EP0755351B1 - Container with a non-round follower plunger for pasty materials - Google Patents
Container with a non-round follower plunger for pasty materials Download PDFInfo
- Publication number
- EP0755351B1 EP0755351B1 EP95916727A EP95916727A EP0755351B1 EP 0755351 B1 EP0755351 B1 EP 0755351B1 EP 95916727 A EP95916727 A EP 95916727A EP 95916727 A EP95916727 A EP 95916727A EP 0755351 B1 EP0755351 B1 EP 0755351B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- piston
- receptacle
- curvature
- round
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
- B05B11/028—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
Definitions
- the present invention relates to a container intended to contain a pasty product such as than a cream, gel or emulsion. More particularly, said container is designed to be used in combination with a distribution device of the non-return type air, i.e. the volume of product extracted from the container by the distribution is not replaced by the same volume of air.
- a distribution device of the non-return type air i.e. the volume of product extracted from the container by the distribution is not replaced by the same volume of air.
- two solutions its possible: a first consists in packaging the pasty product in a flexible pocket which retracts as the product is distributed by the dispensing device which can be a pump, for example.
- a second solution consists in equipping the container with a follower piston which rises tightly in the jerk by a distance corresponding to the volume of product extracted from the container. This piston therefore follows the product in its reduction in volume.
- follower pistons like many other parts, are made by molding, by injecting a heated plastic material into a mold. As it cools, the plastic initially expanded, contracts, and thus creates a shrinkage of material. This shrinkage is therefore a direct physical consequence of heat loss due to the contact of hot plastic with cooler mold. It must therefore be taken into account. account by the mold, so as to obtain a plastic part having the dimensions wanted. To do this, the mold must be slightly larger than the desired final part to be able to pass on the removal of material. In practice, the mold makers responsible for make the mold carry out the final sizing of the mold taking into account the shrinkage by retouching using appropriate tools, for example an EDM machine wire. This operation is carried out empirically until a mold having the appropriate ratings, given the withdrawal.
- the retouching operation is relatively simple. Parts with axial symmetry such as the round piston are in fact molded by injection in the center, i.e. the hot and pasty plastic material penetrates radially in the mold and reaches the extreme parts corresponding to the sealing lips of the piston follower at the same time. The shrinkage phenomenon then affects the molded part uniformly over its entire periphery.
- the retouching work is thus simplified, because it must be carried out uniformly on the periphery.
- the touch-up machine can then be programmed in a simple way to work on a circle. This technique is good known from the prior art and specially adapted with regard to sizing molds of round follower pistons.
- the touch-up work is therefore more important on these parts distant from the injection center.
- the complexity of the form added to the non-uniformity of the shrinkage phenomenon makes retouching work almost impossible to perform.
- the retouching machine becomes improgrammable. It is in particular the case of the mold necessary to manufacture the ellipsoidal follower piston of the container described in document DE-U-8 815 089.
- the object of the present invention is to remedy the aforementioned drawbacks inherent in the manufacture of non-round follower pistons.
- the present invention relates to a container intended to contain a pasty product, said container comprising an oblong cylindrical body surmounted by a neck intended to receive a distribution device of the type without air intake, said container comprising a follower piston produced by molding a sliding plastic material tight contact inside said oblong cylindrical body as the product is discharged from said container, characterized in that the follower piston has a periphery oblong contact exterior with two parts of greater curvature defined by a pair of arcs of a circle with the same radius of curvature, said arcs of a circle being arranged relative to each other according to a first specular symmetry and connected to each other by two connection segments each defined by at least an arc.
- the connecting segments are defined by a pair of arcs of circle with the same radius of curvature arranged relative to each other according to a second specular symmetry perpendicular to the first specular symmetry.
- This definition of connecting segments creates a perfectly oval shape with central symmetry.
- touch-up work was also necessary on the connection segments, this is possible by programming the touch-up machine on a curvature circle corresponding.
- a perfect dimensioning of the piston follower mold is obtained.
