Abstract: A continuous operation press for the manufacture and treatment of a board web of prefabricated or raw material, wherein the board web is passed into an inlet region between the upper and lower stringers of upper and lower endless belts traveling at a predetermined velocity in the transport direction, wherein there is provided a smooth coating formed with grooves serving as a sliding surface located at least in the main press and calibration regions. The board web glides above the smooth coating with the aid of fluid lubricant, the lubricant being supplied to the smooth coating through supply openings and discharged therefrom through discharge openings. Each groove in the smooth coating is formed with an opening therein either as a supply or discharge opening, each groove having a lubricant supply opening being positioned adjacent a groove having a lubricant discharge opening. Means are provided for controlling the pressure in at least some of said grooves for generation of a counter-pressure.

Abstract: A continuous operation press for manufacturing and/or coating, veneering, etc., a single-layer or a multiple-layer board web made of a mat which includes wood chips, wood fibers, etc. The press includes a carrying run of an upper belt which continuously circulates at a preset constant speed and a carrying run of a lower belt, with both belts preferably being made of steel. A friction reducing arrangement such as a slide or friction reducing coating extends over an entire width of a press area and is disposed on an upper and lower abutment, with the entering belts sliding over the friction reducing coating. A pressurized liquid lubricant is supplied to the friction reducing coating. The friction reducing coating extends over at least a main press area as well as a calibration area in which upper and lower slide coating extend parallel to one another.

Abstract: A continuous operation press for manufacturing and/or coating, veneering, etc., a single layer or multiple layer board web made of wood chips, wood fibers, etc. The press includes a carrying or supporting run of a lower continuously-circulating steel belt and a carrying or supporting run of an upper continuously-circulating steel belt. The pressing of the board web takes place between the upper and lower runs. An underside of the lower circulating belt rests on an abutment or support which is provided with a friction reducing arrangement, with the entire friction reducing arrangement being surrounded by a sealing arrangement.

Abstract: A continuously operating double belt press is provided in which the belts are formed from a plurality of articulated plates, which are in turn surrounded by endless steel bands which are pressed by low-pressure rollers and the plates against the material being compressed. Downstream of the plate belts, within the interior space surrounded by the pressing bands, respective large high-pressure rollers are disposed in facing relationship to one another. In order to improve the distribution and transfer of forces in the high-pressure zone adjacent the high-pressure rollers, a high-pressure endless belt is provided which surrounds the respective high-pressure rollers and runs between the high-pressure rollers and the pressing band. In preferred embodiments, reversing rollers are provided for the high-pressure endless belt, which reversing rollers serve to additionally press the high-pressure endless belt against the pressing band at a position spaced from the high-pressure rollers.