Abstract: The present invention relates to a method and apparatus for producing heating elements in the form of tubes with a resistive heater therein, surrounded by refractory powder. A filling pipe is inserted into said tube, and powder is allowed to flow down said pipe. The pipe is moved upwardly, to allow powder to flow out, and then moved downwardly to rest on the powder. In a preferred form, the pipe is forced downwardly to further compact the powder, preferably by means of an impact with a hammer. Means may be provided to selectively grip the pipe to move it upwards, and the gripping means and the hammer can have a common drive mechanism. A valve may be provided to allow flow of powder into the pipe to be shut off when said tube is filled with powder.

Abstract: A seat part cover for a seat part of a seat has an upper portion to cover the top surface of the seat part, front and side portions extending downwardly from the upper portion to extend over the front and side surfaces of the seat part, and a band portion extending between the side portions for positioning around the rear surface of the seat part. The band portion is unattached to the upper portion to provide an opening between the band portion and the upper portion at the rear thereof. A flap portion extends from the front portion to extend beneath the seat part from the front to the rear, the flap portion being securable to the upper portion at the rear thereof.