Inventor
CHUPKA DAVID E
US30 patents
⚠️ This page may combine multiple inventors who share the name “CHUPKA DAVID E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BLACK CLAWSON CO
27 patentsUS4795560AJan 3, 1989
Screen plates
BLACK CLAWSON CO62 citations94
US5262003ANov 16, 1993
Method and system for defibering paper making materials
BLACK CLAWSON CO44 citations93
US5064537ANov 12, 1991
Seamless screen cylinder with laser cut openings
BLACK CLAWSON CO76 citations93
US4155841AMay 22, 1979
High turbulence screen
BLACK CLAWSON CO31 citations93
US5234172AAug 10, 1993
High pressure water jet comminuting
BLACK CLAWSON CO24 citations92
US4725007AFeb 16, 1988
Apparatus for pulping high consistency paper making stock
BLACK CLAWSON CO42 citations92
US4885090ADec 5, 1989
Screen plates
BLACK CLAWSON CO38 citations90
US4919797AApr 24, 1990
Screening apparatus for paper making stock
BLACK CLAWSON CO34 citations89
US4663030AMay 5, 1987
Disk rotor for selectifier screen
BLACK CLAWSON CO26 citations89
US4622132ANov 11, 1986
Liquid cyclone or centrifugal cleaner
BLACK CLAWSON CO25 citations82
US4410424AOct 18, 1983
Screening apparatus for paper making stock
BLACK CLAWSON CO24 citations82
US5582686ADec 10, 1996
High pressure water jet comminuting
BLACK CLAWSON CO17 citations81
US4356084AOct 26, 1982
Self-sealing valve assembly to facilitate unplugging of a centrifugal cleaner
BLACK CLAWSON CO23 citations81
US4081147AMar 28, 1978
Reversible disk refiner plates
BLACK CLAWSON CO29 citations78
US5382327AJan 17, 1995
Apparatus for thickening pulp and paper stock
BLACK CLAWSON CO14 citations74
US5186791AFeb 16, 1993
Apparatus for thickening pulp and paper stock
BLACK CLAWSON CO10 citations74
US4451358AMay 29, 1984
Noncircular rejects outlet for cyclone separator
BLACK CLAWSON CO10 citations74
US4383918AMay 17, 1983
High turbulence screen
BLACK CLAWSON CO17 citations74
US4328096AMay 4, 1982
Dual flow screening apparatus
BLACK CLAWSON CO16 citations74
US3970548AJul 20, 1976
Apparatus for screening paper fiber stock
BLACK CLAWSON CO14 citations74
US5078275AJan 7, 1992
Screening apparatus for paper making stock
BLACK CLAWSON CO8 citations72
US4901417AFeb 20, 1990
Method of finishing screen plates
BLACK CLAWSON CO14 citations71
US4171101AOct 16, 1979
Method of operating a disk refiner provided with reversible refining plates
BLACK CLAWSON CO17 citations69
US5021159AJun 4, 1991
Apparatus for thickening pulp and paper stock
BLACK CLAWSON CO9 citations68
US3947314AMar 30, 1976
Method of treating paper fibers in a stationary screen
BLACK CLAWSON CO15 citations67
US5591336AJan 7, 1997
Apparatus for dewatering and or washing papermaking stock
BLACK CLAWSON CO4 citations62
US5367894ANov 29, 1994
Apparatus and method for washing cellulosic pulp
BLACK CLAWSON CO6 citations61