FR2516479A1 - CAPSULE FOR CLOSING A CONTAINER AND CONTAINER PROVIDED WITH SUCH A CAPSULE - Google Patents

Abstract

THE CLOSING CAPSULE11 IN SYNTHETIC PLASTIC MATERIAL, MONOBLOC AND WITHOUT INTERNAL COATING, IS INTENDED FOR A CONTAINER WITH OPEN NECK15, THE CAPSULE11 INCLUDES AN UPPER WALL RECESSED IN ITS CENTER26 AND FORMING AN INTERIOR BOSS 30 INTENDED FOR THE RECEPTACLE AND A COLLAR '' CLOSE, AND A PLANE33 SURFACE SURROUNDING THE BOSSAGE30 AND INTENDED TO COME IN ENTIRE SURFACE STOP AGAINST THE EXTREME16 FACE OF THE CONTAINER NECK WHEN THE CAPSULE IS SCREWED ON THIS LATTER.

Description

The present invention relates to soft closures

  for containers and in particular certain structures

  closures and their assembly with certain receptacles

  pients. The preferred embodiment of the invention will be described in relation to a container of the type described in US Patent No. 4,269,722, published May 26, 1981 (Joshi et al) As will be seen, the container may be similar to that described in the above patent

  except for the realization of the collar.

  The main object of the invention is a new structure for closing a container formed from a single

  part made of a rigid synthetic plastic material

  required, such as polypropylene, the upper wall of which

  re is pushed in to form an internal boss adapted to close the open end of the container neck when it is put in place Furthermore, the boss is surrounded by

  its base by a flat annular surface arranged to fit

  puyer firmly in abutment of direct integral surface all

  around the upper edge of the container neck opening.

  Another object of the invention is a new set of

  ble consisting of a container and the closure above, the closure or capsule being fixed on the container by a threaded connection arranged in a particular way, which pulls the flat sealing surface of the capsule firmly

  on the extreme edge of the container neck.

  Another object of the invention is a new bou-

  container cap in the cylindrical assembly comprising

  a hollow upper wall so as to form a bossa-

  neck closure, internal and cylindrical, surrounded by a flat annular surface arranged to come into firm contact against the end edge of the container neck, the plug thread cooperating with a corresponding external thread formed on the container neck just below

  from the end face of the outlet opening.

  Other features and purposes of the

  present invention will appear on reading the

  detailed description which follows, of an embodiment given by way of example and represented in the appended drawings, in which: FIG. 1 is a side view of a capsule

  for closing a container according to one embodiment

  preferred invention, Figure 2 is a plan view, looking at the interior of the capsule of Figure 1, Figure 3 is a sectional view along line 3-3 of Figure 2, Figure 4 is an enlarged view partially in section showing the cooperation of the capsule of FIG. 1 and the neck of the container, and FIG. 5 is a side view showing a container filled and closed in its normal position

  after packaging for transport.

  The invention provides a new closure capsule 11 for the container 12 The capsule 11 can be made entirely of polypropylene, while the container 12 can be made entirely of polyvinyl chloride The container 12 can be formed by blowing from a plastic material

  synthetic suitable, and is preferably transparent

  rent, so that the color of its contents is visible.

  The container 12 is of shape and dimensions

  known and, except for the place of the threada-

  outside on the neck of the container, can be sensi-

  similar to that used previously and

  shown in US Patent 4,269,722.

  The container 12 comprises a body 13 comprising a through opening with rounded edges which defines a handle 14 on one side of the top, and a cylindrical neck

  15 of reduced diameter which ends in an orifice or

  green surrounded by a surface facing in the axial direction 16 which is annular, planar, smooth and situated in a plane perpendicular to the axis A of the neck of the container The surface

  inner 17 of neck 15 is smooth and cylindrical, and

  eg the end surface 16 along a circular line indicated by the reference 18. A substantially helical external thread 19, consisting of a single coil with a slight overlap, is molded on the neck 15 near its end, just below the orifice A flat shoulder 21, situated in a plane parallel to the surface 16, is provided at the junction between the neck 15 and the body 13, and a shallow external finishing groove 22 is formed in the neck 15 just above the shoulder 21 This finishing groove is arranged to cooperate with a deburring device (not shown) which cuts the end surface 16 and corresponds on the face opposite to a continuous internal bead 23 which allows at the neck to keep a constant wall thickness and

to stay rigid.

