EP0564686A1 - Female closure profile for film bags and the like - Google Patents

Female closure profile for film bags and the like Download PDF

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Publication number
EP0564686A1
EP0564686A1 EP92106209A EP92106209A EP0564686A1 EP 0564686 A1 EP0564686 A1 EP 0564686A1 EP 92106209 A EP92106209 A EP 92106209A EP 92106209 A EP92106209 A EP 92106209A EP 0564686 A1 EP0564686 A1 EP 0564686A1
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EP
European Patent Office
Prior art keywords
closure profile
profile
base
shoulders
groove
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
EP92106209A
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German (de)
French (fr)
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EP0564686B1 (en
Inventor
Robert Linz
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BP Chemicals Plastec GmbH
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BP Chemicals Plastec GmbH
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Publication date
Application filed by BP Chemicals Plastec GmbH filed Critical BP Chemicals Plastec GmbH
Priority to DE59207435T priority Critical patent/DE59207435D1/en
Priority to EP19920106209 priority patent/EP0564686B1/en
Priority to IE930271A priority patent/IE75366B1/en
Publication of EP0564686A1 publication Critical patent/EP0564686A1/en
Application granted granted Critical
Publication of EP0564686B1 publication Critical patent/EP0564686B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/16End- or aperture-closing arrangements or devices
    • B65D33/25Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • AHUMAN NECESSITIES
    • A44HABERDASHERY; JEWELLERY
    • A44BBUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00Slide fasteners
    • A44B19/10Slide fasteners with a one-piece interlocking member on each stringer tape
    • A44B19/16Interlocking member having uniform section throughout the length of the stringer

