Patent ID: 7128970

Claim:
A two-stage transfer for application to the interior surface of a rotational mold to impart indicia to a polyethylene product molded in said rotational mold at a molding temperature and ejected from the rotational at a demolding temperature less than the molding temperature, said transfer consisting essentially of: a carrier sheet of a flexible material having an indicia area for reception of said indicia and having successive coats overlying said indicia area, said coats consisting essentially of: a. an indicia coat, in a preselected direct-image indicia array consisting essentially of a mixture of indicia material and hydrocarbon wax overlying said indicia area; b. a top coat of a pressure sensitive adhesive which is substantially non-adhesive at ambient temperature and adhesive at said demolding temperature substantially covering said indicia area and overlying said direct-image indicia array; and c. a backing coat of a pressure sensitive adhesive between said carrier sheet and indicia coat substantially covering said indicia area which backing coat bonds to the carrier sheet at ambient temperatures and releases from the carrier sheet at said demolding temperature; said indicia, bottom and top coats being stable and resistant to decomposition at said molding temperature, and having melting temperatures less than said molding temperature to transfer to and become permanently incorporated into the surface of said polyolefin product, leaving no significant amount of residue on said mold surface.