DE62995C - Method and device for clarifying vats by filtration - Google Patents

Description

.KAIbERLfCHES / L

PATENT OFFICE. ^ '

PATENT LETTERING

CLASS 8: Bleaching, dyeing, stuffing and finishing

Patented in the German Empire on June 26, 1891.

The invention relates to in the Dyeing to the formation of certain dyes the fiber used so-called vats, namely on those which suspended Contain particles, e.g. B. Indigöküpen.

Since, on the one hand, the dyeing can only be carried out in the clarified vat, On the other hand, however, the vat must be stirred after each use to avoid the To maintain the composition required for dyeing, it takes between two Coloring for a long time until the suspended particles have settled on the ground or until the vat is cleared.

During this time, the latter cannot and must be used for dyeing therefore, if uninterrupted operation is to be maintained, a larger number Vats are kept ready next to each other and used one after the other.

A shortening of the clearing time by simply doing something in the usual way Filtration is not necessary because the vat liquid is caused by intimate contact would oxidize with air and thereby become unsuitable for coloring, while with the now customary clarification by simple Only a thin layer of oxide can settle on the surface of the vat liquid which then forms the entire quantity of liquid against the further action of the air protects. '

The purpose of the invention is now to reduce the work breaks mentioned by that the clarification of the stirred vat takes place by filtration, but at the same time the danger the unimpeded access of air and the associated oxidation of the liquid avoided will. .- '■ -'

This is achieved by the following method in conjunction with that shown in FIG. 1 to 4 drawn devices for use.

After stirring, when using the device shown in FIGS. 1 and 2, a vessel α of smaller size is hung in the vat A, which contains the vat to be clarified, the side walls of which are made of flexible material such as waterproof material or the like so that the structure can be folded up and pulled apart in the longitudinal direction. The bottom b of the vessel, on the other hand, is designed as a filter, which is sufficiently stiffened and weighted down by a ring c attached to it. The weight of the latter is chosen so that when the vessel α is hung in the folded state in the vat A , the filler base in the vat to be clarified automatically sinks downwards by pulling the vessel λ apart. During this movement, filtration takes place from bottom to top, in such a way that every piece of clarified liquid, with the exception of the first particles forming the protective oxide layer, enters the remaining clarified liquid when it has passed the filter. that it is protected from oxidation by this itself. The clarified

Claims (2)

The vat collects in the vessel α and after a comparatively short time there is enough liquid available to be able to color, while at the same time further clarified liquid enters the filter vessel. In addition to the bottom, the side walls of the vessel α can also be designed in whole or in part as filters, and in this case there is also filtration from the outside inwards. ; ■: In order to keep the filter base b clean of adhering particles in order to accelerate the filtration, brushes d can be attached in the tub in the manner shown in the drawing or in some other suitable manner, which are attached to movable and rotatable rods e and with the aid , the same can be brought into contact with the base b at any position and moved over the same by rotating the rods. . Instead of using a special vessel, it is also possible, as shown in FIGS. 3 and 4, to filter by means of a flask k fitted into the vat container, the base area Ar _{1 of which} consists of filtering material. This piston is either by hand or with the aid of suitable devices, e.g. B. a rack and pinion gear hi, moved in the vat liquid from top to bottom. The clarified vat collects accordingly over the flask, and the filtration also takes place here in such a way that only the surface of the clarified liquid comes into contact with the air. The lower filter surface of the piston can in a similar manner as described above with Always clean with the help of brushes. When using the clarification process described above, the dyeing is carried out in the filter vessel a or, when using a flask, in the vat A itself; in both cases, however, the clarified vat can be placed in a special container and dyeing can be carried out in this container. Patknt claims: r. Method and device for clarifying vats by filtration in such a way that only the uppermost layer of the clarified liquid comes into contact with the air during filtration, characterized in that. that in the vat container A a collapsible rack α with a weighted filter base b is hung, which sinks downwards due to its own weight in the liquid and here, pulling the vessel α apart, a filtration from bottom to top and an accumulation of the clarified liquid inside the vessel causes α. 2. The arrangement that instead of the Einhiingegefäfses an adjoining the walls piston A 'is brought into the vat container, the base area Ar _{1 is} also designed as a filter and when the piston goes down in the same way, as in claim 1 / characterized a Filtration initiated from bottom to top. 1 sheet of drawings.