Definitions

  • the invention relates to a female closure profile, which can be locked with a complementary male closure profile of a reclosable closure serving to close foil bags and the like, the closure elements of which are formed by extrusion on opposite walls of the bag, with a groove defined by fastening arms provided in particular with catch hooks for receiving the male closure profile, with a base connecting the fastening arms, with a relatively thin shaft, by means of which the base is connected to the adjacent wall of the film bag or the like, and with two shoulders, which act on the base as stop elements for limiting pivoting movements of the female closure profile are provided opposite the adjacent wall, so that the outer sides of the fastening arms, the base and the shoulders define approximately a rectangle.
  • Such a female closure profile is known from EP-A-0 223 125.
  • This known closure profile was developed on the basis of an earlier closure described in FR-A-1 438 229, in which the female profile was connected to the film material via a relatively thick shaft in order to prevent the profile from tilting when the closure is actuated and to keep the female profile at a right angle with respect to the surface of the adjacent bag wall and by a simple one Closing the closure, that is, to facilitate simple latching of the profile elements of the closure.
  • the invention has for its object to further improve the female closure profile according to EP-A-0 223 125 in such a way that, on the one hand, the material requirement for the closure profile is reduced and, on the other hand, the exposure of the adjacent film material to radiant heat from the area of the base of the closure profile is significantly reduced is reduced.
  • the amount of heat to be dissipated from the extruded closure profile is reduced from the outset in accordance with the reduction in the amount of material used, which is an important advantage in terms of production technology.
  • the shoulders project more freely outward beyond the contours of the profile, so that they can cool down quickly and are subject to only a slight deformation during the cooling process, so that they function particularly well as defined stop elements can be.
  • the design of the female closure profile according to the invention is based on the knowledge that, in contrast to the known rectangular closure profile according to EP-A 0 223 125, a relatively massive design of the base, especially in the areas adjacent to the shoulders, with a more uniform wall thickness of the base and Fastening arms are no longer required, since the bending forces when opening the profile are in this case evenly distributed over larger circumferential areas of the profile, while in the case of the fastening arms which are sharply angled with respect to the base, a concentration of the deforming forces at the foot of the fastening arms by a correspondingly massive and rigid design of the adjacent parts of the base had to be compensated.
  • the inner wall surface is rounded concavely in the area of the shoulders, since in this embodiment, on the one hand, an amount of material which stabilizes the shoulders results at the foot of the shoulders or shoulder elements, while on the other hand the free end of the male closure profile with pivoting movements inside the female closure profile is performed more reliably and evenly than this is not guaranteed to this extent in the known closure profile with a groove in the form of an approximately rectangular channel, since the free end of the male closure profile in this configuration in the corner areas of the Groove profile is no longer guided through adjacent areas of the inner wall surface of the groove.
  • the cross-section of the inner wall surface of the groove is approximately circular in cross-section.
  • the free end or the tip of the male closure profile is reliably and stabilized in every pivoting movement of the male closure profile.
  • the single drawing figure shows a female closure profile 10 according to the invention and an adjoining part of a bag wall 20 made of film material.
  • the actual closure profile comprises a base 12 and fastening arms 14 formed thereon, which are each provided with a catch hook 16 at their free ends.
  • the base 12 is connected to the film material of the bag wall 20 via a relatively thin shaft 13.
  • a shoulder 18 is provided on each of the two outer ends of the base 12 or in the transition regions of the base 12 into the fastening arms 14 formed thereon.
  • the shoulders 18 serve as stop elements for limiting pivoting movements of the female closure profile 10 relative to the bag wall 20.
  • the outer sides or the outer contours of the base 12, the fastening arms 14 and the shoulders define approximately a rectangle - in the exemplary embodiment a square - which is drawn in the drawing in the form of a dashed line 22 is.
  • the four sides of the rectangle formed by the line 22 include tangents to the outermost points of the base 12, the fastening arms 14, the shoulders 18 and the free ends of the fastening arms 14 or the inner ends of the catch hooks 16.
  • the rectangle formed by the line 22 can, on the other hand, be regarded as the outer contour of the female closure profile known from this document.
  • the dashed rectangle according to the line 22 as the contour of the known female closure profile, it immediately becomes clear that there are recesses 24 in the region of the base 12 and further recesses 26 in the transition region from the base 12 into the fastening arms 14 compared to this closure profile which extend as groove-shaped recesses 24, 26 on both sides of each of the shoulders 18 in the longitudinal direction of the female closure profile 10 over the entire length thereof.
  • a dashed line 28 is also drawn inside the profile, which indicates the course of the inner contours of the known female closure profile in the region of the groove base or the lower part of the groove.
  • the female according to the invention Closure profile in the area of the shoulders 18 on the inner wall surface of the groove is rounded off in a concave manner, such that the inner wall surface 30 of the groove is approximately circular in cross-section.
  • the cross-sectional areas of the closure profile which are omitted due to the cutouts 24, 26 compared to the prior art are shown hatched.
  • the filling of the corners at the bottom of the groove of the known profile required to round off the inner wall surface is also illustrated by hatched areas. It can be seen that the filling of the corners at the lower end of the groove in order to achieve an arc-shaped groove cross section requires the use of a certain, relatively small amount of material, but this is more than offset by the material savings in the area of the recesses 24, 26 on the outside of the profile , so that overall material savings are achieved.
  • the filling of the previously existing corners on the groove base and the rounding of the groove profile in these areas results in a considerably improved guidance of the tip of the male profile with relative pivoting movements of the female and male locking profile.
  • the recesses corresponding to the hatched fields on the underside of the base 12 facing the film 20 directly increase the distance between the profile and the film material of the bag wall 20 lead and so to a lower thermal load on the bag wall 20 due to heat radiation and because of the associated lower temperature of the film material in these areas indirectly to a faster cooling of the shaft 13 and the adjoining parts of the profile on the one hand and the film material on the other.
  • a relatively low thermal load on the film material in the region of the closure profile or a rapidly defined cooling of the closure profile itself is particularly important because a closure profile of the type considered here is generally extruded simultaneously with the film material, the film material being in particular tubular in form of a ring-shaped nozzle is extruded and then expanded by generating an overpressure inside the extruded tube until the desired wall thickness of the film is reached, it being understood that insufficient cooling of the profile parts during this blowing process or excessive heating of the film material, adjacent to it The freshly extruded profile parts, in the areas concerned, lead to an increased fluidity of the plastic material and thus to a lower wall thickness, which subsequently affects the quality of the extruded material th and inflated film material produced film bag impaired.
  • the design of the female closure profile according to the invention offers the advantages already mentioned of rapid cooling of the profile parts directly adjacent to the film material and a lower amount of heat radiation in the film areas adjacent to the shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Slide Fasteners (AREA)

Abstract

The invention relates to a female closure profile (10) for a reclosable closure for film bags and the like. Setting out from a female closure profile known from the prior art and having a substantially rectangular cross-section, according to the invention cutouts are provided on the outside of the profile in the region of the base thereof, adjoining shoulders serving as stop elements, which cutouts lead to savings of material and to lower thermal loading of the regions of the film material adjoining the profile. <IMAGE>

