US 4,785,764 AGranted

Apparatus for receiving and storing useful organisms and process for the production thereof

AssigneeZucher Beuteltuchfabrik AG

InventorHans-Rudolf Muller

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Abstract

A casing in the form of cylindrical hollow body is terminated at one end by a base and is optionally provided with a hanger. The other end of the cylindrical hollow body is covered by a cover. The cover has a gauze arranged in a frame. The gauze meshes have a clearly defined cross-sectional surface. Useful organisms are placed in a protected manner in the hollow body and only those useful organisms having a desired size can pass through the gauze. The casing is treated by chemical or physical means so that it will remain intact and the organisms contained therein will be protected for a time period predetermined by such treatment. As the casing is made from non-toxic materials, its decomposition at the end of the intactness period does not adversely effect the environment.

Claims8

Dependent claims

An apparatus for receiving and storing useful organisms for control or destruction of harmful bacteria, other harmful organisms or harmful materials, comprising a hollow solid casing having an opening, said casing being adapted to receive and store said useful organisms, and a cover having at least one opening which has a dimensionally defined cross-sectional surface, said cover being mounted on the casing so as to close the opening in the casing;

the opening in the cover serving to permit exit from the interior of the casing of only those useful organisms smaller than said opening, the casing and cover being formed from a material which decomposes without substantial detriment to the environment and which is selected from the group consisting of polyamide, cellulose, polyethylene, polypropylene, and polyester, said material having been treated prior to use as casing and cover with ultraviolet or beta radiation or with an oxidizing agent for a sufficient period to adjust the period during which the cover and casing will remain intact during use to a desired time so that when subjected to weathering the treated material will remain intact for said desired time and will then break down into products substantially non-detrimental to the environment.

Dependencies are inferred from the claim text.