IMPROVEMENTS IN THE MANUFACTURE OF FLEXIBLE TYPE INKING PADS AND DMTAA TO AND DEVIADO " USED FOR STAMPING AND PRINTING LETTERS AND DEVI
Year: 1872

page_text: LETTERS PATENT to Hezekiahı Venman and Charles John Warne, both
of Gracechurch Street, in the City of London, for the Invention of
"IMPROVEMENTS IN THE MANUFACTURE OF FLEXIBLE TYPE INKING PADS AND
DMTAA TO AND DEVIADO "
PROVISIONAL SPECIFICATION left by the said Hezekiah Venman and
Charles John Warne at the Office of the Commissioners of Patents,
with their Petition, on the 28th December 1872.
.
We, HezekiahH VENMAN and Charles JohN WARNE, both of Grace-
church Street, in the City of London, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF FLEXIBLE
TYPE INKING PADS AND ROLLERS USED FOR STAMPING AND PRINTING LETTERS AND
DEVICES," to be as follows:-
The feature of novelty of this Invention consists in compressing un-
cured caoutchouc in moulds made of plaster, metal, paper pulp, or other
suitable material, in accordance with the letters, words, or devices
required to be produced, and afterwards curing it as hereafter described.

page_text: According to the method heretofore practised of manufacturing flexible
type the flexible composition or mixture employed to produce such said
type has failed in practice in consequence of such said composition or
mixture being injuriously affected by extreme pressure, also by heat and
the contact of acids and water therewith. Now the object and intention
of this Invention is to remedy these objections, and render such type
more durable, permanently flexible, and not capable of being injuriously
affected either by extreme pressure, heat, water, or certain acids, which
we propose to accomplish by the following means:-We form a mould
either of plaster, metal, paper pulp, or other suitable material, of the
required size and shape, with a loose or separate top and bottom. Into
this mould we place the die, and then place the uncured caoutchouc in
the said mould. We then proceed to exert pressure on the said top, and
consequently on the india-rubber that is in the said mould. The pressure
may be effected by a screw or other convenient means. Whilst the
india-rubber is kept under pressure we place it and the mould in a boiler,
and proceed to cure the india-rubber in the manner usually practiced in
the manufacture of mineralized or vulcanized india-rubber. When cured
the india-rubber may be mounted on wood, cork, or other suitable
material ready for use.
Flexible type made in this improved manner may be used in the same
manner and for the same purposes as the flexible type now in use, but
may be used for many other purposes for which flexible type as hereto-
fore manufactured is unfit, namely, for aqueous, acid, and alkaline
preparations employed for transferring impressions.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Hezekiah Venman and Charles John Warne in the
Great Seal Patent Office on the 28th June 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, HEZEKIAH
VENMAN and CHARLES JOHN WARNE, both of Gracechurch Street, in the ;
City of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date. the Twenty-eighth day of December, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-

page_text: cessors, give and grant unto us, the said Hezekiah Venman and Charles
John Warne, Her special licence that we, the said Hezekiah Venman
and Charles John Warne, our executors, administrators, and assigns, or
such others as we, the said Hezekiah Venman and Charles John Warne,
our 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 Ircland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
THE MANUFACTURE OF FLEXIBLE TYPE INKING PADS AND ROLLERS USED FOR
STAMPING AND PRINTING LETTERS and Devices," upon the condition (amongst
others) that we, the said Hezekiah Venman and Charles Jolin Warne,
our executors or administrators, by an instrument in writing under
our, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the samo 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 we, the said Hezekiah Venman and Charles
John Warne, do hereby declare the nature of our 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 feature of novelty of this Invention consists in compressing
uncured mineralized caoutchouc in moulds made of plaster, metal, paper
pulp, or other suitable material, in accordance with the letters, words, or
devices required to be produced, and afterwards curing it, as hereafter
described.
According to the method heretofore practised of manufacturing flexible
type the flexible composition or mixture employed to produce such said
type has failed in practice in consequence of such said composition or
mixture being injuriously affected by extreme pressure, also by heat and
the contact of acids and water therewith. Now the object and intention
of this Invention is to remedy these objections, and render such type
more durable, permanently flexible, and not capable of being injuriously
affected either by extreme pressure, heat, water, or certain acids, which
we propose to accomplish by the following means:-We form a mould

page_text: either of plaster, metal, paper pulp, or other suitable material of the
required size and shape, with a loose or separate top and bottom. Into
this mould we place the die, and then place the uncured mineralized
caoutchouc in the said mould. We then proceed to exert the pressure on
the said top, and consequently on the india-rubber that is in the said
mould. The pressure may be effected by a screw or other convenient
means. Whilst the india-rubber is kept under pressure we place it and
the mould in a boiler, and proceed to cure the india-rubber in the
manner usually practiced in the manufacture of mineralized india-rubber.
When cured and cleansed by boiling in soda lye, the india-rubber may
be mounted on wood, cork, or other suitable material ready for use.
Flexible type made in this improved manner may be used in the same
manner and for the same purposes as the flexible type now in use, but
may be used for many other purposes for which flexible type as hereto-
fore manufactured is unfit, namely, for aqueous, acid, and alkaline
preparations employed for transferring impressions.
Having now described and set forth the nature and object of our said
Invention for " Improvements in the Manufacture of Flexible Type
Inking Pads and Rollers used for Stamping and Printing Letters and
Devices," and the means by which it may be effected, we hereby declare 1
our Invention to consist in, and we claim, compressing uncured mineral-
ized caoutchouc in moulds made of plaster, metal, paper pulp, or other
suitable material, and afterwards curing the caoutchouc in its compressed
state by the well known means of manufacturing mineralized india-
rubber, substantially as above described.
In witness whereof, we, the said Hezekiah Venman and Charles
John Warne, have hereunto set our hands and seals, this Twenty-
sixth day of June, in the year of our Lord One thousand eight
hundred and seventy-three.