REAM OF PAPER HAVING HEAT SEALABLE WRAPPER
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United States of America Patent
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app pub date -
Oct 22, 2007
filing date -
Feb 6, 2003
priority date (Note) -
Abandoned
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Abstract
The wrapper for a ream of paper has an inner surface coated with polyethylene. When the wrapper is formed about a ream of paper, the inner layer overlaps and contacts the outer layer along a longitudinal seam. The polyethylene layer is used to create a seal with the application of heat. Areas of the inner surface in proximity to a heat source during the heat sealing process and where a seal will not be beneficial are covered with a heat shield, such as a varnish. In this way, damage to the paper is avoided. The varnish includes Styrenated Acrylic polymer, with Kaolin Clay and ink. The varnish is applied to the wrapper during the same manufacturing process as the polyethylene coating.
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