EP0291457B2 - One-piece hinged snap-on cap - Google Patents

One-piece hinged snap-on cap Download PDF

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Publication number
EP0291457B2
EP0291457B2 EP88810296A EP88810296A EP0291457B2 EP 0291457 B2 EP0291457 B2 EP 0291457B2 EP 88810296 A EP88810296 A EP 88810296A EP 88810296 A EP88810296 A EP 88810296A EP 0291457 B2 EP0291457 B2 EP 0291457B2
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EP
European Patent Office
Prior art keywords
hinge
straps
closure
closed position
piece snap
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.)
Expired - Lifetime
Application number
EP88810296A
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German (de)
French (fr)
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EP0291457A3 (en
EP0291457B1 (en
EP0291457A2 (en
Inventor
Werner F. Dubach
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Medisize Schweiz AG
Original Assignee
Createchnic AG
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Application filed by Createchnic AG filed Critical Createchnic AG
Priority to AT88810296T priority Critical patent/ATE56412T1/en
Publication of EP0291457A2 publication Critical patent/EP0291457A2/en
Publication of EP0291457A3 publication Critical patent/EP0291457A3/en
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    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/08—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures
    • B65D47/0804—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage
    • B65D47/0809—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage and elastically biased towards both the open and the closed positions
    • B65D47/0814—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage and elastically biased towards both the open and the closed positions by at least three hinge sections, at least one having a length different from the others

Definitions

  • the present invention relates to a one-piece snap hinge closure made of plastic with a lower part and a cap, both parts each having a jacket wall. When the closure is closed, these jacket walls are congruently vertically one above the other.
  • the lower part is connected to the cap by at least one film hinge and by two tensioning straps arranged on either side of the film hinge, which are stretched when the closure is closed.
  • a snap hinge closure of the type mentioned at the outset is known, for example, from EP-A 0 147 423.
  • the straps of the known solution are usually attached to sprues that are placed on the outer surface and lie in a plane that cuts the plastic closure like a secant. From the point of view of effectiveness, strength and closing force, these closures have proven their worth.
  • the aesthetic appearance and the processability of the closures in the filling stations were the main concerns in the market.
  • the above straps occasionally caused blockages on the conveyor line.
  • a snap hinge closure is known in which the tensioning straps are hinged to the jacket walls via film hinges, the approaches of the tensioning straps running in parallel planes to the main hinge.
  • snap hinge closure is known in which a single strap is provided, which is articulated in niches and is arched in the open state.
  • the material thickness in the area of a film hinge is only 0.1-0.2 mm. This leads to a directional orientation during the spraying process of macromolecules in the film hinge area. In areas in which the macromolecules are directionally oriented, they only tolerate small forces transversely to the direction of travel, as occur in the embodiment according to the invention mentioned above. In contrast, the material thickness in a strap is approx.
  • a closure marketed by the company Zeller USA GmbH has stretched straps in the open state, which are hinged to the upper and lower parts via film hinges.
  • the lower part of the one-piece snap hinge closure is denoted by 1, the upper part connected to it by 2.
  • the snap hinge is integrated in a lock in the form shown.
  • the illustrated embodiment according to the principle of the invention is a closure in which the lower closure part 1 is fastened on a tube T.
  • the upper part 2 is a cap in this case.
  • the two parts 1 and 2 of the closure are connected to one another via a conventional film hinge 3, which protrudes slightly beyond the peripheral jacket wall.
  • the coat wall 4 of the lower part 1 and the outer wall 5 of the cap and the upper part 2 are vertically one above the other.
  • an indentation 8 is provided in the upper and lower part, which should facilitate the opening of the closure.
  • the two tensioning straps 6 are almost only partially recognizable. They are integrated in the lateral surfaces 4 and 5 in such a way that only the lateral boundaries 7 can still be seen. Apart from minor deviations, the outer surfaces of the tensioning straps 6 are aligned with the outer surfaces of the upper and lower parts 1, 2.
  • FIG. 4 shows the same exemplary embodiment of the snap hinge on the closure according to FIGS. 1-3 in the fully open position on a larger scale.
  • the lower part 1 has a cover surface 9, which rises above the parting plane E of the upper and lower part 1, 2 and has a conical spout 10.
  • the tensioning straps 6 are untensioned in this position and form an arc. Since the tensioning straps lie on the periphery of the curved jacket surfaces here, the tensioning straps are curved more strongly in the area closer to the film hinge than the areas further away from the film hinge. Therefore, the tensioning strap is visible in the side view with a double arch. Also in the view according to FIG. 5, which shows a top view of the closure according to FIG.
  • FIG. 7 a section along the line C - C in FIG. 5.
  • the niches 11 in which the tensioning straps are attached in which the tensioning straps are attached.
  • the niches in the cap or the upper part 2 do not break through the jacket wall 5, but leave a minimal wall thickness required, so that in the closed state of the closure the upper part and lower part rest on one another over the entire circumference of the jacket walls.
  • the straps 6 from the starting point in the niches 11 have at least approximately the same cross-sectional area over their entire length.
  • the straps can be rounded and thickened at the base in order to avoid a notch effect.
  • the cross-sectional area remains the same apart from inaccuracies.
  • the cross-sectional shape of the straps 6 can be designed very differently. This is shown by the examples in FIGS. 8a and b. So the outer surface can be adapted exactly to the contour of the jacket wall, but the inner surface can be straight. ( Figure 8a) But in addition to the purely rectangular shape as can be seen in FIG. 6, an all-round convex shape, for example an ellipse as in FIG. 8b, would also be possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Supports Or Holders For Household Use (AREA)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Dowels (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Hinges (AREA)
  • Supports For Pipes And Cables (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)

