Single Face Corrugated Cardboard Making Machine-Corrugator Machine
Single Face Corrugated Cardboard Making Machine–Corrugator Machine relates to a single facer corrugated cardboard machine comprising a machine mill roll stand, an upper and a lower fluted roller as well as a pressure roller cooperating with the lower fluted roller and pivotably supported on lever arms at the machine stand, adjustable abutments at the machine stand associated with the lever arms, and adjusting means supported at the machine stand and cooperating with the lever arms, said adjusting means pressing the lever arms against the abutment surfaces in order to adjust the pressure roller nip.
Such single face corrugated cardboard machines have been known for a long time. The lower fluted roller is fixedly supported with respect to its axis of rotation in the machine stand, while the upper fluted roller is pivotably supported at lever arms and is pressed against the lower fluted roller with the aid of a pneumatic or hydraulic arrangement. The pressure roller is likewise pivotally supported at lever arms. But the pressure roller cannot be readily pressed against the lower fluted roller because this would entail a so-called stumbling run owing to the running-off movement of the corrugation of the fluted roller on the cylindrical pressure roller. For this purpose, abutments are provided at the machine stand which delimit the movement of the pressure roller onto the lower fluted roller. The abutments are adjustable in order to adapt the width of the nip to the thickness of the paper. With the aid of a hydraulic or pneumatic contact pressure means the levers which are extended beyond the bearing point of the pressure roller are pressed in a direction towards the lower fluted roller Although a Fourdrinier pape making machine was built in the United States as early as 1827, paperboard itself was made by hand until George S. Shyrock installed the first cylinder machine in his plant near Chambersburg, Pennsylvania, in 1831. Shyrock was soon cranking out binders board and boxboard at the rate of one-fifth tons a day .Paperboard production was executed solely on cylinder machines, like the one below from 1886, until the Fourdrinier endless-belt process was adopted for its production in 1911.