초록 ▼

Method and apparatus for applying liquid acid to a treatment surface according to the teachings of the present invention is disclosed utilizing an acid pack formed in a preferred aspect by stencil cutting a supply stock of a layered assemblage including flexible, acid impervious material, pressure s

Method and apparatus for applying liquid acid to a treatment surface according to the teachings of the present invention is disclosed utilizing an acid pack formed in a preferred aspect by stencil cutting a supply stock of a layered assemblage including flexible, acid impervious material, pressure sensitive adhesive, and an adhesive covering. Specifically, a first stencil cut is made extending through the assemblage and a second stencil cut is simultaneously made extending through the adhesive covering while leaving the flexible material in tact dividing the adhesive covering into a central portion and a perimeter portion. The central portion of the adhesive covering is removable exposing the adhesive on the flexible, acid impervious material to allow securement of acid absorbing material thereto while the perimeter portion of the adhesive covering is maintained in a covering relation with the perimeter edge of the sheet for providing support for the flexible, acid impervious material. A pocket for receipt of the liquid acid is created by tightly sealing the perimeter edge of the sheet of flexible, acid impervious material to the treatment surface. The acid absorbing material absorbs the liquid acid and carries and uniformly spreads the liquid acid.

대표청구항 ▼

Apparatus for applying liquid acid to a treatment surface comprising, in combination: a sheet of flexible material, with the sheet being impervious to breaking down by the liquid acid, with the sheet having a perimeter defining an area and at least a first surface; means for absorbing the liquid aci

Apparatus for applying liquid acid to a treatment surface comprising, in combination: a sheet of flexible material, with the sheet being impervious to breaking down by the liquid acid, with the sheet having a perimeter defining an area and at least a first surface; means for absorbing the liquid acid and for carrying and uniformly spreading the liquid acid, with the absorbing means being flexible, with the absorbing means having a perimeter defining an area, a first surface, and a second surface, with the perimeter and the area of the absorbing means being smaller than the perimeter and the area of the sheet; means for securing the first surface of the absorbing means to the first surface of the sheet with the perimeter of the pad being spaced from and not intersecting with the perimeter of the sheet to define a perimeter edge between the perimeter of the pad and the perimeter of the sheet; means located in the perimeter edge for removably securing the first surface of the sheet to the treatment surface with sufficient adherence to achieve a tight seal between the sheet and the treatment surface creating a pocket for receipt of the liquid acid to be suspended and concentrated within the pocket adjacent to the treatment surface, with the removably securing means being impervious to breaking down by the liquid acid.