- the dispenser of FIGS. 1 and 2 essentially consists of a container or tank 1 comprising an oblong cylindrical body of oval shape with central symmetry. This body is surmounted by a neck receiving a distribution device which is here a pump 4. To protect this pump, a cap 5 is provided which covers the pump in snapping onto the container.
- a pump 4 is here a distribution device which is here a pump 4.
- a cap 5 is provided which covers the pump in snapping onto the container.
- the object of the present invention not being linked to the structure even of the pump used, the latter will not be described in its elements constitutive. However, the pump used is still of a certain type, in the occurrence without air intake.
- a follower piston 2 is provided in the container 1 to compensate for the volume of product dispensed by the pump.
- a shutter base 3 further completes the container 1 by snap-fastening.
- the follower piston 1 comprises a wall 22 relatively flat oval which actually forms the bottom of the container 1. This wall 22 extends substantially perpendicular to the axis of movement of the piston 2 in the container. Said wall 22 is surrounded by an oval sleeve whose upper ends and lower form two sealing lips 21 in sealed contact with the interior of the container 1. The outer circumference of contact of the follower piston 2 is therefore delimited by said lips sealing 21.
- this outer contact periphery 21 has two more parts strong curvature 21 'defined by a pair of arcs of the same radius of curvature r arranged according to a first specular symmetry Sr.
- these arcs of the same radius r are connected to each other by them 21 "connection segments defined by another pair of arcs of the same circle radius of curvature R greater than r and arranged in a second specular symmetry SR perpendicular to Sr.
- the outer contact periphery 21 of the follower piston 1 is perfectly oval shape with central symmetry.
- connection points different arcs of a circle are such that the periphery 21 is perfectly regular, that is to say that the values of the derivatives of the oval curve on either side of these points of connection are equal, i.e. the circles are tangent to the points of connection.
- the inner shape of the container is linked to the shape of the outer periphery 21 of the follower piston whose parts of greatest curvature are produced according to the invention with arcs of a circle.
- the entire outer contact periphery 21 is made with adjoining arc segments. Indeed, an external contact perimeter offers better sealing if it has a certain curvature towards the outside. We know that it is more difficult to achieve a good seal on straight portions of follower piston sealing lips, as the lip is not forced against the surface flat interior of the container in which the piston slides.
Landscapes
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Reciprocating Pumps (AREA)
- Closures For Containers (AREA)
- Details Of Reciprocating Pumps (AREA)
- Tubes (AREA)
Description
La présente invention concerne un récipient destiné à contenir un produit pâteux tel qu'une crème, un gel ou une émulsion. Plus particulièrement, ledit récipient est conçu pour être utilisé en association avec un dispositif de distribution du type sans reprise d'air, c'est-à-dire que le volume de produit extirpé du récipient par le dispositif de distribution n'est pas remplacé par un même volume d'air. Dans ce cas, deux solutions son envisageables : une première consiste à conditionner le produit pâteux dans une poche souple qui se rétracte au fur et à mesure que du produit est distribué par le dispositif de distribution qui peut être une pompe, par exemple. Une deuxième solution consiste à équiper le récipient avec un piston suiveur qui remonte de façon étanche dans le récipient par à-coup d'une distance correspondant au volume de produit extrait du récipient. Ce piston suit donc le produit dans sa diminution de volume.The present invention relates to a container intended to contain a pasty product such as than a cream, gel or emulsion. More particularly, said container is designed to be used in combination with a distribution device of the non-return type air, i.e. the volume of product extracted from the container by the distribution is not replaced by the same volume of air. In this case, two solutions its possible: a first consists in packaging the pasty product in a flexible pocket which retracts as the product is distributed by the dispensing device which can be a pump, for example. A second solution consists in equipping the container with a follower piston which rises tightly in the jerk by a distance corresponding to the volume of product extracted from the container. This piston therefore follows the product in its reduction in volume.
Il est déjà connu de l'art antérieur d'équiper des récipients de section transversale ronde de tels pistons-suiveurs. La fabrication d'un moule à piston-suiveur rond ainsi que leur moulage ne présente aucune difficulté technique, étant donnée la symétrie parfaite de révolution de la pièce à mouler ainsi que du moule.It is already known in the prior art to equip cross-section containers round of such follower pistons. The manufacture of a round piston-follower mold as well as their molding presents no technical difficulty, given the perfect symmetry of revolution of the part to be molded as well as of the mold.
