Treatment device for textile webs

Textiles: fluid treating apparatus – Machines – Liquid flowing

Patent

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Details

68158, 68175, D06B 320

Patent

active

057689199

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to a treatment device for a continuously passing textile web.


BACKGROUND OF THE INVENTION

A treatment device of this kind is known from DE Patent 690 530. In the known embodiment, there is arranged resiliently above the level of the treatment liquid a plate on which an oscillator with a rotating eccentric is arranged and from which bearing plates, on which the drum is mounted in the treatment liquid, extend downward.
This embodiment is not usable in practice, since the oscillations produced by the oscillator on the resiliently retained plate are poorly defined, and it is impossible to prevent the drum from oscillating back and forth undesirably in the container.
Known from DE OS 21 39 651 is an embodiment in which the drum is mounted with its shaft on an eccentric, and is thereby caused to oscillate in a defined fashion. The eccentric shaft is, however, mounted on a bearing arrangement outside the fronts of the container and requires a passthrough through those fronts. Extensive experience with this device has shown that effective long-term sealing of this passthrough is difficult.


OBJECTS AND SUMMARY OF THE INVENTION

An object of the invention to develop a treatment device for a continuously passing textile web such that no sealing problems occur, and that such defined oscillation of the drum is guaranteed.
In the present invention, a set of columnar supports supports a container that receives a treatment liquid. Within the container is a cylindrical rotatable drum that lies partially in the liquid. The drum is connected to vertical bearing plates, which are driven by a plurality of oscillation generators so that these bearing plates, and hence the drum, execute an oscillatory motion perpendicular to the drum axis. This is accomplished via a driven eccentric located above the intended level of treatment liquid.
In this device the eccentric mount therefore no longer engages on the shaft of the drum, but rather on the bearing plate above the liquid level. Sealing of the eccentric shaft is thus no longer necessary, since it is not located in the liquid. The torque support helps prevent uncontrolled oscillations of the drum and the bearing plates, so that the bearing plates are guided overall in desmodromic fashion.
Precise guidance of the bearing plates is important, particularly given the efforts that are presently being made to use the minimum possible bath volume for treatment devices for textile webs. The container therefore conforms as closely as possible to the drum or to the spatial region circumscribed by it in its oscillating motion.
To this end, a displacer element is provided. The displacer element also makes it possible for the interior of the drum to be kept even more liquid-free, reducing the corresponding volume.
To allow the displacer element to be made as large as possible, it is advantageous to have the support rollers engage on the outer periphery of the drum.
In a further embodiment, at least three support rollers, mounted on the bearing plates with bearing journals joined immovably thereto, are provided, thus constituting, for example, a three-point mount for the drum.
The forces occurring during oscillations of the drum perpendicular to its axis are not inconsiderable, and impose substantial stress on the support rollers if only a few, for example three, are present.
Consideration may therefore also be given to arranging the support rollers on a roller chain which rolls on an outer circular support surface. This offers the possibility of using a plurality of support rollers and distributing the forces over a plurality of transfer points.
A roller chain of this kind can have the support rollers between plate link chains on either side. In a preferred embodiment, the outer rollers provide only bracing on the support surface, and the inner rollers provide only mounting of the drum.
In principle it is sufficient if the drum is arranged so as to rotate freely, and is entrained by the web as it moves forward. In particular cases, how

REFERENCES:
patent: 2963893 (1960-12-01), Kusters
patent: 4047404 (1977-09-01), Hayashi

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