Improvements in Inking Pads for Stamping.
Year: 1889

page_text: Date of Application, 9th May, 1889-Accepted, 15th June, 1889
COMPLETE SPECIFICATION.
Improvements in Inking Pads for Stamping.
I, JOHANN EMANUEL BOHAO of 2 Felberstrasse Vienna in the Empire of Austria,
Post Office Official do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement
-
This Invention relates to ink or colour pads for stamping and it has for its object
to produce a pad which will absorb a small amount of colour or ink, on which the
colour or ink can be prevented from hardening so quickly as on ordinary pads, on
which the padding will not lose its elasticity through absorption of colour which will
deliver to the stamp a constantly regular amount of colour, which will be easily
taken to pieces for the purpose of renewing the cloth cover, and which will offer a
simple protection of the colour surface from dust and air when not in use.
The improved pad constituting the Invention is illustrated in plan at figure 1 and
in cross section on the line x y figure 1 at figure 2 and it consists of a holder or
shell A of brass or other material which receives the pad the four screws c, serving
to fix and hold the pad in the shell A. The pad itself consists of a wood or other
block into which the screws c are tapped. On the upper side of the block one or
more pieces of cardboard g are laid, and on this the pad proper d is cemented. The
pad consists of a block about half a centimetre thick and composed of gelatinous
material, india-rubber, or any other elastic non-absorbent substance. On this elastic
foundation one or more plies e of cloth or other texture are placed and the whole 1s
inserted into the shell or holder A. The colour or ink is then applied to the surface.
rubbed into the cloth, and distributed regularly over it, and the pad is ready for
inking the stamp. The pad proper consisting of a non-absorbent while at the same
time elastic material it is evident that the colour can only sink into the cloth cover,
and that therefore in the first place, much less colour is used than if the foundation
were porous in the second place, the stamping, owing to a small quantity of colour
being taken up, is much sharper and better, and thirdly, the renewing and changing of
the cloth cover can be accomplished in a very short time-When not in use the
apparatus is inverted so that the raised metal edge r rests on the table, and the
collection of dust on the inking surface e is prevented, exposure of the inking
surface to the air and by which the colour is dried being also by the Invention
partially obviated. The raised edge of the shell or holder A protects the hands
of the operator from being soiled in using the pad.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
An inking pad consisting of an elastic non-absorbent body d laid on or connected
to a non-elastic foundation and covered over with an absorbent material e the whole
being inserted in a holder A and secured thereon by screws c or equivalent means
substantially as described with reference to the drawings annexed.
Dated this Eighth day of May 1880
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.

page_text: Date of Application, 10th May, 1889
Complete Specification Left, 6th Mar., 1890-Accepted, 12th Apr., 1800
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE FARBWERKE VORMALS MEISTER LUCIUS AND
BRUNING, of Hoechst-am-Main, in the Empire of Germany, carrying on business
as Chemical Manufacturers ]
Manufacture of a New Coloring Matter of the Induline Series.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the County
of London, Fellow of the Institute of Patent Agents, do hereby declare the nature of
this invention to be as follows
-
This invention relates to the manufacture of a blue violet coloring matter, unknown.
up to the present time, the hydrochlorate of which is soluble in water and has the
composition CH18 N, H CI by heating a mixture of aniline, bydrochlorate of aniline
and amidoazobenzol producing compounds from which thus coloring matter can be
separated in the following manner.
1 The mixture of the indulines is boiled twice or thrice with a large quantity of
water and filtered, hydrochloric acid is added to the re-unitel filtrates, whereby the
whole of the new coloring matter is precipitated This is collected on a filter, pressed
and dried at a temperature of 70° to 80° C
2. This process for the separation is founded on the fact that of all the coloring
matters which form in the induline melt, the one mentioned above alone is capable of
forming a stable acetate. The mixture of the hydrochlorates of the indulines is mixed
with diluted soda lye for 12 to 24 hours, then the induline bases thus obtained are
collected on a filter and washed carefully with cold water The mixture of the bases,
in a still wet state, in suspended in 100 to 150 parts of water, acetic acid is added and
the whole is boiled, when the new induline C, H₁, N, will dissolve. It is filtered hot
and the filtrate is evaporated to one fourth of its volume when the acetate of the
induline C, Hig N, will crystallise forming blue leaflets with brown lustre It is
collected on a filter, pressed and dried at 80° C The acetate thus obtained is easily
soluble in cold water and is a coloring matter very valuable for dyeing and cloth
printing purposes
Instead of acetic acid other organic acids, such as tartaric acid, citric acid or levulic
acid may be employed giving equally good results
Dated this 10th day of May 1889.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION
Manufacture of a New Coloring Matter of the Induline Series.
I, OLIVER IMRAY, of No 28 Southampton Buildings Chancery Lane, in the County
of London, Fellow of the Institute of Patent Agents, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement.
-
This invention relates to the manufacture of a blue violet coloring matter unknown
up to the present time, the hydrochlorate of which is soluble in hot water and has the
composition C1, NH Cl such coloring matter being obtained by heating a mixture
of 5 parts of aniline, 39 parts of hydrochlorate of aniline and 2 parts of amidoazo-
benzol, whereby a compound is produced which contains the said coloring matter and
from which it can be separated by the following means.
1 The said compound, which contains a mixture of indulines, is boiled twice or
thrice with a large quantity of water and filtered; hydrochloric acid is added to

page_text: the re-united filtrates whereby the whole of the new coloring matter is precipitated
together with other indulines in the form of hydrochlorates.
This mixture is collected on a filter, pressed and dried at a temperature of from 70°
to 80° C.
2. The process for the separation of the new coloring matter from the above men-
tioned mixture is founded on the fact that of all the coloring matters which form
in the mixture, the new coloring matter alone is capable of forming a stable
acetate. The mixture of the hydrochlorates of the indulines is for this purpose
mixed with diluted soda lye for from 12 to 24 hours; the induline bases thus
obtained are then collected on a filter and washed carefully with cold water.
The mixture of the bases, in a still wet state, is suspended in 100 to 150 parts
of water; acetic acid is added and the whole is boiled, when the new induline C, H, N
will dissolve. It is filtered hot and the filtrate is evaporated to one fourth of its
volume when the acetate of the induline C, H18 N will crystallise, forming blue
leaflets with brown lustre. It 13 collected on a filter, pressed and dried at 80° C
The acetate thus obtained is easily soluble in cold water and is a coloring matter
very valuable for dyeing and cloth printing purposes.
Instead of acetic acid, other organic acids, such as tartaric acid, citric acid or levulic
acid may be employed giving equally good results
Instead of treating the hydrochlorates of the indulines in the first place with bases
and then with organic acids, the hydrochlorates of the indulines may be converted
directly into the salts of organic acids by boiling the same under pressure with aqueous
solutions of salts of organic acids, for example with acetate of sodium. In this case
the acetate of the base C24 H₁, N. remains in solution, and is separated in the
way described above sub. (2).
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
The herein described manufacture of salts of the induline base which are soluble in
water.
ABEL & IMRAY,
Agents for the Applicant.