FR2521101A1 - SAFETY CLOSURE FOR BLOW-TYPE PLASTIC CONTAINERS - Google Patents

Abstract

THE INVENTION CONCERNS A SAFETY CLOSURE 1 FOR CONTAINERS 2 IN BLOWN PLASTIC MATERIAL, INCLUDING A CAP 5 WITH SAFETY TAPE 8 SCREWED ON THE NECK 3 OF THE CONTAINER, BOSSES 15 OF THE CONTAINER ENGAGING IN HOUSINGS 14 OF THE STRIP. THE PROBLEM RESOLVED CONSISTS OF AVOIDING THE TEARING OF THE STRIP WHEN THE CAP IS IN PLACED DURING BOTTLING. THE CLOSURE IS CHARACTERIZED IN THAT THE THREADS 10A, 11A OF THE PLUG 5 AND THE NECK 3 HAVE A SAW-TOOTH SECTION WITH OBLIQUE SIDES 12, 13 DIRECTED TO THE RESPECTIVE EDGES 6, 4 OF THE PLUG 5 AND THE NECK 3. L THE INVENTION IS APPLICABLE TO CONTAINERS IN PLASTIC MATERIAL OF THE BLOWN TYPE.

Description

i 1/2521101 "Safety closure for containers made of pastic material

blown type ".

  The subject of the present invention is an iron

  safety barrier, particularly suitable for plastic containers of the blown type, comprising a cap with a cap, a safety strip secured to the cap by a line of weakness, a thread made internally in the cap, a thread made externally on the neck of the container and conjugated with the thread of the cap, a

  series of axial housings made in the lateral surface

  The top of the strip and a series of axial bosses made around the perimeter of the container neck and conjugates of the series of housing.

  As is known, is separated by

  during the first opening, the cap of the test strip

  along the weakening line.

  Such closures are, in general,

  are satisfying and serve the purpose for which they are widely used. Indeed, the finding that the cork is

  cap and the strip are secured to each other

  the container has never been opened, and therefore its

  held is the original content in quantity and quality.

  These closures, however,

  known convenient related to the operation of setting up the nouchon

  on the container at the time of bottling.

  So that we can arrange the cap with its strip on the neck of the container, the housing and the bosses are bisautês in the direction of screwing and the line

  weakening is arranged in such a way as to tear itself

when screwing.

  However, despite these precautions, it sometimes happens that at the time of the introduction of the stopper, the strip separates from the stopper by tearing This of course causes a waste and the need to set up another stopper, naturally with an interruption the regularity of the market

bottling cat.

  The object of the present invention is to create a closure of the type indicated in the preamble and presenting

  characteristics of structure and functioning of

  ture to avoid the disadvantages mentioned This closure must be able to be put in place easily safis no

  risk of inadvertent tearing between the cap and the bandelet-

you during the set up.

  The invention relates for this purpose to a

  of the above type, characterized in that the screw threads of the cape cap and the neck of the container comprise threads with sawtooth section, the oblique sides of the sawtooth section being directed towards the respective edges of the plug

and collar.

  According to an advantageous embodiment, the threads have a predetermined limited value step and are

  multi-threaded type with a high and predetermined number of nets

completed.

  According to another preferred embodiment

  tagged, the oblique sides of the section of at least one of the

Threads are curved.

  The invention will be better understood with regard to

  the description below and the attached drawing showing an example

  In this drawing, FIG.

  unique is a partial sectional view and with the

  adorned with a closure according to the invention.

  In the figure, 1 has been designated

  of a safety closure according to the invention

  closure is intended for a container 2 of the plastics type

  blown tick, having a neck 3 delimited by an edge 4

  The closure 1 comprises a cap

  chon 5 having an edge 6 On the edge 6, the cap 5 is secured to a safety strip 8 by means of a line of weakening peripheral 7 In the example considered the line of weakness 7 is materialized by a succession

of incision lines 9.

3 2521101

  In the cap with cap 5 is made internally a filleting 10, while f iletage 11 conjugate

  the first is made externally on the neck 3 of the container 2.

