초록 ▼

Composite paperboard containers formed from a first substantially planar sheet of paperboard material having a content contacting surface and a back surface, a first embossed sheet of paperboard material having a plurality of raised portions adhered to the back surface of the first planar sheet and

Composite paperboard containers formed from a first substantially planar sheet of paperboard material having a content contacting surface and a back surface, a first embossed sheet of paperboard material having a plurality of raised portions adhered to the back surface of the first planar sheet and a second embossed sheet of paperboard material having a plurality of raised portions adhered to the first embossed sheet of paperboard material. Additional planar sheets or embossed sheets may be added as desired in order to achieve the desired flexural stiffness and thermal resistance. Such containers being in the form of cups, plates, bowls or trays and formed by providing the substantially planar sheet of paperboard material, forming the planar sheet of paperboard material into a container shell, providing a first embossed sheet of paperboard material having raised portions and adhering the raised portions of the first embossed sheet of paperboard material to the planar sheet of paperboard material, providing a second embossed sheet of paperboard material having raised portions and adhering the raised portions of the second embossed sheet of paperboard material to the first embossed sheet of paperboard material. Alternatively, the embossed sheets of paperboard material may be previously adhered to one another and subsequently adhered to the planar sheet of paperboard material.

대표청구항 ▼

[ What is claimed is:] [1.] A method of forming a composite paperboard container comprising the steps of:providing a substantially planar sheet of paperboard material;forming said planar sheet of paperboard material into a container configuration;providing a first embossed sheet of paperboard materi

[ What is claimed is:] [1.] A method of forming a composite paperboard container comprising the steps of:providing a substantially planar sheet of paperboard material;forming said planar sheet of paperboard material into a container configuration;providing a first embossed sheet of paperboard material having a plurality of raised portions;adhering said raised portions of said first embossed sheet of paperboard material to said container configuration formed by said planar sheet of paperboard material;providing a second embossed sheet of paperboard material having a plurality of raised portions; andadhering said raised portions of said second embossed sheet of paperboard material to said first embossed sheet of paperboard material to form a container shell.