Back to results
US 4,799,414 AGranted
Rotary cutter apparatus
AssigneeScheffer, Inc.
InventorsBruce A. Scheffer, Eric K. Lo
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeScheffer, Inc.
InventorsBruce A. Scheffer, Eric K. Lo
Estimating the term…
A variable rotary cutter assembly for transverse cutting of web material as it passes through a nip between rotating anvil and knife cylinders includes one or more cutter assemblies selectively positionable on the periphery of the knife cylinder. Each cutter assembly includes a base block adapted to be releasibly mounted on the knife cylinder, and a pair of pivotally connected block members one of which is adapted for releasibly mounting on an associated base block and the other of which carries an elongated knife blade and is outwardly pivotable about a pivot axis parallel to and spaced from the knife blade. Spring means bias the knife carrier block member outwardly about its pivot axis so as to effect a predetermined cutting pressure per unit length of the knife blade against the anvil while enabling self-adjusting movement of the knife blade to accommodate substantial variance in anvil and knife cylinder spacing and knife blade wear. The cutters assemblies may be mounted to effect single or double transverse web cuts, and stripper means are provided to strip trim strips cut from the web by pairs of knife blades.
A cutter assembly for use in a rotary web cutter apparatus or the like having rotatable anvil and knife cylinders defining a nip therebetween through which web material passes during generally transverse cutting thereof, said cutter assembly comprising a first block member adapted to be mounted on the periphery of a knife cylinder for rotation through the nip between the knife cylinder and an anvil cylinder, a second block member supporting an elongated knife blade thereon and being mounted on said first block member for pivotal movement about a pivot axis parallel to and spaced from said knife blade, and means cooperative with said first and second block members to bias said second block member about said pivot axis away from said first block member but enabling pivotal movement of said second block member toward said first block member when said cutter assembly is mounted on a knife cylinder and said knife blade engages an associated anvil cylinder during a web cutting operation.
A variable rotary cutter assembly for use in cutting a web material or the like comprising, in combination,
Dependencies are inferred from the claim text.