  The capsule 11 is symmetrical about an axis B

  and comprises an upper wall 24 and, a side wall

  the, in the cylindrical assembly 25, which leaves the upper wall is pressed to form a relatively shallow concave central cavity 26 which has a

  annular side wall 27 and a bottom wall 28.

  As shown, the walls 27 and 28 have a constant thickness and substantially retain the thickness of the

side wall of capsule 25.

  The outer peripheral surface 29 of the side wall of the cavity is smooth and preferably either cylindrical or slightly tapered and converging downwards. A substantially cylindrical boss 30 is formed inside the capsule which, as will be seen further, is suitable for tight fitting

  in the hole in the neck of the container 12.

  The end portion 31 of the side wall 25 of

  the capsule present, where it joins the upper wall

  re of the capsule, a thickness substantially identical to that of the walls 27 and 28; it uniformly surrounds the side wall of the cavity and defines, with the upper wall of the capsule and the side wall 27, an annular recess 32 which surrounds the boss and, as will be seen, receives the end 16 of the neck 15 of the container when the capsule is placed on the latter.

  The bottom of the recess 32 is an annular surface.

  the smooth and flat surface 33 which is strictly perpendicular

  cular to the central axis B of the capsule Surface 33

  extends around the base of the boss 30 and cuts the surface

face 29 at right angles.

  A substantially helical thread 34 has come integrally on the internal face of the side wall 25 of the capsule and goes from the recess 32 to the neck portion of the capsule The thread 34 cooperates with the thread 19 of the neck of the container and s preferably extends, as

  shown, on more than two towers.

  The outer surface 35 of the cavity 26 of the capsule is curved, and its internal surface 36 is correspondingly curved and cuts the periphery 29 of its side wall according to a circle indicated at 37 This gives the upper wall of the capsule , a central arched area in inverted dome which reinforces this wall against its lateral deformation, when the capsule is

  screwed onto the container neck, as we will see

  void 32 thus surrounds the interior domed boss

30 of the capsule.

  The skirt of the side wall of the capsule may, as indicated at 38, be thinner than the other parts of the capsule because it is not subjected to high stresses during the positioning of the capsule, which allows saving material We can

  possibly provide, if desired, slight nerves

  vures de strengthenent 43 intended to make the skirt more rigid.

  The outer surface of the stopper May have notches as shown in 41, similar to the capsule of

  closure described in the patent cited above.

  In a capsule with a diameter of about 4.5 cm

  and a side wall about 2.7 cm long, the depth

  The size of the recess 32 can be about 0.63 cm.

  container 12 is normally intended to contain a powder

  relatively concentrated tergent, such as that described in

  the above patent, and the capsule 11 is used as an or-

  dosing gane insofar as only small quantities of this detergent are necessary for normal loads

washing machine.

  For example, the capsule described here has a volume of 1/8 glass, so two doses correspond to the normal amount of 1/4 glass of detergent normally used. When placing the capsule on the container neck, it is turned from its axis and the engagement of the threads pulls it axially until the boss penetrates into the neck opening and the surface 16 is in intimate and integral contact with the surface 33, on any

  its periphery The flexibility inherent in plastic materials

  ques used compensates for the low tolerances of the molding, so that the boss 30 fits tightly and firmly into the surface 17 of the neck to form a longitudinal seal 17, 29 substantially continuous with

  the axial seal 16.33.

  In addition, the boss 30 helps to retain the collar of the

  container its cylindrical shape while the capsule is screwed onto the thread of the neck, and the tightening of the assembly

is better.

  By arranging the connection by thread near the outer end of the neck of the container, and also where the thickness of the wall of the capsule is the most important, a more efficient coupling of the

capsule and container.

  Thanks to the deformation of the upper wall,

  can precisely control the interior volume ef-

  effective closure which is intended for precise dosing, while retaining the apparent height of the capsule above

above the container.

  Thus, in summary, the advantages of the capsule and of the assembly described above compared to those of the previous American patent are the following:

  1) an uncoated capsule is provided, which pre-

  feels a better seal with the container neck.

  In addition to its mechanical advantages, the elimination of the coating

  reduces manufacturing time and other costs.

  2) the new structure provides a more solid cap

  lide, of improved external appearance, and a better-dwarf

  the cap on the neck of the container during assembly

olage.

