EP 0119345 A1 19840926 - Screening apparatus for paper making stock.
Title (en)
Screening apparatus for paper making stock.
Title (de)
Sortiervorrichtung für Papierfaserstoff.
Title (fr)
Epurateur d'une pâte fibreuse à papier.
Publication
Application
Priority
US 45986783 A 19830121
Abstract (en)
A cylindrical screening member (15) for use in screening apparatus for paper making stock is provided with screening perforations (18) of extremely small minimum diameter by first forming the perforations with whatever larger minimum diameter is practical for production by drilling the base material for the screening member, and then subjecting the perforated base shell to a coating operation in which it is covered with a smooth coating (44), of predetermined uniform thickness entirely covering its inner and outer surfaces and also forming a lining for the wall of each perforation which reduces its minimum dimension by an amount equal to twice the thickness of the coating.
IPC 1-7
IPC 8 full level
CPC (source: EP)
D21D 5/16 (2013.01)
Citation (search report)
- EP 0046687 A1 19820303 - BLACK CLAWSON CO [US]
- DE 3033217 A1 19810312 - MITSUBISHI HEAVY IND LTD
- US 4105543 A 19780808 - SEIFERT PETER
- US 4155841 A 19790522 - CHUPKA DAVID E [US], et al
- US 3849302 A 19741119 - SEIFERT P
- US 3581903 A 19710601 - HOLZ EMIL
- US 2835173 A 19580520 - MARTINDALE JAMES H
- US 2347716 A 19440502 - STAEGE STEPHEN A
- US 3617008 A 19711102 - LAMORT PIERRE
- US 2658840 A 19531110 - PERRY JOSEPH C
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0119345 A1 19840926; EP 0119345 B1 19870107; BR 8306273 A 19840918; DE 3368957 D1 19870212; ES 284538 U 19850601; ES 284538 Y 19860216; FI 840214 A0 19840119; FI 840214 A 19840722; JP S59137593 A 19840807
DOCDB simple family (application)
EP 83306207 A 19831013; BR 8306273 A 19831116; DE 3368957 T 19831013; ES 284538 U 19831123; FI 840214 A 19840119; JP 22049083 A 19831122