ist darin zu sehen, dass der für die Bodenbildung vorgesehene Stempel als A boss eingesetzt wird. Der Amboss kann auch als Schallreflektor für eine So- notrode beim Ultraschallschweißen dienen. Der Amboss kann auch als Stützelement für die Ausbildung von Vorbrüchen dienen. Ferner kann er auch als Stützelement beim Stanzen der Füllöffnung eingesetzt werden. Auch eine umgekehrte Verfahrensführung ist möglich. So kann auch der Stempel als Sonotrode eingesetzt werden.Another advantage of the method according to the invention can be seen in the fact that the stamp provided for the bottom formation is used as A boss. The anvil can also serve as a sound reflector for a sootrode during ultrasonic welding. The anvil can also serve as a support element for the formation of pre-cracks. Furthermore, it can also be used as a support element when punching the filling opening. A reverse procedure is also possible. The stamp can also be used as a sonotrode.
Durch das erfindungsgemäße Verfahren wird somit eine Faltung des Bodens erreicht, die zu einer Stabilisierung des biegeschlaffen Materials im Bodenbereich führt. Dadurch wird nun die Möglichkeit eröffnet, dass die Halteplatte nicht nur im Bereich des Bodens direkt auf den Boden angeordnet werden kann, sondern dass diese Halteplatte auch auf den Längsseiten des Beutels angebracht werden kann. Auch eröffnet das erfindungsgemäße Verfahren die Möglichkeit, die Halteplatte innen liegend am Boden anzuordnen. Hierzu wird die Halteplatte in einem Arbeitsgang mit dem Stempel eingeführt und mit dem Beutelmaterial ver- schweißt/verklebt . Gemäß dem vorliegenden Verfahren ist es noch erforderlich, dass an den Stellen, an denen die Halteplatte angebracht wird, noch eine entsprechende Öffnung in den Beutel eingebracht wird. Sofern die Halteplatte direkt auf dem Boden angeord- net wird, wird eine entsprechende Öffnung in den Bodenbereich eingebracht. Das Einbringen dieser Öffnung kann entweder in der noch nicht zum Schlauch geformten Bahn oder während des Verfahrensschrittes a) erfolgen. Das Einbringen der Füllöffnung kann auch im Verfahrensschritt b) oder schon in der noch nicht zum Schlauch geformten Bahn also vor Verfahrensschritt a) erfolgen.The method according to the invention thus folds the base, which stabilizes the limp material in the base area leads. This now opens up the possibility that the holding plate can not only be arranged directly on the floor in the region of the bottom, but that this holding plate can also be attached to the long sides of the bag. The method according to the invention also opens up the possibility of arranging the holding plate lying inside on the floor. For this purpose, the holding plate is inserted with the stamp in one operation and welded / glued to the bag material. According to the present method, it is still necessary for a corresponding opening to be made in the bag at the points at which the holding plate is attached. If the holding plate is arranged directly on the floor, a corresponding opening is made in the floor area. This opening can be introduced either in the web which has not yet been formed into a tube or during process step a). The filling opening can also be introduced in process step b) or already in the web which has not yet been formed into a tube, ie before process step a).
Die Erfindung wird nachfolgend anhand der Figuren 1 bis 4 näher beschrieben.The invention is described below with reference to Figures 1 to 4.
Figur 1 zeigt einen erfindungsgemäßen Filterbeutel im halbfertigen Zustand in einseitig offener Form.Figure 1 shows a filter bag according to the invention in the semi-finished state in one-sided open form.
Figur 2 zeigt einen erfindungsgemäßen Filterbeutel mit einem rechteckigen Boden.Figure 2 shows a filter bag according to the invention with a rectangular bottom.
