Apparatus and method for producing two-sided patterned webs in registration
Assignee3M Innovative Properties Company
InventorsLarry D. Humlicek, Daniel H. Carlson, James N. Dobbs, John T. Strand, Gregory F. King, David W. Kuhns, John S. Huizinga, William V. Dower
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Abstract
An apparatus for casting a patterned surface on both sides of a web. The apparatus includes a first patterned roll; a second pattered roll; and a means for rotating the first and second patterned rolls such that their patterns are transferred to opposite sides of the web while it is in continuous motion. During this process, their patterns are maintained in continuous registration to within at least 100 microns, and preferably at least 20 microns.
Claims10
An apparatus for casting a patterned surface on both sides of a web, the apparatus comprising:
- a first patterned roll;
- a second patterned roil;
- means for rotating the first and second patterned rolls such that their patterns are transferred to opposite sides of the web while it is in continuous motion, and said patterns are maintained in continuous registration on said opposite sides of the web to within 50 microns.
Dependencies are inferred from the claim text.