Screw pair and co-rotating intermeshing twin-screw extruder provided with screw pair

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United States of America Patent

PATENT NO 9498899
APP PUB NO 20150029812A1
SERIAL NO

14382247

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Abstract

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A screw pair includes first and second screws having an outer circumferential surface on which a groove is spirally formed, and transports a raw material in a first direction along each of axis centers. An inner surface of the groove of each of the screws includes a first surface, which faces in the first direction, and in which the outer circumferential surfaces of the screws are formed to coincide with each other without a gap therebetween in the state where the screws mesh with each other, and a second surface, which faces in a second direction opposite to the first direction, and which forms a gap between the outer circumferential surfaces of the screws in the state where the screws mesh with each other.

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Patent Owner(s)

Patent OwnerAddress
THE JAPAN STEEL WORKS LTDTOKYO

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Handa, Kiyoshi Hiroshima, JP 48 534
Kakizaki, Jun Hiroshima, JP 18 60
Shimizu, Yohei Hiroshima, JP 57 186

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