Abstract

A snap hinge closure connects two parts, such as, for example, a lower and an upper part of a closure. Both parts have casing walls which, in the closed position of the hinge, match vertically above one another. On both sides of the film hinge, tension bands are positioned, which, in the closed position, are tensed. The tension bands are held, with their ends, in recesses (11) in the casing walls, and have, over their entire length, an approximately uniform cross section. The outermost surfaces of the tension bands align with the casing external surfaces.

Description

Die vorliegende Erfindung betrifft einen einteiligen Schnappscharnierverschluss aus Kunststoff mit einem Unterteil und einer Kappe, wobei beide Teile je eine Mantelwand aufweisen. Im geschlossenen Zustand des Verschlusses stehen diese Mantelwände deckungsgleich vertikal übereinander. Der Unterteil ist mit der Kappe über mindestens ein Filmscharnier sowie über zwei je beidseits des Filmscharnieres angeordnete Spannbänder verbunden, die im geschlossenen Zustand des Verschlusses gestreckt sind.The present invention relates to a one-piece snap hinge closure made of plastic with a lower part and a cap, both parts each having a jacket wall. When the closure is closed, these jacket walls are congruently vertically one above the other. The lower part is connected to the cap by at least one film hinge and by two tensioning straps arranged on either side of the film hinge, which are stretched when the closure is closed.

Lösungsvorschläge, um die Federelemente, beziehungsweise Scharnierteile eines Schnappscharniers möglichst anliegend zu gestalten, sind aus der DE-C 589 647, DE-A 3 026 436 bekannt geworden. Gemäss der US-A 3 964 609 wird gar das Federelement separat gefertigt und in eine Aussparung parallel der Aussenwand des Behälters eingeschoben.Proposed solutions to make the spring elements or hinge parts of a snap hinge as close as possible are known from DE-C 589 647, DE-A 3 026 436. According to US Pat. No. 3,964,609, the spring element is even manufactured separately and inserted into a recess parallel to the outer wall of the container.

Ein Schnappscharnierverschluss der eingangs genannten Art ist beispielsweise aus der EP-A 0 147 423 bekannt. Die Spannbänder der bekannten Lösung sind üblicherweise an Angüssen befestigt, die auf der äusseren Mantelfläche aufgesetzt sind und in einer Ebene liegen, die den Kunststoffverschluss wie eine Sekante schneidet. Von der Wirkungsweise, der Festigkeit und der Schliesskraft her gesehen haben sich diese Verschlüsse bestens bewährt. Bernängelt wurden auf dem Markt vor allem das ästhetische Aussehen sowie die Verarbeitbarkeit der Verschlüsse in den Abfüllstationen. Die vorstehenden Spannbänder boten gelegentlich Anlass zu Verstopfungen auf der Förderstrecke.A snap hinge closure of the type mentioned at the outset is known, for example, from EP-A 0 147 423. The straps of the known solution are usually attached to sprues that are placed on the outer surface and lie in a plane that cuts the plastic closure like a secant. From the point of view of effectiveness, strength and closing force, these closures have proven their worth. The aesthetic appearance and the processability of the closures in the filling stations were the main concerns in the market. The above straps occasionally caused blockages on the conveyor line.

