Western Atlas Inc.

Hk Systems, Inc.

Walter L Steffens

John J Wilkins

Martin A Heit

Timothy A Koeninger

A slat sorter having a series of platens slidably mounted on an array of slats driven by an endless chain with each platen having a diverter pin for enabling it to be diverted between a straight-through track and at least one divert track. A switch having an elongated arm having a pivot end and a tip opposite and upstream the pivot end which is urged by a prime mover, that preferably is a limited angle torque electric motor, between a straight-through position directing a diverter pin to travel along the straight-through track and a divert position directing the diverter pin to travel along the divert track. The arm has a cutout which allows the arm to be urged from one position to the another position before the diverter pin is completely downstream and cleared of the arm. Operably associated with the arm is a brake for enabling the arm to be urged toward either the straight-through or divert position by an oncoming divert pin to prevent the divert pin from colliding head-on with the arm. Each slat is adjacent a wheel-like bearing on a track of the sorter with the bearing being attached to a boss extending outwardly from the slat. The boss is part of a bushing pressed into the end of the slat which accepts a ball detent pin that can be withdrawn from the bushing and boss to permit removal of the slat.

Slat sorter

A sortation conveyor includes elongated slats, of rectangular configuration, travelling in pairs along an endless path. The conveyor is characterized by unique diverters, and mounting assemblies therefor. The diverters are formed of a durable plastic, with an additive for lubricity. The additional lubricity allows the bearing surfaces of the diverter to slide laterally along the adjacent pair of slats, with reduced friction. A metal I-beam insert strengthens the web of the diverter, while reducing the thickness thereof; the reduced thickness allows the web of the diverter to pass easily between adjacent pairs of slats. The diverter pin has flat sides, in horizontal cross-section, for cooperation with pin guides and switches. Two urethane blocks fill the hollow shell at the upper end of the diverter, and the protruding edges of the blocks are angled to impart a downward force to a package striking same. The sides of the web are angled to lift, and sweep out, debris that may fall into the narrow gap defined between adjacent slats of each pair. The leading edge of the diverter is curved downwardly to prevent thin parcels, such as envelopes, from slipping thereunder. End caps are bolted into engagement with central apertures in each slat of a pair of slats, and the heads of the bolts are received in slots in a side carriage plate. The carriage plate is secured, in turn, to one of the endless drive chains that advances the sortation conveyor along its path of travel. The bolts enable the quick assembly, and disassembly, of the mounting assembly, so that the slats and diverters can be repaired and/or replaced, as needed, with simple manual tools.

Sortation conveyor

A slat sorter includes a plurality of platens each supported by two slats. The slats are driven by hollow pin chain and are fastened to the chain by a ball detent pin which passes through the hollow pin of the chain into the slat end. The head of each ball detent pin acts as a bearing surface against a wear strip which confines lateral motion of the slats. The divert switches in the sorter use a switch arm driven by a motor. The arm is configured to allow rapid switching and a brake on the motor prevents rotation of the motor in the event of power failure to prevent the arm from drifting into an intermediate, potential crash, position.

Growing community of inventors

Cincinnati, OH, United States of America

Walter L Steffens