FR2687644A1 - WARRANTY CLOSURE FOR BOTTLES. - Google Patents

Abstract

Guarantee closure (1) for bottles and the like, which securely signals that the bottle has been opened, which includes a cap-shaped stopper (2), a guarantee strip (3), a pre-break line ( 4) formed between the cap-shaped plug (2) and the guarantee strip (3), a thread (8) formed inside the cap-shaped plug (2) and a flange (11) formed at the inside the guarantee strip (3), the latter being subdivided into sectors (12) of substantial thickness and inclined upwards and into empty intervals (13).

Description

i The present invention relates to a warranty closure for bottles

  and the like of the type comprising a cap-shaped stopper, a guarantee strip, a pre-breaking line formed between the cap-shaped stopper and the guarantee strip, a thread formed inside the stopper or a cap. flange

  practiced inside the warranty strip.

  The present patent application also relates to a mold for the injection molding of a fermeturo according to the invention, as well as a method for the

  realization of this closure by means of said mold.

  As is known, the closures of the type mentioned above are placed on a bottle in such a way that the thread of the cap-shaped stopper engages in a corresponding thread formed in the bottle and the rim can engage in a groove formed in the bottle and abuts against a shoulder of this groove when unscrewing the cap-shaped stopper, so as to cause the rupture of the pre-rupture line and to separate the strip

of the cap-shaped cap.

  In known closures, the edge of the strip is produced in the form of a deformable annular tongue which is oriented downwards when the closure is molded and which is then brought upwards when the closure is applied. the bottle, so that this tab, once brought up, can B 'engage when unscrewing the cap-shaped cap in

the shoulder of the bottle.

  This solution offers a rim which is not very robust, which is why in certain cases it can happen that this one does not have the force to cause the rupture of the line of pr 6-rupture and to hold consequently the band on the bottle when the cap is unscrewed In this case, the guarantee band, instead of separating from the cap, follows it during the

unscrewing.

  It has been suqggré to r 6 align the rim with an upper application plane so as to allow the extraction of the male part of the mold and to provide, outside the strip, a shoulder against which an annular abutment rests in order to retain the strip during the extraction of the male part from the mold, thus protecting the line from

  pre-rupture against any effort exerted on it.

  this solution offers a fairly robust rim but which is not strictly reliable as regards its capacity to abut against the shoulder of the bottle without coming to overlap it. Furthermore, this solution requires

a fairly complicated mold.

  The problem which is the basis of the present invention is to design a closure which exhibits structural and functional characteristics capable of overcoming the drawbacks mentioned above. This problem is solved by a closure of the type mentioned which is characterized by the fact that the flange is

  subdivided into sectors spaced by voids.

  Other features and benefits of the

  present invention emerged from the description which goes

  follow from a preferred embodiment, given & indicative but not limiting, with reference to the accompanying drawings, in which: FIG. 1 represents a perspective view of a guarantee closure according to the invention I FIG. 2 represents a sectional view of the closure shown in Figure 1, along line II-II Figure 3 shows a sectional view of the closure shown in Figure 1, along the line

III-III;

  4 shows a sectional view of the closure shown in Figure 1, along the line IV-IV I and Figure 5 shows a perspective view of the closure of Figure 1 & another stage of its manufacture. With reference to the figures, the digital ropère 1 designates, as a whole, a closing of guarantee this one is intended for a bottle or the like, having a throat delimited at its part

  upper by a shoulder, and an external thread.

  The closure 1 comprises a cap-shaped cap 2 and a strip of guarantees 3, between which a pre-breaking line 4 is formed, The cap-shaped cap 2 comprises a bottom, provided on the inside with a relief in star shape 6 and a cylindrical skirt 7 provided with an internal thread 8, the latter being intended to be associated with the thread

outside of the bottle.

