Apparatus for making drainage element with a periphery of different materials
摘要
The drainage element is made with a periphery formed of a filter material that allows the passage of water and prevents the passage of soil and a second peripheral section of net material that allows the passage of water while the preventing the passage of the lightweight aggregate therein. The filter material is preferably made of spun bonded polyester and may be made of a biodegradable material such as starch.
申请公布号
US8061020(B2)
申请公布日期
2011.11.22
申请号
US20080315575
申请日期
2008.12.04
申请人
BUSSEY, JR. HARRY;BUSSEY, III BUDDY HARRY;ICC TECHNOLOGIES INC.