Stock material or miscellaneous articles – Structurally defined web or sheet – Including stitching and discrete fastener – coating or bond
Patent
1986-09-12
1991-08-06
Corbin, David H.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including stitching and discrete fastener, coating or bond
47 59, 119 3, 210170, 405258, 428137, B32B 106, E02D 1720
Patent
active
050376888
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to materials useful as slope face protective materials for use in civil engineering work or the like, as water contact materials or filter materials for forming biological films for use in biological water treatment by an aeration or nonaeration process, and as materials for underwater nurseries for growing laver or like vegetables, artificial fish-breeding shelters, hydroponic culture beds, etc., the invention further relating to methods of preparing these materials and to a method of protecting the surface of slopes and a method of constructing slope face protective frames with use of such materials.
The slope protectors herefore used for protecting the surface of slopes include the following. which are laid over the slope as interconnnected. Unexamined Japanese Patent Publication SHO 55-36557). of square meshes (see Unexamined Japanese Patent Publication SHO 56-16730).
However, these protectors have drawbacks. They are made of heavy steel plates or shaped members thereof, are bulky even before use, are inconvenient to store and transport and require much labor for assembling. Moreover, the components, i.e heavy steel plates or shaped members thereof, are also inconvenient to store and transport.
Further the conventional materials for, and methods of constructing, slope face protective frames include the following. into a protective frame on the slope (Unexamined Japanese Patent Publication SHO 55-59224). assembled on the slope, with the frames interconnected by reinforcement rods and anchored in place when so required, followed by placement of mortar or concrete by spraying method. cardboard on the slope, interconnecting the frames by reinforcement rods and placing mortar or concrete by spraying (see Examined Japanese Patent Publication SHO 57-8248).
The precast frame method (a) requires much labor for transporting and assembling the concrete members which are heavy. With the methods (b) and (c), the frames can be arranged easily, but these methods have the drawback that the reinforcement rods must be set in place by an additional procedure which requires much labor.
Described below is the material to be brought into contact with water for forming biological films in biological water treatment by an aeration or non-aeration process. FIGS. 13 and 14 show an excellent contact material recently made available which is an arrangement of loops made of very thin vinylidene chloride thread and bundled together.
The string-like contact material has the following advantages. sewage contact efficiency. loops, which retain a large quantity of microorganisms thereon with strong adhesion without readily releasing them. sewage treating aeration tank as desired in accordance with the structure and input load of the tank.
Nevertheless, the string-like contact material has the drawback that as a progressively increasing amount of microorganisms adhere to the loops of thread, the surface of the loops become covered with a sticky substance, making the whole assembly resemble a rod as if by clogging to result in a greatly reduced area of contact.
Accordingly, a first object of the present invention is to provide a material which is lightweight, not bulky before use and therefore easy to handle, store and transport, and which is suitable for use as a slope face protective material and water-treating contact material, the material being also usable for underwater nurseries for growing laver or like vegetables, artificial fish-breeding shelters, hydroponic culture beds, etc.
A second object of the present invention is to provide a method of preparing the material with a high efficiency.
A third object of the present invention is to provide a simple and easy method of protecting the surface of slopes with use of the material.
A fourth object of the present invention is to provide a simple and easy method of constructing a slope face protective frame with use of the material.
These and other objects, features and benefits of the present invention will become apparent from a further description of t
REFERENCES:
patent: 3958751 (1976-05-01), Bruno
patent: 4002034 (1977-01-01), Muhring et al.
patent: 4105724 (1978-08-01), Talbot
patent: 4181450 (1980-01-01), Rasen et al.
patent: 4481242 (1984-11-01), Fletcher
patent: 4818579 (1989-04-01), Uchida
Corbin David H.
Earthnics Corporation
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