Figur 3 zeigt eine weitere Ausführungsform mit einer speziellen Faltung des Bodens. Figuren 4a bis 4c zeigt den Ablauf des Herstellungsverfahrens . Figur 1 zeigt den erfindungsgemäßen Filterbeutel 1 schematisch in dem Zustand wie er nach Bildung des schlauchartigen Beutels und Verschließen des freien Endbereiches resultiert (Verfahrensschritt a) ) . Der Filterbeutel 1 besteht dabei aus einem Verbundvlies- material, wie es in der WO 01/03802 AI beschrieben ist. Bei der Ausführungsform nach Figur 1 weist der Filterbeutel Vorbrüche 3, 4 und 5 auf, die zu der abgebildeten Faltenbildung führen. Unter Vorbruch wird dabei eine Materialverdichtung verstanden. Diese kann z. B. durch Druck oder Druck und Temperatur erfolgen. Durch die Vorbrüche 3, 4 und 5 entsteht ein gefalteter, schlauchartiger Filterbeutel, der an seinem verschlossenen Ende 2 durch eine Schweißnaht 6 verschlossen ist.Figure 3 shows a further embodiment with a special folding of the bottom. Figures 4a to 4c shows the sequence of the manufacturing process. FIG. 1 shows the filter bag 1 according to the invention schematically in the state as it results after the tubular bag has been formed and the free end area has been closed (method step a)). The filter bag 1 consists of a composite nonwoven material, as described in WO 01/03802 AI. In the embodiment according to FIG. 1, the filter bag has breaks 3, 4 and 5 which lead to the formation of folds shown. The term pre-break is understood to mean material compaction. This can e.g. B. done by pressure or pressure and temperature. The folds 3, 4 and 5 create a folded, tubular filter bag, which is closed at its closed end 2 by a weld 6.
Die mittige Schweißnaht 6 ist bei der Ausführungsform nach Figur 1 durch thermisches Schweißen eingebracht worden. Die Schweißung ist dabei so ausgeführt worden, dass die beiden übereinanderliegenden Lagen des Filtermaterials durch die Schweißung miteinander verbunden worden sind. Der Filterbeutel nach Fig. 1 weist zusätzlich noch einen Vorbruch 7 auf. Dieser dient zum Umfalten des Bodens.In the embodiment according to FIG. 1, the central weld seam 6 has been introduced by thermal welding. The welding was carried out in such a way that the two layers of filter material lying one above the other were connected to one another by the welding. 1 additionally has a pre-break 7. This is used to fold the floor.
Figur 2 zeigt den Filterbeutel 1 in einer bevorzugten Ausführungsform. Der Filterbeutel 1 nach der Figur 2 besitzt einen rechteckigen Boden 9 mit zwei kurzen Querseiten 10 und zwei Längsseiten 11. Bei dem erfindungsgemäßen Filterbeutel 1 nach der Figur 2 sind a- nalog der Figur 1 die Vorbrüche mit 3, 4 und 5 bezeichnet. Durch diese Vorbrüche 3, 4 und 5 wird die Kontur des Filterbeutels 1 bestimmt. Wesentlich beim erfindungsgemäßen Filterbeutel ist nun die Faltung, d.h. die Ausgestaltung des Bodens 9. Der Boden 9 weist nun an seinen kurzen Querseiten 10 eine Faltung auf. Die Faltung entsteht durch Übereinanderlagern des Filtermaterials, wie es in Figur 1 dargestellt worden ist. Die Geometrie der Faltung wird dabei durch die Vorbrüche 3, 4 und 5 bestimmt. Im Randbereich 10 wird somit unter dem aufgespannten Boden 9 ein dreieckförmiger Zwickel überdeckt. Der gebildete dreieckförmige Zwickel 8 ist in der Fig. 2 durch gestrichelte Linien dargestellt. Der außen liegende randseitige Schenkel 12 des Dreiecks ist erfindungsgemäß mit der Querseite 10 des Bodens 9 verbunden. Im Beispielsfall nach der Figur 2 ist die Querseite 10 des Bodens 9 mit dem Schenkel 12 miteinander verklebt. Gemäß der vorliegenden Erfindung ist jedoch jede andere Ausführungsform eingeschlossen, bei der andere aus dem Stand der Technik bekannte Verbin- dungstechnologien angewandt werden. Ein derartigesFigure 2 shows the filter bag 1 in a preferred embodiment. The filter bag 1 according to FIG. 2 has a rectangular bottom 9 with two short transverse sides 10 and two long sides 11. In the filter bag 1 according to the invention according to FIG. 2, the fractions are designated 3, 4 and 5 analogously to FIG. Due to these fractions 3, 4 and 5, the Contour of the filter bag 1 determined. The folding in the filter bag according to the invention is now essential, ie the design of the bottom 9. The bottom 9 now has a folding on its short transverse sides 10. The fold is created by superimposing the filter material, as has been shown in FIG. 1. The geometry of the folding is determined by the fractions 3, 4 and 5. In the edge area 10, a triangular gusset is thus covered under the spanned bottom 9. The triangular gusset 8 formed is shown in FIG. 2 by dashed lines. According to the invention, the outer edge-side leg 12 of the triangle is connected to the transverse side 10 of the base 9. In the example according to FIG. 2, the transverse side 10 of the base 9 is glued to the leg 12. According to the present invention, however, any other embodiment is included, in which other connection technologies known from the prior art are applied. Such a thing
