AN IMPROVEMENT IN TREATING FLUIDS CONTAINING COLORING MATTER TO OBTAIN THE COLOURING MATTER THEREFROM;
Year: 1840

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
PONTIFEX, of Shoe Lane, in the City of London, Coppersmith, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-eighth day of January, in the third year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
William Pontifex, Her especial licence that I, the said William Pontifex, my
exors, admors, and assigns, or such others as I, the said William Pontifex,
my exors, admors, or assigns, should at any time agree with, and no others,
from time to time and at all times during the term of years therein expressed,
should and lawfully might make, use, exercise, and vend, within England,
Wales, and the Town of Berwick-upon-Tweed, and also in all Her Majesty's
Colonies and Plantations abroad, my Invention of "AN IMPROVEMENT IN
TREATING FLUIDS CONTAINING COLORING MATTER TO OBTAIN THE COLOURING
MATTER THEREFROM;" in which said Letters Patent is contained a proviso,
obliging me, the said William Pontifex, by an instrument in writing under my
hand and seal, particularly to describe and ascertain the nature of my said
Invention, and in what manner the same is to be performed, and to cause the
same to be inrolled in Her said Majesty's High Court of Chancery within six
calendar months next and immediately after the date of the said recited Letters
Patent, as in and by the same, reference being thereunto had, will more fully
and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
William Pontifex, do hereby declare the nature of my said Invention
to consist in evaporating such fluids as contain coloring matter fit for dyeing,
printing, or other manufacturing purposes, in vacuo, in order to obtain the
same in a concentrated or in a dry form, as may be most suitable to the
purpose for which the said coloring matter is required, without injuring
the color or other properties thereof by carbonization, or other injury arising
in any way from exposure to greater heat than is necessary for the purposes
aforesaid; and in further compliance with the said proviso, I, the said William
Pontifex, do hereby describe the manner in which my said Invention is to be
performed by the following statement thereof, that is to say :-
2
I provide an ordinary vacuum pan,. or a vessel in which a good vacuum can
be kept up during the process of evaporation, in which I place the fluid con-
taining the said coloring matter, and having applied heat in the usual manner
to it, I work my exhausting apparatus more or less rapidly, according as the
steam which is to be got off is more or less rapidly disengaged, taking care
always to keep up a good vacuum. If a decoction of logwood, or, as it is
generally called, logwood dye, for instance, is the fluid to be treated on my
patent plan in vacuo, I should not keep it in the pan till it became in a
viscid state; but when I had evaporated so much of the water as to reduce the
remaining portion in the vacuum pan to a state of hyper-saturation, I should
draw it off and let it settle for a while, when a sediment will form, and the
fluid remaining above this sediment should be poured carefully off and returned
to the boiler, the sediment being allowed to dry, and so kept, or brayed in a
mortar to a fine powder for use. Other fluids may be evaporated until theý
assume viscid form, all depending upon the use which the coloring matter is
to be applied to afterwards; but whereas I claim as my Invention, concen-
trating the coloring matter, contained in fluids, and required for manufacturing
purposes by applying heat to, and thus evaporating or partially evaporating the
said fluids in vacuo, whereby I obtain a highly concentrated coloring extract or
dye colouring powder without any injury to the color from carbonization, or other
damage inevitably occasioned by the application of heat in the ordinary way;
and obtain it also in a more portable as well as pure state for use.
And such
my Invention being, to the best of my knowledge and belief, entirely new and
never before used within that part of Her said Majesty's United Kingdom of
Great Britain and Ireland called England, Her said Dominion of Wales, or
Town of Berwick-upon-Tweed, and also in all Her Colonies and Plantations
abroad, I do hereby declare this to be my Specification of the same, and that
I do verily believe this my said Specification doth comply in all respects fully

page_text: and without reserve or disguise with the proviso in the said herein-before in
part recited Letters Patent contained; wherefore I hereby claim to maintain
exclusive right and privilege to my said Invention.
In witness whereof, I, the said William Pontifex, have hereunto set my
hand and seal, this Twenty-eighth day of January, in the year of our
Lord One thousand eight hundred and forty.
AND BE IT REMEMBERED, that on the Nineteenth day of June, in the
year of our Lord 1840, the aforesaid William Pontifex came before our said
Lady the Queen in Her Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained and specified, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Inrolled the Nineteenth day of June, in the year of our Lord One thousand
eight hundred and forty.