Improvements in Centrifugal Leather-dyeing Machines:
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Centrifugal Leather-dyeing Machines:
I, JOSEF KRISTEN, of Brunn, in the Province of Moravia, Austrian Empire, Leather
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:-
My invention relates to that class of leather dyeing machines in which the hide is.
stretched over a horizontal revolving table and the dyeing liquid allowed to flow upon
the hide from above. The invention has for its object to so arrange the colour
supplying orifices relatively to the table as to obtain a uniform saturation of all
portions of the hide with colouring matter in a shorter time than has been the case.
heretofore; furthermore the invention has for its object to provide means for causing.
the wet hide to well adhere to the table and for quickly returning the superfluous.
dyeing liquid into the reservoir whence it is fed onto the hide.
According to my invention I attain these objects by arranging over a circular table,
the upper surface of which is formed of a glass plate, a radial perforated pipe supplying
the dyeing liquid and by connecting the tank, which surrounds the table, with the
suction pipe of a pump conveying the liquid into the reservoir communicating with
the said perforated pipe; a vessel having a perforated bottom is interposed between
the said tank and the pump for straining the liquid and retaining impurities.
To enable my invention to be fully understood I will describe how it can be carried
into practice by reference to the accompanying drawing, in which
Figure 1 is a sectional elevation, and
Figure 2 is a plan of a centrifugal leather dyeing machine constructed according to.
my invention.
A is a circular plate rigidly secured to a vertical shaft a to which motion is imparted
by a horizontal driving shaft through the medium of bevel wheel gearing and a friction
clutch. The circular plate A is onchased in a hoop a' forming a flange on the upper
surface of the plate, and within this flange is cemented a circular glass plate a². Owing
to the perfect smoothness of the surface of this glass plate, the wet hides adhere very
firmly thereto, without any interposed bubbles of air, and so the hides are kept in
their position by atmospheric pressure.
At a small distance above the table A a', a' is arranged, in a radial direction, a.
horizontal pipe 6 closed at its free end which is situated over the centre of the table,
the pipe being provided with perforations in the lower portion of its sides. From the
reservoir B the dyeing liquid flows into the pipe b, and as it issues through the perfor-
ations of the said pipe, it flows over every part of the revolving hide which is thereby
saturated with colouring matter in a very short time.
The superfluous liquid projected beyond the edge of the table by centrifugal force,
is received by the conical flanged tank C surrounding the table. The lowermost
portion of the said tank communicates by means of a pipe c with the suction pipe of a
pump D driven by an eccentric keyed on the main driving shaft. The delivery pipe
of the said pump conveys the liquid back into the reservoir B.
In order to prevent solid particles, such as small pieces of leather and the like, from
getting into the pump, a vessel B provided with a removeable finely perforated false
bottom e is interposed between the tank C and pump D. By means of the handle e
the perforated bottom e can be lifted for cleaning purposes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
(1) In a centrifugal leather dveing machine. the combination with a horizontal

page_text: table adapted to be rotated round its centre, of a horizontal pipe arranged at a
short distance above the said table in a radial direction the said pipe having its
lower side perforated and having dyeing liquid fed to it, substantially as described.
(2). In a centrifugal leather dyeing machine the combination with a horizontal
table, adapted to be rotated and having its upper surface covered with plate glass,
of a radial horizontal colour distributing pipe arranged at a short distance above
the table and having its lower side perforated substantially as described.
(3). In a centrifugal leather dyeing machine the combination with a horizontal
revolving table, of a radially arranged perforated colour distributing pipe, dyeing-
liquid reservoir communicating with the said pipe, a tank surrounding the said
table and a pump the suction pipe of which communicates with the said tank,
while its delivery pipe opens into the said reservoir, substantially as set forth.
(4). In a centrifugal leather dyeing machine, the combination with a horizontal
revolving table of a radially arranged perforated coloured distributing pipe, a
dyeing-liquid reservoir communicating with the said pipe, a tank surrounding the
said table, a pump adapted to convey the contents of the tank into the reservoir
and a vessel provided with a removeable perforated false bottom, the said vessel
being interposed between the tank and the suction orifice of the pump, substantially
as and for the purpose set forth.
(5). The improved centrifugal leather dyeing machine herein before described and
illustrated in the accompanying drawing.
Dated the 18th day of July 1890
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.