<p>The strip of paste material may be an adhesive. The paper or cardboard may be in contact with a large roller and the paste material is supplied through a slit immediately before a small diameter spreading roller (8) held in a bearing piece (7). (7) Has a thin extension flange (6) engaging mountings and holding a strip width limiting fitting (10) and a sealing body (15) with a sealing plate (11).</p>
