[미국특허]
Controlled delivery agricultural capsule and method of making
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A01M-025/00
B65B-009/10
출원번호
US-0354442
(1982-03-03)
우선권정보
GB-0007005 (1981-03-05)
발명자
/ 주소
Drake Cyril F. (Harlow GB2)
출원인 / 주소
International Standard Electric Corporation (New York NY 02)
인용정보
피인용 횟수 :
16인용 특허 :
6
초록▼
A capsule for the controlled release of an active material, e.g. into soil, is described. The capsule comprises an insoluble tubular housing (11) containing a number of water soluble or biodegradable partition walls (13) defining one or more hermetically sealed compartments, (12) filled with the act
A capsule for the controlled release of an active material, e.g. into soil, is described. The capsule comprises an insoluble tubular housing (11) containing a number of water soluble or biodegradable partition walls (13) defining one or more hermetically sealed compartments, (12) filled with the active material (14), e.g. an insecticide. When the capsule is in contact with water or an aqueous medium the partition walls (13) slowly dissolve or degrade thus releasing the active material after a predetermined delay.
대표청구항▼
An agricultural capsule for the controlled release of an active material selected from the group consisting of an insecticide, a nematocide, a molluscide, a fungicide, a fertilizer, a pest attractant and mixtures thereof, said capsule comprising a water insoluble plastic tube, a plurality of spaced
An agricultural capsule for the controlled release of an active material selected from the group consisting of an insecticide, a nematocide, a molluscide, a fungicide, a fertilizer, a pest attractant and mixtures thereof, said capsule comprising a water insoluble plastic tube, a plurality of spaced water soluble glass cylindrical partition bodies positioned in said tube, said glass containing phosphorus pentoxide or boric oxide as its principal glass forming oxide, said glass partition bodies dividing the tube bore into a plurality of hermetically sealed compartments, each compartment containing said active material, at least one wall of each compartment being said glass partition, the outer wall of each compartment being said insoluble tubing, and wherein the dissolution rate of the glass bodies is such that, when the capsule is contacted with water or moisture, the glass bodies dissolve over a period to time to release the active material contained in the compartments. A method of making a capsule for the controlled release of an active material selected from the group consisting of an insecticide, a nematocide, a molluscide, a fungicide, a fertilizer, a pest attractant and mixtures thereof said method including extruding a water insoluble plastic tube, and simultaneously filling the tube bore with water soluble glass cylindrical partition bodies interposed with measured quantities of active material, said glass containing phosphorus pentoxide or boric oxide as its principal glass forming oxide, said glass partition bodies being of substantially the same diameter as the bore to provide a tube having a plurality of hermetically sealed compartments each of which contains the active material, and cutting said filled tube into portions each of which contains a plurality of said compartments.
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