Apparatus for insulating against conductive, convective, and radiant heat transmission

An apparatus for insulating an area such as a window, door, or wall against conductive, convective, and radiant heat transmission comprising:

• A. at least three essentially non-transparent, imperforate shade sheets;
• B. retracting means for mounting said sheets for selective movement between a drawn position covering the area and a retracted position not covering the area;
• and
• C. spacer means mounted with at least one shade sheet of each pair of adjacent sheets for separating said adjacent sheets to provide a dead air space therebetween, said spacer means including at least one spacer device which comprises an elongated strip formed of sheet material attached at one edge to one of said shade sheets, the other edge not being attached to said sheet but curling back into the region of said attached edge to form a closed loop.

An apparatus for insulating an area such as a window, door, or wall against conductive, convective, and radiant heat transmission comprising:

• A. at least three essentially non-transparent, imperforate shade sheets;
• B. retracting means for mounting said sheets for selective movement between a drawn position covering the area and a retracted position not covering the area;
• and
• C. spacer means mounted with at least one shade sheet of each pair of adjacent sheets for separating said adjacent sheets to provide a dead air space therebetween, said spacer means including at least one spacer device which comprises an elongated strip formed of sheet material with a tear drop cross-sectional shape, one edge of said strip overlying the other and both edges being attached to one of said sheets.

An apparatus for insulating an area such as a window, door, or wall against conductive, convective, and radiant heat transmission comprising:

• A. at least three essentially non-transparent, imperforate shade sheets;
• B. retracting means for mounting said sheets for selective movement between a drawn position covering the area and a retracted position not covering the area;
• and
• C. spacer means mounted with at least one shade sheet of each pair of adjacent sheets for separating said adjacent sheets to provide a dead air space therebetween, said spacer means including at least one spacer device which comprises a loop formed of one of said sheets, to extend laterally thereacross, by folding said sheet back upon itself at a point intermediate its ends and attaching a portion of the folded, facing sheet surfaces together, whereby said loop rotates outwardly away from the plane of sheet when a tension force is applied intermediate the sheet ends and collapses against said sheet when the tension force is removed.

An apparatus for insulating an area such as a window, door, or wall against conductive, convective, and radiant heat transmission comprising:

• A. at least three essentially non-transparent, imperforate shade sheets, at least one of said sheets having at least one radiation reflective surface;
• B. retracting means for mounting said sheets for selective movement between a drawn position covering the area and a retracted position not covering the area;
• and
• C. spacer means mounted with at least one shade sheet of each pair of adjacent sheets for separating said adjacent sheets to provide a dead air space therebetween;
• said spacer means comprising a plurality of spacer devices formed of a resilient flexible material having a normally expanded configuration which is assumed when said sheets are in the drawn position, said devices being formed to collapse when said sheets are in the retracted position, each spacer device being staggered along the sheet length with respect to the closest spacer device on a different sheet in order to permit said plurality of sheets to collapse relatively uniformly when in the retracted position.