  3) the risk of damaging the cap during trans-

  port is practically eliminated As shown in Figure 5, these detergent containers are packed in cartons

  upside down Previously, when a cardboard fell violently

  slowly on a hard surface, like the one shown in 42

  in Figure 5, the impact could cause a major break

  bearing capsules of the prior art On the other hand, with the assembly according to the invention, the extreme edge of the neck of the container is in firm abutment against the wall of the bottom of the capsule, as shown in Figure 4, and the there is a considerable reduction in the damage suffered by the capsules

under comparable circumstances.

  4) the new structure is shaped so that

  require less plastic, a saving

ciable can thus be achieved.

  ) By pushing the upper wall of the capsule, its volume capacity is precisely controlled without modifying its external appearance. For example, in the case of a known detergent, the volume capacity of the capsule is 1/8 glass, and dosing accuracy is important

  and avoid freezing expensive detergent.

  The invention can be implemented in other particular forms, without going beyond its framework or its essential characteristics. This is why the embodiments described are to be considered from all points of view.

  as illustrative and not limiting.

Claims (4)

REVENDI CATIONS   1 plastic container closure cap   synthetic, monobloc and cup-shaped tick,   both an upper wall and a side wall which hangs from this upper wall, characterized in that the upper wall (24) is inserted in its center (26) to form a shallow inner boss (30) having a periphery   cylindrical surrounded at its base by a flat annular surface   area (29) located in a plane perpendicular to the periphery   of the boss, and on the inner surface of the side wall   line (25), an internal thread (34).   2 closure cap according to claim 1,   characterized in that the thread (34) is provided near mite of the boss (30).   3 Plastic closure cap   monoblock tick for container comprising an open annular neck (15), this capsule being in the form of a cup and comprising an upper wall (24) and an annular side wall (25) starting from the periphery of the upper wall, characterized in what it comprises, in the upper wall (24) a central zone (26) recessed in hollow which delimits with an adjacent peripheral zone of the side wall (25) an annular recess (32) intended to receive the open end of the neck (15) and comprising a flat bottom (33) adapted to receive, in abutment of integral surface, the end face (16), axially turned, of the open neck, this recessed area (26) of the capsule forming a boss (30 ) suitable for penetrating inside the open end   of the container neck and to fit into the interior surface   lower (17) of this collar; and on the internal face of the side wall (25) of the capsule, an internal thread (34) located near, but longitudinally downward, relative   to the annular recess (32) and adapted to cooperate by em-   housing with a corresponding external thread (19) located   around the neck, these parts being designed and arranged in a   çon that, when the capsule is placed on the neck and tightened by screwing, the boss (30) closes the opening of the neck and   the end face (16) of the latter comes into firm closing stop   be the flat bottom (33) of the annular recess (32) of the capsule. 4 closure cap according to claim 3,   characterized in that the boss (30) forms in the recess   dement (32) a substantially cylindrical surface (29) which cuts substantially perpendicularly the flat bottom (33) of this recess.   Closure cap according to claim 3, characterized in that the bottom wall (33) and the area (31) of the side wall which surrounds the recess (32)   and supports the thread (34) have a substantial thickness uniformly uniform.   6 Assembly comprising a container comprising a substantially cylindrical open neck having an extreme planar edge and an external thread adjacent to the open end of the neck, and a one-piece capsule, in the form of a cup and comprising a top wall (24) and a side wall   annular (25) starting from the periphery of the upper wall   lower, characterized in that it comprises, in the upper wall (24) a central zone (26) recessed in hollow which delimits with an adjacent peripheral zone of the side wall (25) an annular recess (32) intended to receive the open end of the neck (15) and comprising a flat bottom (33) adapted to receive, in abutment of integral surface, the end face (16), axially turned, of the open neck, this recessed area (26) of the capsule forming a boss (30) adapted to penetrate inside the open end   of the container neck and to fit into the interior surface   lower (17) of this collar; and on the internal face of the side wall (25) of the capsule, an internal thread (34) located near, but longitudinally downward, relative   to the annular recess (32) and adapted to cooperate by em-   housing with a corresponding external thread (19) located   around the neck, these parts being designed and arranged in a   çon that, when the capsule is placed on the neck and tightened by screwing, the boss, (30) closes the opening of the neck and the end face (16) of it comes into firm abutment against the flat bottom (33) of the annular recess (32) of the capsule, and the contact zone between the periphery of the boss (30) and the internal surface (17) of the neck cutting substantially the contact zone between the extreme edge ( 16) of the neck and the surface (33) of the bottom of the recess.