Verbinden kann z.B. auch mittels Ultraschallschweißen oder durch Verklammerung erfolgen. Bei der Ausfüh- rungsform der Figur 2 ist ferner noch ein Vorbruch 7 vorhanden. Dieser dient zum Umfalten des Bodens in Richtung der Längsseite des Beutels 1. Der Abstand des Vorbruchs 7 von der mittigen Schweißnaht 6 entspricht daher der Breite des Bodens 9, so dass ein vollständiges Umfalten des Bodens 9 möglich ist.Can connect e.g. also by means of ultrasonic welding or by stapling. In the embodiment of FIG. 2, there is also a pre-break 7. This serves to fold over the bottom in the direction of the longitudinal side of the bag 1. The distance of the pre-break 7 from the central weld 6 therefore corresponds to the width of the bottom 9, so that a complete folding over of the bottom 9 is possible.
Die Filtertüte 1 ist ferner an seinem freien Ende 13 durch eine weitere Schweißnaht 15 verschlossen. Bei der erfindungsgemäßen Filtertüte ist besonders darauf hinzuweisen, dass durch die wie vorstehend beschriebene Faltung und die Verbindung der Lagen sowie der mittigen Schweißnaht 6 eine Stabilisierung des Bodens 9 hergestellt wird. Der große Vorteil des erfindungs- gemäßen Filterbeutels ist darin zu sehen, dass der Boden 9 auch ohne eine zusätzliche Halteplatte genügend Stabilität aufweist. Bei der Ausführungsform nach der Figur 2 weist der Boden noch eine Durchgangsöffnung 16 auf. Diese Durchgangsöffnung 16 kann dann mit einer Halteplatte versehen werden (nicht abgebildet) , so dass dann die Filtertüte in eine entsprechende Halterung in den Staubsauger eingehängt werden kann.The filter bag 1 is also closed at its free end 13 by a further weld 15. In the case of the filter bag according to the invention, it should be pointed out in particular that the bottom 9 is stabilized by the folding described above and the connection of the layers and the central weld 6. The great advantage of the invention According to the filter bag, it can be seen that the base 9 has sufficient stability even without an additional holding plate. In the embodiment according to FIG. 2, the bottom also has a through opening 16. This through opening 16 can then be provided with a holding plate (not shown), so that the filter bag can then be hung in a corresponding holder in the vacuum cleaner.
Figur 3 zeigt nun eine weitere Möglichkeit, wie die Faltung des Bodens 9 vorgenommen werden kann. Bei der Ausführungsform nach Figur 3 ist wiederum eine mittige Schweißnaht 6 vorhanden. Wie Figur 3 zeigt, ist bei dieser Ausführungsform ein Zwickel 19 und 20 gebildet, der wie aus der Figur hervorgeht, in zwei verschiedenen Richtungen umgeklappt werden kann. So wird es möglich, den Zwickel nach unten auf die Seitenflächen des Filterbeutels 1 zu falten und dort zu verkleben (Pfeilrichtung a) oder aber der Zwickel kann auf dem restlichen Teil des Bodens 9 zurückgefaltet werden und dort ebenfalls verklebt werden. Auch durch diese Ausführungsform wird wiederum eine Stabilisierung des Bodens 9 erreicht. Auch die Fil- tertüte nach der Figur 3 weist wieder Vorbrüche 3, 4 auf, mit denen die Kontur des Filterbeutels bestimmt wird.FIG. 3 now shows a further possibility of how the bottom 9 can be folded. In the embodiment according to FIG. 3 there is again a central weld 6. As FIG. 3 shows, in this embodiment a gusset 19 and 20 is formed which, as can be seen from the figure, can be folded over in two different directions. This makes it possible to fold the gusset down onto the side surfaces of the filter bag 1 and glue it there (arrow direction a), or else the gusset can be folded back onto the remaining part of the base 9 and glued there as well. Stabilization of the soil 9 is again achieved by this embodiment. The filter bag according to FIG. 3 also has protrusions 3, 4 with which the contour of the filter bag is determined.
