place and without compromising the seal when the casing is fastened to or removed from the dividing panel application_number US 36854403 A description the invention proposes a device for a window lifter for a vehicle generally the device comprises a drum a casing that houses the drum and a seal that holds the drum in the housing before the casing is fastened to a dividing panel the drum has an axis of rotation the seal has a portion that acts as a stop for the drum preventing the drum from translating along its axis of rotation 0025 fig1 illustrates a perspective view of the device before it is assembled the device comprises a drum casing 1 having a drum housing 2 a cable winding drum 3 to be inserted in the housing 2 and a seal 4 fastened to the casing 1 to hold the drum 3 in the housing 2 by placing the drum 3 in the housing 2 and then fastening the seal 4 to the casing 1 the drum 3 is held securely in the housing 2 the housing 2 forms a cavity that opens toward a drum insertion opening 14 in the seal 4 the drum 3 has two faces one on each side of the drum along the axis of rotation of the drum 3 one face of the drum projects toward the seal 4 while the other face of the drum is disposed toward the end of the casing the drum insertion opening 14 of the seal 4 has a diameter that is smaller than the diameter of the drum 3 so that the seal 4.