Improvements relating to the Opening and Cleaning of Sieve Bottoms in Dyeing, Impregnating, Washing, and similar Vats.
Year: 1897

page_text: Date of Application, 13th Nov., 1897-Accepted, 18th Dec., 1897
· COMPLETE SPECIFICATION.
Improvements relating to the Opening and Cleaning of Sieve Bottoms
in Dyeing, Impregnating, Washing, and similar Vats.
1, DR. HERMANN ILLGEN, Chemist, of Thiemestrasse, Crimmitschau, in the
Empire of Germany, 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 is intended to prevent the obstruction of the perforated bottoms
or sieves in dyeing vats or the like, and this purpose is attained by damming back
the circulated bath so as to cause recoils, by which the material lying on the sieve
is loosened.
In the annexed drawing there is shown a longitudinal section of the apparatus.
A valve D is inserted in the pipe which conveys away the bath from the vat A.
This valve D is correspondingly loaded with a spring or weight and is opened by
the mechanically circulated liquid.
When the pressure apparatus, by means of which the liquid is set in move-
ment, is reversed, there is for a short time an intermission of the pressure on the
liquid, and this permits the valve 1) to close and the liquid being still in motion
undergoes a back pressure, whereby the fibrous materials lying over the sieve
bottom of the vat are loosened and consequently the current when again renewed
can pass unhindered.
In order to effect this operation the machine is provided with a self acting
pressure device, which consists of two pressure chambers B provided with floats
and a cock C. The pressure chambers are filled alternately by the liquid and
when each chamber is filled the cock is displaced by the sunken float of the
chamber emptied in the meantime, so that the pressure gas passes into the filled
chamber and the liquid therein is forced through the vat.
The valve D forming the object of the present invention comes into action as
soon as the cock is displaced and a momentary stationary position is produced,
so that a recoil of the current takes place which causes the desired loosening of the
goods over the sieve bottom.
The vat with the circulating pipes and the pressure controlling apparatus for
moving the liquid are not the essential features of the invention, but the inven-
tion consists more particularly in the recoil operating valve D inserted in the
pipe which conveys the dye liquid.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
An improved device for opening and cleaning the sieve bottom in dyeing yats
and the like where the bath is put into circulation by pressure, the pipe beyond the
rat having a recoil valve D, which during the reversing or intermission of the

page_text: pressure device in consequence of its closure gives a recoil on the circulating
bath, by which recoil goods lying on the sieve bottom of the vat are loosened and
the sieve bottom is cleaned.
Dated 19th
1007
HERBERT HADDAN & Co.
Agents to Applicant,
18 Buckingham Street, Strand, W.C., London.