Eine Lösung für das zweitgenannte Problem ist in der EP-A 056 469 dargestellt. Hier wird anstelle der Spannbänder mit seitlich dem Filmscharniergelenk angeordneten Zwischenelementen gearbeitet, die an und für sich dickwandig sind und über Filmscharniere mit dem Unterteil bzw. der Kappe verbunden sind. Die zur Schnappwirkung erforderliche Kraft wird hier nicht durch Längsdehnung der Zwischenelemente, sondern durch die Rückformkraft der gewölbt geformten Zwischenelemente gebildet. Die beim Oeffnen und Schliessen des Verschlusses auftretenden Zugkräfte verlaufen durch die Filmscharniere, an denen die Zwischenelemente mit der Kappe bzw. dem Unterteil verbunden sind. Das die Schwenkachse bildende Filmscharnier wird beim Oeffnen des Verschlusses gestaucht. Während die Stauchung eines Filmscharniers unproblematisch ist, stellen Zugkräfte über einem Filmscharnier eine grosse Gefahr dar. Verlaufen die Zugkräfte exakt in der Verlaufrichtung senkrecht zur Achse des Filmscharniers, so ist die Widerstandskraft noch relativ gross. Bei einer Schrägstellung der Filmscharniere, wie dies die EP-A 056 469 verlangt, ist jedoch die vorgenannte korrekte Krafteinwirkung nicht gewährleistet. Das Resultat ist, dass an den Seiten der Filmscharniere eine Ueberdehnung mit Kerbwirkung auftritt und die Filmscharniere reissen.A solution to the second problem is presented in EP-A 056 469. Instead of the tensioning straps, intermediate elements are arranged at the side of the film hinge joint, which are thick-walled per se and are connected to the lower part or the cap via film hinges. The force required for the snap action is not formed here by the longitudinal expansion of the intermediate elements, but by the restoring force of the curved intermediate elements. The tensile forces that occur when opening and closing the closure run through the film hinges, on which the intermediate elements are connected to the cap or the lower part. The film hinge forming the pivot axis is compressed when the lock is opened. While the compression of a film hinge is not a problem, tensile forces over a film hinge pose a great danger. If the tensile forces run exactly in the direction perpendicular to the axis of the film hinge, the resistance is still relatively large. With an inclined position of the film hinges, as required by EP-A 056 469, the aforementioned correct force is not guaranteed. The result is that a notch overextension occurs on the sides of the film hinges and the film hinges tear.

Aus der US 4'545'495 ist ein Schnappscharnierverschluss bekannt bei dem die Spannbänder über Filmscharniere an den Mantelwänden angelenkt ist, wobei die Ansatze der Spannbänder in parallelen Ebenen zum Hauptscharnierverlaufen. Aus der DE-U-85 36 556 ist Schnappscharnierverschluss bekannt bei dem ein einziger Spannband vorgesehen ist, welches in Nischen angelenkt ist und im offenen Zustand gewölbt verläuft.
Die Materialdicke im Bereich eines Filmscharniers beträgt lediglich 0,1 - 0,2 mm. Dies führt während des Spritzvorganges zu einer Richtungsorientierung der Makromoleküle im Filmscharnierbereich. In Bereichen in denen die Makromoleküle richtungsorientiert sind, vertragen diese nur geringe Kräfte quer zur Verlaufsrichtung, wie sie in der Ausführung gemäss der obgenannten Erfindung auftreten. Demgegenüber ist die Materialdicke in einem Spannband mit ca. 0,5 - 0,8 mm 4- bis 5fach grösser. Eine Richtungsorientierung der Makromoleküle beim Spritzvorgang findet hier nicht statt. Die Richtung der Kräfteeinwirkung auf die Spannbänder ist somit unwesentlich. Zudem bestimmt die Grösse der Oeffnungen in der Spritzform, durch die das Material immer vom Unterteil in die Kappe strömt, die Spritztaktzeit.From US 4,545,495 a snap hinge closure is known in which the tensioning straps are hinged to the jacket walls via film hinges, the approaches of the tensioning straps running in parallel planes to the main hinge. From DE-U-85 36 556 snap hinge closure is known in which a single strap is provided, which is articulated in niches and is arched in the open state.
The material thickness in the area of a film hinge is only 0.1-0.2 mm. This leads to a directional orientation during the spraying process of macromolecules in the film hinge area. In areas in which the macromolecules are directionally oriented, they only tolerate small forces transversely to the direction of travel, as occur in the embodiment according to the invention mentioned above. In contrast, the material thickness in a strap is approx. 0.5 - 0.8 mm 4 to 5 times larger. A directional orientation of the macromolecules during the spraying process does not take place here. The direction of the forces acting on the tensioning straps is therefore immaterial. The size of the openings in the injection mold, through which the material always flows from the lower part into the cap, determines the spray cycle time.

