Inventor
CALLAND WILLIAM N
US5 patents
Patents
5 patentsUS5219590AJun 15, 1993
Triple channel wave screw
HPM CORP19 citations80
US4997358AMar 5, 1991
Apparatus for reconfiguring finishing rolls in a plastic sheet fabrication sheetline
HPM CORP17 citations77
US5375992ADec 27, 1994
Triple channel wave screw
HPM CORP14 citations71
US6132075AOct 17, 2000
Multichannel wave screw with a slush channel barrier section
HPM CORP15 citations69
US5397526AMar 14, 1995
Method for reconfiguring finishing rolls in a plastic sheet fabrication sheetline
HPM CORP7 citations68