Global Patent Index - EP 1009874 A1

EP 1009874 A1 2000-06-21 - 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 PAPIERHERSTELLUNGSUERFAHREN 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

EP 1009874 A1 (EN)

Application

EP 97940678 A

Priority

  • US 9715201 W
  • US 70691596 A
  • US 70691696 A
  • US 70691796 A
  • US 70691996 A
  • US 70692096 A

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 (main, further and additional classification)

D21F 2/00; D21F 1/48

IPC 8 full level (invention and additional information)

D21F 1/48 (2006.01); D21F 1/52 (2006.01); D21F 2/00 (2006.01); D21F 11/00 (2006.01)

CPC (invention and additional information)

D21F 1/52 (2013.01); D21F 2/00 (2013.01); D21F 11/006 (2013.01)

Citation (search report)

See references of WO 9810140A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

EPO simple patent family

WO 9810140 A1 19980312; AT 227373 T 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

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