EP 1619298 A3 20060201 - Headbox of a machine for manufacturing a fibrous web, in particular a papier or board web
Title (en)
Headbox of a machine for manufacturing a fibrous web, in particular a papier or board web
Title (de)
Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Papier- oder Kartonbahn
Title (fr)
Caisse de tête d'une machine pour fabriquer une bande fibreuse, en particulier une bande de papier ou de carton
Publication
Application
Priority
DE 102004035303 A 20040721
Abstract (en)
[origin: EP1619298A2] The two turbulence channels (6.R) at the edges of the turbulence generator (5) are separate from the other turbulence-generating zones (10). They (6.R) are connected to outside supply lines (13), to set up edge flows (14). The supply lines (13) emerge from the start and end of the flow distribution unit (3). The profile of fiber orientation is controlled right across the running direction (L) of the web. To this end, the volumetric flowrate in the side lines (13) is adjusted by valve actuators (15, 16), hence varying the edge flows (14). The main central zone of the turbulence generators (5) is undivided by the arrangement. Each side valve is an actuated throttling valve (16). Between the distributor (22) and turbulence generator there is a pipe distribution grid (17) and a machine-wide intermediate chamber (18). Further variants based on the foregoing principles include: a dilution unit dosing sieve water for local control of consistency, and a mixing chamber arrangement.
IPC 8 full level
D21F 1/02 (2006.01); D21F 1/00 (2006.01); D21F 1/06 (2006.01)
CPC (source: EP)
D21F 1/02 (2013.01); D21F 1/022 (2013.01); D21F 1/024 (2013.01); D21F 1/06 (2013.01)
Citation (search report)
- [XDY] DE 3538466 C2 19980528 - VALMET PAPER MACHINERY INC [FI]
- [X] EP 0595325 A1 19940504 - MITSUBISHI HEAVY IND LTD [JP]
- [Y] US 5938896 A 19990817 - GRAF EDWIN X [US]
- [Y] DE 4239845 A1 19930519 - VOITH GMBH J M [DE]
- [A] DE 10230301 A1 20030403 - VOITH PAPER PATENT GMBH [DE]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1619298 A2 20060125; EP 1619298 A3 20060201; DE 102004035303 A1 20060216
DOCDB simple family (application)
EP 05105897 A 20050630; DE 102004035303 A 20040721