Fig. 4 zeigt nun anhand der Figuren 4a bis 4c den Ab- lauf des erfindungsgemäßen Herstellungsverfahrens.4 now shows the sequence of the manufacturing method according to the invention with reference to FIGS. 4a to 4c.
Fig. 4a zeigt schematisch wie eine Lage des Filtermaterials zusammengefaltet und an dessen Rändern 22 und 23 verbunden wird. Die Kontur des entsprechenden Fil- terbeutels wird dabei über ein nicht dargestelltes Formwerkzeuges definiert. Während des Herstellungs- Verfahrens des Filterbeutels wird dabei auch beim ersten Verfahrensschritt, d. h. bei der Bildung des Schlauches die entsprechenden Vorbrüche 3, 4 und 5 in das Filterbeutelmaterial eingebracht. Bevorzugt er- folgt dabei das Verbinden des Filtermaterials an den Rändern 22 und 23 taktweise, d. h. bei der in Fig. 4a durch die Bezeichnung „Stop" dargestellten Position wird die Verschweißung vorgenommen. Anschließend an diesem Takt wird dann der so gebildeten Schlauch bis zu der mit „Stop 2" gekennzeichneten Stelle weitergeführt. An dieser Stelle erfolgt nun das Verschließen des Beutels. Bevorzugt wird dies durch Ultraschallschweißen durchgeführt. Wie Fig. 4a zeigt, arbeitet das erfindungsgemäße Verfahren bevorzugt so, dass mit dem Verschließen des Schlauches und Bildung der mittigen Schweißnaht 6 der im Arbeitsgang vorher hergestellte Filterbeutel an seinem gegenüberliegenden freien Ende 13 verschlossen wird. Gemäß dem vorliegenden Verfahren erfolgt somit ein Verschließen und Abtrennen des Filterbeutels in einem Arbeitsgang.4a schematically shows how a layer of the filter material is folded up and connected at its edges 22 and 23. The contour of the corresponding filter bag is defined using a shaping tool, not shown. During the manufacturing The process of the filter bag is also introduced into the filter bag material in the first process step, ie when the hose is formed, the corresponding breakouts 3, 4 and 5. The filter material is preferably connected at the edges 22 and 23 in cycles, ie the welding is carried out at the position shown by the designation “Stop” in FIG. 4a point marked with "Stop 2" continued. At this point, the bag is closed. This is preferably carried out by ultrasonic welding. As FIG. 4 a shows, the method according to the invention preferably works in such a way that when the hose is closed and the central weld seam 6 is formed, the filter bag previously produced in the work step is closed at its opposite free end 13. According to the present method, the filter bag is thus closed and separated in one operation.
Dies kann mit einem geteilten Schweißwerkzeug durchgeführt werden.This can be done with a split welding tool.
Fig. 4b zeigt den Verfahrensschritt des erfindungsge- mäßen Verfahrens bei dem die Faltung des Bodens durchgeführt wird. Die Faltung des Bodens wird nachfolgend nach Verschließen des Filterbeutels mit der Schweißnaht 6 an seinem Ende 2 durchgeführt. Dies ist in Fig. 4a dargestellt. Zur Bodenbildung wird nun ein Stempel 24 von der noch offenen Seite in den Filterbeutel eingeführt und gegen das verschlossene Ende 2 geführt. Durch das Einführen des Stempels 24 in Richtung des verschlossenen Endes 2 wird nun durch die Vorgabe der Konturen 3, 4 und 5 die erfindungsgemäße Faltung des Bodens 9 erreicht. Diese Faltung wird, noch während der Stempel in seiner unteren Position ist (Figur 4b), durch Verbinden der jetzt übereinander liegenden Lagen stabilisiert.4b shows the method step of the method according to the invention in which the folding of the bottom is carried out. The bottom is then folded after the filter bag has been sealed with the weld 6 at its end 2. This is shown in Fig. 4a. To form the bottom, a stamp 24 is now inserted into the filter bag from the still open side and guided against the closed end 2. By inserting the stamp 24 in the direction of the closed end 2, the folding of the base 9 according to the invention is now achieved by specifying the contours 3, 4 and 5. This folding is done while the stamp is in its lower position is stabilized (FIG. 4b) by connecting the layers now lying one above the other.
