IMPROVEMENTS IN THE MANUFACTURE OF CORKS, BUNGS, AND OTHER STOPPERS
Year: 1884

page_text: I, HENRY GEORGE JACOBSEN, of N° 6 John's Lane, Leith, in the County of
Midlothian, North Britain, Cork Merchant do hereby declare the nature of the
said invention for "IMPROVEMENTS IN THE MANUFACTURE OF CORKS, BUNGS, AND
OTHER STOPPERS" to be as follows:-
My Invention relates to the manufacture of Corks, Bungs, and other analogous
Stoppers from cork or corkwood which is too thin to be used for this purpose
alone.
In practising my Invention I take such thin or inferior cork or cork wood, (after
it has been cut into pieces of suitable size and called squares), and remove with a
saw or equivalent means, the "bark" or useless portion of the bark so as to obtain
a smooth and level surface on each piece, and apply or coat over such surfaces with
a varnish consisting of caoutchouc or raw India rubber dissolved in bi-sulphide of
carbon or other solvent of India rubber.
When two, or more, pieces of cork or corkwood so treated are compressed the
varnish cements them firmly together and they become a mass equal or nearly
equal in value to so much good cork.
The cemented masses of cork or corkwood are then subjected to heat for such
time as is necessary to remove the bi-sulphide of carbon or other solvent used which
is volatilized leaving the cork or cork wood so treated free from smell
The cork or corkwood thus treated is used for the manufacture of Corks, bungs,
or other analogous Stoppers.

page_text: COMPLETE SPECIFICATION.
I, HENRY GEORGE JACOBSEN of No. 6 John's Lane, Leith, in the County of
Midlothian, North Britain, Cork Merchant, do hereby declare the nature of my said
invention for IMPROVEMENTS IN THE MANUFACTURE OF CORKS, BUNGS AND OTHER
STOPPERS, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My said Invention relates to the manufacture of corks, bungs and other
analogous stoppers from cork or corkwood which is too thin to be so profitably
used for these purposes unless under my Invention.
In practising my Invention, I tako such corkwood and remove with a saw, knife
or other equivalent means, the "back" that is to say, the weathered or useless
portion of the "back Bo as to obtain two or more surfaces which will practically
fit together.
(To these surfaces I apply varnish consisting of India rubber or caoutchouc
dissolved in such solvents as will volatilize when the surfaces so treated are exposed
to the air (heated or not heated) leaving the caoutchouc or India rubber as adhesive
surfaces. I prefer to use bi-sulphide of carbon as the most convenient solvent.
When two or more pieces of cork or corkwood so treated are, after a short
interval, joined, they become firmly cemented together and form a mass of cork-
wood equivalent to the firm and thick varieties from which corks and bungs or
analogous stoppers can be cut.
The cork or cork wood thus treated is then cut into the shapes proper for corks,
bungs, or other analogous stoppers..
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
The construction of corks, bungs and other analogous stoppers made of two or
more pieces of corkwood which have been united together substantially in the
manner and for the purposes herein before described.
Dated this Sirth day of Man 100%