EP 0000222 A1 19790110 - Method and apparatus for continuously forming an airlaid web.
Title (en)
Method and apparatus for continuously forming an airlaid web.
Title (de)
Verfahren und Vorrichtung zur kontinuierlichen Bildung von Faserbahnen, durch Niederschlag mit Luft.
Title (fr)
Procédé et appareil pour la formation continue d'une nappe de fibres, par dépÔt par l'air.
Publication
Application
Priority
US 81055977 A 19770627
Abstract (en)
A continuous in-line method for forming an airlaid fibrous fluff web adjacent the uppermost and lowermost surfaces of a substantially planar internal reinforcing ply having substantially the same width as said fibrous web, said ply being substantially impervious to the passage of fibers from one surface thereof to the other, in a continuous fiber deposition zone is disclosed. In a preferred embodiment, a unique tissue folding board is employed to permit continuous formation of an airfelt web having a wet strength tissue reinforcing member located approximately mid-way between its uppermost and lowermost surfaces. In the apparatus for forming the web, two adjacent vacuum chambers (26,27) are preferably employed in the continuous forming zone to compensate for the increased airflow restriction encountered when forming the uppermost fibrous web position over the reinforcing ply and the lowermost fibrous web portion. In a particularly preferred embodiment, the portion of the internal ply (20) relative to the uppermost and lowermost surfaces of the resultant pad may be adjusted by advancing or retarding the position of the folding board (1) within the fiber deposition zone (12).
IPC 1-7
IPC 8 full level
A61F 13/15 (2006.01); D01G 25/00 (2006.01); D04H 1/72 (2012.01)
CPC (source: EP US)
A61F 13/1565 (2013.01 - EP US); D04H 1/72 (2013.01 - EP US); A61F 13/534 (2013.01 - EP US); A61F 2013/15821 (2013.01 - EP US); A61F 2013/53445 (2013.01 - EP US); Y10T 156/1051 (2015.01 - EP US)
Citation (search report)
- [A] FR 2277920 A1 19760206 - INTISSEL SA [FR]
- [A] US 2543101 A 19510227 - FRANCIS JR CARLETON S
- [A] US 2624079 A 19530106 - DUVALL THURE C
Designated contracting state (EPC)
CH DE FR GB LU NL SE
DOCDB simple family (publication)
EP 0000222 A1 19790110; EP 0000222 B1 19810211; AT 365682 B 19820210; AT A466578 A 19810615; BE 868480 A 19781227; BR 7804070 A 19790116; CA 1095214 A 19810210; DE 2860461 D1 19810326; ES 471132 A1 19790901; ES 476107 A1 19791016; GB 1588210 A 19810415; GR 63111 B 19790905; IT 1156838 B 19870204; IT 7850025 A0 19780626; JP S5438982 A 19790324; MX 148662 A 19830526; US 4141772 A 19790227
DOCDB simple family (application)
EP 78200043 A 19780615; AT 466578 A 19780627; BE 188854 A 19780627; BR 7804070 A 19780627; CA 306234 A 19780626; DE 2860461 T 19780615; ES 471132 A 19780626; ES 476107 A 19781219; GB 2594578 A 19780531; GR 780156546 A 19780620; IT 5002578 A 19780626; JP 7732578 A 19780626; MX 17390578 A 19780623; US 81055977 A 19770627