Abstract: A method produces pressed products from fiber-containing raw materials such as wood, straw, peat or suchlike, which are also referred to as secondary raw materials. In order to produce well pressed products, fiber-containing raw materials are mixed with water, vapor and, if need be, further additives while heating the raw materials and additives, the mixture being held at high temperature for a lengthy period of time before pressing.

Abstract: The invention relates to a belt for a machine for the production of web material, especially paper or cardboard, including a carrying structure and a pattern of wear-resistant material on at least one side of the carrying structure. The invention further relates to a machine for the production of a fibrous web in which the inventive belt is utilized.

Abstract: A feeding system for feeding comminuted cellulose containing material and liquid to a continuously operating treatment vessel. The feeding system comprises a chute, operating at a first pressure, a high pressure feeder sluices the material to a second pressure, that is higher than the first pressure, for further conveyance to the treatment vessel. The high pressure feeder also receives a return liquid flow from the treatment vessel at the second pressure and recirculates a recirculation flow to the chute. The high pressure feeder is in fluid communications, regarding both the liquid and the material, with the recirculation flow when any of the pockets of the high pressure feeder is in a location which corresponds to an outlet for the recirculation flow.