EP1935797B1 - Ventilsack und Verfahren zu seiner Herstellung - Google Patents

Ventilsack und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP1935797B1
EP1935797B1 EP07033560.9A EP07033560A EP1935797B1 EP 1935797 B1 EP1935797 B1 EP 1935797B1 EP 07033560 A EP07033560 A EP 07033560A EP 1935797 B1 EP1935797 B1 EP 1935797B1
Authority
EP
European Patent Office
Prior art keywords
valve
strip
area
sheet
tube
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.)
Active
Application number
EP07033560.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1935797A1 (de
Inventor
Hans-Joachim Wichmann
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.)
Mondi AG
Original Assignee
Mondi AG
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 Mondi AG filed Critical Mondi AG
Priority to PL07033560T priority Critical patent/PL1935797T3/pl
Publication of EP1935797A1 publication Critical patent/EP1935797A1/de
Application granted granted Critical
Publication of EP1935797B1 publication Critical patent/EP1935797B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/876—Forming integral handles or mounting separate handles involving application of reinforcement strips or patches; involving reinforcements obtained by folding
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms
    • 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
    • B31B2150/0012—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom having their openings facing in the direction of movement
    • 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
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
    • 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
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B31B2160/106—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents obtained from sheets cut from larger sheets or webs before finishing the bag forming operations
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/008—Stiffening or reinforcing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/85—Applying patches or flexible valve inserts, e.g. applying film-like valves

Definitions

  • the invention relates to a method for producing a valve sack whose wall is folded into a tube and closed; Whereupon a cross-bottom is formed with side impacts and bottom flaps, wherein in a formed by the turning of the bottom flaps valve opening a closed to a valve tube, a weldable layer exhibiting valve sheet is inserted and bonded to the bottom flaps.
  • the invention further relates to a valve bag with a folded into a tube, inserted into a bottom fold valve sheet, which is provided on its inner side with a weldable coating.
  • valve sacks which have a valve tube formed from a valve tube, which is inserted into a formed during the folding of the bottom of the valve sack valve opening, is known in numerous embodiments.
  • the bottom with the inserted valve tube is generally covered and secured by a glued rectangular bottom cover sheet.
  • valve tube can remain within the valve opening, ie below the bottom cover sheet. In this case we speak of an internal valve. If the valve hose protrudes only slightly from the valve opening, this is called a stub valve. A valve tube extending beyond the gusset edge of the flattened material tube forming the bag wall is referred to as an outboard valve.
  • valve tube inserted into the valve opening allows a guided filling of the valve bag with the filling material through a filling tube of a filling machine. After filling of the valve bag, the contents push the valve tube flat together, which causes a sufficiently tight closure of the valve opening for many applications.
  • valve tube For highly dusty and / or toxic filling materials, it must be ensured that absolutely no contents escape from the interior of the valve sack after filling.
  • closure options for the valve tube There are therefore numerous closure options for the valve tube has been proposed.
  • a frequently used closure option for the valve tube consists in its welding in a flattened position after filling.
  • the valve sheet must consist of an already weldable material or have a corresponding weldable coating.
  • the material used for the valve sheet is often paper which is provided with the weldable coating.
  • the application of the weldable coating should be water based for environmental reasons. It is known to provide the valve sheet over the entire surface with a coating of an aqueous polyvinyl alcohol.
  • Such a coating of polyvinyl alcohol has the disadvantage that it becomes tacky when moistened.
  • it is therefore known to insert a protective sheet in the flat-lying valve tube.
  • the present invention has for its object to enable the production of a valve bag with a weldable valve easier to handle, in which moreover coating material can be saved.
  • the method of the type mentioned is according to the invention characterized in that the weldable layer is printed as a dispersion on the valve sheet in the form of a strip whose area occupies less than half of the surface of the valve sheet.
  • a valve bag of the type mentioned is also according to the invention characterized in that the coating is formed as an imprinted strip whose area occupies less than half of the surface of the valve sheet.
  • the weldable coating is unusually printed on the valve sheet.
  • a printing method in particular the screen printing method, a defined material application, preferably with an aqueous dispersion, can be realized in strip form on a partial surface of the valve sheet.
  • the weldable layer preferably has a basis weight of 50 g / m 2 after drying.
  • the printed strip can be designed to be very narrow and take, for example, less than 1/4 or 1/5 of the area of the valve sheet in the longitudinal direction of the valve tube.
  • the weldable layer is printed as a transverse strip on a continuously vorge arbitrtes endless belt.
  • the location of the printed strip is optically detected and used to control a separating knife for cutting the valve sheet from the continuous web.
  • the weldable material can be used in a color that contrasts with the material of the valve sheet, so that a visual recognizability is given.
  • the printed material of the weldable coating itself is optically detected.
  • “Color” is understood to be any contrasting with the material of the valve sheet manifestation.
  • An addition of a color is required when a usually transparent acrylate coating is used as the carrier.
  • the optical detection can also be done by means of a printed mark.
  • the control of the separating knife is also possible in another form, for example with an optically or mechanically detectable punching.
  • valve sheet from the continuous material makes it possible to cut off the valve sheet at the end of the printed strip so that the printed strip is positioned as a weldable layer at the outer end of the valve tube where it is best gripped for welding with appropriate welding tools can be.
  • FIG. 1 shows an endless belt of material 1 made of paper, on each of which over the entire width of a strip 2 is printed from a weldable material.
  • the printing is done by screen printing with an aqueous dispersion having a basis weight of 120 g / m 2 . After drying, a layer having a basis weight of 50 g / m 2 is formed .
  • the strips 2 point in the longitudinal direction (arrow A in FIG. 1 ) of the material strip 1 has a width which corresponds to less than 1/5 of the distance between two strips 2.
  • the printed strips 2 are detected by a photodetector 3, which controls a separating knife 4 arranged downstream of the material web 1.
  • Valve blades 5 are cut off from the endless material band 1 with the severing blade 4 such that the valve blade 5 has the material strip 2 in its full width at one end.
  • FIG. 2 Diagonal Eckeinelle 7 and bottom flaps 8 are visible, which are overlapping on intended grooves 9 are glued to each other and thus form the bottom with a valve opening between the Eckeintsch 7 on the one hand and the Bottom flaps 8 on the other hand arises.
  • FIG. 2 shows that the valve sheet 5 is placed on the still open bottom flaps so that it is foldable around fold lines 10, which are aligned with the grooves 9 of the bottom flaps 8, to a closed valve tube 11, as in FIG. 3 is shown.
  • FIG. 3 shows the bottom floor formed after folding the bottom flaps 8, to which a conventional rectangular Bodenabdeckblatt 12 is glued to secure the bonding of the bottom flaps 8 together.
  • FIG. 3 shows that the valve tube 11 protrudes laterally from the bottom cover sheet 12, but its length within the through the side edges 13 of the Hose section 6 of the valve bag formed contour remains, so here a stub valve is shown.
  • the stub valve is not quite flat lying, but somewhat oval open, so in FIG. 3 a small portion of the strip 2 of weldable material is visible.
  • valve tube 11 To attach to a filling tube with a circular or elliptical cross-section of the valve tube 11 is opened accordingly to allow filling of the valve bag. After filling the valve tube 11 is gripped in the region of the strip 2 with welding tools and welded by an appropriate power supply and thus hermetically sealed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
EP07033560.9A 2006-12-11 2007-11-17 Ventilsack und Verfahren zu seiner Herstellung Active EP1935797B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07033560T PL1935797T3 (pl) 2006-12-11 2007-11-17 Worek z zaworem i sposób jego wytwarzania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006058796A DE102006058796B3 (de) 2006-12-11 2006-12-11 Ventilsack und Verfahren zu seiner Herstellung