Ein von der Firma Zeller Plastik GmbH auf den Markt gebrachter Verschluss weist im offenen Zustand gestreckte Spannbänder auf, die über Filmscharniere an Oberteil und Unterteil angelenkt sind.A closure marketed by the company Zeller Plastik GmbH has stretched straps in the open state, which are hinged to the upper and lower parts via film hinges.

Zu den obigen Erkenntnissen ist die Anmelderin durch aufwendige Messungen und Versuche gelangt und hat sich daher die Aufgabe gestellt, ein Kunststoffscharnier der eingangs genannten Art zu schaffen, bei dem Probleme der obengenannten Art vermieden werden können.
Diese Aufgabe löst die Erfindung durch einen Schnappscharnierverschluss aus Kunststoff mit den Merkmalen des Patentanspruches 1.
In den Zeichnungen ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt und anhand der nachfolgenden Beschreibung erläutert.The applicant has attained the above knowledge through complex measurements and tests and has therefore set itself the task of creating a plastic hinge of the type mentioned at the beginning, in which problems of the type mentioned above can be avoided.
The invention solves this problem by a snap hinge closure made of plastic with the features of claim 1.
In the drawings, an embodiment of the subject matter of the invention is shown and explained with reference to the following description.

Es zeigt:

  • Figur 1 den Schnappscharnierverschluss in etwa natürlicher Grösse auf einer Tube in Ansicht von vorne;
  • Figur 2 in Seitenansicht und
  • Figur 3 in Ansicht auf die Rückseite. In
  • Figur 4 ist derselbe Verschluss in grösserem Masstab in der vollständig geöffneten Spritzlage in Seitenansicht und in
  • Figur 5 in Ansicht von oben gesehen, wobei die Kappe von innen erkennbar ist
  • Figur 6 zeigt einen Vertikalschnitt durch die Schwenkachse des Schnappscharniers entlang der Linie B - B in Figur 5 und
  • Figur 7 einen Teilschnitt entlang der Linie C - C in Figur 5.
  • Figur 8 a und b zeigt verschiedene Querschnittsformen der Spannbänder.
It shows:
  • Figure 1 shows the snap hinge closure in approximately natural size on a tube in front view;
  • Figure 2 in side view
  • Figure 3 in view of the back. In
  • Figure 4 is the same closure on a larger scale in the fully open spray position in side view and in
  • 5 seen in a view from above, the cap being recognizable from the inside
  • FIG. 6 shows a vertical section through the pivot axis of the snap hinge along the line BB in FIGS
  • 7 shows a partial section along the line C - C in FIG. 5.
  • Figure 8 a and b shows different cross-sectional shapes of the straps.

