FR2688480A1 - COMPOSITE CAP. - Google Patents

Abstract

Composite closure for containers having a neck, and the like, characterised in that it comprises a core (1) in the form of an upturned cup, made from relatively inert and ordinary (inaesthetic) material, secured by moulding of a cap (2), made from relatively strong and attractive (aesthetic) material, forming the outside of the closure and continuing inside the axial recess (16) of the core via extensions (3) which fasten the closure onto the neck (18), or another similar element integral with a container (7).

Description

COMPOSITE CAP

  The present invention relates to the

  packaging It is more particularly aimed at

  plugs which can possibly serve as plugs, in particular

  ment for cosmetic or perfume containers where appearance, aesthetics, quality at least apparent, are important, as well as the weight which

  Often gives a flattering impression of solidity.

  The object of the invention is to enable the realization

  industrial caps with qualities

required at an advantageous cost.

  The subject of the invention is a composite cap for containers with necks and the like, characterized in that it comprises a core in the shape of an inverted cup, made of relatively inert and unsightly material, secured by molding a cap, made of relatively resistant material. and aesthetic, forming the outside of the cap and continuing inside the axial recess of the core by extensions which ensure the fixing of the cap on the neck, or other similar integral element

of a container.

  According to a particularly embodiment

  advantageous, the extensions of the cap are constituted

  killed by tongues parallel to the axis of the cap, a longitudinal marginal part of which is integral with the core, and the contiguous, centripetal and

  elastically deformable radially, is called to friction

  ter against the neck, or other similar element secured to the container. According to a variant, the extensions of the cap have a tapping called to cooperate with a thread of the neck, or other similar element secured to the container.

  The cap may preferably have nerves

  internal longitudinal vures ensuring the setting in rotation

  tion of the nucleus in the cap, in cooperation with

  complementary recesses of the nucleus.

  The aesthetic aspect is particularly assured

  when the cap forms the top, the lateral wall cy-

  lindrique, and the circumference of the opening of the cap, the extensions of the cap going up inside the axial cylindrical recess of the core on a part

only of its depth.

  It is generally advantageous if the nucleus pre-

  feel internal radial protuberances for wedging

  ends of the extensions of the cap.

  Excellent cohesion is obtained between the coif-

  fe and the nucleus when made of materials

  rials comprising a basic plastic material likewise

  nature, but loaded differently.

  Thus, the cap can be advantageously made

  seated in normal polypropylene while the core is in

  polypropylene weighed down by mineral fillers.

  A particular advantage of the invention lies

  in the possibility of making such caps entirely

  Rely in recyclable and / or biodegradable materials.

  The invention can be more clearly understood

  by examination and detailed description of the drawings

  appendices which represent an embodiment of the in-

  vention and a variant, chosen simply as

  examples among the many forms of execution,

  tations and variants of the invention conceivable by a

technician informed.

  In these drawings FIG. 1 is a schematic view, in elevation and in longitudinal section, along the line I-I in FIG. 2, of a sliding cap according to the invention; Figure 2 is a diametrical sectional view of the same cap, along the line II-II of Figure 1; and, Figure 3 is a view similar to that of the

  Figure 1, a screw cap, according to the invention-

  tion. In these figures, the corresponding elements are

  designated by the same reference numbers, possibly-

  dimensions and proportions

  respective items may not be

  respected for better readability of the drawings.

  The cap according to the invention, shown in Figures 1 and 2 is essentially composed of a core

  1 and a cap 2 The core, in the form of a return cup-

  born is joined by molding of the cap that surrounds it

  completely outside and extends into the hollow

  axial 6 of the core by four parallel extensions 3

  them to the axis of the cap and evenly distributed circumference-

  These extensions each consist of a tongue, a relatively thick longitudinal marginal portion forming heel 4, is enclosed in the inner wall of the core, while the contiguous marginal portion 5, relatively thin, protrudes freely outside the inner wall of the core. , in the axial recess

  6 The marginal parts 5 are flexible and elastic-

  radially deformable, which allows them to

  rer the maintenance, with gentle friction, of the cap on a cylindrical element integral with the neck of a container 7, represented here by a sheath 8 fitted with hard friction on a capsule 9, crimped on the neck of the container to fix a valve therein aerosol dispensing, or a small conventional pump, whose axial tube 10 is terminated by a push button 11 of manual actuation, housed freely

  in the bottom of the axial recess 6 of the core.

