PLEATED WINDOW COVERING AND METHOD OF MANUFACTURING SAME

摘要

A pleated window covering (24) is comprised of a transparent polyester film having a plurality of substantially uniform, V-shaped pleats (40) extending transversally with respect to a longitudinal axis of the window covering. The window covering is collapsible along the longitudinal axis by compressing the pleats together and is expandable along the longitudinal axis by pulling the pleats apart. Relatively flat sheets of the polyester film are pleated by pre-heating the sheets to a temperature within a range of approximately 76 DEG C-106 DEG C. The material is then pleated and is maintained within a temperature range of approximately 66 DEG C-103 DEG C for approximately 6-15 minutes. After the pleats are formed, pressure in a range of approximately 0.33 lbs./in.<2>-0.70 lbs./in.<2> is applied to compress the pleats and hold them in the desired shape until the material has cooled sufficiently. The actual temperatures and pressures used in the manufacturing process will vary depending upon the thickness of the film material.