In der Zeichnung ist der Unterteil des einteiligen Schnappscharnierverschlusses mit 1, der damit verbundene Oberteil mit 2 bezeichnet. Das Schnappscharnier ist in der dargestellten Form in einem Verschluss integriert. Das dargestellte Ausführungsbeispiel nach dem erfindungsgemässen Prinzip ist ein Verschluss, bei dem der Verschlussunterteil 1 auf einer Tube T befestigt ist. Der Oberteil 2 ist in diesem Falle eine Kappe. Die beiden Teile 1 und 2 des Verschlusses sind über ein übliches, leicht über die Umfangsmantelwand hinausragendes Filmscharnier 3 miteinander verbunden. Die Mantelwand 4 des Unterteiles 1 und die Mantelwand 5 der Kappe, bzw. des Oberteiles 2 stehen vertikal übereinander. Dem Filmscharnier gegenüberliegend ist im Ober- und Unterteil eine Einbuchtung 8 angebracht, die das Oeffnen des Verschluss erleichtern soll. Links und rechts des Filmscharniers 3 sind fast nur noch ansatzweise die beiden Spannbänder 6 erkennbar. Sie sind so in den Mantelflächen 4 und 5 integriert, dass lediglich noch die seitlichen Begrenzungen 7 erkennbar sind. Die Aussenflächen der Spannbänder 6 fluchten von geringfügigen Abweichungen abgesehen mit den Mantelflächen des Ober- bzw. Unterteiles 1, 2.In the drawing, the lower part of the one-piece snap hinge closure is denoted by 1, the upper part connected to it by 2. The snap hinge is integrated in a lock in the form shown. The illustrated embodiment according to the principle of the invention is a closure in which the lower closure part 1 is fastened on a tube T. The upper part 2 is a cap in this case. The two parts 1 and 2 of the closure are connected to one another via a conventional film hinge 3, which protrudes slightly beyond the peripheral jacket wall. The coat wall 4 of the lower part 1 and the outer wall 5 of the cap and the upper part 2 are vertically one above the other. Opposite the film hinge, an indentation 8 is provided in the upper and lower part, which should facilitate the opening of the closure. Left and right of the film hinge 3, the two tensioning straps 6 are almost only partially recognizable. They are integrated in the lateral surfaces 4 and 5 in such a way that only the lateral boundaries 7 can still be seen. Apart from minor deviations, the outer surfaces of the tensioning straps 6 are aligned with the outer surfaces of the upper and lower parts 1, 2.

