Back to results
US 4,286,016 AGranted
Pouch bleach
AssigneeThe Drackett Company
InventorsHarold L. Dimond, Raymond C. Odioso, Roger E. Reavill
Life of this patent
Estimating the term…
Abstract
A bleaching packet comprising a porous pouch containing a dry granular hypochlorite generating agent for the release of bleach in the aqueous medium of an automatic washing machine several minutes after the beginning of the wash cycle.
Claims20
A packet adapted for bleaching fabrics in an automatic washer consisting essentially of:
- A water-insoluble closed pouch containing from about 3 to about 15 grams of a substantially dry, water soluble granular hypochlorite generating bleaching agent having a particle size ranging from about 74 to about 2,380 microns;
- said pouch being of a substantially open pore material selected from the group consisting of foamed polyethylene, foamed polypropylene, foamed cellulose, foamed polyurethane of either the ether or ester type, and woven or unwoven cloth;
- and
- said open pore material having an average pore diameter of from about 130 to about 230 microns and a thickness of about 3/8 inch to about 1 inch;
- whereby the particle size of the granular hypochlorite generating bleaching agent is selected so that in cooperation with the porosity and the thickness of the pouch the leaching of said bleaching agent through the pouch will be delayed by from about 1 to 10 minutes from the initiation of the wash cycle.
2 more elements
A packet according to claims 12 or 20 wherein the amount of the bleaching agent will provide between 30 to 300 ppm available chlorine to the wash liquor, when all possible chlorine has been liberated.
Dependencies are inferred from the claim text.