US 4,841,619 AGranted

Dewiring tool

OwnerMario Theriaultinventor

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Abstract

A tool to dewire a bale of dry pulp, waste paper or the like. The tool grabs the wire, cuts it and retains the cut wire. The same sequence of operation is repeated for other wires. The tool then coils the cut wires and discharges the coils as waste. The tool comprises a support casing in which is rotatably mounted a vertical cylindrical tube. This tube includes at its bottom end a pair of opposite slots having a lower portion spiralling for about a quarter of a turn, and an upper portion which extends longitudinally of the tube. A grabber arm, operated by a hydraulic cylinders, is mounted within the tube for up-and-down movement. Wire bending elements and a cutter blade are also mounted within the tube. In operation the tool tube is positioned over a selected wire and applied on the bale. The tube is rotated about one-quarter of a turn to pick up the wire in its spiral slots and raise the wire off the bale. The grabber arm then hooks the wire and pulls the same up. The wire is bent, is cut and its bent end is retained in the tube. Several wires can be cut and retained in the same manner. The tube is then rotated several turns, to be used as a mandrel in association with a coil-forming shoe, so as to wind the wires into compact coil. Then the shoe extracts the coil from the tube for discharge into a bin.

Claims14

Dependent claims

A tool for cutting and removing bale strapping wires comprising:

a casing, an open-ended tube rotatably mounted in said casing, first power means carried by said casing to rotate said tube in either direction;
said tube having an outer end portion protruding from said casing and terminated by a free end edge, said outer end portion having a pair of diametrically-opposed slits, each formed of an outer portion with a slit opening at said end edge and inwardly spiralling through a fraction of a turn and of an inner portion having a junction with said outer portion and extending generally parallel to the tube longitudinal axis;
said tube free edge adapted to be pressed against a bale surface with an overlying wire engaging the slit openings;
rotation of said tube by said first power means in one direction causing said wire to engage said outer spiral slits and to become spaced from said bale surface until said wire reaches the junction of said inner and outer slit portions to take a first position;
a grabber arm mounted in said tube for reciprocating movement longitudinally of said tube, second power means to reciprocate said grabber arm, the latter having a hook at its outer portion facing inwardly for hooking said wire in said first position, and cutting means in said tube for engaging and cutting said wire upon the latter being moved inwardly through said inner slit portions by inward movement of said grabber arm.

2 more elements

Dependencies are inferred from the claim text.