PULPING APPARATUS FOR WASTE MATERIAL

A pulper or similar device for comminuting solid materials includes a vaned rotor having some of its vanes equipped with cutter bars arranged to move past complementary stationary cutter bars in shearing relation. The device is particularly designed to select and cut flexible materials by causing them to fold over the leading edge of each moving cutter and its associated vane, and each of these vanes is equipped on the surface opposite the cutter with one or more fins arranged to hold the folded over pieces of flexible material against centrifugal travel outwardly of the vane and thereby to retain such material in folded over position over the leading edge of the vane and its cutter until the moving cutter reaches the next stationary cutter where the folded over material is cut into two pieces.