Description

Die Erfindung betrifft ein weibliches Verschlußprofil, welches mit einem dazu komplementären männlichen Verschlußprofil eines dem Verschließen von Folienbeuteln und dgl. dienenden wiederverschließbaren Verschlusses verrastbar ist, dessen Verschlußelemente durch Extrudieren an gegenüberliegende Wände des Beutels angeformt sind, mit einer durch insbesondere mit Fanghaken versehene Befestigungsarme definierten Nut zur Aufnahme des männlichen Verschlußprofils, mit einer die Befestigungsarme verbindenden Basis, mit einem relativ dünnen Schaft, über den die Basis mit der angrenzenden Wand des Folienbeutels oder dgl. verbunden ist, und mit zwei Schultern, die an der Basis als Anschlagelemente zur Begrenzung von Schwenkbewegungen des weiblichen Verschlußprofils gegenüber der angrenzenden Wand vorgesehen sind, so daß die Außenseiten der Befestigungsarme, der Basis und der Schultern ungefähr ein Rechteck definieren.The invention relates to a female closure profile, which can be locked with a complementary male closure profile of a reclosable closure serving to close foil bags and the like, the closure elements of which are formed by extrusion on opposite walls of the bag, with a groove defined by fastening arms provided in particular with catch hooks for receiving the male closure profile, with a base connecting the fastening arms, with a relatively thin shaft, by means of which the base is connected to the adjacent wall of the film bag or the like, and with two shoulders, which act on the base as stop elements for limiting pivoting movements of the female closure profile are provided opposite the adjacent wall, so that the outer sides of the fastening arms, the base and the shoulders define approximately a rectangle.

Ein derartiges weibliches Verschlußprofil ist aus der EP-A-0 223 125 bekannt. Dieses bekannte Verschlußprofil wurde, ausgehend von einem früheren in der FR-A-1 438 229 beschriebenen Verschluß entwickelt, bei dem das weibliche Profil über einen relativ dicken Schaft mit dem Folienmaterial verbunden war, um ein Kippen des Profils bei der Betätigung des Verschlusses zu vermeiden und das weibliche Profil unter einem rechten Winkel bezüglich der Oberfläche der angrenzenden Beutelwand zu halten und um ein einfaches Schließen des Verschlusses, das heißt ein einfaches Verrasten der Profilelemente des Verschlusses zu erleichtern. Bei dem in der EP-A-0 223 125 beschriebenen weiblichen Verschlußprofil, welches über einen relativ dünnen Schaft mit dem Folienmaterial verbunden ist, erfolgte die Sicherung gegen ein Kippen des Profils durch als Anschlagelemente dienende Schultern, wobei sich aufgrund des relativ dünnen Schaftes der Vorteil ergab, daß nur eine vergleichsweise geringe Wärmemenge über den Schaft in das angrenzende Folienmaterial fließen konnte, so daß eine unerwünschte Deformation des Folienmaterials im Profilbereich vermieden werden konnte.Such a female closure profile is known from EP-A-0 223 125. This known closure profile was developed on the basis of an earlier closure described in FR-A-1 438 229, in which the female profile was connected to the film material via a relatively thick shaft in order to prevent the profile from tilting when the closure is actuated and to keep the female profile at a right angle with respect to the surface of the adjacent bag wall and by a simple one Closing the closure, that is, to facilitate simple latching of the profile elements of the closure. In the case of the female closure profile described in EP-A-0 223 125, which is connected to the film material via a relatively thin shaft, the securing against tipping of the profile was carried out by shoulders serving as stop elements, the advantage being due to the relatively thin shaft showed that only a comparatively small amount of heat could flow into the adjacent film material via the shaft, so that undesired deformation of the film material in the profile area could be avoided.

Obwohl das weibliche Verschlußprofil gemäß EP-A-0 223 125 in der Praxis hinsichtlich der Kippsicherheit und hinsichtlich der thermischen Belastung des angrenzenden Folienmaterials wesentliche Vorteile bietet, erscheint eine weitere Verbesserung dieses Profils wünschenswert.Although the female closure profile according to EP-A-0 223 125 offers significant advantages in practice with regard to the safety against tipping and with regard to the thermal load of the adjacent film material, a further improvement of this profile seems desirable.

Im einzelnen liegt der Erfindung die Aufgabe zugrunde, das weibliche Verschlußprofil gemäß EP-A-0 223 125 dahingehend weiter zu verbessern, daß einerseits der Materialbedarf für das Verschlußprofil reduziert und andererseits die Belastung des benachbarten Folienmaterials durch Strahlungswärme aus dem Bereich der Basis des Verschlußprofils deutlich verringert wird.In particular, the invention has for its object to further improve the female closure profile according to EP-A-0 223 125 in such a way that, on the one hand, the material requirement for the closure profile is reduced and, on the other hand, the exposure of the adjacent film material to radiant heat from the area of the base of the closure profile is significantly reduced is reduced.

