Roller blinds are window shades that use a special mechanism at the top of the device to roll the solid shade up and out of the way when it is not needed. These blinds leave a clear and unobstructed view of the window very quickly and may be a more elegant choice than horizontal or vertical blinds. All roller blinds share a few basic components.
Fabric or Vinyl Sheet
Roller blinds are most commonly made from a single piece of fabric or vinyl material, according to Alternative Windows, unlike Roman shades, which require at least two panels of material. Seams or hems interfere with the smooth operation of the blinds as they are rolling up, so most roller blinds are either limited in size or made from custom materials to fit the width of your window. Thin vinyl blocks light well and hold up to constant exposure to sunlight. Many tightly woven fabrics work for roller blinds too and add patterns or colour choices not available with vinyl materials.
Spring Tension Tube
Cordless roller blinds use a special rolling tube that has a spring tension system inside. The experts at Blinds Chalet say that this tension device is used to roll the shade up when it is pulled down slightly, and it locks the blinds in any position when you want them partially opened. This spring tension tube eliminates the need for a nylon cord for adjusting the blinds. Dangling cords from blinds can be dangerous for young children, so cordless roller blinds are a safe option for nurseries and children's bedrooms.
Older and less expensive roller blinds generally use a cord to turn the rolling bar at the top of the blinds. This cord is caught or released by the same cord locking mechanism other blinds feature says YardandGardenRescue.com. When the cord is pulled, the mechanism releases it and you can raise or lower the blinds freely. Pulling down on the loose cord turns the bar and rolls the material up around it. While this system works well in most cases, you may prefer cordless roller blinds for aesthetic or safety purposes. Most cord that is used in blinds is made of nylon for durability.
The roller tube of a roller blind that uses a cord is similar to the spring tension tube of a cordless model but much simpler. With the cord controlling the position of the blinds, this tube simply provides a rod to hold the blinds up and a place for the material of the blinds to wrap around.
Weighted pieces of wood or metal are often installed in the bottom of roller blinds to keep them stretched taut when in use, according to Alternative Windows, which is especially important on blinds made of a lightweight fabric, which is easily moved by a breeze. Constant weight also keeps folds and wrinkles from developing in the material. A length of round wooden dowel or a thin metal bar is the most common component used for this purpose, and it is encased in a sleeve of material at the bottom of the blinds.
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