  The thread 8 is subdivided into a plurality of threaded sectors, equal to each other, all designated by the reference numeral 9 and the number of which is equal to twelve in the example shown, these sectors having an angular opening A, being distributed 3 regularly in forming a thread and spaced by voids 10 whose angular opening B is slightly greater & A In the example,

A is 15 'and B is 16'.

  The guarantee strip 3 is provided inside a flange 11 which is intended to engage by snap-fastening in the throat of the bottle and to come to abut against its shoulder when the cap-shaped cap is unscrewed. The rim 11 is subdivided into a plurality of sectors which are equal to each other, defined by the numerical reference 0 12, the number of which is equal to twelve in the example shown, these sectors all having an angular opening A, each being two placed in correspondence with a respective thread saector 9 and being separated from each other by voids 13 with an angular opening B. 1 5 In this way each of the voids 13 is found one of the voids 10 is looked at. note that the sectors 12 of the rim have a substantial thickness, for example 1 mm, and are oriented upwards, namely towards the bottom 5 of the stopper

  cap-shaped, with an inclination of about 45 '.

  To obtain the closure 1 in one piece, by injection molding of a suitable plastic material, a mold 14 is used which comprises a female part 15, indicated in a broken line in the figure,

-25 and a male part 16.

  The male part of the mold comprises a central guide tube 17 whose axis is XX, a cylindrical body 18 fitted on the tube 17 and movable angularly and axially with respect thereto, and a handle 19 which is fitted on the cylindrical body and which is axially movable between an operational position and an extraction position. The guide tube 17 has at its upper part a star imprint 20 associated with the relief

star 6.

  The cylindrical body 18 has a plurality of projections, the number of which is equal to twelve in the example shown, all designated by the reference numeral 21, whose angular width is equal to A and which are spaced apart by recesses 22 whose width angular is equal to B. The projections 21 are delimited at the lower part by sections 23 of inclined conical surface of approximately 45 ', and are provided on the outside

  of impressions forming a thread 24.

  The sleeve 19 has a plurality of teeth, 12 in the example shown 6, all designated by the reference

  digital 25, which are associated with the recesses 22.

  Between one tooth and the other, the manohon is delimited by sections 26 of conical surface, inclined by approximately 'which define, with the sections 23, a gap 12 a of predetermined thickness, for example 1 mm, when

  the mancholn is in operational position.

  The teeth 25 have a smooth outer surface 27.

  With reference to an initial situation illustrated in FIG. 1, the female part 15 of the mold is engaged with the male part 16 of said mold in which the cylindrical body 18 is in a first position placed opposite the upper end of the rod. guide 17, and the sleeve 19 so is in the opdratiolnnelle position in which the teeth 25 are engaged

in the recesses 22.

  When the plastic has been injected, the formture is released from the slack Le by axially displacing the sleeve 19 from the operating position to the extraction position, so that the teeth 25 leave the

of course 22.

  At this moment, the cylindrical co: rps 18 undergoes an angular rotation of one step, 15 ′ in the example shown, in such a way that the: projections 21 come to occupy the place previously occupied by the

teeth 25.

  During this rotation, the thread-shaped impressions 24 leave the thread sectors 9 which have formed in the cap-shaped plug and the projections 21 leave the sectors 12 of the flange which

  are trained in the warranty band.

  At this moment, the cylindrical body 18 is moved from the initial position opposite the upper end of the guide rod to an extraction position, this movement then being followed by the guide rod. The female part of the mold is then put back in place

known manner.

  The main advantage of the invention lies in the fact that it makes it possible to obtain a feormetureo with a robust rim so as to come and engage in complete safety in the shoulder of the bottle and to cause

  certainly the breaking of the pre-

  rupture. Another advantage of the invention is to allow greater freedom of choice with regard to the plastic material of the closure, by including the

  high hardness plastics.

  Another advantage lies in the possibility of greatly increasing the rate of manufacture of closers in accordance with the invention. Indeed, the extraction of the male part of the mold only involves a limited rotation. This advantage is especially important in the case of large sizes with filetago

relatively long.

