FI66806C - LOCK OCH LOCK / BEHAOLLARE-KOMBINATION - Google Patents

Description

ItTfteTTl r »1« «ANNOUNCEMENT, sar \ r j & 3r & W i11) UTLACGNINGSSKRI FT 668 0 6 c (45) rc.'u-l’ii Uj Gru’.c ·! : .y 10 12 19S4 * (51) K *. *. / tafcCL B 65 D 51/16 FINLAND — FINLAND pi) Ρκ «« ιωι ^ -Ν «« ^ 783788 (22) HakamitpiM —Amafcninpdag 08.12./8 ( 23) AHoipaivi — GHdghMdag 08.12.78 (41) Translator interpreter - BU «H offwdf 16.03.80

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Patent- och raghtentyralaan '' AmMcan nte | d och «l ^ krtftm psMfcsrad; '' ° 4 (32) (33) (31) Pyyduqr «» «> * - B« »w pnortwc 15.09.78

England-England (GB) 36967/78 (71) Metal Closures Limited, Bromford Lane, West Bromwich, West Midlands B70 7HY, England-England (GB) (72) John Harry Guest, Sutton Coldfield, West Midlands, England anti-England (GB) (7 * 0 Oy Kolster Ab (5 **) Lid and lid / container combination - Lock och lock / behlil lare-kombinat ion This invention relates to lids for containers, more particularly to bottles with threaded necks, and combinations of such lids and containers.

When a bottle with a threaded lid containing a carbonated beverage is partially empty, the liquid is even more susceptible to shaking and disturbance, resulting in the release of carbon dioxide from the solution and considerable gas pressure in the bottle. It is known that the pressure and amount of gas in the container may be sufficient to throw the lid out of the hands when the lid is unscrewed. The cover is then possibly like a projectile, which can cause serious damage to objects or a person.

According to the present invention, a threaded lid molded from a plastic material, having an upper part and a downwardly directed flange threaded radially on its inner surface so as to form a helical screw thread brush, is known according to the characterizing part of claim 1.

2 66806

The operating pressure of the container can thus be relieved by removing the lid as the gas escapes over the thread by means of a notch or notches.

The notch or notches may have a radial depth equal to or less than the radial height of the thread-forming ridge.

It is advantageous to use several such notches. If the brush extends more than one turn, the notches of successive turns of the thread are preferably aligned axially with each other to shorten the gas outlet path.

In the container to which the lid joins during use, the screw thread brush may likewise be formed with a plurality of transverse degassing air notches spaced along its length, the notches of successive turns of the vessel thread being substantially axially aligned with each other.

The distances measured along the brush between adjacent notches may be different. For example, the distances between adjacent notches may be greater at one end of the brush than at the other.

An embodiment of the invention is shown in the accompanying drawings and will be explained in the following by way of example. In the drawings, Figures 1 and 2 show a lid according to the invention in a sectional side view and a bottom view, respectively, and Figures 3 and 4 show a side view and a plan view, respectively, of the neck of a container which can be used in conjunction with the lid of Figures 1 and 2.

Figures 1 and 2 show a lid 15 according to the invention. The lid is molded of a suitable plastic material and has an internal screw-thread brush 16 in which a series of cross-grooves 17 are formed at regular intervals along its length. The radial depth of the notches is equal to the radial height of the brush 16. The annular sealing rib 18 and the rib 19 and the annular surface 20 form a pressure-tight seal with the upper parts of the threaded neck of the container.

Figures 3 and 4 show the neck portion 21 of such a container, in this case a bottle, with a thread-forming helical brush 22. The above-thread neck portion 24 has a well-defined outer diameter of 3,6806 and forms a seal with the threaded lid surface 20, the rib 18 and the rib 19. When the lid is removed, the seal with the part 24 breaks, but at the same time the threads of the lid and the bottle are still tightly connected, so that the pressure in the bottle is relieved by gas flow past the sealing surfaces and through the notches 17 of the lid and around the bottle. The brush 22 of the bottle is preferably formed with aligned cross-sections 23, as shown in the figure, to shorten the gas discharge path, but if desired, the brush may be uniform.

Claims (4)

A plastic molded screw cap having a top and a downwardly directed flange threaded radially on its inner surface to form a helical screw-thread brush, characterized by a combination of a plurality of transverse degassing air grooves (17) formed in the brush spaced apart along the length of the brush an upper portion (18; 20) above the tea, adapted to form a gas-tight seal with the container around the mouth of the container. A screw cap according to claim 1, characterized in that each notch is formed by a rupture of the brush, so that the notches have a radial depth substantially equal to the height of the brush. Screw cap according to Claim 1, characterized in that the notches of the successive turns of the brush are aligned with one another. A combination comprising a vessel having an externally threaded neck having a plurality of transverse degassing air notches spaced apart along its length, the notches of successive turns of the thread being substantially aligned with each other, and a molded plastic threaded lid connected to each neck of the vessel; transverse degassing air grooves (17) spaced apart along the length of the lid screw ridge and an inner portion (18; 20) located above the lid screw ridge and adapted to form a gas-tight seal with the vessel around the mouth of the vessel.