Spring system for roller blinds

E - Fixed Constructions – 06 – B

Patent

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Details

E06B 9/62 (2006.01) E06B 9/68 (2006.01)

Patent

CA 2751202

A roller blind including a roller of having a roller length and a roller outer diameter, a fabric attached to said roller for winding und unwinding from said roller. The fabric has a fabric length, a fabric weight, a fabric height, and fabric thickness. The blind includes a bottom bar having a bottom bar weight, and at least one spring operatively connected to the roller to driving-ly rotate the roller in at least one direction of rotation. The spring is selected according to a Protocol such that it's length ensures that it drives the roller with a constant operating force.

L'invention porte sur un store à rouleau, comprenant un rouleau ayant une longueur de rouleau et un diamètre externe de rouleau, et un tissu fixé audit rouleau pour l'enroulement et le déroulement à partir dudit rouleau. Le tissu a une longueur de tissu, un poids de tissu, une hauteur de tissu et une épaisseur de tissu. Le store comporte une barre inférieure ayant un poids de barre inférieure, et au moins un ressort relié de façon fonctionnelle au rouleau pour faire tourner par entraînement le rouleau dans au moins une direction de rotation. Le ressort est choisi selon un protocole tel que sa longueur garantit qu'il entraîne le rouleau avec une force d'actionnement constante.

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