Cylindrical filter element is made by winding helically a plastics thread around a number of circularly disposed plastics rods. The pitch of the thread can be varied in order to vary slot size in the filter element. Threads are joined to rods by ultrasonic welding. The plastics material used for threads and rods is acrylonitrile-butadiene-styrene.
申请公布号
DE1807913(A1)
申请公布日期
1970.06.04
申请号
DE19681807913
申请日期
1968.11.08
申请人
UNIVERSAL OIL PRODUCTS COMPANY
发明人
NELSON COLBURN,EDWARD;EARL PAULSON,RUEBEN;JAMES JOHNSON,RICHARD