Improvements in Bottle Stoppers.
Year: 1899

page_text: Date of Application, 12th Oct., 1899-Accepted, 18th Nov., 1899
Improvements in Bottle Stoppers.
I, JULIUS SCHÄFER, of 42, Breite Strasse, Bonn, o/Rhine, in the Empire
of Germany, Manufacturer, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement;
―
This invention relates to a bottle-stopper of that type which allows the gases
or vapours evolved in the bottle through sterilizing to escape freely and which
then, owing to the internal rarefaction, are closed by the greater external pressure.
The bottle stopper according to this invention is formed by an india-rubber
cap provided with a ball-shaped valve head adapted to be compressed at the
collapse of the cap, under the internal rarefaction, by the action of two projections
formed upon the cap and which at the same time prevent it from being completely
drawn down into the bottle-neck. The closure of the valve-head is rendered all
the more perfect according to this invention by causing it to be compressed
directly by the two projections with an effort directed at right angles to the valve
slit or slot.
My invention will be readily understood from the following description with
reference to the accompanying drawing, in which
Figures and 3 are sectional elevations showing the stopper in its open and
closed condition respectively, and Figure 2 is a plan of the same.
The cap a of rubber, caoutchouc, or other suitable material is strengthened at
its lower end so as to form a firm seat upon the bottle-neck below the collar.
Upon this thicker portion of the cap are formed projecting lugs or eyes & through
which a wire e or tape is passed for the purpose of attaching the cap to the
bottle neck and so preventing it being lost.
Upon the rounded or dome-shaped portion of the cap a are provided two
diametrically opposed projections b b and centrally between such projection raises
a balle with a slot enabling it to act as a valve.
Figure 1 shows the position taken by the stopper while there is pressure in
the bottle and it is obvious that in this position the gases or vapours are allowed
freely to escape from the bottle. As soon as however rarefaction occurs in the
interior of the bottle the ball-shaped head is depressed and firmly pressed upon
the inner edge of the bottle-mouth. At the same time the head c is depressed
or flattened by the side-projections b b in such a manner as to close the valve
slot c. These projections b b moreover prevent the valve-heade from entering
completely into the bottle-neck. Thus the said projections. b b of the cap a
serve the twofold purpose:
1. Of closing the valve slot c¹, and
2. Of preventing the spherical valve-head from completely entering the bottle-
neck.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
Rattle steannans for sterilizing purposes
characterized by on plastic con pro

page_text: vided at top with a spherical valve-head e and at the sides with two diametrically
opposed projections which latter, on the ball-head c being depressed owing
to the rarefaction in the bottle depress or flatten the same in a direction at
right angles to the slot while at the same time preventing the ball-head from
completely entering the bottle-neck.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.