Appeal No. 1997-1291
Application 08/283,934
The subject matter on appeal is directed to a method of applying a debonder
(softener or lubricant) to a tissue surface.
Claim 1 is illustrative and reads as follows:
1. A method of applying a debonder to a tissue web comprising atomizing
an aqueous solution of the debonder, dispersing the atomized debonder solution with
steam to form a debonder/steam mixture, and spraying the atomized debonder/steam
mixture onto a surface of the tissue web.
The references relied upon by the examiner are:
Smith et al. (Smith) 4,994,144 Feb. 19, 1991
Ampulski et al. (Ampulski) 5,246,545 Sep. 21, 1993
Claims 1-10 stand rejected under 35 U.S.C. § 103 as being unpatentable
over Ampulski in view of Smith. We reverse.
Ampulski is directed to a method of applying papermaking additives to the
surface of tissue paper. The additive may be a polysiloxane debonder (column 17, lines 1-
10, and column 18, line 10 et seq.) . The method comprises atomizing a debonder solvent
mixture and applying the same to a heated roller. The heat roller evaporates some of the
solvent leaving a thin coating, haze or mist containing the additive which is then transferred
to the surface of a dried and creped tissue paper by
contacting the dry tissue web with the heated transfer surface. Contrary to appellants’
position, Ampulski indicates that when polysiloxane is applied to one surface of the tissue
paper, some of it will, generally, at least partially penetrate to the tissue paper interior
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