An Improved Method for Hermetically Closing Preserve Jars and the like.
Year: 1894

page_text: Date of Application, 2nd Nov., 1894
Complete Specification Left, 13th July, 1895-Accepted, 17th Aug.,
1895
TROYDONA
ם כר
An Improved Method for Hermetically Closing Preserve Jars
and the like.
Communicated by THE CONSERVEN-FABRIK MOMBACH-MAINZ VON DR. W.
NAEGELI, of Mombach, near Mayence ou Rhine, in the Empire of Germany,
Preserve Manufacturers.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of The Agency for
Foreign Patent Solicitors 6, Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster and High Holborn in the County
of Middlesex, Civil Engineer do horeby declare the nature of this invention
to be as follows:-
The devices hitherto employed for closing preservo jars or tho like vessels
containing sterilised substancos, or such as are to be preserved from contact
with the air, which closing devices are maintained closed by means of air pressure
or other means, and in which an indiarubber ring is used as a washer, have the
drawbacks that either the washer surfaces of the jar and the stopper must be
very exact and ground very level, or a very considerable pressure must be
employed.
The reason why the ordinary indiarubber rings instead of being air-tight, lic in
small inequalities, and more particularly in the frequently existing radial niches in
the surface of the necks of the bottles or jars, is owing to the fact that the pressure
on the indiarubber acts not only vertically, but also in a tangential direction on
the surface which is to be rendered tight, which tangential pressure becomes the
greater the more a particle of the indiarubber sinks into a recess of the surface of
the joint.
Now the present invention consists in employing those kinds of indiarubber,
which, when slightly warmed, become adhesive, and thus allow this drawback to be
remedied. By the adherence of the washer ring on the surface of the glass the
side tension is removed, and the pressure from above forces the indiarubber even
into the deepest inequalities of the surface of the glass.
But in addition to this filling up of the larger inequalities, that of the smaller is
extremely difficult, as without some further arrangeinent, neither the indiarubber
hitherto employed, nor the adhesive kind will be pressed into these smaller
inequalities.
These inequalities must therefore be filled up by amearing them with a liquid
which hardens but does not become brittle, and which is not soluble in the
contents of the vessel which is to be closed. A solution of colophony in spirit
will be found the most suitable substance for this purpose for some sorts of
preserves.
Experiments have shown that absolutely tight joints may be made with the two
modes of treatment hereinbefore described if a plate of ordinary window glass be
employed as a closing lid or stopper, and the closing surface of the bottle or jar be
ground level by hand on a rough flag stone or the like. The pressure under which
such a fastening remains firm is very small. The warmed plate may be pressed on
with a slight pressure of the hand.
Dated this 1st day of November 1894.
1

page_text: and the like.
A communication by THE CONSERVEN FABRIK MOMBACH-MAINZ VON DR. W.
NAEGELI, of Monbach, near Mayence on Rhine; in the Empire of Germany,
Preserve Manufacturers.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors & Lord Street, Liverpool, and 6 Bank Street, Manchester,
both in the County of Lancaster; 118 New Street, Birmingham in the County
of Warwick and 31 High Holborn in the County of Middlesex, Civil Engineer,
do hereby declare the nature of this invention. aud in what manner the same is to
be performed; to be particularly described and ascertained in and by the following
statement:-
The devices hitherto employed for closing preserve jars or the like vessels
containing sterilisel substances, or such as are to be preserved from contact
with the air, which closing devices are maintained closed by means of air pressure
or other meane, and in which an indiarubber ring. is used as a washer, have
the drawbacks that either the washer surfaces of the jar and the'-stopper' milst
be very exact and ground very level, or a very considerable, pressuro must be
employed.
The reason why the ordinary indiarubber rings instead of being air-tight, lie in
small inequalities, and more particularly in the frequently existing radial niches in
the surface of the necks of the bottles or jars, is owing to the fact that the pressure
on the indiarubber acts not only vertically, but also in a tangential direction on the
surface which is to be rendered tight, which tangential pressure becomes the greater
the more a particle of the indiarubber sinks into a recoss of the surface of the
joint.
Now the present invention consists in employing those kinds of indiarubber,
which, when slightly warmed, become adhesive, and thus allow this drawback to be
remedied. By the adherence of the washer ring on the surface of the glass the
sidu tension is removed, and the pressure from above forces the indiarubber even
into the deepest inequalities of the surface of the glass.
But in addition to this filling up of the larger inequalities; that of the smaller is
extremely difficult, as without some further arrangement: neither, ithe indiarubber
hitherto employed, nor the adhesive kind will be pressed into these smaller
inequalities.
These inequalities must therefore be filled up. by smearing them with a liquid
which hardens but does not become brittle, and which is not soluble in the
contents of the vessel which is to be closed. A solution of colophony in spirit
will be found the most suitable substance for this purpose for some sorts of
preserves.
Experiments have shown that absolutely tight joints may be made with the' two
modes of treatment hereinbefore described, if a plate of ordinary window glass be
employed as a closing lid or stopper, and the closing surface of the bottle or jar he
ground level by hand on a rough Hag stone or the like: The pressure under which.
Such a fastening remaius firm is very small. The warmed plate may be pressed on
with a slight pressure of the hand.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed; as communicated to me
by my foreign correspondents, I declare that what I claim is:-
An improved method for hermetically closing preserve jars and the like, ‹

page_text: consisting in smoothing the small inequalities of the rough closing surfaces by
means of a resinous solution and in placing between the smeared surfaces a ring of
adhesive india-rubber substantially as set forth.
Dated this 12th day of July 1895.
WM. P. THOMPSON & Co.,
Agents.