EP0710607A1 - Packaging bag with pressure relief valve - Google Patents

Packaging bag with pressure relief valve Download PDF

Info

Publication number
EP0710607A1
EP0710607A1 EP95115686A EP95115686A EP0710607A1 EP 0710607 A1 EP0710607 A1 EP 0710607A1 EP 95115686 A EP95115686 A EP 95115686A EP 95115686 A EP95115686 A EP 95115686A EP 0710607 A1 EP0710607 A1 EP 0710607A1
Authority
EP
European Patent Office
Prior art keywords
hole
wall
packaging bag
relief valve
pressure relief
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
EP95115686A
Other languages
German (de)
French (fr)
Other versions
EP0710607B1 (en
Inventor
Klaus Dr. Domke
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0710607A1 publication Critical patent/EP0710607A1/en
Application granted granted Critical
Publication of EP0710607B1 publication Critical patent/EP0710607B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element

Abstract

The packaging bag is made of thermoplastic sheet or compound sheeting with at least one thermoplastic layer. The wall of the bag has a hole covered by the excess pressure valve stuck to the outside of the wall. The edge round the hole is in the form of a thicker part (15) of the wall and is formed by banking up a thermoplastic layer (11) fused and displaced near the hole. The thicker part incorporates burst parts (17,18) of other layers (12,13) of the composite material forming the wall of the bag.

Description

Stand der TechnikState of the art

Die Erfindung betrifft einen Verpackungsbeutel mit Überdruckventil nach dem Oberbegriff des Anspruchs 1. Verpackungsbeutel mit Überdruckventil werden zum Verpacken von gasabgebendem Inhalt, beispielsweise Kaffee, verwendet, der über eine längere Zeit nach dem Rösten Kohlendioxid erzeugt. An der Außenwand des dicht verschlossenen Beutels ist, um ein Eindringen von Luftsauerstoff in den Beutel zu verhindern, ein aus Folien aufgebautes, beispielsweise aus der EP-A-0 023 703 bekanntes Überdruckventil aufgeklebt, das eine Perforation in Form eines Loches oder Durchbruches in der Beutelwand überdeckt. Das Loch ist, wie beispielsweise die EP-A-0 024 310 zeigt, aus einem bogenförmigen Schlitz oder aus mehreren, beispielsweise neun im Quadrat angeordneten, feinen Nadelstichen gebildet. Bei Packungen mit Kleinmengen bis zu 500g Kaffee ist die bekannte Ausbildung des Loches für den Gasdurchtritt ausreichend. Bei Mengen insbesondere über 2000g ist sein Querschnitt jedoch zu klein. Naheliegend ist, das Loch durch Ausstanzen einer Ronde mit einem Durchmesser von 2 bis 3 Millimeter herzustellen. Dabei kann mitunter die ausgestanzte Ronde als Abfall im Beutelinneren verbleiben, was unbedingt zu vermeiden ist.The invention relates to a packaging bag with a pressure relief valve according to the preamble of claim 1. Packaging bags with a pressure relief valve are used for packaging gas-releasing contents, for example coffee, which produces carbon dioxide over a long period after roasting. In order to prevent atmospheric oxygen from penetrating into the bag, a pressure relief valve constructed from foils, for example known from EP-A-0 023 703, is glued to the outer wall of the bag, which has a perforation in the form of a hole or opening in the Bag wall covered. As shown, for example, by EP-A-0 024 310, the hole is formed from an arcuate slot or from several, for example nine, fine needle stitches arranged in a square. In the case of packs with small quantities of up to 500 g of coffee, the known design of the hole is sufficient for the gas to pass through. However, its cross section is too small for quantities above 2000 g. It is obvious to make the hole by punching out a circular blank with a diameter of 2 to 3 millimeters. Sometimes the punched round blanks remain as waste inside the bag, which must be avoided.

