Spray nozzle device for cleaning accumulations in suction roll openings

Claim 2

The art as described in claim 2 which includes, observing the zone in which the jet impacts the roll, and moving said jet axially of the roll when there has been a substantial disappearance of fog in said zone.

Claim 3

In a machine for making a web of paperboard or the like having a rotatably mounted suction roll said suction roll being free of any felt wrapped wholly therearound, said suction roll including a cylindrical wall with suction openings therein which are circular in cross section having their axes radial with respect to the suction roll and in which materials accumulate so as to impair the operation of said machine, apparatus for cleaning the materials from the suction openings in said suction roll comprising, a nozzle having a circular jet opening therein of substantially smaller diameter than the diameter of said suction openings wherein the ratio of the diameter of each of said suction openings to the diameter of said jet opening is approximately 5.35 to 1 means for delivering water under pressure to said nozzle and through said jet opening to form a compact stream of water directed outwardly of said nozzle, and support means supporting said nozzle adjacent said roll to project said compact stream radially against the surface of said roll and into each respective independent and individual suction opening presented adjacent said nozzle during the rotation of said roll whereby each of said suction openings is independently subjected to the entire impact of said compact jet as the respective suction openings are presented adjacent said nozzle to remove accumulated material therein.

Claim 4

Apparatus as described in claim 4 wherein said suction openings are of a diameter of the order of 3/8 inch and said jet opening has a diameter of the order of 0.07 inch.

Claim 5

Apparatus as described in claim 4 wherein said support means comprises, a moveable nozzle head, and a fixed rack means slidably supporting said head for movement substantially parallel with the axis of said suction roll.

Claim 6

Apparatus as described in claim 6 which includes a plurality of said nozzles of substantially identical construction and operation and mounted in said nozzle head.

Claim 7

Apparatus as described in claim 6 wherein said rack comprises a cylindrical member having a slot therein in which said nozzle is positioned.

Claim 8

Apparatus as described in claim 8 which includes a rigid pipe connected to said nozzle head.

Claim 9

Apparatus as described in claim 9 which includes a flexible tube connected to said pipe.

Claim 10

Apparatus as described in claim 4 wherein said nozzle has a circular nozzle opening of a diameter of the order of 0.07 inch.

Claim 11

Apparatus as described in claim 4 wherein said nozzle is positioned in close proximity to the peripheral surface of said suction roll adjacent the zone where said peripheral surface moves away from the web.

Claim 12

Apparatus as described in claim 12 wherein said suction roll has a peripheral wall with a thickness which is greater than 1/2 inch and is solid except for said suction openings and wherein said nozzle is positioned not more than 1 1/4 inches from said peripheral wall.