Dispensing – With cutter and/or punch – To form dispensing opening in container
Patent
1988-03-02
1990-08-21
Huppert, Michael S.
Dispensing
With cutter and/or punch
To form dispensing opening in container
222541, 493213, 493345, 493929, B65D 1700
Patent
active
049498703
DESCRIPTION:
BRIEF SUMMARY
The subject of the present invention is a device for perforating a pack made of flexible synthetic material, of the type comprising a closing-off and pouring assembly consisting of a cylindrical shank and of a plug interacting with the said shank and equipped with means for cutting and perforating the wall of the pack as a result of screwing or pressure, in order to make it possible to poor a liquid contained in the said pack.
Devices of this type are known per se.
They have, for example, been the subject of U.S. Pat. No. 4,440,316 and the patent application FR No. 85.13,204 in the applicant's name.
These devices of the prior art are entirely satisfactory, but can still be improved in terms of the partial or complete cutting of the slug or of the region of film to be opened in order to obtain a pouring orifice.
The object of the invention is to overcome these disadvantages.
According to the invention, this result is achieved with a device for perforating a pack made of flexible synthetic material, of the type comprising a closing-off and pouring assembly consisting of a cylindrical shank and of a plug interacting with the said shank and equipped with means for cutting and perforating the wall of the pack as a result of screwing or pressure in order to make it possible to pour a liquid contained in the said pack, characterised in that it consists of a reinforcement of material projecting inwards relative to the base of the shank in the region of the zone to be cut, the said reinforcement being integral with the said shank.
As a result of this structure, all the disadvantages of the devices of the prior art are avoided, particularly the risk that the zone to be perforated wil be deformed as a result of an elastic effect instead of being actually cut.
In fact, the zone which is usually deformed as a result of elasticity or substantial elongation is engaged by the device according to the invention at a different angle, the force exerted by the cutting means being distributed and being supported not by a searing stress line, but by a surface offering greater resistance, naturally within limits compatabile with a manual force of which any user is capable.
The material reinforcement can be obtained in serveral ways.
Thus, for example, it can be used integrally with the shank of the closing-off assembly.
However, this structure requires a highly specific abutment for fastening the shank to the tubular sleeve forming the pack, and this presents problems because the shank is usually together with its plug. The inner zone is therefore inaccessible.
According to a preferred alternative embodiment, the reinforcement will be produced as a result of a creep of material in the region of the base during the fastening of the shank to the sleeve, the said base, before its fastening, incorporating by virtue of manufacture an annular bead which is substantially in the vertical extension of the shank and which creeps at least partially towards the inside of the shank and perpendicularly relative to this when the closing-off assembly is welded to the film sleeve during shaping.
The invention will be understood better from the following description made with reference to the accompanying diagrammatic drawings in which:
FIGS. 1a and 1b illustrate the first alternative embodiment of the invention;
FIGS. 2a to 2e illustrate a second preferred alternative embodiment of the invention;
FIGS. 3a and 3b show an alternative embodiment of the device of FIGS. 2a to 2e.
Reference must first be made to FIGS. 1a and 1b.
The closing-off assembly comprises essentially a cylindrical shank (1) ending, in its lower part, in a circular base (2).
This assembly is intended to be attached by welding to a film sleeve (3) at the moment when the latter is shaped on a mandril into individual bags intended for the packaging of nutritious or medical liquids.
An inner reinforcement (4) produced integrally with the shank is shown on this base arranged in the plane of the base.
FIG. 1b illustrates the welding of this assembly to the film by means of an abutment
REFERENCES:
patent: 3231444 (1966-01-01), Schick
patent: 4022258 (1977-05-01), Steidley
patent: 4355737 (1982-10-01), Pongrass
patent: 4362255 (1982-12-01), Bond
patent: 4493438 (1985-01-01), Rutter
Huppert Michael S.
Reiss Steven
Societe Generale des Eaux Minerales de Vittel
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