Aufgabe der Erfindung ist es, das vom Überdruckventil überdeckte Loch in der Beutelwand mit einem ausreichend großen Durchlaßquerschnitt auszubilden und ihm eine stabile Begrenzung zu geben.The object of the invention is to form the hole in the bag wall covered by the pressure relief valve with a sufficiently large passage cross section and to give it a stable limitation.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemäße Verpackungsbeutel mit Überdruckventil mit dem kennzeichnenden Merkmal des Anspruchs 1 hat demgegenüber der Vorteil, daß die gegenüber der Umgebung steifere Verdickung gewährleistet, daß sich Teile der Umgebung nicht in das Loch zurückziehen und somit dessen Durchlaßquerschnitt wieder verringern. Dies ist von Vorteil bei aus einer Mehrschichtfolie gefertigten Beuteln, da Teile der nicht thermoplastischen Schicht oder Schichten von der steifen Verdickung fixiert werden.The packaging bag according to the invention with a pressure relief valve with the characterizing feature of claim 1 has the advantage that the thickening which is more rigid than the environment ensures that parts of the environment do not retract into the hole and thus reduce its passage cross section again. This is advantageous in the case of bags made from a multilayer film, since parts of the non-thermoplastic layer or layers are fixed by the rigid thickening.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Verpackungsbeutels möglich.The measures listed in the subclaims allow advantageous developments and improvements of the packaging bag specified in claim 1.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen Verpackungsbeutel mit Überdruckventil vereinfacht in schaubildlicher Ansicht und Figur 2 das Durchgangsloch des Verpackungsbeutels im Querschnitt in stark vergrößertem Maßstab.An embodiment of the invention is shown in the drawing and is explained in more detail in the following description. Figure 1 shows a packaging bag with pressure relief valve simplified in a diagrammatic view and Figure 2 shows the through hole of the packaging bag in cross section on a greatly enlarged scale.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Eine kissenförmige Beutelpackung, bei der in einem Beutel 1 aus einer flexiblen Packstoffolie frisch gerösteter Kaffee verpackt ist, hat, um ein Platzen des dicht verschlossenen Beutels 1 zu verhindern, beispielsweise in seiner Vorderwand 2 ein Durchgangsloch 3, das mit einem an sich bekannten, auf die Außenseite der Vorderwand 2 über dem Loch 3 dicht aufgeklebten, flachen Überdruckventil 5 verschlossen ist. Bei durch Abgabe von Kohlendioxidgas aufgebautem Überdruck im Packungsinneren öffnet das Überdruckventil 5, so daß Gas abströmen kann.A pillow-shaped bag pack, in which freshly roasted coffee is packed in a bag 1 made of a flexible packaging material film, has a through hole 3, for example in its front wall 2, to prevent the tightly sealed bag 1 from bursting the outside of the front wall 2 is sealed over the hole 3, glued on flat pressure relief valve 5. When excess pressure builds up in the interior of the package due to the release of carbon dioxide gas, the excess pressure valve 5 opens, so that gas can flow out.

Der Beutel 1 ist aus einer thermoplastischen Kunststoffolie, vorzugsweise aus einer Mehrschichtfolie geformt, die eine innere Schicht 11 aus einem thermoplastischen Kunststoff, beispielsweise Polyethylen (PE), eine mittlere, die Gasdichtigkeit gewährleistende dünne Schicht 12, beispielsweise eine Aluminiumfolie, und eine dünne äußere Schicht 13 aus Kunststoff, beispielsweise Polyropylen (PETP) aufweist. Das vom Überdruckventil 5 verschlossene Loch 3, das einen Durchmesser von 2 bis 3 Millimeter hat, ist von einem eine Verdickung bildenden Ringwall 15 begrenzt. Dieser Ringwall 15 ist durch Aufstauen von thermoplastischem Material im wesentlichen der inneren Schicht 11 gebildet, das im Bereich des Loches 3 aufgeschmolzen und in den Randbereich 16 verdrängt worden ist. In dem Ringwall 15 sind Fransen 17, 18 der im Bereich des Lochs 3 geborstenen mittleren Schicht 12 und der äußeren Schicht 13 eingebettet oder gebunden.The bag 1 is formed from a thermoplastic film, preferably from a multilayer film, which has an inner layer 11 made of a thermoplastic material, for example polyethylene (PE), a middle thin layer 12, for example an aluminum film, which ensures gas-tightness, and a thin outer layer 13 made of plastic, for example polyropylene (PETP). The hole 3 closed by the pressure relief valve 5, which has a diameter of 2 to 3 millimeters, is delimited by an annular wall 15 forming a thickening. This ring wall 15 is formed essentially by the accumulation of thermoplastic material in the inner layer 11, which has been melted in the area of the hole 3 and displaced into the edge area 16. Fringes 17, 18 of the middle layer 12 and the outer layer 13 burst in the region of the hole 3 are embedded or bound in the ring wall 15.

