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US 8,568,859 B2Granted
Double-cell structure for window shade and manufacture method thereof
AssigneeTeh Yor Co., Ltd.
InventorsFu-Lai Yu, Chin-Tien Huang
Life of this patent
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Abstract
The present invention provides a double cell structure for window shade and its manufacture method for forming a substrate of double cell units. The substrate comprises first and second strip material bonded with each other, two lateral sides of the substrate being formed by first and second pleats. The substrate can then be cut to form multiple double cell units that are then stacked and bonded over one another for forming the double cell structure. In addition, the present invention also provides double cell structures for window shade.
Claims7
A double-cell structure for a window shade comprising:
- a plurality of double-cell units bonded with one another, each double-cell unit comprising:
- first strip of web material having a first pleat formed at the rear of the window shade and a second pleat formed at the front of the window shade, the first and second pleats defining a base and two side portions;
- and
- a second strip of web material having a first and second distal end, the first distal end bonded with the base of the first strip of web material, the second distal end and end portions of the two side portions of the first strip of web material bonded with an outer side of an adjacent first strip of web material at an adjacent double-cell unit.
1 more element
Dependencies are inferred from the claim text.