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US 5,429,025 AGranted
Severing apparatus for sheet-laminating machines
AssigneeBillhoefer Maschinenfabrik GmbH
InventorsPeter Bartsch, Karl Hoch
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AssigneeBillhoefer Maschinenfabrik GmbH
InventorsPeter Bartsch, Karl Hoch
Estimating the term…
A severing apparatus for sheet-laminating machines for separating sheets, transported as single sheets and coated with a continuous film layer, with severing of the overhanging film layer in the edge region of the overlapping area by means of a moving knife, wherein on a rotary table taking hold of the sheet line from below, at least one and preferably several knives, distributed at equal intervals over the periphery, are pivotably mounted with an essentially radial cutting edge, which, by means of a cam control, on passing over the edge of the sheet line, can be lowered from a raised position into an operating position gliding on the sheet line and can be raised again running up from the sheet line, and wherein the circumferential speed of the knife section cutting into the film layer is appreciably greater than the conveying speed of the sheet line.
A severing apparatus for sheet-laminating machines for separating sheets transported as single sheets and a superimposed film layer with the film layer being severed at an edge region of an overlapping area, comprising a rotary table disposed at least partly in superimposed relationship with a sheet line in which the sheets including the film layer are conveyed, lifting wedges mounted on said rotary table, at least one knife means on said rotary table for severing said film layer, said lifting wedges being disposed ahead of said knife means considered in the direction of rotation of the table, pivot means pivotally mounting said knife means on said rotary table, cam means on said rotary table operably engageable with said pivot means to effect pivoting of said knife means between a raised position and a lowered operating position, and driving means for driving said rotary table at a rotary speed such that the circumferential speed of said knife means cutting into the film layer when said clasp knife means is in said lowered operating position is greater than the conveying speed of the sheet line.
Dependencies are inferred from the claim text.