Diese Aufgabe wird gemäß der Erfindung bei einem weiblichen Verschlußprofil der eingangs angegebenen Art dadurch gelöst, daß an dem weiblichen Verschlußprofil, angrenzend an die beiden Längsseiten jeder der Schultern, jeweils eine rinnenförmige Aussparung vorgesehen ist.This object is achieved according to the invention in a female closure profile of the type mentioned in that a groove-shaped recess is provided on the female closure profile, adjacent to the two long sides of each of the shoulders.

Es ist ein besonderer Vorteil des weiblichen Verschlußprofils gemäß der Erfindung bzw. der rinnenförmigen Aussparungen im Basisbereich des Profils längs der daran vorgesehenen Schultern, daß gegenüber dem Verschlußprofil nach dem Stande der Technik eine Materialeinsparung erfolgt, was bei einem Massenprodukt wie einem Folienbeutel sowohl hinsichtlich der Fertigungskosten als auch bezüglich der Umweltbelastung von erheblicher Bedeutung ist.It is a particular advantage of the female closure profile according to the invention or the trough-shaped recesses in the base region of the profile along the shoulders provided thereon that there is a material saving compared to the closure profile according to the prior art, which in the case of a mass-produced product such as a film bag, both in terms of manufacturing costs as well as with regard to environmental pollution is of considerable importance.

Außerdem wird die aus dem extrudierten Verschlußprofil abzuführende Wärmemenge von vornherein entsprechend der Reduzierung der verwendeten Materialmenge verringert, was fertigungstechnisch ein wichtiger Vorteil ist.In addition, the amount of heat to be dissipated from the extruded closure profile is reduced from the outset in accordance with the reduction in the amount of material used, which is an important advantage in terms of production technology.

Weiterhin ergeben sich aufgrund der rinnenförmigen Aussparungen auf der dem Folienmaterial zugewandten Unterseite der Basis unmittelbar angrenzend an den relativ dünnen Schaft Bereiche, in denen die Wärmeabstrahlung des Verschlußprofils beim Abkühlen desselben gegenüber dem Stand der Technik verringert ist, so daß die am Schaft durch Wärmeleitung in das Folienmaterial eintretende Wärme schnell und gleichmäßig nach außen bzw. quer zum Fuß des Schaftes abgeführt werden kann.Furthermore, due to the trough-shaped recesses on the underside of the base facing the film material, immediately adjacent to the relatively thin shaft, areas arise in which the heat radiation of the closure profile when it is cooled is reduced compared to the prior art, so that the heat generated on the shaft into the Heat entering film material can be dissipated quickly and evenly to the outside or across the base of the shaft.

Darüber hinaus springen die Schultern aufgrund der an sie angrenzenden rinnenförmigen Aussparungen stärker frei nach außen über die Konturen des Profils vor, so daß sie schnell abkühlen können und während des Abkühlvorganges nur einer geringen Verformung unterliegen, so daß sie ihrer Funktion als definierte Anschlagelemente besonders gut gerecht werden können.In addition, due to the trough-shaped recesses adjoining them, the shoulders project more freely outward beyond the contours of the profile, so that they can cool down quickly and are subject to only a slight deformation during the cooling process, so that they function particularly well as defined stop elements can be.

Insgesamt basiert die erfindungsgemäße Ausgestaltung des weiblichen Verschlußprofils auf der Erkenntnis, daß, abweichend von dem bekannten rechteckigen Verschlußprofil gemäß EP-A 0 223 125, eine relativ massive Ausgestaltung der Basis speziell in den an die Schultern angrenzenden Bereichen derselben bei einer gleichmäßigeren Wandstärke von Basis und Befestigungsarmen nicht mehr erforderlich ist, da die Biegekräfte beim Öffnen des Profils in diesem Fall gleichmäßig auf größere Umfangsbereiche des Profils verteilt werden, während bei den gegenüber der Basis scharf abgewinkelten Befestigungsarmen gemäß dem Stand der Technik eine Konzentration der verformenden Kräfte am Fuß der Befestigungsarme durch eine entsprechend massive und steife Ausgestaltung der angrenzenden Teile der Basis ausgeglichen werden mußte.Overall, the design of the female closure profile according to the invention is based on the knowledge that, in contrast to the known rectangular closure profile according to EP-A 0 223 125, a relatively massive design of the base, especially in the areas adjacent to the shoulders, with a more uniform wall thickness of the base and Fastening arms are no longer required, since the bending forces when opening the profile are in this case evenly distributed over larger circumferential areas of the profile, while in the case of the fastening arms which are sharply angled with respect to the base, a concentration of the deforming forces at the foot of the fastening arms by a correspondingly massive and rigid design of the adjacent parts of the base had to be compensated.