Zur Fertigstellung des Filterbeutels wird nun durch Abtrennen dieses Beutels vom davor liegenden Filterbeutel wie vorstehend beschrieben, der fertige Filterbeutel wie in Fig. 4c dargestellt, hergestellt.To complete the filter bag, the finished filter bag is now produced as shown in FIG. 4c by separating this bag from the filter bag lying in front of it, as described above.
Gemäß dem erfindungsgemäßen Verfahren ist es weiter- hin vorgesehen, noch entsprechende Öffnungen in denAccording to the method according to the invention, it is further provided that corresponding openings in the
Filterbeutel einzubringen. Die Öffnung wird dabei bevorzugt während des Verfahrensschrittes a) oder b) in das Filterbeutelmaterial eingebracht. Letztlich ist zur Fertigstellung des Filterbeutels es noch erfor- derlich, auch die Halteplatte anzubringen. Das Anbringen der Halteplatte kann dabei z. B. gleichzeitig mit der Bodenbildung erfolgen oder aber die Halteplatte wird nachträglich angebracht. Insert filter bag. The opening is preferably introduced into the filter bag material during process step a) or b). Ultimately, to complete the filter bag, it is also necessary to attach the holding plate. The attachment of the holding plate can, for. B. take place simultaneously with the formation of the bottom or the holding plate is retrofitted.

Claims

Patentansprüche claims
1. Filterbeutel (1) für einen Staubsauger umfassend einen schlauchartigen Beutel (1) aus einem mindestens eine Vliesschicht aufweisenden Beutelmaterial mit einem verschlossenen freien Endbereich (13) und einem gegenüberliegenden mindestens teilweise verschlossenen Bereich (2) , sowie einer Halteplatte, wobei die Kanten des schlauchartigen Beutels zur Bildung des teilweise verschlossenen Bereiches (2) durch eine Schweißnaht (6) mindestens teilweise miteinander verbunden sind und wobei durch bereichsweiser Ausbildung übereinander liegender Lagen des Beutelmaterials, die mindestens teilweise untereinander verbunden sind, ein Boden gebildet ist.1. Filter bag (1) for a vacuum cleaner comprising a tubular bag (1) made of a bag material having at least one nonwoven layer with a closed free end region (13) and an opposite at least partially closed region (2), and a holding plate, the edges of the tubular bag for forming the partially closed area (2) are at least partially connected to one another by a weld seam (6) and a bottom is formed by partially forming layers of the bag material which are at least partially connected to one another.
2. Filterbeutel nach Anspruch 1, dadurch gekennzeichnet, dass die Schweißnaht (6) im Boden (9) über die gesamte Breite des Bodens geführt ist.2. Filter bag according to claim 1, characterized in that the weld seam (6) in the bottom (9) is guided over the entire width of the bottom.
3. Filterbeutel nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die bereichsweise im Boden (9) durch Faltung gebildeten übereinanderliegenden Lagen durch Verkleben und/oder Verschweißen verbunden sind.3. Filter bag according to claim 1 or 2, characterized in that the regions in the bottom (9) formed by folding superimposed layers are connected by gluing and / or welding.
4. Filterbeutel nach Anspruch 3, dadurch gekennzeichnet, dass eine linienförmige Verklebung und/oder Verschweißung vorliegt.4. Filter bag according to claim 3, characterized in that there is a linear adhesive and / or welding.
5. Filterbeutel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Boden (9) in eckiger Form vorliegt. 5. Filter bag according to one of claims 1 to 4, characterized in that the bottom (9) is in an angular shape.
6. ' Filterbeutel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Boden (9) Rechteckform aufweist.6. 'Filter bag according to one of claims 1 to 5, characterized in that the bottom (9) has a rectangular shape.
