Fishing – trapping – and vermin destroying – Vermin destroying – Fumigators
Reexamination Certificate
1999-07-30
2001-10-09
Poon, Peter M. (Department: 3643)
Fishing, trapping, and vermin destroying
Vermin destroying
Fumigators
C047S00101T
Reexamination Certificate
active
06298596
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a plant for the controlled diffusion of vaporizable active substances in agriculture and in defense against parasites, in particular, in applying the technique of sexual confusion and disorientation.
2. Description of the Background
Systems currently used for the diffusion of active substances which act in the vapor state are of two types. A first type of system projects active substances a mixed with water, either solubilized or microencapsulated, towards vegetation. A second type of system, which is used mainly with pheromones in the technique of sexual disorientation and confusion, exploits the capacity of certain materials to be partially permeable or to absorb the substances and release them with time. This is the principle on which dispensers operate in sexual confusion and disorientation.
The first system results in product losses by distribution and degradation, whereas the second system allows operation with low doses of active substance, but requires manual repositioning of the diffusers at least annually, any increase in the number of diffusion points and in the number of insects simultaneously controllable being achieved only by positioning new and different diffusers at a cost proportional to the number of diffusers applied. This system is also characterized by a certain rigidity in that the quantity of diffused active substance is not readily controllable on the basis of defence requirements, but is influenced by environmental parameters which cannot be modified, the active substance diffused being modifiable only by applying further dispensers.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a plant which allows moment-by-moment control of quantities of individual active compounds to be simultaneously diffused into the environment, with considerable advantages in terms of active substance economy. This diffusion is effected only when required, in a reliable and efficacious manner, and in a manner which is responsive to environmental situations requiring immediate variations in the quantity of active substance diffused and increases in the diffusion points without additional cost. It is also an object of the present invention, in the struggle against insects using sexual confusion and disorientation techniques, to simultaneously control several insects without cost increase due to additional diffusers, but considering only the active substance cost.
The above objects and others are provided by a plant for controlled diffusion of vaporizable active substances in cultivation and in defence against parasites in agriculture, characterised by consisting of a diffuser in the form of ribbon or filament of considerable length, joined at its ends to create an endless closed-circuit line positioned within the environment the subject of the diffusion along a predetermined path, said diffuser being slidable along the path and movable by traction mechanisms, and being charged with the active substances directly in the field by a charging apparatus positioned along the path of the diffuser and consisting of distributers able to transfer small quantities of the active substance to be vaporized onto small portions of defined segments of the movable ribbon or filament used as the diffuser, said segments being dedicated exclusively to the diffusion of a single substance and being locatable on the ribbon or filament by suitable sensors of optical or other signs printed on the on the ribbon or filament in other segments dedicated to this purpose, the movement of the diffuser relative to the distributer within the dedicated segment of the ribbon or filament being measurable by a similar method, the quantity of active substance deposited on the diffuser being adjustable roughly and occasionally by varying the mechanical structure of the distributer, and adjustable finely and continuously by regulating the time involved in distributing the active compound on the diffuser and the speed of advancement of the diffuser, there being controlled both the movement of the diffuser ribbon or filament, and the time of operation of the individual distributers in distributing active substance onto the diffuser, by a microprocessor on the basis of predefined time programs having as variables environmental parameters measured by suitable sensors connected to the microprocessor.
REFERENCES:
patent: 1005180 (1911-10-01), Ellis
patent: 3146546 (1964-09-01), Moore
patent: 4160335 (1979-07-01), Von Kohorn et al.
patent: 4797301 (1989-01-01), Ardley et al.
Examiner's Document A, 1990, internet.*
Examiner's Document B, 1990, intenet.
Gellner Jeffrey L.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Poon Peter M.
Sagro S.p.A.
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