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US 5,239,903 AGranted
Device for severing and holding a torn web
AssigneeGrafotec Kotterer GmbH
InventorsAlfredo Rosas, Werner Kettl, Karl Veh
Life of this patent
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AssigneeGrafotec Kotterer GmbH
InventorsAlfredo Rosas, Werner Kettl, Karl Veh
Estimating the term…
In an apparatus for severing and holding a torn web for a web processing machine and more particularly for a web feed rotary printing press, comprising a knife beam having a stationary knife and arranged across the conveying plane of the web, and furthermore a strike beam having a hump adapted to come into functional engagement with the knife and which by means of an associated push-out means is able to be lifted and lowered, said means being adapted to be activated by a web tear detector, it is possible to have a design with simple and low-cost means so that the device is not only of universal application but furthermore ensures a high degree of operator safety, if the knife beam comprises two identical, bar-like knife carriers holding the knife between them, which adjacent to their side facing the strike beam are provided with symmetrically arranged holders for elastic bars flanking the knife, which bars project in relation to the cutting edge of the knife and are spaced apart by a distance at least equal to the width of the hump on the strike beam, such strike beam being formed symmetrically in relation to the plane of cutting and having two gripper surfaces which are associated with the elastic bars and flank the hump which is provided with a cutting groove, into which the knife may be introduced.
An apparatus for severing and holding a torn web for a web processing machine comprising a knife beam having a stationary knife arranged across a conveying plane of the web, a strike beam having a hump adapted to come into engagement with the knife, a pushout means interactive with said strike beam for lifting and lowering said strike beam, said pushout means being adapted to be activated by a web tear detector, wherein said knife beam comprises two identical bar-like knife carriers holding the knife between them, said knife carriers being provided with symmetrically arranged holders adjacent to a side of said knife carriers facing the strike beam, said holders receiving elastic bars in a position so as to flank the knife, said elastic bars project in relation to a cutting edge of the knife and are spaced apart by a distance at least equal to a width of the hump on the strike beam, said strike beam being formed symmetrically in relation to a plane of cutting and having gripper surfaces which are associated with the elastic bars and flank the hump, said hump being provided with a central cutting groove, and said knife receivable within said cutting groove.
Dependencies are inferred from the claim text.