Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1987-07-27
1989-05-30
Pal, Asok
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
1510403, 1510404, 134 28, 134 40, B08B 308
Patent
active
048348031
ABSTRACT:
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.
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