Vibrating screen feeder process

A vibrating conveyor screening and feeding process for conveying materials including the steps of:

• providing a bed having an inlet end and an outlet end on which material is adapted to be conveyed in a direction;
• providing a plurality of drive springs, each one of said plurality of drive springs having a first end attached to said bed and a second end attached to a support, each one of said plurality of drive springs adapted to compress and extend along a line of stroke;
• providing a plurality of stabilizers attached to said bed, each one of said plurality of stabilizers being more rigid in a direction transverse to said line of stroke than in a direction of said line of stroke;
• providing a plurality of vibratory motors, including a first vibratory motor having a first rotatable eccentric weight adapted to rotate about a first axis, a second vibratory motor having a second rotatable eccentric weight adapted to rotate about a second axis, a third vibratory motor having a third rotatable eccentric weight adapted to rotate about a third axis, and a fourth vibratory motor having a fourth eccentric weight adapted to rotate about a fourth axis, said first and second axis being located substantially in a first plane and said third and fourth axis being located substantially in a second plane, said second plane being non-coplanar with said first plane said first and second axis being spaced from said third and fourth axis along the direction the material is conveyed, said first rotatable eccentric weight and said second rotatable eccentric weight and said third rotatable eccentric weight and said fourth eccentric rotatable weight being free-wheeling with respect to one another, said first vibratory motor and said second vibratory motor and said third vibratory motor and said fourth vibratory motor being adapted to operate at substantially the same operating speed and to provide an output force generally perpendicular to its axis of rotation, said first rotatable eccentric weight and said second rotatable eccentric weight and said third rotatable eccentric weight and said fourth eccentric rotatable weight are adapted to accumulatively synchronize with one another without being rotationally coupled to one another such that the combined resulting output force of a first pair of rotatable eccentric weights is parallel to said line of stroke and the combined resulting output force of a second pair of rotatable eccentric weights;
• operating said first vibratory motor and said second vibratory motor and said third vibratory motor and said fourth vibratory motor to rotate said first rotatable eccentric weight and said second rotatable eccentric weight and said third rotatable eccentric weight and said fourth eccentric rotatable weight such that said first rotatable eccentric weight and said second rotatable eccentric weight and said third rotatable eccentric weight and said fourth eccentric rotatable weight accumulatively synchronize and accumulatively add their output forces and their respective power outputs and thereby vibrate said bed along said line of stroke at a vibration frequency;
• and
• operating said first vibratory motor and said second vibratory motor and said third vibratory motor and said fourth vibratory motor at substantially the same selected operating speed which approaches being equal to, or is less than, the natural frequency of said plurality of drive springs which are vibrating said bed;
• and
• using a programmable motor control unit and providing a standard variable frequency combined with an adjustable timer creating a vibratory stroke of 50 Hz for 25 seconds and an automatic momentary pulsing of at least 60 hertz of from 3 to 5 seconds enabling a full zero to maximum output adjustment.