Year: 1887

page_text: I, WILLIAM JULES SAMUEL GRAWITZ of 24 Rue d'Alsace-Lorraine, St. Maur-les-
Fossés (Seine) France, Civil Engineer do hereby declare the nature of this invention
to be as follows:-
My Invention relates to dyeing vegetable and animal textile materials before
spinning.
In carrying out my invention, I employ a hollow cylinder of wire-work around which
I wind the cotton or the wool in the lap or fleece as it comes from the scutcher or in
the form of slivers from the carding or combing machine as the case may be, and
retain them in position by a second open work cylinder concentric with the first.
I thus form a sort of very large bobbin which is then keyed upon a horizontal shaft
mounted in bearings over a dye-vat in which the bobbin is partly immersed and
the whole of the operations of boiling, mordanting, dyeing or brightening, and
soaping the textile materials then proceeded with, by imparting rotary motion to the
bobbin on its horizontal axis in the course of which operation the fibres suffer no
disarrangement and can afterwards be submitted to the ordinary operations of
spinning.
Good results are obtained by using a rectangular vat 3 feet 3 inches in length, 2 feet
8 inches in breadth, and 2 feet 2 inches in depth, the diameter of the inner drum or
core of the bobbin being 18 inches and that of the cylindrical casing 2 feet 2 inches.
Instead of a single bobbin, several smaller bobbins may be mounted upon the same
horizontal shaft.
100
W. J. S. GRAWITZ.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: I WILLIAM JULES SAMUEL GRAWITZ of 24 Rue d'Alsace-Lorraine, St. Maur-les-
Fossés (Seine) France Civil Engineer, 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 :-
My invention relates to dyeing vegetable and animal textile materials before
spinning.
In carrying out my invention, I may wind the cotton or the wool (in the lap or
fleece as it comes from the scutcher or in the form of slivers from the carding or
combing machine, as the case may be) around a skeleton cylinder of metallic lattice
or wire work and retain the textile materials in position thereon by a second open
work cylinder concentric with and enveloping the first. I thus form a sort of very
large bobbin which is then keyed upon a horizontal shaft mounted in bearings over a
dye-vat in which the bobbin is partly immersed and the whole of the operations of
boiling, mordanting, dyeing or brightening, and soaping the textile materials then
proceeded with, by imparting rotary motion to the bobbin on its horizontal axis, in the
course of which operation the fibres suffer no dissarangement and can afterwards be
submitted to the ordinary operations of spinning.
Good results are obtained by using a rectangular vat three feet three inches in
length, two feet eight inches in breadth, and two feet two inches in depth, the
diameter of the inner drum or core of the bobbin being eighteen inches and that of
the cylindrical casing two feet two inches.
Instead of winding the textile materials on the inner cylinder they may be disposed
in any other convenient way in the annular space between the two cylinders, and to
this end the said annular space may be divided into segments. In any case to ensure
good results the textile materials should not be packed too tightly, and the rotation of
the bobbin in the dye-vat should be slow, say one turn per minute to commence with
decreasing to one turn in two minutes at the end of a quarter of an hour. These
speeds give good results but I do not of course limit myself thereto. By the effect
of this slow rotation, the dye which impregnates the textile materials drains naturally
out of them as in dyeing in the hank. The depth of the immersion in the vat should
be such that the inner cylinder is a few centimeters below the level of the liquid.

page_text: 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 :-
The herein described process of dyeing vegetable and animal textile materials
before spinning, at any stage of their preparation, by winding them upon a cylinder
or otherwise placing them between two concentric open-work cylinders rotating over,
and partially immersed in, a dye-vat, substantially as specified.