7. Filterbeutel nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass ausgehend vom Boden (9) zum verschlossenen freien Ende (13) mindestens ein Vorbruch (3, 4, 5) im Beutelmaterial eingebracht ist.7. Filter bag according to one of claims 1 to 6, characterized in that starting from the bottom (9) to the closed free end (13) at least one pre-break (3, 4, 5) is introduced in the bag material.
8. Filterbeutel nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass ausgehend von den jeweiligen Ecken des Bodens (9) zum verschlossenen freien Ende (13) im Beutelmaterial Vorbrüche (3, 4) im Beutelmaterial eingebracht sind.8. Filter bag according to one of claims 5 to 7, characterized in that starting from the respective corners of the bottom (9) to the closed free end (13) in the bag material, pre-breaks (3, 4) are introduced in the bag material.
9. Filterbeutel nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass ausgehend von der Schweißnaht (6) im Boden (9) mindestens ein Vorbruch (5) bis zum verschlossenen freien Ende (13) in das Beutelmaterial eingebracht ist.9. Filter bag according to one of claims 1 to 8, characterized in that starting from the weld seam (6) in the bottom (9) at least one pre-break (5) up to the closed free end (13) is introduced into the bag material.
10. Filterbeutel nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass ein Vorbruch (7) parallel zur Schweißnaht (6) im Boden (9) in das Beutelmaterial eingebracht ist.10. Filter bag according to one of claims 1 to 9, characterized in that a pre-break (7) parallel to the weld (6) in the bottom (9) is introduced into the bag material.
11. Filterbeutel nach Anspruch 10, dadurch gekennzeichnet, dass der Vorbruch (7) mit einem Ab- stand zur Schweißnaht (6) in das Beutelmaterial eingebracht ist, der etwa der Breite des Bodens (9) entspricht.11. Filter bag according to claim 10, characterized in that the pre-break (7) is introduced into the bag material at a distance from the weld seam (6) which corresponds approximately to the width of the bottom (9).
12. Filterbeutel nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass auf dem Boden (9) , diesen mindestens teilweise überdeckend, die Halteplatte mit mindestens einer Durchgangsöffnung (16) angeordnet ist. 12. Filter bag according to one of claims 1 to 11, characterized in that on the bottom (9), at least partially covering this, the holding plate is arranged with at least one through opening (16).
13. Filterbeutel nach Anspruch 12, dadurch gekennzeichnet, dass die Halteplatte den gesamten Boden (9) überdeckt.13. Filter bag according to claim 12, characterized in that the holding plate covers the entire bottom (9).
14. Filterbeutel nach einem der Ansprüche 1 bis 13 , dadurch gekennzeichnet, dass auf der zwischen dem durch das freie Ende (13) und dem teilweise geschlossenen Ende (2) des Beutels aufgespannten Fläche, eine Halteplatte mit mindestens einer Durchgangsöffnung angeordnet ist.14. Filter bag according to one of claims 1 to 13, characterized in that a holding plate with at least one through opening is arranged on the surface spanned between the free end (13) and the partially closed end (2) of the bag.
15. Filterbeutel nach Anspruch 14, dadurch gekennzeichnet, dass die Halteplatte im Bereich des Bodens (9) angeordnet ist.15. Filter bag according to claim 14, characterized in that the holding plate is arranged in the region of the bottom (9).
16. Filterbeutel nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass die Halteplatte durch Verkleben, und/oder Verschweißen mit dem Filterbeutel verbunden ist .16. Filter bag according to one of claims 1 to 15, characterized in that the holding plate is connected to the filter bag by gluing and / or welding.
17. Filterbeutel nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die Halteplatte aus Kunststoff gebildet ist.17. Filter bag according to one of claims 1 to 16, characterized in that the holding plate is formed from plastic.
18. Filterbeutel nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die Halteplatte aus Pappe gebildet ist .18. Filter bag according to one of claims 1 to 16, characterized in that the holding plate is made of cardboard.
19. Filterbeutel nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, dass das Beutelmaterial ein Vliesverbundmaterial ist.19. Filter bag according to one of claims 1 to 18, characterized in that the bag material is a non-woven composite material.