Publications (2)

Publication Number Publication Date
EP1935797A1 EP1935797A1 (de) 2008-06-25
EP1935797B1 true EP1935797B1 (de) 2013-12-25

Family

ID=38872076

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07033560.9A Active EP1935797B1 (de) 2006-12-11 2007-11-17 Ventilsack und Verfahren zu seiner Herstellung

Country Status (5)

Country Link
EP (1) EP1935797B1 (pl)
DE (1) DE102006058796B3 (pl)
ES (1) ES2452028T3 (pl)
PL (1) PL1935797T3 (pl)
RU (1) RU2437812C2 (pl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009036543B4 (de) 2009-08-07 2013-01-03 Segezha Packaging Gmbh Ventilblatt mit einer variierenden Beschichtung
CN106043924A (zh) * 2016-07-19 2016-10-26 河南佰嘉新型节能材料有限公司 一种防漏阀口及含有该阀口的包装袋及其制备方法
DE202017104714U1 (de) 2017-07-26 2017-11-10 Papiersackfabrik Tenax Gmbh & Co. Kg Beschichtetes Ventil für einen Ventilsack
DE102017121981A1 (de) 2017-09-22 2019-04-11 Mondi Ag Folienbeutel sowie Verfahren zur Bildung von Folienbeuteln
CN107826437B (zh) * 2017-11-30 2023-04-28 华新鄂州包装有限公司 一种防漏环保阀口袋及其制作方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1164313B (de) * 1961-03-04 1964-02-27 Juergen Klein Ventileinlage an einem Kreuzbodenventilsack aus Papier oder aus einem aehnlichen Werkstoff
DE1411857A1 (de) * 1962-02-21 1969-01-16 Windmoeller & Hoelscher Kreuzbodenventilsack mit einer schlauchfoermigen Ventileinlage aus Kunststoffolie und Verfahren zu seiner Herstellung
DE1436838A1 (de) * 1965-11-02 1969-07-10 Sessbruegger & Van Delden Papi Schlauchfoermige Ventileinlage fuer Ventilsaecke
DE3104968A1 (de) * 1979-08-13 1982-08-19 Natronag Papierproduktion Gmbh & Co, Papiersackfabriken Kg, 3380 Goslar "verfahren und vorrichtung zum verschliessen eines ventilsackes"
US4391404A (en) * 1981-08-13 1983-07-05 Champion International Corporation Sleeve valve for flexible bags
DE19544072A1 (de) * 1995-11-25 1997-05-28 Herkules Verpackung Ventilsack
FI109290B (fi) * 1997-03-18 2002-06-28 Upm Kymmene Oy Venttiilisäkki
DE19824797B4 (de) * 1998-06-03 2004-02-12 Indag Gesellschaft für Industriebedarf mbH & Co. Betriebs KG Beutelherstellungsvorrichtung und Verfahren zum Herstellen von Folienbeutel
DE102004010145A1 (de) * 2004-02-27 2005-09-15 H.C. Starck Gmbh Verformbare elektrolumineszierende Anordnung
US20060035777A1 (en) * 2004-08-13 2006-02-16 Mid-America Packaging, Llc Self-closing sealable valve bag

Also Published As

Publication number Publication date
DE102006058796B3 (de) 2008-02-14
EP1935797A1 (de) 2008-06-25
RU2437812C2 (ru) 2011-12-27
PL1935797T3 (pl) 2014-08-29
ES2452028T3 (es) 2014-03-31
RU2007145669A (ru) 2009-06-20

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