In Ausgestaltung der Erfindung hat es sich als besonders günstig erwiesen, wenn die Innenwandfläche im Bereich der Schultern konkav abgerundet ist, da sich bei dieser Ausgestaltung einerseits am Fuß der Schultern bzw. Schulterelemente eine die Schultern insgesamt stabilisierende Materialmenge ergibt, während andererseits das freie Ende des männlichen Verschlußprofils bei Schwenkbewegungen im Inneren des weiblichen Verschlußprofils zuverlässiger und gleichmäßiger geführt wird als dies bei dem bekannten Verschlußprofil mit einer Nut in Form eines annähernd rechteckigen Kanals nicht in diesem Maße gewährleistet ist, da das freie Ende des männlichen Verschlußprofils bei dieser Ausgestaltung in den Eckbereichen des Nutprofils nicht mehr durch angrenzende Bereiche der Innenwandfläche der Nut geführt wird.In an embodiment of the invention, it has proven to be particularly advantageous if the inner wall surface is rounded concavely in the area of the shoulders, since in this embodiment, on the one hand, an amount of material which stabilizes the shoulders results at the foot of the shoulders or shoulder elements, while on the other hand the free end of the male closure profile with pivoting movements inside the female closure profile is performed more reliably and evenly than this is not guaranteed to this extent in the known closure profile with a groove in the form of an approximately rectangular channel, since the free end of the male closure profile in this configuration in the corner areas of the Groove profile is no longer guided through adjacent areas of the inner wall surface of the groove.

Insbesondere hat es sich dabei in weiterer Ausgestaltung der Erfindung als günstig erwiesen, wenn die Innenwandfläche der Nut im Querschnitt insgesamt ungefähr kreisbogenförmig getaltet ist. In diesem Fall wird nämlich das freie Ende bzw. die Spitze des männlichen Verschlußprofils bei jeder Schwenkbewegung des männlichen Verschlußprofils zuverlässig und in stets gleicher Weise stabilisierend geführt.In particular, it has proven to be advantageous in a further embodiment of the invention if the cross-section of the inner wall surface of the groove is approximately circular in cross-section. In this case, namely, the free end or the tip of the male closure profile is reliably and stabilized in every pivoting movement of the male closure profile.

Die Erfindung wird nachstehend anhand einer Zeichnung noch näher erläutert, deren einzige Figur einen vergrößerten Querschnitt durch eine bevorzugte Ausführungsform eines weiblichen Verschlußprofils gemäß der Erfindung zeigt.The invention is explained in more detail below with reference to a drawing, the single figure of which shows an enlarged cross section through a preferred embodiment of a female closure profile according to the invention.

Im einzelnen zeigt die einzige Zeichnungsfigur ein weibliches Verschlußprofil 10 gemäß der Erfindung und einen daran angrenzenden Teil einer aus Folienmaterial bestehenden Beutelwand 20.In detail, the single drawing figure shows a female closure profile 10 according to the invention and an adjoining part of a bag wall 20 made of film material.

Das eigentliche Verschlußprofil umfaßt eine Basis 12 und daran angeformte Befestigungsarme 14, die an ihren freien Enden jeweils mit einem Fanghaken 16 versehen sind. Die Basis 12 ist über einen relativ dünnen Schaft 13 mit dem Folienmaterial der Beutelwand 20 verbunden.The actual closure profile comprises a base 12 and fastening arms 14 formed thereon, which are each provided with a catch hook 16 at their free ends. The base 12 is connected to the film material of the bag wall 20 via a relatively thin shaft 13.

Ferner ist an den beiden äußeren Enden der Basis 12 bzw. in den Übergangsbereichen der Basis 12 in die daran angeformten Befestigungsarme 14 jeweils eine Schulter 18 vorgesehen. Die Schultern 18 dienen als Anschlagelemente der Begrenzung von Schwenkbewegungen des weiblichen Verschlußprofils 10 gegenüber der Beutelwand 20.Furthermore, a shoulder 18 is provided on each of the two outer ends of the base 12 or in the transition regions of the base 12 into the fastening arms 14 formed thereon. The shoulders 18 serve as stop elements for limiting pivoting movements of the female closure profile 10 relative to the bag wall 20.

