Folding apparatus with improved web transport
AssigneeAlbert-Frankenthal AG
InventorSebastian Prum
Life of this patent
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Abstract
A folder comprising a knife cylinder adapted to be driven at a rate independent of the speed of the web being supplied, a mating cylinder adapted to cooperate with said knife cylinder in cutting a web into sections at a cutting nip and which is provided with grippers for the leading edges of the sections, and a belt conveyor belt trained around a part of the circumference of said mating cylinder following said nip. It is possible to ensure more accurate production and greater reliability if the folder is so designed that it includes at least one of the cylinders delimiting said cutting nip and having suction or blowing ports placed following the cutting means, such ports being adapted for causing a flow of air towards the cylinder having said grippers.
Claims8
A mechanism for an adjustable folding apparatus comprising:
- a knife cylinder;
- means for causing the knife cylinder to rotate at a speed independent of the supply of a web to be processed;
- a mating cylinder with which said knife cylinder is adapted to cooperate at a cutting nip for the production of cut sections from the web and which is provided with grippers to engage and hold leading edges of said cut sections;
- a conveyor belt trained about said mating cylinder on a peripheral part thereof extending from said cutting nip, at least one of said knife cylinders forming said cutting nip being provided with ports coming after cutting means on said one cylinder, said ports being adapted to produce a flow of air, said flow of air being directed towards said mating cylinder with said grippers, said ports including blowing ports which are at least present in said knife cylinder in a part of the periphery thereof arranged after said mating knives and directed towards said mating cylinder, said ports having means for connection with a compressed air supply;
- and
- a staionary deflecting means arranged in a widening gap following said cutting nip and ahead of said conveyor belt, said deflecting means including deflector lugs which have spaces between them such that the blowing ports are aligned with the spaces.
Dependencies are inferred from the claim text.