Housing windows in personal care product

Abstract

The present invention is directed to a personal care product including a treatment sheet having a lower surface, a housing including a floor surface and a plurality of columns, and a cavity formed by a volume extending from the lower surface to the floor surface. The volume extends from an inner column wall of the housing. The plurality of columns is formed in a side wall of the housing. The cavity has a height of at least one-fifteenth of a height of the personal care product and/or a height of at least about a height of one of the columns. The columns extend upward from the floor surface of the housing or to a lower ledge of a carrier of the housing. The floor surface is flat or shaped (e.g., a dome or a cone shape). Fluid flows within the cavity, into and out of windows between the columns.

Dependencies are inferred from the claim text.