  Finally, a non-negligible advantage of the closure according to the invention is that it makes it possible to easily and immediately obtain a thread with voids allowing 1 degassing, namely the gradual exit from the OO * uo Tue AUT (* ep uo Tao D 3 ; Od ep elpno e su'p% ne-Tjpp senuaue; oo s; no; seun Fw AS ua TOT Tpout S 9 E Inflqlitou p snfsep-To e 1 FT; zp s eo Ouv 67 xe sep f eo = s T; qs - p UTV '== nod eu Tutop eo D sup: u 8 evd 4 oo ue 7 o Tuqoeq un' eouep TAV eano; ea eanq 3: eano, I ep ueuzotu ne sesnezef suoszsoq sepenb Td Ienbe ST 4 o Eto sune lz z. t Mt 9 z 89

Claims (7)

R E V E N D I C A T I O N S   1 Guarantee closure (1), for bottles and the like, of the type comprising a cap-shaped stopper (2), a guarantee strip (3), a pre-rupture line (4) formed between the stopper-shaped cap (2) and the guarantee strip (3), a thread (8) formed inside the cap-shaped plug (2) and a flange formed inside the guarantee strip (3), characterized by the fact that the rim (11) is subdivided into sectors (12) and into empty intervals (13) between these sectors (12).   2 closure according to claim 1, characterized in that said sectors (12) of the flange (11) have a significant thickness and are inclined towards   the cap-shaped plug (2).   3 Closure according to claim 2, characterized in that said thread (8) is subdivided into threaded sectors (9), in empty intervals (10) between these sectors (9) and that the threaded sectors (9) are located in   look at the sectors (12) of the rim (11).   4 Mold (14) for injection molding of a guarantee closure (1) of the type comprising a cap-shaped stopper (2), a guarantee strip (3), a pre-rupture line (4) formed between the cap-shaped plug (2) and the guarantee strip (3), a thread (8) made inside the cap-shaped plug (2) and a flange (11) made inside the guarantee strip (3), characterized in that it comprises a male part (16) having a cylindrical body (18) provided with projections (21) arranged so as to form a thread (24) and spaced apart by recesses (22), a sleeve (19) having teeth (25) associated with said recesses (22), the sleeve (19) being axially movable relative to the cylindrical body (18) between an operational position in which the teeth (25) occupy the recesses (22) and an extraction position in which the teeth (25) are placed outside the recesses ts (22), said cylindrical body (18) being angularly movable by one pitch of said thread (24) in order to bring, angularly, the projections (21) to the place occupied by the teeth (25) when they are in their first position, interstices (12 a) being formed between the projections (21) and the sleeve (19) when said cylindrical body (18) is in its operational position.   Mold according to claim 4, characterized in that the interstices (12 a) have a thickness important and are tilted.   6 mold according to claim 5, characterized in that the projections (21) are provided with threaded impressions (24) and that the teeth have an outer surface (27) smooth.   7 Method for molding a guarantee closure (1) of the type comprising a plug in the form of   cap (2), a guarantee strip (3), a pre-   rupture (4) formed between the cap-shaped plug (2) and the guarantee strip (3), a thread (8) formed inside the cap-shaped plug (2) and a flange formed at the inside the guarantee strip (13), characterized by the presence of a female part (14) and a male part (16) having a cylindrical body (18) provided with projections (21) arranged so as to forming a thread (24) and spaced apart by recesses (22), a sleeve (19) having teeth (25) associated with said recesses (22), by injecting the latter with plastic material by deformation of the closure (1) by axial displacement of the sleeve (19) relative to the cylindrical body (18) so as to extract the teeth (25) from the recesses (22), by the angular displacement of the cylindrical body (18) to bring the projections (21 ) at the location previously occupied by the teeth (25), and by the axial displacement of the body cyl indrique (18) for extract the projections (21).   8 Method according to claim 7, characterized in that on the projections (21) are provided impressions in the form of threads (24) and that on the teeth   smooth surfaces (27) are provided.