| 摘要 |
A method and apparatus is provided for forming a window treatment article having opposed upper and lower sheets interconnected by transversely oriented, longitudinally spaced vanes comprising a pair of counter-rotating folding rollers oriented with respect to one another to form a nip therebetween, and a pusher bar assembly which is operative to successively advance a portion of the upper sheet into the nip between the folding rollers where it is folded and brought into contact with a lower sheet. The upper sheet is successively folded upon itself to form a number of transversely-extending, longitudinally-spaced vanes each having a fold line defining an inner end which is affixed to the lower sheet, and an opposite, outer end which is closed by adhesive attachment, an ultrasonic weld or other means of attachment, thus defining an essentially closed pocket having opposed sides within which a rectangular slat can be removably inserted to add overall rigidity to the finished article and to provide a decorative effect. |
