Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Reciprocating
Patent
1982-04-15
1986-08-19
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Reciprocating
25112907, 2511291, 25112916, B05B 132, B05B 130, F16K 3108
Patent
active
046065024
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase application of Patent Cooperation Treaty Application PCT/AT 81/0021 filed 20 Aug. 1981 and claiming the priority of the Austrian National Application A 4269/80 filed 21 Aug. 1980.
FIELD OF THE INVENTION
The invention relates to a jet nozzle for applying dyes or the like in a pattern with a precise dosing of liquids, onto a substrate, especially onto a web of material, the nozzle having a needle closing the nozzle mouth and being guided by a diaphragm, and having a magnet system for moving the needle.
BACKGROUND OF THE INVENTION
Printing methods using stencils and impression print rollers for printing on webs of materials have been known for some time. Recently possibilities have also been proposed to provide webs of material with a printing pattern using controlled liquid jets without using a screen stencil. The jet nozzles delivering the controlled liquid jets must operate in a very exact way and must open and close very quickly.
SUMMARY OF THE INVENTION
In accordance with the invention a jet nozzle has a needle which passes the magnet system and is connected to a further diaphragm above the magnet system which further diaphragm closes an upper chamber containing dye, both chambers containing dye are communicating, and for guiding the needle within the space bounded by the diaphragms discs are provided. The jet nozzle of the invention ensures a better guiding of the needle, and it is not necessary to provide for a pressure equilization in the space between the two diaphragms by a spring or by pressurized air. Possible variations of pressure have no influence on the opening and closing movement of the needle. The two rubber diaphragms enclose an air cushion effecting an equilization on short pressure pulses. Thus values connected in parallel to a liquid supply do not influence each other.
BRIEF DESCRIPTION OF THE DRAWING
The sole FIGURE of the drawing shows a section of the jet nozzle according to the invention.
SPECIFIC DESCRIPTION
The jet nozzle has an external casing 1 closed by a cover 2 at one end. This cover 2 is fixed to the casing 1 by a threaded ring 3. Between the casing 1 and the cover 2 there is a seal 4. At its lower end the casing 1 is provided with a nozzle mouth piece 6 which is pressed against a plane bearing face 36 of the casing 1 by means of a fixing sleeve 5. It is advantageous if the lower end of the casing 1 has an external thread engaged by an internal thread of sleeve 5. In the interior of casing 1 there is a magnet system consisting of two portions. The lower portion consists of a housing 12 wherein a coil 11 is provided. At the center the coil 11 surrounds a permanent magnet 10. The upper portion of the magnet system has a housing 22, a coil 21 and a permanent magnet 20. The two housings 12, 22 are connected to each other by a separating ring 30. The height of this separating ring 30 gives the distance between the two portions of the magnet system. In the gap between the two portions there is an armature disc 31, which can consist of laminated dynamo sheet metal.
The magnet system is transversed by the needle consisting, in the present case, of three portions 7, 18 and 28. The portion 7 is connected to the portion 18 by way of a threaded insert 8, a spacer sleeve 17 being provided between the portions 7 and 18. The portions 18 and 28 of the needle are connected to each other by way of a threaded insert 32. The armature disc 31 is rigidly connected to the needle at the connection points of the portions 18 and 28.
On the housing 22 of the upper magnet system there rests a support ring 23 which if desired might also be fixed to the housing for instance by an adhesive. Rings 24, 25 are inserted into the support 23, at least one of which, i.e. the ring 25, has an external thread. A rubber or plastic diaphragm 26 is fixed between the threaded ring 25 and the ring 24 whereas a diaphragm disc 34 is clamped between the ring 24 and an extension 37 of the support 23. A similar structure is also prov
REFERENCES:
patent: 3606241 (1971-09-01), Bornholdt
patent: 4142684 (1979-03-01), Schweitzer
patent: 4203554 (1980-05-01), Zimmer et al.
Dubno Herbert
Johannes Zimmer Gesellschaft m.b.H.
Kashnikow Andres
Ross Karl F.
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