  The threads 10 and 11 are of the type

  In the example shown, in particular, the threads are six in number with a pitch of 8 mm. They thus have an apparent pitch of value.

limited to 1.3 mm.

  The threads 10 and 11 comprise threads 1 Oa and 1a with a sawtooth section, in which the

  oblique sides, designated respectively by 12 and 13, are

  the threads 10a have a height h equal to 0.6 mm. In addition, the oblique sides 12 of the section of the threads i O a are bulged with a radius of 10 mm. In addition, the sides of the sawtooth section of the threads i O a which are opposed to the sides 12, and which are indicated in the figure by 17, are

  concave with a radius of curvature R 2 equal to 0.6 mm.

  Reference numeral 14 designates

  axial arrangements belonging to a series of dwellings practiced

  in the inner side surface of the strip 8

  numerical reference 15 designates axial bosses belonging to a

  series of bosses made externally on the collar 3 of the recess

  2, these bosses being conjugated housing 14 means

  quite conventional are planned to ensure the

  2 These means consist of an appen-

  elastically deformable thin tubular dice, designated by 16,

  protruding from the bottom of the cap 5 and intended to penetrate

  in the neck 3 of the container 2 with a force of application

appropriate.

  During bottling, the farm

  safety device 1 according to the invention is immediately and

  easily put into action simply by putting into

  axial rection, with a suitable force in the direction of the arrow F, the plug 5 and the associated strip 8 with the neck 3

  container 2 until the cap is completely

pledged on the collar.

  During this operation, the oblique sides of the threads constitute mutual entry surfaces which cause elastic deformation in the radial direction of the plug and the neck, this deformation being sufficient for the threads to pass each other on the other. 'other. When the cap is engaged, the threads and 11 are in normal engagement.

bosses 15 are in mutual engagement.

  Due to the limited value of the step, the

  that the threads are not in normal

  that the cap is engaged is virtually excluded.

  Thanks to the bulging of the oblique sides 12, the force required to engage the plug 5 on the neck 3 is very limited and that it is possible to set up the plug of the closure according to the invention on blown containers,

  even if they are relatively thin and likely to

sea.

  The opening of the container is normally effected

  made by unscrewing the cap 5 Since the strip 8 can not rotate due to the engagement of the bosses 15 in the housing 14, the separation between the cap 5 and the

  strip 8 takes place, during the first unscrewing of the cap,

  the line of weakness, as desired.

  All the following screw connections are made quickly thanks to the presence of several

  threads in the threads 10 and 11 Similarly, the commitment of the

let them be easy.

  The description above highlights that

  the closure according to the invention provides the desired benefits

  in its application to the container at the time of setting

  teilles, which takes place very quickly and without difficulties.

  We also obtain, of course: a simplification

  devices so far used for the implementation of

  corks as well as regular and uninterrupted

  interrupted bottling lines.

_ 5 2 _

Claims (3)

  1) Safety closure (1) for reclining   plastic bags (2) of the blown type, comprising a cap (5), a safety strip (8) secured to the cap by a weakening line (7), a thread (10) made internally in the cap hooded, threaded   (11) made externally on the neck (3) of the container and   for the thread (10) of the plug, a series of axial housings (14) made in the inner lateral surface of the strip   (8) and a series of axial bosses (15) made on the   turn of the neck (3) of the container (2) and conjugates of the series of   (14), characterized in that the threads (10, 11) of the cap (5) and the neck (3) of the container (2) comprise   threads (1 Oa, 11 a) with sawtooth section, the obliquely   (12, 13) of the sawtooth section being directed towards the   respective edges (6,4) of the plug (5) and the neck (3).   2) Closure according to claim 1,   characterized in that the threads (10,11) have a predetermined limited value step and are of the multi-thread type (10a, 11a)   with a high and predetermined number of nets.   3) Closing according to claim 2,   characterized in that the oblique sides (12) of the section of   at least one (10) of the threads are curved.