Title:
FIELD POWDER AND SLIP PREVENTION CHALK
Document Type and Number:
Japanese Patent JP2004261213
Kind Code:
A
Abstract:
To provide powder safe and harmless to a human body and excellently used in drawing field lines or in preventing slippage.
A chicken egg shell E is washed with water, and dried in a hot-air dryer thereafter. The dried egg shell E is put into an agitating separation tank, where the egg shell is agitated with high-pressure water, and the egg membrane inside the egg shell E is separated and removed. After that, the egg shell E with the egg membrane separated and removed is dried in the hot-air dryer, and pulverized by a pulverizer into powder. The pulverized egg shell E is classified with a mesh screen, and the target egg shell powder P whose particle size is approximately 100 μm is obtained.
Inventors:
SHIMO HIROSHI
NISHIKAWA MIYUKI
NISHIKAWA MIYUKI
Application Number:
JP2003026868A
Publication Date:
September 24, 2004
Filing Date:
February 04, 2003
Export Citation:
Assignee:
SHIMO HIROSHI
NISHIKAWA MIYUKI
NISHIKAWA MIYUKI
International Classes:
A63B1/00; A63C19/06; (IPC1-7): A63C19/06; A63B1/00
Attorney, Agent or Firm:
Shoshiro Toshima
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