Suction press roll
AssigneeBeloit Corporation
InventorsAmbrose L. Gordon, Jr., Leroy H. Busker
Life of this patent
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Abstract
A press roll for a press couple for dewatering a web in a papermaking machine wherein the roll preferably is a roll shell with certain of the drilled holes extending radially fully through the shell and certain other holes blind drilled to extend only a partial way into the shell and in one form, the shell having a rubber cover and the blind drilled holes extending alternate different depths to avoid shear planes in the rubber cover.
Claims8
In a press couple for dewatering a traveling web in a papermaking machine, the combination comprising:
- first and second press means defining a press nip therebetween with said second means being a cylindrical press roll shell;
- water receiving means for passing through said nip in contact with the roll and carrying a traveling paper web through the nip;
- and
- means defining a plurality of holes in the roll surface accommodating travel of water from the web through the water receiving means,
- said holes including a first group extending axially fully through the shell and a second group of holes being more shallow than the first holes and having a closed inner end.
A structure for dewatering a web in a paper machine having a first and second press means defining a press nip, one of said press means comprising:
- a rotatable press roll shell having rotary support means and a cylindrical outer shell surface;
- and means defining a plurality of holes in the surface of the roll for receiving water expressed from a web adjacent the roll surface subject to pressure,
- a first group of said holes extending radially fully through the shell and a second group of said holes extending only a portion of the way through said shell.
Dependencies are inferred from the claim text.