Abstract: A method of continuous production of foamed material, wherein foam forming materials are fed from below at a controlled rate and the foamed material is drawn away from above at a corresponding rate. Foaming takes place in a diverging expansion enclosure bounded by moving sheet material in the form of webs or in tubular form constrained to follow a diverging path and drawn away from above so as to travel with the foaming material at a rate corresponding to its rate of travel. The enclosure is defined above by foam already expanded, at the sides by the sheet material, and below by a feed zone sealed to contain the foam forming materials. The enclosure leads into an upwardly directed take off path for the foam. Appropriate machines for practicing the method utilize either webs of sheet material or sheet material in tubular form, which tubular form may itself be made by the machine from webs.

Abstract: A method of continuous upwards production of foamed material by feeding foam forming materials from below and taking foamed material away from above, wherein foaming takes place in diverging expansion enclosure (1) the walls (13, 14) of which are provided with surfaces (15, 17) travelling with the foaming material, which enclosure (1) is defined above by foam already expanded, at the sides by said walls (13, 14) and below by a feed zone for the foam forming materials, and leads into an upwardly directed take off path for the foam.