AN IMPROVEMENT IN THE MANUFACTURE OF COMPOSITIONS SUITABLE FOR PRINTING ROLLERS, PRINTING INK, AND FLEXIBLE MOULDS
Year: 1854

page_text: LETTERS PATENT to Thomas De la Rue, of Bunhill Row, for the Inven-
tion of "AN IMPROVEMENT IN THE MANUFACTURE OF COMPOSITIONS SUITABLE
FOR PRINTING ROLLERS, PRINTING INK, AND FLEXIBLE MOULDS."
Sealed the 26th January 1855, and dated the 24th November 1854.
ECIFICATION
Said
та
PROVISIONAL
ру
the Office of the Commissioners of Patents, with his Petition, on the
24th November 1854.
I, THOMAS DE LA RUE, of Bunhill Row, do hereby declare the nature of
the Invention for "AN IMPROVEMENT IN THE MANUFACTURE OF COMPOSITIONS
SUITABLE FOR PRINTING ROLLERS, PRINTING INK, AND FLEXIBLE MOULDS," to be
as follows:
This Invention consists of the application of glycerine in the manufacture
of compositions used when making flexible printing rollers, printing ink, and
flexible moulds.

page_text: WHEREAS Her most Excellent. Majesty Queen Victoria, by Her Letters
Patent; bearing date the Twenty-fourth day of November, 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 Thomas De la Rue, Her special licence that I, the said Thomas De la
Rue, my executors, administrators, and assigns, or such others as. I, the said
Thomas De la Rue, 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 term 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 "AN IMPROVEMENT
IN THE MANUFACTURE OF COMPOSITIONS SUITABLE FOR PRINTING ROLLERS, PRINTING
INK, AND FLEXIBLE MOULDS," upon the condition (amongst others) that I, the
said Thomas De la Rue, 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 sanic 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 Thomas De la Rue, do hereby declare the
nature of the said Invention; and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):
.
This Invention consists of the application of glycerine in the manufacture
of compositions used when making flexible printing rollers, printing ink, and
flexible moulds.
.
Having thus stated the nature of my said Invention, I will proceed to
describe the manner of performing the same.
".
The first part of my Invention consists of preparing and employing what I
call glycerine glue, for making those descriptions of printing rollers which have
heretofore been made of glue-and treacle; for which purpose-I-prefer-to-
employ cuttings of hides or skins known as "glue pieces." These are soaked
in clean water for several days, as has heretofore been practised, in order
thoroughly to cleanse them; they are then to be cut into thin slices and
placed in a copper, and as much glycerine as will cover the cuttings-is to be
added, and the whole are to be kept heated to a temperature of about
175° to 190° of Fahrenheit. When the cuttings are dissolved, the liquid is to
be run off into a vessel, and allowed to settle and cool. The composition will
then be in a condition to be again melted and cast into printing rollers, in like
manner to those heretofore made of a composition of glue and treacle, and

page_text: used by printers for inking rollers. In place of using "glue pieces," the com-
position may be prepared by employing glycerine to dissolve glue, isinglass, or
gelatine, the process being aided by a moderate heat, as when dissolving glue
in water.
I will now describe the second part of my Invention, which consists of
employment of glycerine as a vehicle for making printing ink, such ink being
fugitive, and-peculiarly applicable to the printing of bankers' cheques and other
documents by letter-press printing. For this purpose, I take precipitates of
logwood or other vegetable substances suitable for producing the coloring
matters desired, and I grind them up with glycerine as a vehicle to the proper
consistence of printers' ink, and I print with such inks in the ordinary manner
of letter-press printing.
I will now proceed to describe the third part of my Invention, which consists
of employing glycerine in the making of flexible moulds. For this purpose, I
employ the glycerine glue, prepared as above explained, which being melted is
formed on to and allowed to set on the surface, from which it is desired to
obtain a flexible mould. When set and cold, the mould may be removed in
like manner to when using other preparations for flexible moulds.
Having thus described the nature of my said Invention, and the manner of
performing the same, I would have it understood that I do not confine myself
to the precise details herein given; but what I claim is, the application of
glycerine in the manufacture of compositions used when making printing
rollers, printing ink, and flexible moulds.
In witness whereof, I, the said Thomas de la Rue, have hereunto set
my hand and seal, this Twenty-second day of May, in the year of our
Lord One thousand eight hundred and fifty-five.
Witness,
FREDERICK W. FRY,
110, Bunhill Row.
THOMAS DE LA RUE. (L.S.)