Bei der in der Zeichnung gezeigten Ausgestaltung des weiblichen Verschlußprofils 10 definieren die Außenseiten bzw. die äußeren Konturen der Basis 12, der Befestigungsarme 14 und der Schultern ungefähr ein Rechteck - beim Ausführungsbeispiel ein Quadrat -, welches in der Zeichnung in Form eines gestrichelten Linienzuges 22 eingezeichnet ist. Die vier Seiten des von dem Linienzug 22 gebildeten Rechtecks umfassen dabei Tangenten an die am weitesten außen liegenden Punkte der Basis 12, der Befestigungsarme 14, der Schultern 18 und der freien Enden der Befestigungsarme 14 bzw. der inneren Enden der Fanghaken 16.In the embodiment of the female closure profile 10 shown in the drawing, the outer sides or the outer contours of the base 12, the fastening arms 14 and the shoulders define approximately a rectangle - in the exemplary embodiment a square - which is drawn in the drawing in the form of a dashed line 22 is. The four sides of the rectangle formed by the line 22 include tangents to the outermost points of the base 12, the fastening arms 14, the shoulders 18 and the free ends of the fastening arms 14 or the inner ends of the catch hooks 16.

Im Hinblick auf den Stand der Technik gemäß EP-A-0 223 123 kann das durch den Linienzug 22 gebildete Rechteck andererseits als äußere Kontur des aus dieser Druckschrift bekannten weiblichen Verschlußprofils angesehen werden. Betrachtet man aber das gestrichelt eingezeichnete Rechteck gemäß dem Linienzug 22 als Kontur des bekannten weiblichen Verschlußprofils, dann wird sofort deutlich, daß gegenüber diesem Verschlußprofil Aussparungen 24 im Bereich der Basis 12 und weitere Aussparungen 26 im Übergangsbereich von der Basis 12 in die Befestigungsarme 14 vorhanden sind, welche sich als rinnenförmige Aussparungen 24, 26 zu beiden Seiten jeder der Schultern 18 in Längsrichtung des weiblichen Verschlußprofils 10 über die gesamte Länge desselben erstrecken.With regard to the prior art according to EP-A-0 223 123, the rectangle formed by the line 22 can, on the other hand, be regarded as the outer contour of the female closure profile known from this document. However, if one considers the dashed rectangle according to the line 22 as the contour of the known female closure profile, it immediately becomes clear that there are recesses 24 in the region of the base 12 and further recesses 26 in the transition region from the base 12 into the fastening arms 14 compared to this closure profile which extend as groove-shaped recesses 24, 26 on both sides of each of the shoulders 18 in the longitudinal direction of the female closure profile 10 over the entire length thereof.

In der Zeichnung ist ferner im Inneren des Profils ein gestrichelter Linienzug 28 eingezeichnet, der den Verlauf der inneren Konturen des bekannten weiblichen Verschlußprofils im Bereich des Nutgrunds bzw. des unteren Teils der Nut andeutet. Gegenüber der inneren Kontur des bekannten Profils ist das erfindungsgemäße weibliche Verschlußprofil im Bereich der Schultern 18 an der Innenwandfläche der Nut konkav abgerundet, derart, daß die Innenwandfläche 30 der Nut insgesamt im Querschnitt etwa kreisbogenförmig gestaltet ist.In the drawing, a dashed line 28 is also drawn inside the profile, which indicates the course of the inner contours of the known female closure profile in the region of the groove base or the lower part of the groove. Compared to the inner contour of the known profile, the female according to the invention Closure profile in the area of the shoulders 18 on the inner wall surface of the groove is rounded off in a concave manner, such that the inner wall surface 30 of the groove is approximately circular in cross-section.