20. Verfahren zur Herstellung eines Filterbeutels nach einem der Ansprüche 1 bis 19, durch folgende Verfahrensschritte : a) Herstellen eines schlauchartigen Beutels und einseitiges Verschließen zur Bildung des mindestens teilweise verschlossenen Bereiches, b) Einführen eines Stempels von der offenen Seite des Beutels in Richtung des verschlossenen Endes des Beutels, so dass unter Faltung ein Boden entsteht, c) Verbinden der durch die Faltung entstandenen übereinander angeordneten Lagen im Boden.20. A method for producing a filter bag according to one of claims 1 to 19, by the following method steps: a) producing a tubular bag and closing on one side to form the at least partially closed area, b) inserting a stamp from the open side of the bag in the direction of the closed end of the bag so that a bottom is formed when folded, c) connecting the layers in the bottom which are arranged one above the other due to the folding.
21. Verfahren nach Anspruch 20, dadurch gekennzeichnet, dass die Herstellung des schlauchartigen Beutels (Verfahrensschritt a) taktweise erfolgt, wobei ein Schlauch aus einem Filtermaterial hergestellt und das offene Ende verschlossen wird.21. The method according to claim 20, characterized in that the production of the tube-like bag (method step a) takes place in cycles, wherein a tube is made of a filter material and the open end is closed.
22. Verfahren nach Anspruch 20 oder 21, dadurch gekennzeichnet, dass beim Verschließen des offenen Endes (Verfahrensschritt a) ) gleichzeitig der zuvor hergestellte Beutel an seinem freien Ende verschlossen wird.22. The method according to claim 20 or 21, characterized in that when the open end is closed (method step a)) the previously produced bag is simultaneously closed at its free end.
23. Verfahren nach Anspruch 22, dadurch gekennzeichnet, dass zusätzlich die Beutel im gleichen Arbeitsgang getrennt werden.23. The method according to claim 22, characterized in that additionally the bags are separated in the same operation.
24. Verfahren nach Anspruch 23, dadurch gekennzeichnet, dass die Trennung mechanisch erfolgt.24. The method according to claim 23, characterized in that the separation takes place mechanically.
25. Verfahren nach einem der Ansprüche 20 bis 24, dadurch gekennzeichnet, dass während des Verfahrensschrittes a) Vorbrüche eingebracht werden.25. The method according to any one of claims 20 to 24, characterized in that during the process step a) preliminary breaks are introduced.
26. Verfahren nach Anspruch 25, dadurch gekennzeichnet, dass das Einbringen der Vorbrüche durch ein geeignetes Formungswerkzeug und/oder durch Schweißen erfolgt .26. The method according to claim 25, characterized in that the introduction of the pre-cracks is carried out by a suitable shaping tool and / or by welding.
27. Verfahren nach einem der Ansprüche 20 bis 26, dadurch gekennzeichnet, dass der Stempel als Schallreflektor für eine Sonotrode eingesetzt wird.27. The method according to any one of claims 20 to 26, characterized in that the stamp as Sound reflector is used for a sonotrode.
28. Verfahren nach einem der Ansprüche 20 bis 26, dadurch gekennzeichnet, dass der Stempel als So- notrode für einen Schallreflektor eingesetzt wird.28. The method according to any one of claims 20 to 26, characterized in that the stamp is used as a sonotrode for a sound reflector.
29. Verfahren nach einem der Ansprüche 20 bis 28, dadurch gekennzeichnet, dass während des Verfahrensschrittes a) oder in das Bahnformungs- Filtermaterial eine Öffnung eingebracht wird. 29. The method according to any one of claims 20 to 28, characterized in that an opening is made during process step a) or in the web forming filter material.
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EP1677660B1 (en) 2009-12-16
ATE451862T1 (en) 2010-01-15
DE502004010530D1 (en) 2010-01-28
CN1867286B (en) 2010-06-30
US8002862B2 (en) 2011-08-23
NO337579B1 (en) 2016-05-09
DE10348375B4 (en) 2006-05-04
DE10348375A1 (en) 2005-05-19
AU2004280091A1 (en) 2005-04-21
CN1867286A (en) 2006-11-22
NO20062164L (en) 2006-07-11
AU2004280091B2 (en) 2010-12-02
ES2338123T3 (en) 2010-05-04
WO2005034708A1 (en) 2005-04-21
US20070175190A1 (en) 2007-08-02

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