초록 ▼

Expandable and collapsible window coverings are disclosed including a web of non-rigid material and a stiffener intermittently applied to the web to provide stiffened regions along the web separated by regions of the non-rigid material. In this manner, the regions of non-rigid material can act as hi

Expandable and collapsible window coverings are disclosed including a web of non-rigid material and a stiffener intermittently applied to the web to provide stiffened regions along the web separated by regions of the non-rigid material. In this manner, the regions of non-rigid material can act as hinges between the stiffened regions. Methods for forming these window coverings are also disclosed.

대표청구항 ▼

[ What is claimed is:] [1.]1. An expandable and collapsible window covering comprising a web of non-rigid material and stiffening means intermittently applied to said web providing a plurality of stiffened regions along said web separated by regions of said non-rigid material, said regions of non-ri

[ What is claimed is:] [1.]1. An expandable and collapsible window covering comprising a web of non-rigid material and stiffening means intermittently applied to said web providing a plurality of stiffened regions along said web separated by regions of said non-rigid material, said regions of non-rigid material comprising narrow intermittent regions separating said plurality of stiffened regions whereby upon the collapse of said window covering said regions of said non-rigid material act as hinges and said plurality of stiffened regions are separated solely by the width of said hinges so as to provide the appearance of pleats located at said hinges without the necessity to provide separate creases between said plurality of stiffened regions to permit said web to be expanded and collapsed.