Bottles and jars – Neck – Structure to receive a particular closure
Patent
1997-03-19
1998-11-03
Cronin, Stephen
Bottles and jars
Neck
Structure to receive a particular closure
215 45, 215277, 215343, 220256, 220258, B65D 102
Patent
active
058296085
DESCRIPTION:
BRIEF SUMMARY
SUMMARY OF THE INVENTION
The present invention has essentially as its subject a self-centring seal intended to fit for example a container lid or cap.
It is also directed to a lid fitted with this seal as well as to a container comprising a lid provided with the said seal.
The fluid-tightness relative to the product contained in a container or to the vapor evolving from this product is generally obtained by compression of a seal accommodated in a capsule of the lid which may be screwed onto the open end of the container.
The seal is generally stuck or locked in the bottom of the lid, thereby leading to a certain number of inconveniences.
In effect, a great portion of the screwing torque is devoted to friction to the detriment of the compression of the seal hence of its fluid-tightness in particular in relation to the vapor.
This phenomenon is all the more substantial on those containers or pots as the diameter of the open end of which is large.
Moreover in case of surface or flatness defects of the open end of the pot, the seal may be hurt and its performances called in question again.
The present invention has as its object to remedy in particular the hereabove inconveniences by proposing a seal providing in any circumstances a good fluid-tightness, raising no problem of compatibility with the product in the container, remaining not very fragile, avoiding all problems inherent in frictions during the closing of the container and also solving all the problems of concentricity.
For that purpose, the invention has as its subject a seal for a lid or the like for example forming a cap which may be screwed upon the open end of any container whatsoever and of the type comprising a disk or a ring the periphery of which is provided with projecting means adapted to ensure the fluid-tightness through compression of the seal upon the open end of the container, characterized in that the said projecting means are constituted by an annular lip projecting from one face of the disk or ring and exhibiting at its end a substantially tapered bearing face.
According to a preferred embodiment, the substantially conical bearing face of the aforesaid lip converges towards the axis of the disk or ring in a direction away from the plane of the latter.
This seal is further characterized in that the other face of the aforesaid disk or ring exhibits plumb with the aforesaid lip an annular boss the bearing face of which exhibits the shape of a flattening.
The invention is also directed to a lid forming for example a cap which may be screwed upon any container or pot whatsoever and fitted with a seal meeting the hereabove characteristics, this lid being characterized in that the said seal is mounted in floating relationship in substantially parallel relation to the bottom of the lid into an annular groove of this lid the width of which is slightly greater than the thickness which the aforesaid disk or ring and the aforesaid boss are forming.
According to still another characteristic of this lid, when one screws it upon the container, the aforesaid tapered bearing face of the lip of the seal co-operates with a corresponding and complementary bearing face forming the open end of the container.
One should further remark here that that portion of the tapered bearing face of the seal which is closest to the axis of the aforesaid disk or ring is bearing upon a closing disk retained upon a shoulder provided on the open end of the container.
The seal as well as the container are made from polyolefin such as polypropylene for example whereas the lid is made from a styrene-acrylonitrile copolymer to permit a relative sliding of the seal with respect to the said lid.
This lid may be of the type with an oriented sealing through screwing over a quarter of a turn for example.
But further characteristics and advantages of the invention will appear better in the detailed description which follows and refers to the single attached drawing given by way of example only and showing in part and in axial section a container closed by a lid or cap provided
REFERENCES:
patent: 1793048 (1931-02-01), Brigel
patent: 2011140 (1935-08-01), Berglund
patent: 2916174 (1959-12-01), Orr
patent: 3924772 (1975-12-01), Magnani
patent: 5143236 (1992-09-01), Gueret
Cronin Stephen
Parfums Givenchy
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