Control of sheet opacity

Details Control of sheet opacity Control of sheet opacity

B - Operations, Transporting

65

H

341/31

B65H 43/00 (2006.01) D04H 1/54 (2006.01) G05D 25/02 (2006.01)

Patent

CA 2032050

method to control the opacity of sheet formed of nonwoven material involves providing a computer with a steam pressure measurement from each of two steam heated palmer bonders. One pressure sensor from the first bonder drum and one from the second bonder drum provide signals used to control steam pressure and thus temperature of each bonder drum s surface. A signal indicating temperature of the surface of each drum and a measurement of speed are also collected by the computer/controller. The fundamental control signal is provided to the computer from an opacity sensor device which is compared to an opacity aim and then steam pressure to the bonder drum is adjusted to minimize any error signal between opacity aim measured opacity.

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