Coating apparatus – Projection or spray type – Coating moving mass of solid particulate work
Patent
1985-06-04
1987-04-21
Beck, Shrive P.
Coating apparatus
Projection or spray type
Coating moving mass of solid particulate work
118 19, 239124, 239424, 239524, B05B 1302
Patent
active
046587543
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a National Phase application corresponding to PCT/AT84/00033 filed 5 Oct. 1984 and based in turn upon an Austrian application No. 3566/83 of 7 Oct. 1983 under the International Convention.
FIELD OF THE INVENTION
The invention relates to an apparatus for uniform dosage, dispersion and application of protective coatings with liquid formula, particularly seed-dressing means, on seeds under use of compressed air, with a mixing drum having a seed inlet and feeding duct for the protection substances.
BACKGROUND OF THE INVENTION
It is known to apply pulverized protective substances to seed grains, whereby the grains are mixed with the protective substances in a mixing drum. This known method of application (seed-dressing) with pulverized substances has the disadvantage that due to abrasion, up to 50% of the protective substances are wasted, before the seeds are put in the ground. Because of this, it is necessary to apply overdoses in order to maintain the quantities necessary for the protection of the seeds in the soil. The overdosing has unfavorable effects on one hand on the health of the people involved in the seed-dressing operation and, on the other hand, on the environment,
By using seed dressings with liquid formulas, a slight improvement as to the strain on the operating personnel is achieved, but the excessive strain on the environment still persists, since the quantities are not reduced in order to insure a safe functioning. As long as preparations based on mercury were used for dressing of the seed grains, it was not necessary to provide a precise distribution of the protective substances over the surfaces of the seed grains, since these preparations produced a vapor stage, during which the seeds were permeated and the preparations could develop their full effectiveness.
Because of the replacement of the preparations based on mercury by other means which do not develop a vapor stage it became necessary to apply the seed dressing evenly, all around the surface of the seed grain.
The application of seed dressings in an even manner all over the surface of the seed grains is also a prerequisite for the reduction of the used quantities to the lowest possible level.
The attempt to use the known types of spraying equipment for the application of liquid seed dressings on the seed grains have failed due to the consistency of such seed dressings. Seed dressings with liquid formulas consist basically of a viscous carrier substance, wherein the active substance for seed dressing is dispersed. The usual spraying equipment becomes easily clogged due to the nature of the carrier substance, which has to insure the adherence of the seed dressing to the grain surface so that the equipment can become inoperable. They are therefore not suited for the application of liquid seed dressings.
OBJECT OF THE INVENTION
It is the object of the present invention to ensure the readiness of an equipment with operational safety, wherein all the seed dressings with liquid formulas can be formed into a spray mist, in order to obtain an optimal all around distribution with the lowest consumption of dressing.
SUMMARY OF THE INVENTION
This object is attained with an apparatus which includes a pipe for liquids serving as a feeding duct for the protective substances, coming from a dosage pump and opening into a mixing drum. The pipe is connected with an expansion tank or expansion tube for secondary air suction and is provided with a compressed-air duct opening into the mixing drum, the outlet of the pipe for liquids being concentrically located in the outlet of the compressed-air duct and opposite to the outlet of the pipe for liquids a baffle plate being provided. Through the expansion tank or the expansion tube, due to the negative pressure at the end of the pipe for liquids, secondary air is continuously absorbed and mixed with the seed dressing; following the disconnection of the dosage pump, the secondary air takes care of the complete emptying of the pipe for liq
REFERENCES:
patent: 696057 (1902-03-01), Lanstrum
patent: 3084874 (1963-04-01), Jones et al.
patent: 3253944 (1966-05-01), Wurster
patent: 3687717 (1972-08-01), Philip
patent: 3903333 (1975-09-01), Shirley et al.
Harold Franz
Messner Erich
Beck Shrive P.
Dubno Herbert
Maschinenfabrik Heid Aktiengesellschaft
Ross Karl F.
LandOfFree
Equipment for the uniform dosage, dispersion and application of does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Equipment for the uniform dosage, dispersion and application of , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Equipment for the uniform dosage, dispersion and application of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-744441