EP 1009874 B1 20021106 - A VACUUM APPARATUS CAPABLE OF CONTROLLING THE RATE OF APPLICATION OF VACUUM PRESSURE IN A THROUGH AIR DRYING PAPERMAKING PROCESS
Title (en)
A VACUUM APPARATUS CAPABLE OF CONTROLLING THE RATE OF APPLICATION OF VACUUM PRESSURE IN A THROUGH AIR DRYING PAPERMAKING PROCESS
Title (de)
VAKUUMVORRICHTUNG ZUR STEUERUNG DER VAKUUMDRUCK IN EINEM PAPIERHERSTELLUNGSVERFAHREN MIT DURCHLUFTROCKNUNG
Title (fr)
APPAREIL A DEPRESSION DOTE D'UNE REGULATION DU RYTHME D'APPLICATION DE LA DEPRESSION DANS UN PROCESSUS DE FABRICATION DE PAPIER A SECHAGE PAR AIR
Publication
Application
Priority
- US 9715201 W 19970828
- US 70691596 A 19960903
- US 70691696 A 19960903
- US 70691796 A 19960903
- US 70691996 A 19960903
- US 70692096 A 19960903
Abstract (en)
[origin: WO9810140A1] A papermaking vacuum apparatus having a web-facing surface (114) adapted to support a papermaking belt (11) and comprising a head (110), a body (120) and at least one vacuum slot (116) disposed in the head and defining an aperture (118) on the web-facing surface. The vacuum slot is in fluid communication with the web-facing surface and extends from the web-facing surface to the body which is in further fluid communication with a vacuum source. The web-facing surface comprises a textured (115) area in the region of the web-facing surface juxtaposed with the aperture defined by the vacuum slot. This textured area creates a leakage of at least about 35 Marlatts at a pressure differential of 17,5 cm (7 inches) of Mercury. This leakage eliminates the vacuum seal between a smooth backside of the papermaking belt and the web-facing surface of the vacuum apparatus.
IPC 1-7
IPC 8 full level
D21F 1/48 (2006.01); D21F 1/52 (2006.01); D21F 2/00 (2006.01); D21F 11/00 (2006.01)
CPC (source: EP KR)
D21F 1/52 (2013.01 - EP); D21F 2/00 (2013.01 - EP KR); D21F 11/006 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9810140 A1 19980312; AT E227373 T1 20021115; AU 4240097 A 19980326; BR 9711670 A 19990824; CN 1237216 A 19991201; DE 69716968 D1 20021212; DE 69716968 T2 20030320; EP 1009874 A1 20000621; EP 1009874 B1 20021106; JP 2000501463 A 20000208; JP 3293139 B2 20020617; KR 20000068401 A 20001125
DOCDB simple family (application)
US 9715201 W 19970828; AT 97940678 T 19970828; AU 4240097 A 19970828; BR 9711670 A 19970828; CN 97199568 A 19970828; DE 69716968 T 19970828; EP 97940678 A 19970828; JP 51275398 A 19970828; KR 19997001722 A 19990302