In der Figur 4 ist dasselbe Ausführungsbeispiel des Schnappscharniers am Verschluss gemäss den Figuren 1 - 3 in der vollständig geöffneten Stellung in einem grösseren Massstab gezeigt. Der Unterteil 1 hat eine Deckfläche 9, die sich über die Trennebene E des Ober- und Unterteiles 1, 2 erhebt und einen konisch nach oben zulaufenden Ausguss 10 aufweist. Die Spannbänder 6 sind in dieser Stellung ungespannt und bilden einen Bogen. Da hier die Spannbänder auf der Peripherie der gewölbten Mantelflächen liegen, werden die Spannbänder im Bereich näher dem Filmscharnier stärker gewölbt als die weiter vom Filmscharnier entfernten Bereiche. Daher ist das Spannband in der Seitenansicht doppelt gewölbt sichtbar. Auch in der Ansicht nach Figur 5, die eine Aufsicht auf den Verschluss gemäss Figur 4 zeigt, erkennt man, dass der Radius der in dieser Stellung des Scharniers bogenförmigen Spannbänder 6 näher dem Filmscharnier 3 kleiner und entfernter vom Filmscharnier 3 grösser ist. Im Detail ist dies in Figur 7, einem Schnitt entlang der Linie C - C in Figur 5, dargestellt.
In dieser Darstellung nach Figur 5, in der man den Oberteil, bzw. die Kappe von unten bzw. von innen und den Unterteil von oben erkennt, sieht man auch die Nischen 11, in denen die Spannbänder angebracht sind. Die Nischen in der Kappe, bzw. dem Oberteil 2 durchbrechen die Mantelwand 5 nicht, sondern lassen eine minimal erforderliche Wandstärke bestehen, so dass im geschlossenen Zustand des Verschlusses Oberteil und Unterteil über dem gesamten Umfang der Mäntelwände aufeinander aufliegen. Dies ist von erheblicher Bedeutung, weil bekanntlich Kunststoff teile sich statisch stark aufladen. In der Folge werden Staubteile bei einem nicht vollständig schliessenden Verschluss magnetisch durch eventuelle Schlitze ins Innere gezogen und führen zu einer sichtbaren Verschmutzung. Die Bodenflächen der Nischen 11 verlaufen geneigt zur Trennebene E. Dabei müssen natürlich die Spannbänder 6 je weiter sie von der Schwenkachse, nämlich dem Filmscharnier 3 weg sind, umso länger sein. Folglich verlaufen die Nischenböden von dem vom Filmscharnier entfernteren Ende von unten zu dem vom Filmscharnier näheren, oberen Ende. In der Figur 6, einem Schnitt durch den offenen Verschluss in der Vertikalen durch das Filmscharnier, sind die Nischenböden punktiert eingetragen, obwohl sie in dieser Ansicht natürlich nicht sichtbar sind.FIG. 4 shows the same exemplary embodiment of the snap hinge on the closure according to FIGS. 1-3 in the fully open position on a larger scale. The lower part 1 has a cover surface 9, which rises above the parting plane E of the upper and lower part 1, 2 and has a conical spout 10. The tensioning straps 6 are untensioned in this position and form an arc. Since the tensioning straps lie on the periphery of the curved jacket surfaces here, the tensioning straps are curved more strongly in the area closer to the film hinge than the areas further away from the film hinge. Therefore, the tensioning strap is visible in the side view with a double arch. Also in the view according to FIG. 5, which shows a top view of the closure according to FIG. 4, it can be seen that the radius of the tensioning straps 6, which in this position of the hinge is arch-shaped, is smaller closer to the film hinge 3 and larger from the film hinge 3. This is shown in detail in FIG. 7, a section along the line C - C in FIG. 5.
In this illustration according to FIG. 5, in which the upper part or the cap can be seen from below or from the inside and the lower part from above, one can also see the niches 11 in which the tensioning straps are attached. The niches in the cap or the upper part 2 do not break through the jacket wall 5, but leave a minimal wall thickness required, so that in the closed state of the closure the upper part and lower part rest on one another over the entire circumference of the jacket walls. This is of considerable importance because, as is well known, plastic parts are subject to high static charges. As a result, dust particles are magnetically drawn through possible slits in the event of a closure that does not close completely and lead to visible contamination. The bottom surfaces of the niches 11 are inclined to the parting plane E. Of course, the straps 6 must be the longer they are from the pivot axis, namely the film hinge 3, the longer. As a result, the niche floors run from the end farther from the film hinge from below to the upper end closer to the film hinge. In FIG. 6, a section through the open closure in the vertical through the film hinge, the niche floors are shown in dotted lines, although of course they are not visible in this view.

Ein wesentlicher Unterschied zwischen den Spannbändern, wie sie in dieser Erfindung angewendet werden, und den Zwischenelementen gemäss dem Stand der Technik ist, dass die Spannbänder 6 vom Ansatzpunkt in den Nischen 11 über ihre gesamte Länge mindestens annähernd die gleiche Querschnittsfläche aufweisen. Zwar können die Bänder am Ansatz gerundet und verdickt sein, um eine Kerbwirkung zu vermeiden. Im dem Bereich jedoch, der zur erforderlichen elastischen Längsdehnung führt, bleibt die Querschnittsfläche von Ungenauigkeiten abgesehen gleich.
Die Querschnittsform der Spannbänder 6 kann sehr unterschiedlich gestaltet werden. Dies zeigen die Beispiele der Figuren 8a und b. So kann die Aussenfläche exakt der Kontur der Mantelwand angepasst, jedoch die Innenfläche gerade sein. (Figur 8a)
Aber neben der rein rechteckigen Form wie in Figur 6 ersichtlich, wäre auch eine allseitig konvexe Form, beispielsweise eine Ellipse wie in Figur 8b möglich.A major difference between the straps used in this invention be, and the intermediate elements according to the prior art is that the straps 6 from the starting point in the niches 11 have at least approximately the same cross-sectional area over their entire length. The straps can be rounded and thickened at the base in order to avoid a notch effect. However, in the area that leads to the required elastic longitudinal expansion, the cross-sectional area remains the same apart from inaccuracies.
The cross-sectional shape of the straps 6 can be designed very differently. This is shown by the examples in FIGS. 8a and b. So the outer surface can be adapted exactly to the contour of the jacket wall, but the inner surface can be straight. (Figure 8a)
But in addition to the purely rectangular shape as can be seen in FIG. 6, an all-round convex shape, for example an ellipse as in FIG. 8b, would also be possible.

