EP 0870583 A2 19981014 - Water jet edge trimming station for use in papermaking machine
Title (en)
Water jet edge trimming station for use in papermaking machine
Title (de)
Wasserstrahleinrichtung zum Besäumen der Längskanten zur Verwendung in einer Papiermaschine
Title (fr)
Dispositif à jet d'eau pour le rognage des reives longitudinales pour usage dans une machine de fabrication du papier
Publication
Application
Priority
CA 2201990 A 19970407
Abstract (en)
A water jet edge trimming station 12 for trimming the edges 54 of coated paper web 14 during on-machine operation including backsplash compensating features. The edge trimming station 12 has a cutting station 13 over which the web 14 travels to be cut. The water jet travels along a water jet axis 48 to a point of impingement 52 to cut the web 14. The cutting station 13 has an effluent receiving aperture at the point of impingement 84. A negative pressure mixing zone 90 located below the aperture draws effluent by-products or backsplash associated with cutting of the web 14 below the cutting surface 82. The water jet axis 48 is offset a first predetermined angle 62 chosen relative to a normal axis 61 passing at right angles through the point of impingement 84 to reduce backsplash. The water jet axis 48 is rotated about the normal 61 axis by a second predetermined angle 58 to direct the effluent by-products away from the water jet nozzle 33 and the traveling web 14. The water jet nozzle 33 has a positive air pressure chamber 64 surrounding the nozzle head 64 to maintain an air flow over the nozzle head 64 driving effluent backsplash away from the nozzle head 64. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
B26F 3/004 (2013.01); B26F 3/008 (2013.01); D21F 7/006 (2013.01)
Designated contracting state (EPC)
AT DE FI FR
DOCDB simple family (publication)
EP 0870583 A2 19981014; EP 0870583 A3 19990113; EP 0870583 B1 20020710; AT E220364 T1 20020715; CA 2201990 A1 19981007; CA 2201990 C 20051018; DE 69806428 D1 20020814; DE 69806428 T2 20030116
DOCDB simple family (application)
EP 98106594 A 19980407; AT 98106594 T 19980407; CA 2201990 A 19970407; DE 69806428 T 19980407