  Longitudinal ribs 12, spaced, coming from the internal face of the external wall of the cap 2 are enclosed, during molding, in the external lateral face of the core and in rotation secure the core and

The hairdo.

  The extensions 3 extend only over approximately the lower half of the depth of the cap Their

  ends 13 abut on radial protuberances

  dull core 1 which wedges them axially during the

  darkening of the sliding cap on the sleeve 8.

  To make this cap according to conventional techniques, we can start by first molding the core 1 with grooves corresponding to the housing of the heels 4 and ribs 12 of the cap.

  core in another mold for injection of the cap.

  The axial frustoconical recess 14 of the top of the core serves

  centering and holding the core in the mold

  jection as well as possibly the passage of the nozzle

  injection molding cap.

  We can also start by molding the cap before inserting it into a mold where we will inject the core. In the variant shown in Figure 3, the

  cap is screwed directly onto the neck 18 of a container

  pient 7 a It includes a nucleus enclosed in a coif-

  fe 2 a whose internal face of the internal extensions 3 a has a thread 16 complementary to the thread 15 of the container neck A sealing washer 17 is conventionally disposed at the bottom of the cap, bearing on

  the inner inner face of the nucleus According to the applica-

  or will be able to perform tapping, either in the to-

  tality of the external face of several separate extensions

  trimmed and spaced, either of a single inverted glove finger extension, the entire opposite face of which is in contact with the inner face of the core, as shown in

Figure 3.

  As a variant, the internal thread can be located in the longitudinal flexible marginal portions 5 of the extensions of the cap of the cap of FIGS. 1 and 2. It is advantageously possible to mold the cap of such caps according to the invention, in conventional polypropylene of shiny appearance, offering the possibility of beautiful colorings, a pleasant touch, and having the elasticity necessary to ensure a pleasant and lasting connection between the cap and a container. It is likewise possible to mold the polypropylene core weighed down to a density close to 2 by conventional mineral fillers -20 Thus, it will be possible to produce, at low cost and at good industrial rates, aesthetic caps of pleasant density which can be

fully recycled.

Claims (8)

  1 composite cap for containers with necks and the like, characterized in that it comprises a core (1) in the shape of an inverted cup, made of relatively inert and unsightly material, secured by molding a cap (2), of relatively resistant material and aesthetic, forming the outside of the cap and continuing inside the axial recess (16) of the core by extensions (3) which ensure the fixing of the cap on the neck (18), or the like secured to a container (7).   2 Cap according to claim 1, characterized in that the extensions (3) of the cap (2) are   constituted by tongues parallel to the axis of the capu-   chon of which a longitudinal marginal part (4) is integral with the core, and the contiguous marginal part (5), centripetal and elastically deformable radially, is called to rub against the neck (18), or other element   analog (8) integral with the container (7).   3 Cap according to claim 1, characterized in that the extensions (3) of the cap have a thread (16) called to cooperate with a thread (15)   neck (18), or other similar element integral with the container (7).   4 cap according to one of claims 1 to 3,   characterized in that the cap (2) has interior-   longitudinal ribs (12) ensuring the setting   in rotation of the core (1) in the cap (2), in cooperation   tion with complementary recesses of the nucleus.   Cap according to one of Claims 1 to 4,   characterized in that the cap (2) forms the top, the cylindrical side wall, and the periphery of the opening of the cap, the extensions (3) of the cap rising inside the axial cylindrical recess (6) of   core over only part of its depth.   6 Cap according to claim 5, characterized in that the core (1) has protrusions (13)   internal radial wedging ends of extensions elements (3) of the cap (1).   7 Cap according to one of claims 1 to 6,   characterized in that the core (1) and the cap (2) are   made of materials comprising a plas-   Basic tick of the same kind, but loaded differently.   8 Cap according to claim 7, characterized   in that the cover (2) is made of normal polypropylene   say that the core (1) is made of polypropylene weighed down by mineral fillers.   9 Cap according to one of claims 1 to 8,   characterized in that it is entirely made of material   recyclable and / or biodegradable materials.