Patent US 6,793,447

Method and device to make holes for components of wings for doors or windows comprising a frame consisting of uprights (14) on which blinds (16) oscillating with respect to an axis are mounted. The method provides to calculate the number of blinds (16) which can be applied in the wing and the interaxis “p” of the assembly holes (17) by dividing the height of the wing gap by the height of said blinds (16), rounding up the result of the division to obtain a whole number, calculating the overlap value between each blind (16) relation to the number of blinds (16) to be applied and comparing the overlap value obtained from this calculation with a pre-defined minimum value. If the overlap value is more than the minimum value, the number of blinds (16) is maintained and the pitch “p” is calculated by dividing the height of the wing gap by said number of blinds (16); if the overlap value is less than the minimum value, the number of blinds is increased by one unit, the new overlap is calculated, compared with the pre-defined minimum value, and the pitch “p” is calculated according to the new number of blinds (16).