CERTAIN IMPROVEMENTS IN PROVISIONAL
Year: 1854

page_text: LETTERS PATENT to Jacques François Henry Hypolite Hervé de Lavaur,
of Paris, in the Empire of France, and 4, South Street, Finsbury,
London, Gentleman, for the Invention of "CERTAIN IMPROVEMENTS IN
PROVISIONAL SPECIFICATION left by the said Jacques François Hypolite
Hervé de Lavaur at the Office of the Commissioners of Patents, with his
Petition, on the 4th September 1854.
I, JACQUES FRANÇOIS HYPOLITE HERVÉ DE LAVAUR, of Paris, in the Empire
of France, and of 4, South Street, Finsbury, London, Gentleman, do hereby
declare the nature of my Invention of "CERTAIN IMPROVEMENTS IN SECURING
WATERPROOF WRAPPERS OR COVERINGS USED IN PACKING GOODS" to be as follows:-
My Invention consists in the manufacture of a waterproof tissue. For
rendering the tissue waterproof, I employ a composition consisting of resin,
bitumen, gutta percha and talk, or of bitumen, gutta percha, & chloride of
calcium.
The waterproof tissue being applied, for example, in the interior of the case
or other receptacle, 1 should apply a band of the said waterproof tissue over
the ends at the angles of the case, and unite them together by means of the
said or other analogous adhesive composition.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Jacques François Henry Hypolite Hervé de Lavaur in the
Great Seal Patent Office on the 1st March 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JACQUES
FRANÇOIS HENRY HYPOLITE HERVÉ DE LAVAUR, of Paris, in the Empire of
France, and of 4, South Street, Finsbury, London, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourth day of September, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Jacques François Henry Hypolite Hervé de Lavaur, Her special license that
I, the said Jacques François Henry Hypolite Hervé de Lavaur, my executors,
administrators, and assigns, or such others as I, the said Jacques François
Henry Hypolite Hervé de Lavaur, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the terin therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for "CERTAIN
IMPROVEMENTS IN SECURING WATERPROOF WRAPPERS OR COVERINGS USED IN PACKING
GOODS," upon the condition (amongst others) that I, the said Jacques François
Henry Hypolite Hervé de Lavaur, by an instrument in writing under my
hand and seal, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Jacques François Henry Hypolite
Hervé de Lavanr, do hereby declare the nature of my said Invention, and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, that is to say:-
The Invention cousists in the manufacture of a waterproof tissue for lining
or covering the interior or exterior of cases or other receptacles, and envelopes
for goods to be protected from wet and humidity.
The tissue consists of paper, cloth, canvas, or any of the materials usually
employed for packing and lining packing cases, on which I apply one of the
two following compositions:-
:-

page_text: One ounce, troy, bitumen; quarter of an ounce, troy, gutta percha; one
tenth of an ounce chloride of calcium dissolved in water.
The choice of the composition and proportions in which it is to be employed
must be determined in some measure by the climate to which the goods are to
be sent, and by the nature of the contents. To ensure the resistance of the
composition to high temperatures, it may in some cases be expedient to replace
tale and chloride of calcium in the said composition by dry or wet argilaccous
carths, by oxides of metal, or insoluble salts. The above substances are mixed
by known processes, and reduced to a state of paste, which is applied either
on one side or on both sides of the paper, cloth, or other suitable material, so
as to ensure a perfect coating. The thickness of the layer may be varied
according to the durability required. To apply the waterproof tissue on the
interior or exterior of the case it is not necessary to heat it, as for the ordinary
pitched canvas for packing cases.
Having thus described the nature of my said Invention, and the manner of
carrying the same into effect, I would have it understood that I do not confino
myself to the precise proportions of the substances herein laid down, as the
same may be varied according to circumstances; but what I claim is, the
manufacture of a waterproof canvas, cloth, or paper, for lining or covering
cases or other receptacles, and coverings for goods to be protected from wet or
humidity, as herein-before described.
In witness whereof, I, the said Jacques François Henry Hypolite
Hervé de Lavaur, have hereunto set my hand and seal, this Sixteenth
day of February, One thousand eight hundred and fifty-five.
H. HERVE DE LAVAUR. (L.S.)