Il est également connu de l'art antérieur de réaliser des récipients de section transversale autre que ronde. Ce type de récipient est plus particulièrement adapté à être utilisé avec un dispositif de distribution à reprise d'air ou un récipient à poche souple. Ceci s'explique par le fait qu'il est difficile de réaliser un piston-suiveur autre que rond, car le contact d'étanchéité entre la face inteme du récipient et la lèvre de contact étanche du piston-suiveur n'est plus rond. Avec un piston rond, la force de contact étanche s'exerce radialement et uniformément sur la face interne du récipient. En revanche, avec un piston non rond, un ajustement parfait du contact étanche ainsi qu'une uniformité de force sur la périphérie interne de récipient ne peuvent être obtenus dans les mêmes conditions qu'avec un piston parfaitement rond.It is also known in the prior art to produce containers of section transverse other than round. This type of container is more particularly adapted to be used with an air return distribution device or a flexible bag container. This is explained by the fact that it is difficult to produce a follower piston other than round, because the sealing contact between the inner face of the container and the sealing contact lip of the follower piston is no longer round. With a round piston, the tight contact force is exerted radially and uniformly on the internal face of the container. On the other hand, with a piston non-round, a perfect fit of the waterproof contact as well as a uniform force on the inner periphery of container can only be obtained under the same conditions as with a perfectly round piston.
En effet, les pistons-suiveurs, comme beaucoup d'autres pièces, sont réalisés par moulage, en injectant une matière plastique chauffée dans un moule. En se refroidissant, la matière plastique initialement dilatée, se contracte, et crée ainsi un retrait de matière. Ce retrait est donc une conséquence physique directe de la perte thermique en raison du contact de la matière plastique chaude avec le moule plus froid. Il doit donc être pris en compte par le moule, de façon à obtenir une pièce en matière plastique ayant les cotes voulues. Pour ce faire, le moule doit être légèrement plus grand que la pièce finale voulue pour pouvoir répercuter le retrait de matière. Dans la pratique, les moulistes chargés de réaliser le moule effectuent le dimensionnement final du moule en tenant compte du retrait par retouche à l'aide d'un outillage approprié, par exemple une machine d'électro-érosion à fil. Cette opération s'effectue de façon empirique jusqu'à obtenir un moule ayant les cotes appropriées, compte tenu du retrait.In fact, follower pistons, like many other parts, are made by molding, by injecting a heated plastic material into a mold. As it cools, the plastic initially expanded, contracts, and thus creates a shrinkage of material. This shrinkage is therefore a direct physical consequence of heat loss due to the contact of hot plastic with cooler mold. It must therefore be taken into account. account by the mold, so as to obtain a plastic part having the dimensions wanted. To do this, the mold must be slightly larger than the desired final part to be able to pass on the removal of material. In practice, the mold makers responsible for make the mold carry out the final sizing of the mold taking into account the shrinkage by retouching using appropriate tools, for example an EDM machine wire. This operation is carried out empirically until a mold having the appropriate ratings, given the withdrawal.
Dans le cas d'un piston-suiveur rond, l'opération de retouche est relativement simple. Les pièces à symétrie axiale tels que le piston rond sont en effet moulées par injection au centre, c'est-à-dire la matière plastique chaude et pâteuse pénètre radialement dans le moule et atteint les parties extrêmes correspondant aux lèvres d'étanchéité du piston-suiveur en même temps. Le phénomène de retrait affecte alors la pièce moulée uniformément sur toute sa périphérie. Le travail de retouche s'en trouve ainsi simplifiée, car il doit s'effectuer uniformément sur la périphérie. La machine de retouche peut alors être programmée de façon simple pour travailler sur un cercle. Cette technique est bien connue de l'art antérieur et spécialement adaptée en ce qui concerne le dimensionnement des moules de pistons-suiveurs ronds.In the case of a round follower piston, the retouching operation is relatively simple. Parts with axial symmetry such as the round piston are in fact molded by injection in the center, i.e. the hot and pasty plastic material penetrates radially in the mold and reaches the extreme parts corresponding to the sealing lips of the piston follower at the same time. The shrinkage phenomenon then affects the molded part uniformly over its entire periphery. The retouching work is thus simplified, because it must be carried out uniformly on the periphery. The touch-up machine can then be programmed in a simple way to work on a circle. This technique is good known from the prior art and specially adapted with regard to sizing molds of round follower pistons.
