초록 ▼

An insulating sheet material is made of a plurality of air tight chambers, each having a partial vacuum therein, held together in closely spaced side-by-side relationship so as to form a sheet of such compartments. The insulating sheet may be formed of sheets of material bonded together so as to for

An insulating sheet material is made of a plurality of air tight chambers, each having a partial vacuum therein, held together in closely spaced side-by-side relationship so as to form a sheet of such compartments. The insulating sheet may be formed of sheets of material bonded together so as to form the side-by-side compartments, or the compartments may be individually formed and secured in side-by-side relationship by a film of material to which the compartments are adhered. The insulation sheet is preferrably perforated between compartments so that the sheet can be easily torn to any desired size.

대표청구항 ▼

Transparent insulating material comprising two rigid sheets of transparent material, spacer means about the periphery of the sheets of rigid material to hold them in spaced relationship; and transparent air impervious flexible material sealed about the rigid sheets of transparent material and spacer

Transparent insulating material comprising two rigid sheets of transparent material, spacer means about the periphery of the sheets of rigid material to hold them in spaced relationship; and transparent air impervious flexible material sealed about the rigid sheets of transparent material and spacers to form an air tight chamber between the rigid sheets; and a partial vacuum within the chamber.