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 Method of forming and bonding fluff pads

Details
Inventors: Craig, Grantland A.; Johnson, Gary E.;
Assignee: Paper Converting Machine Company (Green Bay, WI)
Primary Examiner: Ball; Michael W.
Assistant Examiner: Yoder; Michele K.
Attorney, Agent or Firm: Tilton, Fallon, Lungmus & Chestnut

A method of forming and bonding fluff pads for diapers and the like wherein both the steps of forming and bonding are performed on the same vacuum drum.

DETAILED DESCRIPTION In the illustration given and with reference to first to FIG.
1, the numeral 10 designates generally the pad forming drum which is seen to support a plurality of circumferentially spaced pockets 11 in the outer peripheral surface thereof.
Normally, the drum has a diameter of 8 to 10 feet.
In the illustration given, the drum, for simplicity, is illustrated only "one wide".
However, it will be appreciated that a number of pockets may be disposed in axially aligned relation.
The drum 10, along one side is equipped with a spider 12 to provide means for connecting a drive generally designated 13 and which rotates the drum (See FIG.
3).
Referring again to FIG.
1, a pulp blend of wood fiber and polyolefin is introduced as at 14 into a hammermill generally designated 15.
The hammermill 15 is rotated by means of a motor 16 through a drive generally designated 17.
The fiberized fluff blend designated by the arrow 18 is forced through ducts 19, 20 into plenums 21, 22 which extend partially circumferentially around the drum 10.
Heated air is introduced through plenums 23, 24 and the formed pads P are withdrawn from the drum under vacuum applied by the vacuum box 25 onto a conveyor 26.
Thereafter, the pads P are enveloped between webs of non-woven and polyethylene as at 27 and 28.
After the pads have been removed, the now-empty pockets 11 are cleaned by virtue of air being drawn radially outward as at 29 in the vacuum hood 30.
A pipe 31 is connected to a vacuum source (not shown).
Immediately thereafter a release powder is applied through a plenum 32 to the still-empty pockets 11.
It is believed that a specific example of the operation of the invention will be helpful in the understanding thereof.
EXAMPLE The web 14 (see the left hand portion of FIG.
1) in this example is a pulp blend consisting of 85% wood fiber and 15% olefin and is introduced in the amount of 2,400 pounds per hour.
A suitable pulp blend is available from Hercules, Inc.
under the designation PULPEX E-338.
Air at room temperature, viz



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