Dans le cas d'un piston-suiveur autre que rond, ce travail de retouche est également nécessaire. Cependant, il n'est plus possible de programmer la machine de retouche avec un parcours de travail aussi simple que le cercle. De plus, comme le piston n'est pas rond, la matière plastique, lors du moulage par injection au centre, n'atteint pas en même temps les parties extrêmes correspondant aux lèvres d'étanchéité. La matière plastique pâteuse doit effectuer un trajet à l'intérieur qui n'est pas radialement uniforme. Puisque le piston n'est pas rond, il y a nécessairement les parties extrêmes du moule qui sont plus éloignées que d'autres du centre par où s'effectue l'injection. Or, le phénomène de retrait de matière est proportionnel à l'épaisseur de la pièce. Les parties les plus éloignées du centre d'injection sont donc plus fortement affectées que les autres plus proches du centre d'injection par ce phénomène de retrait. Le travail de retouche est donc plus important sur ces parties éloignées du centre d'injection. La complexité de la forme ajoutée à la non-uniformité du phénomène de retrait rendent le travail de retouche quasiment impossible à effectuer. La machine de retouche devient improgrammable. C'est notamment le cas du moule nécessaire pour fabriquer le piston suiveur ellipsoïdale du récipient décrit dans le document DE-U-8 815 089.In the case of a piston follower other than round, this retouching work is also necessary. However, it is no longer possible to program the retouching machine with a work path as simple as the circle. In addition, since the piston is not round, the plastic material, in the center injection molding, does not reach at the same time the end parts corresponding to the sealing lips. Plastic material pasty must make an interior path that is not radially uniform. Since the piston is not round, there are necessarily the extreme parts of the mold which are more distant than others from the center where the injection takes place. However, the phenomenon of withdrawal of material is proportional to the thickness of the part. The most distant parts of injection center are therefore more strongly affected than the others closer to the center injection by this withdrawal phenomenon. The touch-up work is therefore more important on these parts distant from the injection center. The complexity of the form added to the non-uniformity of the shrinkage phenomenon makes retouching work almost impossible to perform. The retouching machine becomes improgrammable. It is in particular the case of the mold necessary to manufacture the ellipsoidal follower piston of the container described in document DE-U-8 815 089.
Le but de la présente invention est de remédier aux inconvénients susmentionnés inhérents à la fabrication de pistons-suiveurs non ronds.The object of the present invention is to remedy the aforementioned drawbacks inherent in the manufacture of non-round follower pistons.
