Stock material or miscellaneous articles – Structurally defined web or sheet – Nonplanar uniform thickness material
Patent
1996-01-11
1998-03-31
Loney, Donald
Stock material or miscellaneous articles
Structurally defined web or sheet
Nonplanar uniform thickness material
428152, 428176, 428188, 160 841, B32B 328, A47H 500
Patent
active
057336326
ABSTRACT:
A window covering comprises a series of spaced collapsible cells, each cell having a pair of opposed panels which are joined by permanently creased flexible material. One panel of each cell is secured to a first control cord and the opposite panel of each cell is secured to a second control cord. Relative longitudinal movement of the two control cords causes said opposed panels to move toward or away from each other to expand or collapse the cells. Each panel includes a stiffening portion which has a mechanical interlock formation which retains a bead on the associated control cord. In their collapsed condition, the cells are spaced from each other to allow light to pass from one side of the window covering to the other through the space between the cells. In the fully expanded condition of the cells, cooperating light obstructing formations on the exterior of the stiffening portions substantially abut and overlap to block direct passage of light between adjacent cells from one side of the window covering to the other.
REFERENCES:
patent: 4884612 (1989-12-01), Schnebly et al.
patent: 5193601 (1993-03-01), Corey et al.
Comfortex Corporation
Loney Donald
LandOfFree
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