Method and apparatus for making a laundry detergent sheet
First Claim
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1. A method of making a laundry detergent sheet, said method comprising the steps of:
- preparing a first shelf-stable solution;
preparing a second non-shelf-stable solution comprising a portion of said first shelf-stable solution;
applying said second non-shelf-stable solution onto a heated surface; and
drying said second non-shelf-stable solution on said surface to form said laundry detergent sheet,wherein said applying step comprises moving at least a portion of said surface in a rising direction, and contacting said rising portion of said surface with said second non-shelf-stable solution to coat said surface with said second non-shelf-stable solution and allow excess second non-shelf-stable solution to drain off said rising portion of said surface in a direction opposite the rising direction.
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Abstract
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.
22 Citations
50 Claims
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1. A method of making a laundry detergent sheet, said method comprising the steps of:
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preparing a first shelf-stable solution; preparing a second non-shelf-stable solution comprising a portion of said first shelf-stable solution; applying said second non-shelf-stable solution onto a heated surface; and
drying said second non-shelf-stable solution on said surface to form said laundry detergent sheet,wherein said applying step comprises moving at least a portion of said surface in a rising direction, and contacting said rising portion of said surface with said second non-shelf-stable solution to coat said surface with said second non-shelf-stable solution and allow excess second non-shelf-stable solution to drain off said rising portion of said surface in a direction opposite the rising direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A method of making a laundry detergent sheet, said method comprising the steps of:
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preparing a first shelf-stable solution; preparing a second non-shelf-stable solution comprising a portion of said first shelf-stable solution; contacting a rising portion of a surface on one side of a heated cylinder, rotating in one direction about a horizontal axis, with said second non-shelf-stable solution to coat said surface with said second non-shelf-stable solution and allow excess second non-shelf-stable solution to drain off said rising portion of said surface in a direction opposite the one direction; drying said second non-shelf-stable solution on said surface of said heated cylinder to form said laundry detergent sheet; and removing said laundry detergent sheet from said surface of said heated cylinder. - View Dependent Claims (44, 45, 46, 47, 48, 49, 50)
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Specification