Das Loch 3 mit dem es umgebenden Ringwall 15 wird durch Stechen mit einer auf etwa 250 bis 300 Grad Celcius beheizten Nadel 20 geformt. Beim Einstechen der Nadel 20 in die Wand 2 von deren Innenseite her schmilzt der mit der Nadel 20 in Kontakt kommende Materialbereich der inneren thermoplastischen Schicht 11 auf und zieht sich radial zurück bzw. wird verdrängt, so daß sich der Ringwall 15 als verdickte Begrenzung des Lochs 3 ausbildet. Die im Lochbereich nicht geschmolzene mittlere Schicht 12 und äußere Schicht 13 berstet zu Fransen 17, 18, die teils vom aufgeschmolzenen Material der inneren Schicht 11 aufgenommen, teils eingebunden werden, so daß sie beim Zurückziehen der Nadel 20 nicht in den Lochbereich zurückfedern können, der Querschnitt des Lochs 3 somit in seiner Größe erhalten bleibt.The hole 3 with the ring wall 15 surrounding it is formed by piercing with a needle 20 heated to approximately 250 to 300 degrees Celsius. When the needle 20 is inserted into the wall 2 from the inside thereof, the material area of the inner material which comes into contact with the needle 20 melts thermoplastic layer 11 and retracts radially or is displaced, so that the annular wall 15 is formed as a thickened boundary of the hole 3. The middle layer 12 and outer layer 13, which is not melted in the hole area, bursts into fringes 17, 18, which are partly absorbed by the melted material of the inner layer 11 and partly bound in, so that they cannot spring back into the hole area when the needle 20 is withdrawn Cross section of the hole 3 is thus retained in size.

Claims (3)

Verpackungsbeutel (1) mit einem Überdruckventil (5), wobei der Verpackungsbeutel (5) aus einer thermoplastischen Kunststoffolie oder aus einer aus mehreren, wenigstens eine thermoplastische Schicht aufweisenden Verbundfolie besteht, und das Überdruckventil (5) ein Loch (3) in einer Wandung (2) des Verpackungsbeutels (1) verschließend abdeckt und auf der Außenseite der Wandung (2) verklebt ist, dadurch gekennzeichnet, daß der das Loch (3) begrenzende Rand der Wandung (2) als Verdickung (15) ausgebildet ist.Packaging bag (1) with a pressure relief valve (5), wherein the packaging bag (5) consists of a thermoplastic plastic film or of a composite film having at least one thermoplastic layer, and the pressure relief valve (5) has a hole (3) in a wall ( 2) covering the packaging bag (1) and sealingly glued to the outside of the wall (2), characterized in that the edge of the wall (2) delimiting the hole (3) is designed as a thickening (15). Verpackungsbeutel nach Anspruch 1, dadurch gekennzeichnet, daß die Verdickung (15) durch Aufstauen einer im Bereich des Lochs (3) geschmolzenen und verdrängten thermoplastischen Schicht (11) gebildet ist.Packaging bag according to claim 1, characterized in that the thickening (15) is formed by accumulating a thermoplastic layer (11) melted and displaced in the region of the hole (3). Verpackungsbeutel nach Anspruch 2, dadurch gekennzeichnet, daß in der Verdickung (15) geborstene Teile (17, 18) anderer Schichten (12, 13) der aus einem Verbundmaterial bestehenden Wandung (2) des Verpackungsbeutels (1) fest eingebettet sind.A packaging bag according to claim 2, characterized in that parts (17, 18) of other layers (12, 13) of the wall (2) of the packaging bag (1) made of a composite material are firmly embedded in the thickening (15).
EP95115686A 1994-11-03 1995-10-05 Packaging bag with pressure relief valve Expired - Lifetime EP0710607B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9417621U DE9417621U1 (en) 1994-11-03 1994-11-03 Packaging bag with pressure relief valve
DE9417621U 1994-11-03

Publications (2)

Publication Number Publication Date
EP0710607A1 true EP0710607A1 (en) 1996-05-08
EP0710607B1 EP0710607B1 (en) 1998-07-22