Zur Verdeutlichung der mit der erfindungsgemäßen Lösung erreichbaren Materialersparnisse sind die aufgrund der Aussparungen 24, 26 gegenüber dem Stand der Technik entfallenden Querschnittsflächen des Verschlußprofils schraffiert dargestellt. Die zur Abrundung der Innenwandfläche erforderliche Füllung der Ecken am Nutgrund des bekannten Profils ist ebenfalls durch schraffiert eingezeichnete Flächen verdeutlicht. Man erkennt, daß das Auffüllen der Ecken am unteren Ende der Nut zur Erzielung eines kreisbogenförmigen Nutquerschnitts den Einsatz einer gewissen, relativ geringen Materialmenge erforderlich macht, was jedoch durch die Materialeinsparungen im Bereich der Aussparungen 24, 26 auf der Außenseite des Profils mehr als ausgeglichen wird, so daß insgesamt eine Materialeinsparung erreicht wird. Außerdem ergibt sich durch das Auffüllen der bisher vorhandenen Ecken am Nutgrund und die Abrundung des Nutprofils in diesen Bereichen eine erheblich verbesserte Führung der Spitze des männlichen Profils bei relativen Schwenkbewegungen von weiblichem und männlichem Verschlußprofil.In order to clarify the material savings which can be achieved with the solution according to the invention, the cross-sectional areas of the closure profile which are omitted due to the cutouts 24, 26 compared to the prior art are shown hatched. The filling of the corners at the bottom of the groove of the known profile required to round off the inner wall surface is also illustrated by hatched areas. It can be seen that the filling of the corners at the lower end of the groove in order to achieve an arc-shaped groove cross section requires the use of a certain, relatively small amount of material, but this is more than offset by the material savings in the area of the recesses 24, 26 on the outside of the profile , so that overall material savings are achieved. In addition, the filling of the previously existing corners on the groove base and the rounding of the groove profile in these areas results in a considerably improved guidance of the tip of the male profile with relative pivoting movements of the female and male locking profile.

Anhand der zeichnerischen Darstellung der bevorzugten Ausführungsform des weiblichen Verschlußprofils gemäß der Erfindung wird ferner ohne weiteres deutlich, daß die den schraffierten Feldern entsprechenden Aussparungen an der der Folie 20 zugewandten Unterseite der Basis 12 unmittelbar zu einer Vergrößerung des Abstands zwischen dem Profil und dem Folienmaterial der Beutelwand 20 führen und damit zu einer geringeren Wärmebelastung der Beutelwand 20 durch Wärmestrahlung und wegen der damit verbundenen geringeren Temperatur des Folienmaterials in diesen Bereichen mittelbar zu einem schnelleren Abkühlen des Schaftes 13 und der daran angrenzenden Teile des Profils einerseits und des Folienmaterials andererseits.From the graphic representation of the preferred embodiment of the female closure profile according to the invention it is also readily apparent that the recesses corresponding to the hatched fields on the underside of the base 12 facing the film 20 directly increase the distance between the profile and the film material of the bag wall 20 lead and so to a lower thermal load on the bag wall 20 due to heat radiation and because of the associated lower temperature of the film material in these areas indirectly to a faster cooling of the shaft 13 and the adjoining parts of the profile on the one hand and the film material on the other.

In der Praxis sind eine relativ geringe Wärmebelastung des Folienmaterials im Bereich des Verschlußprofils bzw. ein schnelles definiertes Abkühlen des Verschlußprofils selbst deshalb besonders wichtig, weil ein Verschlußprofil der hier betrachteten Art im allgemeinen gleichzeitig mit dem Folienmaterial extrudiert wird, wobei das Folienmaterial insbesondere schlauchförmig aus einer ringförmigen Düse extrudiert wird und anschließend durch Erzeugung eines Überdruckes im Inneren des extrudierten Schlauches bis zum Erreichen der gewünschten Wandstärke der Folie ausgedehnt wird, wobei es sich versteht, daß eine ungenügende Abkühlung der Profilteile während dieses Blasvorganges bzw. eine übermäßige Erwärmung des Folienmaterials, angrenzend an die frisch extrudierten Profilteile, in den betreffenden Bereichen zu einer erhöhten Fließfähigkeit des Kunststoffmaterials und damit zu einer geringeren Wandstärke führen, welche die Qualität der anschließend aus dem extrudierten und aufgeblasenen Folienmaterial hergestellten Folienbeutel beeinträchtigt. Im Hinblick auf diese Probleme bietet die erfindungsgemäße Ausgestaltung des weiblichen Verschlußprofils die bereits erwähnten Vorteile einer schnellen Abkühlung der direkt an das Folienmaterial angrenzenden Profilteile und einer geringeren Wärmestrahlungsmenge in den an den Schaft angrenzenden Folienbereichen.In practice, a relatively low thermal load on the film material in the region of the closure profile or a rapidly defined cooling of the closure profile itself is particularly important because a closure profile of the type considered here is generally extruded simultaneously with the film material, the film material being in particular tubular in form of a ring-shaped nozzle is extruded and then expanded by generating an overpressure inside the extruded tube until the desired wall thickness of the film is reached, it being understood that insufficient cooling of the profile parts during this blowing process or excessive heating of the film material, adjacent to it The freshly extruded profile parts, in the areas concerned, lead to an increased fluidity of the plastic material and thus to a lower wall thickness, which subsequently affects the quality of the extruded material th and inflated film material produced film bag impaired. In view of these problems, the design of the female closure profile according to the invention offers the advantages already mentioned of rapid cooling of the profile parts directly adjacent to the film material and a lower amount of heat radiation in the film areas adjacent to the shaft.