Claims (5)

  1. One-piece snap hinge closure made from plastic with a lower part (1) and an upper part (2), each of which has a circumferential wall (4, 5), said two circumferential walls (4, 5) being congruently vertically superimposed when the hinge is in the closed position and in which the lower part (1) is connected to the upper part (2) via a film hinge (3) and is connected by means of two lamellar straps (6) arranged on either side of the film hinge (3) and which are stretched in the closed position of the hinge, in the open state of the closure the straps (6) running in a cambered surface and in the closed state of the closure are stretched and the starts of the straps are fitted to the recess bottom surfaces, which are so inclined to the separation plane (E) between the upper part and the lower part that the sides of the lamellar straps closer to the film hinge (3) are shorter than the more remote sides and in which the straps from the start in the recesses (11) in the circumferential walls (4, 5) and have over their entire length an almost constant hinge-free cross-section and are aligned in the closed position by their outermost partial faces with the circumferential outer walls.
  2. One-piece snap hinge closure according to claim 1, characterized in that the starts of the straps (6) in the recess bottom surfaces are rounded.
  3. One-piece snap hinge closure according to claim 1, characterized in that the recesses (11) at least approximately correspond to the shape and size of the stretched straps (6), so that in the closed position of the hinge they are completely received in the recesses (11) and cover the same.
  4. One-piece snap hinge closure according to claim 1, characterized in that the cross-sectional shape of the straps (6) at least approximately corresponds to a flat rectangle.
  5. One-piece snap hinge closure according to claim 1, characterized in that the cross-sectional shape of the straps is convex on at least one side.
EP88810296A 1987-05-13 1988-05-05 One-piece hinged snap-on cap Expired - Lifetime EP0291457B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88810296T ATE56412T1 (en) 1987-05-13 1988-05-05 ONE PIECE SNAP HINGE CLOSURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1834/87 1987-05-13
CH1834/87A CH672771A5 (en) 1987-05-13 1987-05-13

Publications (4)

Publication Number Publication Date
EP0291457A2 EP0291457A2 (en) 1988-11-17
EP0291457A3 EP0291457A3 (en) 1989-11-15
EP0291457B1 EP0291457B1 (en) 1990-09-12
EP0291457B2 true EP0291457B2 (en) 1997-11-26

Family

ID=4219686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810296A Expired - Lifetime EP0291457B2 (en) 1987-05-13 1988-05-05 One-piece hinged snap-on cap

Country Status (12)

Country Link
US (1) US4854473A (en)
EP (1) EP0291457B2 (en)
JP (1) JP2680035B2 (en)
AT (1) ATE56412T1 (en)
AU (1) AU609810B2 (en)
CA (1) CA1303521C (en)
CH (1) CH672771A5 (en)
DE (1) DE3860595D1 (en)
DK (1) DK164036C (en)
ES (1) ES2017801T5 (en)
IL (1) IL86250A (en)
ZA (1) ZA883295B (en)

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Also Published As

Publication number Publication date
IL86250A0 (en) 1988-11-15
DE3860595D1 (en) 1990-10-18
JPS63317467A (en) 1988-12-26
AU1560788A (en) 1988-11-17
ATE56412T1 (en) 1990-09-15
IL86250A (en) 1992-02-16
DK164036C (en) 1992-09-28
US4854473A (en) 1989-08-08
ES2017801B3 (en) 1991-03-01
CH672771A5 (en) 1989-12-29
DK244288A (en) 1988-11-14
DK164036B (en) 1992-05-04
CA1303521C (en) 1992-06-16
AU609810B2 (en) 1991-05-09
JP2680035B2 (en) 1997-11-19
DK244288D0 (en) 1988-05-05
ZA883295B (en) 1988-11-14
EP0291457A3 (en) 1989-11-15
EP0291457B1 (en) 1990-09-12
US4854473B1 (en) 1991-10-15
EP0291457A2 (en) 1988-11-17
ES2017801T5 (en) 1998-03-16

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