Family

ID=6915648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115686A Expired - Lifetime EP0710607B1 (en) 1994-11-03 1995-10-05 Packaging bag with pressure relief valve

Country Status (3)

Country Link
EP (1) EP0710607B1 (en)
DE (2) DE9417621U1 (en)
ES (1) ES2118489T3 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1809578A1 (en) * 1968-11-18 1970-07-30 Windmoeller & Hoelscher Sack or pouch made of plastic film with ventilation and / or ventilation through perforations
DE2802849A1 (en) * 1977-01-26 1978-07-27 Intermas Sa PLASTIC BAG
EP0023703A1 (en) 1979-08-06 1981-02-11 Robert Bosch Gmbh Pressure relief valve for packing containers
EP0024310A1 (en) 1979-08-16 1981-03-04 Robert Bosch Gmbh Packaging container with pressure relief valve
DE3618829A1 (en) * 1986-06-04 1987-12-10 Bosch Gmbh Robert Packaging container with overpressure valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1809578A1 (en) * 1968-11-18 1970-07-30 Windmoeller & Hoelscher Sack or pouch made of plastic film with ventilation and / or ventilation through perforations
DE2802849A1 (en) * 1977-01-26 1978-07-27 Intermas Sa PLASTIC BAG
EP0023703A1 (en) 1979-08-06 1981-02-11 Robert Bosch Gmbh Pressure relief valve for packing containers
EP0024310A1 (en) 1979-08-16 1981-03-04 Robert Bosch Gmbh Packaging container with pressure relief valve
DE3618829A1 (en) * 1986-06-04 1987-12-10 Bosch Gmbh Robert Packaging container with overpressure valve

Also Published As

Publication number Publication date
ES2118489T3 (en) 1998-09-16
DE9417621U1 (en) 1996-03-07
DE59502880D1 (en) 1998-08-27
EP0710607B1 (en) 1998-07-22

Similar Documents

Publication Publication Date Title
DE3413352C2 (en)
DE1903048B2 (en) VALVE ON A FLEXIBLE, AIR-TIGHTLY SEALED PACKAGING CONTAINER
DE1949723C2 (en) Multi-layer flexible foil pouch, especially for tobacco
WO1991019653A1 (en) Flexible plastic receptacle for fastening to a rigid contact surface and process for fastening the receptacle to a rigid contact surface
DE2055654A1 (en) pack
DE10115936C2 (en) cigarette pack
DE60009062T2 (en) Refill container for food and device for holding such a container
DE3726162A1 (en) PACKAGING CONTAINER WITH Tear-off device
DE3731277A1 (en) PACKAGE FOR FOODSTUFFS AND METHOD FOR THE PRODUCTION THEREOF
DE1166453B (en) Method of making a sealed container, e.g. B. a bag or a can or a cup, with an easy-to-open weakening line
DE202012012673U1 (en) Cover made of film material for a product
EP2752371B1 (en) Valve bag
DE202014010715U1 (en) Packaging container for bulk goods
WO1988007479A1 (en) Packaging receptacle with gas outlet vent
EP3310693B1 (en) Capsule for preparation of beverages
DE3621813A1 (en) FLEXIBLE SHEET BAG
DE202020005896U1 (en) Capsule for making a drink
EP1205393B1 (en) Can end and manufacturing method therefor
DE3721675A1 (en) Coiled bag or pouch made of thermoplastic film material for packaging, for example, tobacco
EP0710607A1 (en) Packaging bag with pressure relief valve
EP1882637B1 (en) Packing container
DE2526975B2 (en) PLASTIC FLOOR BAG
DE2808372A1 (en) PROCESS FOR THE AUTOMATIC PRODUCTION OF DRINKING CUP PACKS
EP2939583A1 (en) Method and device for producing a vacuum cleaner bag and vacuum cleaner bag
DE3407688C2 (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR IT LI

17P Request for examination filed

Effective date: 19961108

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19971103

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR IT LI

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SCINTILLA AG, DIREKTION

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59502880

Country of ref document: DE

Date of ref document: 19980827

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2118489

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19991022

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010629

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20011017

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20011019

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20011211

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021006

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20021031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030501

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20031112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051005