bottom rail by its shadow effect furthermore the ladder cords 3 3 u2032 are fixed to the bottom rail because the lowermost slat is fitted to the bottom rail i e a completely normal placement of a ladder with respect to a slat the distance between the next lowermost slat and the lowermost slat bottom rail hence becomes quite habitual if there is a large discrepancy between the lengths of the raising cords the clips may be slid lengthwise out of the bottom rail so that the hook like fingers 7 7 u2033 are liberated and the thickening 4 u2032 may be fitted correctly to the raising cord 4 the clips 7 may be clipped back in place in order that the hook like fingers 7 7 u2033 engage the inwards facing parts 6 u2032 6 u2033 on the bottom rail 6 there is furthermore a possibility of adjustment even after the installation by the use of the slider 10 in that the lifting force or the height may be finally adjusted by displacement of the slider 10 this requires that the means 11 are brought in engagement with the thickening 4 u2032 of the raising cord 4 the means 11 may be fork shaped or guide in a v shape towards a hole that pinches the raising cord 4 the established correct position of the slider 10 is maintained by the barbs 12 u2032 that are established in the slider.