Molding of paperboard containers
AssigneeJames River-Dixie/Northern, Inc.
InventorLeslie L. Martin, Jr.
Life of this patent
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Abstract
Heat resistant ovenable paperboard containers are formed from wet sheets consisting essentially of cellulose fibers and containing 50 to 100 weight percent water based on the dry weight of the fibers by hot pressing in a mold at 200.degree. to 400.degree. F. Heat resistant synthetic fibers may be incorporated in wood pulp to produce the wet sheet and impart improved burst strength to the finished product.
Claims12
A method of forming a molded article consisting essentially of wood cellulose papermaking fibers and up to 8 percent by weight of synthetic fibers capable of withstanding temperatures as high as 400.degree. F. without fusion, comprising forming a sheet of said fibers with a water content in the range of from about 50% to about 100% by weight based on the weight of the dry fibers;
- and disposing the formed sheet having said water content in a mold and pressing and drying said sheet at a pressure in a range from about 100 psi to about 1,000 psi while maintaining said mold at a temperature in a range of from about 200.degree. F. to about 400.degree. F.
Dependencies are inferred from the claim text.