초록 ▼

A folding door for industrial use utilizes a curtain having a series of spaced-apart panel sections which are insulated, and one or more folding hinge sections spanning adjacent panel sections. The hinge sections are generally made of flexible sheet material thinner than the insulated panel sections

A folding door for industrial use utilizes a curtain having a series of spaced-apart panel sections which are insulated, and one or more folding hinge sections spanning adjacent panel sections. The hinge sections are generally made of flexible sheet material thinner than the insulated panel sections. Such a curtain is suspended from a doorway, and is opened and closed by folding and unfolding the curtain around the hinge sections. The folding door of the invention is particularly advantageous for use in large industrial refrigerators and freezers.

대표청구항 ▼

A fan-foldable, insulated curtain, comprising: a plurality of spaced-apart, elongated, insulated panel sections each comprising thermal insulation and a cover enclosing said insulation; and at least one hinge section spanning adjacent panel sections, said hinge section comprising a flexible sheet wh

A fan-foldable, insulated curtain, comprising: a plurality of spaced-apart, elongated, insulated panel sections each comprising thermal insulation and a cover enclosing said insulation; and at least one hinge section spanning adjacent panel sections, said hinge section comprising a flexible sheet which is thinner than said panel sections, is capable of being folded over itself, and has a width at least as large as the thickness of said thermal insulation, further comprising at least one pocket disposed on at least one of said panel sections, and a weight disposed inside of said pocket, wherein said weight comprises an elongated, flexible tube filled with soft matter.