Roll up shade doubled fabric having patterns thereon
US6189592A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Oct 18, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE06B2009/2458
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roll-up shade is doubled and its ends suspended from a head rail that is mounted above a window. One end is attached to a roller tube and the other end is attached to a stationary tube, with a bight being formed between the tubes. A first sheet is defined from the bight to the roller tube and a second sheet is defined from the bight to the stationary tube. A weighty rod is positioned in the bight to cause the bight to sag away from the head rail, and a shade guide surrounds the rod to guide the shade. With this structure, the roller tube can be rotated to pull up the first sheet and raise the bight or to lower the first sheet with bight, with the second sheet (i.e., the sheet that is directly attached to the stationary tube) remaining unmoving above the bight. The shade is patterned such that when the shade is raised and lowered, the relative motion between the two sheets causes the shade to alternatingly assume high and low opacity configurations. The roller tube can be motorized if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.