US Patent 9464264 Method and apparatus for making a laundry detergent sheet

A method and apparatus for making a laundry detergent sheet. Preferably, the laundry detergent sheet is capable of dissolving in a laundry cycle of an automatic washing machine. The method comprises the steps of preparing a first shelf-stable solution, preparing a second non-shelf-stable solution comprising a portion of the first shelf-stable solution, applying the second non-shelf-stable solution onto a surface, and drying the second non-shelf-stable solution on the surface.