Year: 1887

page_text: Date of Application, 5th Mar., 1887.
Complete Left, 3rd Dec., 1887
Complete Accepted, 6th Jan., 1888.
We FREDERICK TOWLSON of New Basford in the County of Nottingham Bleacher
& Dyer and ERNEST WELDON of New Basford aforesaid Bleacher and Dyer do hereby
declare the nature of this invention to be as follows
--
This invention relates to the dyeing or printing of Cotton goods either in the piece.
or in yarn.
Material subjected to either of the processes at present in commercial use for the
dyeing or printing of aniline black liave usually one of two defects either the color is
perishable on exposure to light and air turning a greenish hue or it is not clean in
wear that is although the color is permanent in itself it easily rubs off the material on
to anything else against which it comes in contact.
The object of this invention is so to improve the process of dyeing or printing with
aniline blacks as to produce as a result a dyed fabric which will have a permanent
black color that will be clean-that is not rub off in wear.
It consists essentially of combining in one process some of the distinctive features
of the other two so that the material will first be treated by the principal stages in
the process which produce the permanent color and then subsequently by the finishing
stages now adopted in the other process which produce a clean color that will not rub
off by friction.
In carrying out the invention we propose to subject the material under treatment
to the action of Bichromate of Potash, Aniline oil and a suitable acid the goods are
wrung out of this and then dried or aged for a sufficient length of time after which
they may or may not (as found desirable) be passed through a hot bath composed of
Bichromate of Potash or some similar salt.
From our experiments we find that by this improved. or combined process we
obtain as a result a dyed fabric with a clean and permanent color.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Dyeing and Printing Aniline Blacks.
We FREDERICK TOWLSON of New Basford in the County of Nottingham Bleacher
and Dyer and ERNEST WELDON of New Basford aforesaid Bleacher and Dyer
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 dyeing or printing of goods manufactured from cotton
or other vegetable fibre either in the piece or in yarn.
Material subjected to either of the processes at present in commercial use for the
dyeing or printing of aniline black have usually one of two defects either the colour
is perishable on exposure to light and air turning a greenish hue or it is not clean in
wear that is although the colour is permanent in itself it easily rubs off the material
on to anything against which it comes in contact.
The object of this invention is so to improve the process of dyeing or printing with
aniline blacks as to produce as a result a dyed fabric which will have a permanent
ungreenable black colour which will not rub off or smear in wear.
It consists essentially of combining in one process some of the distinctive features
of the other two so that the material will first be treated by the principal stages in
the process which produce the permanent colour and then subsequently by the finishing
stages now adopted in the other which produce a clean colour that will not rub off by
friction.
In carrying out the invention the material (yarn or fabric) to be dyed is first
subjected in a bath to the action of bichromate of potash or soda, aniline oil and
hydrochloric or other suitable acid. The solution we prefer consists of:
Bichromate of Potash
Aniline Oil
2 lbs.
6 lbs.

page_text: After being printed in the ordinary way, with this preparation the goods are
passed to the ageing machine and aged as above described after the dyeing process.
When aged and dried they are steamed at a pressure of about half a pound for half
an hour or so and then soaped and dried.
By our improved or combined process we obtain as a result a material dyed or
printed with an ungreenable stainless black. And in the dyeing of yarns we find
that the yarn does not thicken as is the case in some of the present processes.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we wish it to be understood
that we are aware that a solution of Aniline oil, or salt, acid and bichromate of potash
or soda are used in dyeing known in the trade as the direct oxidation process also that
the process of ageing the material has been applied after being dyed in a solution of
chlorate of potash a salt of copper, acid, and aniline oil (known as the aged or padded
black) and that we make no specific claim for either of the separate steps or processes
but that what we claim is
1. In the dyeing or printing of aniline black the use of a bath or solution of
bichromate of potash aniline oil and hydrochloric acid, in conjunction with the sub-
sequent process of ageing substantially as and for the purposes described.
2. The improved or combined process of dyeing or printing aniline black which
consists in (a) treating the material with a solution of bichromato of potash (or soda)
aniline oil and hydrochloric acid, (b) ageing at a low temperature and (c) steaming
at a low pressure or washing in boiling water with or without bichromate of potash
or other salt and subsequently soaping and drying substantially as herein described.
Dated this 2nd day of December 1887.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester,
Patent Agents.