Patent ID: 8161621

Claim:
A method for fastening a plastic driver made of hot-deformable plastic, in a laundry drum of a washing or drying machine, wherein the driver has at least two domes on the inside, each dome having a cavity extending along its centre line and being oriented perpendicularly to a sheet casing of the laundry drum, the domes fastening the driver to the sheet casing, the method comprising: punching holes arranged in a hole pattern corresponding to the arrangement of the domes of the driver into the sheet casing of the washing drum; placing the driver with ends of its domes which project beyond the a contact surface of the driver with the sheet casing, onto the sheet casing so that the dome ends pass through the holes of the hole pattern; inserting counter holders into the cavities of the domes; driving hold-down elements against the sheet casing from a fastening side which is opposite to a side from which the counter holders are inserted; driving form punches from the fastening side against the dome ends which bring about heating of the dome ends until the dome ends have mushroom-shaped ends which are formed in a hot forming process and which, with their brims, externally rest against areas of the sheet casing that surrounds the holes; and returning the form punches, hold-down elements and counter holders to their pre-insertion and pre-driving positions.