Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Special forms and forming
Patent
1986-06-25
1989-05-30
Coe, Philip R.
Bleaching and dyeing; fluid treatment and chemical modification
Fluid treatment
Special forms and forming
8158, 68200, 118692, 222 56, 239 71, 417 38, 417 45, D06B 508, D06B 108
Patent
active
048337480
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase application corresponding to PCT/AT85/00028 filed Aug. 29, 1985 and based in turn on Austrian national application A2805/84 filed Aug. 31, 1984.
FIELD OF THE INVENTION
The invention relates to a method for the application of foamed or non-foamed flowable materials to an article, whereby the substance under pressure is supplied to a coating device and is applied by the coating device to the article. The invention also relates to a device for carrying out the method.
BACKGROUND OF THE INVENTION
When applying a flowable substance to an article or substrate, it is required that, with identical substrate quality and identical substance quality, or in the case of coloring, with the same color concentration, the result of the application always be the same. This means that one always must be certain to apply exactly the same quantity of substance in the same manner (superficially or in-depth), from the first to the last produced meter of the substrate coated. It is also desirable to reach this goal at any production speed so that all textile finishing processes can be effected with variable speed but constant quality results. The printer, dyer, application operator, or finisher at the machine should not have to be the one to empirically adjust the production quality and be reponsible therefor. He should define and adjust the optimal speed from the technical point of view of the process and optimize the general process flow of all steps such as printing, steaming, washing, drying and the like. It is also to be considered that with today's production speed and working widths, which can reach 5 m and more, the operator of the machine is hardly capable of intervening quickly to control such a process, so that the danger of producing massive amounts of rejects is present.
OBJECT OF THE INVENTION
It is the object of the present invention to provide an improved coating method and device which obviate the above-mentioned problems.
SUMMARY OF THE INVENTION
The quantity applied to the substrate per surface unit depends on the substrate quality, the quality of the applied substance and the degree of coating, where patterns are used. The main requirements for an application device are the capacity to predetermine the quantity of substance to be applied, to maintaining reproducibility, and to ensure the uniformity of the applied substance over the width and length desired. The departure point is a closed-circuit system, wherein the substance to be applied is delivered under pressure by a pressure-producing device up to the area where the application starts, whereby a counterpressure builds up due to the sealing pressure at the exit opening, or whereby a counterpressure results solely due to the exit opening and the duct system, or the friction- and flow resistance of the friction system.
In accordance with the invention, it is now proposed that, in the case of a predetermined quantity of the substance unit of surface area, to control the flow rate of the substance dispenser to the applicator, depending on the speed, by means of a control element, and to ensure the quality of the application, by measuring the application pressure, at a plurality of measuring points, in any case.
The device for carrying out this process is characterized by the fact that at least one measuring point for the application pressure is provided between the outlet of the applicator and the substance dispenser, or in an overflow duct.
With the aid of the invention it has been possible to obtain predeterminable, and preselectable application results, under varying circumstances, particularly with speeds varying between zero and a maximum speed, and namely for all kind of substances and for all kind of application modes, superficial or in-depth, and also the width of application can be varied. The device according to the invention is at once a measuring, controlling the adjusting device and can be utilized for all flowable media, as well as for aqueous, fluid, visco
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patent: 3985467 (1976-10-01), Lefferson
patent: 3994220 (1976-11-01), Vertegaal
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patent: 4237818 (1980-12-01), Clifford et al.
patent: 4530463 (1985-07-01), Hiniker et al.
patent: 4614300 (1986-09-01), Falcoff
patent: 4668948 (1987-05-01), Merkel
Gaser Manfred
Zimmer Johannes
Coe Philip R.
Dubno Herbert
Zimmer Johannes
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