Pour ce faire, la présente invention a pour objet un récipient destiné à contenir un produit pâteux, ledit récipient comportant un corps cylindrique oblong surmonté d'un col destiné à recevoir un dispositif de distribution du type sans reprise d'air, ledit récipient comprenant un piston suiveur réalisé par moulage d'une matière plastique coulissant à contact étanche à l'intérieur dudit corps cylindrique oblong à mesure que le produit est refoulé hors dudit récipient, caractérisé en ce que le piston suiveur présente un pourtour extérieur de contact de forme oblongue présentant deux parties de plus forte courbure définies par une paire d'arcs de cercle de même rayon de courbure, lesdits arcs de cercle étant disposés l'un par rapport à l'autre selon une première symétrie spéculaire et raccordés l'un à l'autre par deux segments de raccordement définis chacun par au moins un arc de cercle. En réalisant le piston-suiveur de cette façon, on revient, en ce qui concerne les deux parties de plus forte courbure, au cas d'un piston parfaitement rond. La machine peut être programmée sur un cercle et travaillée sur un arc de cercle correspondant à la courbure desdites parties extrêmes. De plus, il n'est pratiquement nécessaire que de retoucher ces parties de plus forte courbure situées le plus en éloignement du centre d'injection, car les autres parties du moule ne subissent le phénomène de retrait que très faiblement. Ceci s'explique par le fait que l'épaisseur minimale d'un tel récipient est très largement inférieure au diamètre d'un récipient rond de même contenance. C'est pourquoi le phénomène de retrait n'affecte pour ainsi dire que les parties de plus forte courbure, qui elles seules nécessitent un travail de retouche.To do this, the present invention relates to a container intended to contain a pasty product, said container comprising an oblong cylindrical body surmounted by a neck intended to receive a distribution device of the type without air intake, said container comprising a follower piston produced by molding a sliding plastic material tight contact inside said oblong cylindrical body as the product is discharged from said container, characterized in that the follower piston has a periphery oblong contact exterior with two parts of greater curvature defined by a pair of arcs of a circle with the same radius of curvature, said arcs of a circle being arranged relative to each other according to a first specular symmetry and connected to each other by two connection segments each defined by at least an arc. By making the follower piston in this way, we come back, in what concerns the two parts of greater curvature, in the case of a perfectly round piston. The machine can be programmed on a circle and worked on an arc corresponding to the curvature of said end parts. In addition, it is practically necessary only to touch up these parts of greater curvature located more in away from the injection center, because the other parts of the mold do not undergo the withdrawal phenomenon only very weakly. This is explained by the fact that the thickness minimum of such a container is very much less than the diameter of a round container of same capacity. This is why the withdrawal phenomenon only affects, so to speak, parts of greater curvature, which alone require touch-up work.
De préférence, les segments de raccordement sont définis par une paire d'arcs de cercle de même rayon de courbure disposés l'un par rapport à l'autre selon une seconde symétrie spéculaire perpendiculaire à la première symétrie spéculaire. Cette définition des segments de raccordement engendre une forme parfaitement ovale à symétrie centrale. Au cas où un travail de retouche était également nécessaire sur les segments de raccordement, cela est possible en programmant la machine de retouche sur un cercle de courbure correspondante. Ainsi, en réglant la machine de retouche à deux reprises uniquement, un dimensionnement parfait du moule à piston-suiveur est obtenu.Preferably, the connecting segments are defined by a pair of arcs of circle with the same radius of curvature arranged relative to each other according to a second specular symmetry perpendicular to the first specular symmetry. This definition of connecting segments creates a perfectly oval shape with central symmetry. At case where touch-up work was also necessary on the connection segments, this is possible by programming the touch-up machine on a curvature circle corresponding. Thus, by adjusting the touch-up machine only twice, a perfect dimensioning of the piston follower mold is obtained.
L'invention va maintenant être décrite en référence aux dessins annexés, donnant à titre d'exemple non limitatif, un mode de réalisation de l'invention.The invention will now be described with reference to the accompanying drawings, giving by way of nonlimiting example, an embodiment of the invention.
Sur les dessins :
- la figure 1 est une vue en coupe de profil d'un distributeur de produit pâteux incorporant la présente invention,
- la figure 2 est une vue en coupe de face d'un distributeur de la figure 1,
- la figure 3 est une représentation schématique du pourtour extérieur de contact d'un piston-suiveur réalisé conformément à la présente invention.
- FIG. 1 is a profile section view of a pasty product dispenser incorporating the present invention,
- FIG. 2 is a front sectional view of a dispenser of FIG. 1,
- Figure 3 is a schematic representation of the outer contact periphery of a follower piston made in accordance with the present invention.
Le distributeur des figures 1 et 2 est essentiellement constitué d'un récipient ou
réservoir 1 comportant un corps cylindrique oblong de forme ovale à symétrie centrale.
