Patent ID: 9567791
Date: 2017-02-14
CPC Classifications: E05F,E05Y

Claim:
1. A method for operating a drive device of a window positioning device, the window positioning device being controlled by a control device to position a window pane of a vehicle to selectively cover a window opening, the drive device moving in an opening direction to open the window pane and moving in a closing direction to close the window pane, the method comprising: operating the drive device to displace the drive device in the opening direction and bring the drive device into a first reduced load position, the drive device being displaced to the first reduced load position when the drive device is in an initial position in which the window pane is in a closed end position and when the window positioning device is in a first preload state for preloading the window pane; starting from the drive device being in the first reduced load position, operating the drive device to displace the drive device in the closing direction and bring the drive device into a second reduced load position in which the window positioning device is in a second preload state; and maintaining the window positioning device in the second preload state at least temporarily, wherein the drive device is displaced to the first reduced load position by a first value of a drive parameter, the drive device is displaced to the second reduced load position by a second value of the drive parameter, the second value of the drive parameter is smaller than the first value of the drive parameter such that the drive device is displaced less in the closing direction than in the opening direction, the window opening is fully covered when the drive device is in the second reduced load position, and in the second preload state, the window positioning device is subjected to a smaller preload than in the first preload state.