Claims (3)

Weibliches Verschlußprofil, welches mit einem dazu komplementären männlichen Verschlußprofil eines dem Verschließen von Folienbeuteln und dgl. dienenden wiederverschließbaren Verschlusses verrastbar ist, dessen Verschlußelemente durch Extrudieren an gegenüberliegende Wände des Beutels angeformt sind, mit einer durch insbesondere mit Fanghaken versehene Befestigungsarme definierten Nut zur Aufnahme des männlichen Verschlußprofils, mit einer die Befestigungsarme verbindenden Basis, mit einem relativ dünnen Schaft, über den die Basis mit der angrenzenden Wand des Folienbeutels oder dgl. verbunden ist, und mit zwei Schultern, die an der Basis als Anschlagelemente zur Begrenzung von Schwenkbewegungen des weiblichen Verschlußprofils gegenüber der angrenzenden Wand vorgesehen sind, so daß die Außenseiten der Befestigungsarme, der Basis und der Schultern ungefähr ein Rechteck definieren, dadurch gekennzeichnet, daß an dem weiblichen Verschlußprofil (10), angrenzend an die beiden Längsseiten jeder der Schultern (18), jeweils eine rinnenförmige Aussparung (24, 26) vorgesehen ist.Female closure profile, which can be latched with a complementary male closure profile of a reclosable closure serving to seal foil bags and the like, the closure elements of which are molded by extrusion onto opposite walls of the bag, with a groove for receiving the male, which is defined by fastening arms provided in particular with catch hooks Closure profile, with a base connecting the fastening arms, with a relatively thin shaft, by means of which the base is connected to the adjacent wall of the film bag or the like, and with two shoulders, which act on the base as stop elements to limit pivoting movements of the female closure profile the adjacent wall are provided so that the outer sides of the fastening arms, the base and the shoulders define approximately a rectangle, characterized in that on the female closure profile (10), adjacent to the a groove-shaped recess (24, 26) is provided on both long sides of each of the shoulders (18). Weibliches Verschlußprofil nach Anspruch 1, dadurch gekennzeichnet, daß die Innenwandfläche (30) der Nut im Bereich der Schultern (18) konkav abgerundet ist.Female closure profile according to claim 1, characterized in that the inner wall surface (30) of the groove is concavely rounded in the area of the shoulders (18). Weibliches Verschlußprofil nach Anspruch 2, dadurch gekennzeichnet, daß die Innenwandfläche (30) der Nut im Querschnitt ungefähr kreisbogenförmig gestaltet ist.Female closure profile according to claim 2, characterized in that the inner wall surface (30) of the groove has an approximately circular arc shape in cross section.
EP19920106209 1992-04-10 1992-04-10 Female closure profile for film bags and the like Expired - Lifetime EP0564686B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59207435T DE59207435D1 (en) 1992-04-10 1992-04-10 Female closure profile for foil bags and the like
EP19920106209 EP0564686B1 (en) 1992-04-10 1992-04-10 Female closure profile for film bags and the like
IE930271A IE75366B1 (en) 1992-04-10 1993-04-06 Female closure profile for film bags and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19920106209 EP0564686B1 (en) 1992-04-10 1992-04-10 Female closure profile for film bags and the like

Publications (2)

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EP0564686A1 true EP0564686A1 (en) 1993-10-13
EP0564686B1 EP0564686B1 (en) 1996-10-23

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EP19920106209 Expired - Lifetime EP0564686B1 (en) 1992-04-10 1992-04-10 Female closure profile for film bags and the like

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EP (1) EP0564686B1 (en)
DE (1) DE59207435D1 (en)
IE (1) IE75366B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1438229A (en) * 1964-09-10 1966-05-13 Flexico France Sarl Improvements made to containers or bags with incorporated closure
EP0223125A1 (en) * 1985-11-04 1987-05-27 Flexico France S.A.R.L. Stabilized reclosable extruded plastic fasteners

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1438229A (en) * 1964-09-10 1966-05-13 Flexico France Sarl Improvements made to containers or bags with incorporated closure
EP0223125A1 (en) * 1985-11-04 1987-05-27 Flexico France S.A.R.L. Stabilized reclosable extruded plastic fasteners

Also Published As

Publication number Publication date
IE75366B1 (en) 1997-08-27
EP0564686B1 (en) 1996-10-23
IE930271A1 (en) 1993-10-20
DE59207435D1 (en) 1996-11-28

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