Norfield Corporation

Other

Rosemary Rourke

A method of bonding a sheet of hard to bond thermoformable material to a core made of expanded thermoformable material is disclosed. The sheet of thermoformable material is heated to its glass transition temperature and then pressed into voids in the core forming a mechanical bond in addition to the chemical bond.

Laminates structure of an expanded core panel and a flat sheet of

A process for producing a clear surface on expanded thermoformable material is disclosed. A film layer of non bondable plastic material is disposed adjacent the clear plastic material to be expanded. After the expansion process the film layer is removed leaving a clear smooth surface.

Process for expanding thermoformable materials having clear surfaces and

A vented platen capable of being heated or cooled is disclosed wherein a plurality of heat exchange channels bored through the width of a plate member are arranged in a plane. The plate member has a plurality of openings on a surface that are vented by vent passages disposed on a plane substantially parallel to the plane of the heat exchange channels.

Growing community of inventors

Newtown, CT, United States of America

Rosemary Rourke