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    • 8. 发明专利
    • PISCICULTURE POND FOR CULTURING ATTACHING ALGAE
    • JPH0391428A
    • 1991-04-17
    • JP22869489
    • 1989-09-04
    • KATO MASASHI
    • KATO MASASHI
    • A01K63/00A01G31/00
    • PURPOSE:To perform artificial mass-culture of fish living in natural limpid stream and having a taste for alga grown on the surface of pebbles on a river- bed such as sweetish or delicate loach by culturing alga under the condition same as the natural condition. CONSTITUTION:The pisciculture pond 1 has prolonged shape having an isolated longitudinal partition wall 2 at the center and is provided with a propeller-type water-flow generator 4 at a position between a water-flow reversing part 5 and a straight water channel 6 to effectively generate circulation water flow 3. A plurality of alga-attaching plastic pipes 15 having perforated mesh structure are collected in a state arranged around a rotary shaft and the obtained rotatable culture apparatus for adhesive alga is placed under the water-surface of the straight water channel 6 of the pisciculture pond 1. A proper number of fishes are put into the pond 1, a water flow 3 is generated by energizing the propeller water-flow generator 4 and, at the same time, the adhesive alga culture apparatus is slowly rotated under irradiation of light to effect the culture of the fish while attaching and culturing the algae on the inner and outer surfaces of the alga attaching pipes 15.
    • 9. 发明专利
    • PAPER FASTENER
    • JPH02153800A
    • 1990-06-13
    • JP30832288
    • 1988-12-06
    • KOIKE PACKAGING MATERIALSKATO MASASHI
    • KATO MASASHIKOIKE EIICHI
    • B42F13/12
    • PURPOSE:To obtain a strong fastener simple in construction and also corresponding to every type of thickness by a method wherein a plurality of protrusion parts are concentrically and continuously provided on a shaft part so as to be peripherally spaced a gap from each other at predetermined intervals axially, and projection parts having a cross section corresponding to groove parts formed by the protrusion parts are arranged axially on a nest hole corresponding to the peripheral gap of the shaft part. CONSTITUTION:In an inserting member 1, a head part 3 is provided, and on a shaft part 4 extending therefrom protrusion parts 5 having a rectangular cross section are continuously provided at predetermined intervals axially so as to concentrically and peripherally arranged in pair at a central angle of 90 deg.. On the contrary, in a nest member, at least one projection part 8 having a cross section of a shape corresponding to groove parts 7 formed by the protrusion parts 5 on the shaft part 4 is provided on a nest hole. The projection parts 8 are arranged peripherally at a central angle of 90 deg.. The projection part 8 may be of course, provided by two or more stages at approximately the same interval as that of the protrusion parts 5 of the shaft part.