Ce corps est surmonté d'un col recevant un dispositif de distribution qui est ici une
pompe 4. Pour protéger cette pompe, il est prévu un capuchon 5 qui coiffe la pompe en
s'encliquetant sur le récipient. L'objet de la présente invention n'étant pas lié à la structure
même de la pompe utilisée, cette dernière ne sera pas décrite dans ses éléments
constitutifs. Cependant, la pompe utilisée est tout de même d'un certain type, en
l'occurrence sans reprise d'air. Pour cela, un piston-suiveur 2 est prévu dans le récipient
1 afin de compenser le volume de produit distribué par la pompe. Un culot d'obturation 3
vient en outre compléter le récipient 1 par encliquetage. A chaque relâchement du
poussoir 41 de la pompe 4, la chambre de pompe se remplit d'une dose de produit d'un
certain volume. Simultanément au remplissage de la chambre de pompe, le piston-suiveur
2 remonte dans le récipient 1 en direction de la pompe sur une distance correspondant au
volume de la dose prélevée. Le piston-suiveur 1 comprend une paroi 22 relativement
plane de forme ovale qui réalise en fait le fond du récipient 1. Cette paroi 22 s'étend
sensiblement perpendiculairement à l'axe de déplacement du piston 2 dans le récipient.
Ladite paroi 22 est entourée par un manchon ovale dont le extrémités supérieures et
inférieures
forment deux lèvres d'étanchéité 21 en contact étanche avec l'intérieur du récipient 1. Le
pourtour extérieur de contact du piston-suiveur 2 est donc délimité par lesdites lèvres
d'étanchéité 21.The dispenser of FIGS. 1 and 2 essentially consists of a container or
Selon l'invention, ce pourtour extérieur de contact 21 présente deux parties de plus
forte courbure 21' définies par une paire d'arc de cercle de même rayon de courbure r
disposés selon une première symétrie spéculaire Sr. En outre,
ces arcs de cercle de même rayon r sont raccordés l'un à l'autre par eux
segments de raccordement 21" définis par une autre paire d'arcs de cercle de même autre
rayon de courbure R supérieure à r et disposés selon une seconde symétrie spéculaire SR
perpendiculaire à Sr. Ainsi, le pourtour extérieur de contact 21 du piston-suiveur 1 est de
forme parfaitement ovale à symétrie centrale. Bien entendu, les points de raccordement
des différents arcs de cercle sont tels que le pourtour 21 est parfaitement régulier, c'est-à-dire
que les valeurs des dérivées de la courbe ovale de part et d'autre de ces points
de raccordement sont égales, c'est-à-dire les cercles sont tangents aux points de
raccordement.According to the invention, this
Pour des questions de facilité de retouche du moule précédemment exposées, la
forme intérieure du récipient est liée à la forme du pourtour extérieur 21 du piston-suiveur
dont les parties de plus forte courbure sont réalisées selon l'invention
avec des arcs de cercle.For questions of ease of touching up the mold previously exposed, the
inner shape of the container is linked to the shape of the
Cependant, tout le pourtour extérieur de contact 21 est réalisé
avec les segments d'arc de cercle jointifs. En effet, un pourtour extérieur de contact offre
une meilleure étanchéité si elle présente une certaine courbure vers l'extérieur. On sait
qu'il est plus difficile de réaliser une bonne étanchéité sur des portions rectilignes de
lèvres d'étanchéité de piston suiveur, car la lèvre n'est pas contrainte contre la surface
intérieure plate du récipient dans lequel le piston coulisse.However, the entire
Par expérience, il a été constaté que, pour garantir un bon maintien du piston 2 dans
le récipient 1, le rapport de la dimension maximale E à la dimension minimale e du piston
devait être inférieur à environ trois.From experience, it has been observed that, in order to guarantee good maintenance of the
Claims (2)
- A receptacle (1) for containing a semi-solid substance, said receptacle (1) comprising an oblong cylindrical body surmounted by a neck for receiving a dispenser device of the type that does not allow ingress of air, said receptacle (1) including a molded plastics follower piston (2) that slides with sealing contact inside said oblong cylindrical body as substance is expelled from said receptacle (1), the receptacle being the follower piston (2) having an outer contact periphery (21) of oblong shape including two portions of greater curvature (21') defined by a pair of circular arcs having the same radius of curvature, said circular arcs being disposed opposite each other in first mirror symmetry (Sr) and being connected to each other by two connection segments (21"), characterized in that the two connection segments (21") are each defined by at least one circular arc.
