US Patent 7366451 Developer conveyance screw
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Patent Inventor Names
Katsunori Yokoyama0
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Patent abstract
A developer feeding screw, which includes a shaft and a helical shape portion around said shaft, for feeding a developer in a direction of an axis of said shaft by rotation about the axis, said feeding screw, the improvement residing in that:a sectional configuration of said helical shape portion in a plane including the axis satisfies:Z(r)=kln(ro/r)where z(r) is a height of said sectional configuration at radius r with z(ro)=0 (ro is an outer radius of the helical configuration):r is a radius (0<r≦ro)k is a constant.
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US Patent 07366451 Developer conveyance screw US Patent 7366451 Developer conveyance screw
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Patent Number
073664510
Patent Number
73664510
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Patent Number
073664510
Date of Patent
April 29, 2008
0Patent Application Number
112756020
Date Filed
January 18, 2006
0Official Website
Patent Primary Examiner
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US Patent 07366451 Developer conveyance screw
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Is a
Patent jurisdiction
Patent number
07366451
Date of patent
April 29, 2008
Patent application number
11275602
Date Filed
January 18, 2006
Patent primary examiner
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