- A receptacle according to claim 1, in which the connection segments (21") are defined by a pair of circular arcs having the same radius of curvature and disposed opposite each other in second mirror symmetry (SR) perpendicular to the first mirror symmetry.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9404293 | 1994-04-12 | ||
| FR9404293A FR2718417B1 (en) | 1994-04-12 | 1994-04-12 | Container for pasty products with non-round follower piston. |
| PCT/FR1995/000451 WO1995027664A1 (en) | 1994-04-12 | 1995-04-07 | Container with a non-round follower plunger for pasty materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0755351A1 EP0755351A1 (en) | 1997-01-29 |
| EP0755351B1 true EP0755351B1 (en) | 1998-07-08 |
Family
ID=9461986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95916727A Expired - Lifetime EP0755351B1 (en) | 1994-04-12 | 1995-04-07 | Container with a non-round follower plunger for pasty materials |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5961005A (en) |
| EP (1) | EP0755351B1 (en) |
| JP (1) | JPH09511723A (en) |
| DE (1) | DE69503367T2 (en) |
| FR (1) | FR2718417B1 (en) |
| WO (1) | WO1995027664A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69919326T2 (en) * | 1999-05-07 | 2005-09-08 | Airlessystems | Snapped dispenser with a follower piston |
| DE602004014419D1 (en) * | 2004-05-06 | 2008-07-24 | Rexam Dispensing Smt | CLOSING DEVICE FOR A NON-VENTILATED LIQUID PRODUCT DISPENSER |
| FR2903672B1 (en) * | 2006-07-11 | 2008-09-12 | Oreal | DOUBLE ENVELOPE PACKAGING DEVICE |
| FR2961736B1 (en) * | 2010-06-23 | 2012-08-03 | Airlessystems | METHOD AND MOLD FOR MANUFACTURING A TANK FOR SLIDING AND FOLLOWING PISTON. |
| US11382400B2 (en) | 2018-08-10 | 2022-07-12 | Go Products Co. | Material applicator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR653310A (en) * | 1927-04-23 | 1929-03-20 | Removable bottle for various uses, in particular usable as a worker bottle | |
| DE3708704A1 (en) * | 1987-03-18 | 1988-09-29 | Fischbach A Kunststoff Kg | MEASURING CARTRIDGE FOR PASTOESE |
| DE8815089U1 (en) * | 1988-12-03 | 1990-03-29 | Schuckmann, Alfred Von, 4178 Kevelaer | Donors |
| FR2674024B1 (en) * | 1991-03-11 | 1994-03-11 | Daniel Crosnier | METERING DEVICE ADAPTABLE TO VARIOUS CONTAINERS. |
| EP0526811B1 (en) * | 1991-07-29 | 1997-03-12 | Aka Innovative Developments S.A. | Storage and distribution device for liquid or pasty products |
| US5449094A (en) * | 1992-05-18 | 1995-09-12 | Sofab | Dispenser with plunging sleeve |
-
1994
- 1994-04-12 FR FR9404293A patent/FR2718417B1/en not_active Expired - Fee Related
-
1995
- 1995-04-07 DE DE69503367T patent/DE69503367T2/en not_active Expired - Fee Related
- 1995-04-07 JP JP7526126A patent/JPH09511723A/en not_active Ceased
- 1995-04-07 US US08/722,254 patent/US5961005A/en not_active Expired - Fee Related
- 1995-04-07 WO PCT/FR1995/000451 patent/WO1995027664A1/en not_active Ceased
- 1995-04-07 EP EP95916727A patent/EP0755351B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE69503367D1 (en) | 1998-08-13 |
| JPH09511723A (en) | 1997-11-25 |
| DE69503367T2 (en) | 1999-04-15 |
| FR2718417A1 (en) | 1995-10-13 |
| EP0755351A1 (en) | 1997-01-29 |
| FR2718417B1 (en) | 1996-06-14 |
| WO1995027664A1 (en) | 1995-10-19 |
| US5961005A (en) | 1999-10-05 |
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