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Glossary of Terms, E-L

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Edge Drives: Edge drive units are designed to reduce tension to acceptable levels in applications where long belts pass through a series of turns and straight runs often resulting in tension levels which exceed recommended limits.

Elevated Temperatures: Thermal expansion of the belt width may adversely affect sprocket engagement with the belt openings.

Elongated Spiral Edge: A retaining edge fabricated by adding elongated spirals to the turned-up connectors or rod reinforcements.

End Lock: Rod cap with locking lip inserted into the module along both edges of the belt to secure rod position.

Turn-up Guard Edge: A retaining edge formed by extending individual connectors or rod reinforcements, and turning them up at prescribed angles and spacings.

Extended Sidebar Chain: A retaining edge provided by special attachments on the chain.

EZ Transfer Finger Plate: Eliminates the need for transfer dead plates at terminal discharges as the tines of the plates fill the space between the raised legs pickets or modules.

Fabric: That part of a complete belt consisting of connected spirals.

Fatigue Resistant: Field experience shows that the most common cause of failure in Omniflex belts is fatigue. The fatigue failure in Omniflex belts is typically a break in the corner of the pickets between the third and fourth openings from the outside edge. This break is the result of progressive wear on the bar links transferring the cyclic load to the pickets.

Filled Edges: Short lengths of wire (any shape) affixed between connectors.

Filler Rod: A rod of any shape (usually round) inserted through a spiral or spirals to fill the mesh. These rods do not connect spirals or belt components.

Flat Bar: Any commercially available or manufacturable flat bar may be used as cross supports to connect chain. Occasionally, flat bar is inserted through mesh to act as a filIer bar, or assembled under the mesh with the mesh welded to the flat bar.

Flat Wire Belt: A flat wire belt is a continuous assembly of flat wire pickets connected by a straight round connector inserted through positioned holes.

Flights (Lifts, Cleats): Devices attached across the width of the belt at prescribed intervals to prevent the product from sliding on the inclines and declines. These may be fabricated from woven wire spirals and formed or unformed sheet metal.

Flip-up: Conditions due to high tension. The outside edge of the belt raises up off of the belt supports. The belt may get caught between the drum and inside belt support.

Flip-up Detection: Electrical or mechanical/electrical device(s) that detect a Reverse Christmas Tree or edge flip-up condition.

Guard Edge Plate: Plates assembled between links and mesh to prevent product from falling off belt. Guard edge plates are tack welded to links as needed to secure position.

Herringbone: Arrangement of support rails in which rails are arranged in a "V-shape" pattern. Tip of "v" points in direction of belt travel. This arrangement provides even distribution of wear across belt width, and aids to keep the belt centered in its path.

High Tension: Tension meeting or exceeding the capabilities of the belt. High tension can result from system layout, high coefficient of friction between belt and product (dirty system), or product loading.

Hold Downs: Members that limit the amount the belt edges can rise in a Christmas Tree or flip-up condition.

In-Run: The length of belt from the load point to point tanget to the cage of a spiral system or turn of a fixed turn conveyor. Also known as infeed.

Inside Radius: The distance from the rotational axis (center) of the drum to the driving surface of the drum.

Inside Turn Radius: Turn radius measured to the inside edge of the belt

Integral Guard Edge: Inside leg link raised to prevent product from falling off belt. Integral guard edge links offer improved cleanup and sanitation over guard edge plates.

Interlocking Plate: A retaining edge consisting of a series of formed plates which "interlock" with each other to form a guard edge.

Interlocking Looped Edge: A retaining edge formed extending ends of straight wire connectors or reinforcing wires into interlocking loop design at prescribed angle to belt.

Internal Pigtails: Secure the rod position within the overlay spirals. They are recommended for applications with a soft or wet product. Internal pigtails may be added to any Omni-Tough overlay at the time of fabrication. Minimum belt width for this feature is 12 inches (305 mm) nominal.

Interwoven Weave: A fabric consisting of two conventional weaves in which one is woven into the other and sometimes reinforced by straight rods through the hinging points of the spirals.

Knuckled Edge: An edge finish which is complete without welding. The edge is finished by bending back the ends of the spirals to form a loop, generally permitting each individual spiral to flex as a single link in the belt.

Knuckled and Welded Edge: An edge finish which is knuckled with ends of the wire forming the knuckle loop, and tack welded or brazed to the spiral to prevent opening of loops.

Ladder Edge: An edge finish formed by extending reinforcing wires or connectors beyond the spiral finish, and creating an edge in the appearance of ladder chain.

Ladder Edge, Welded: An edge finish similar to Ladder Edge with loops tack welded or brazed.

Lane Dividers: Detachable plates assembled into the belt's width to create product lanes. Spiral wire lane dividers can also be manufactured.

Lehr Mesh: A balanced weave wire mesh fabric consisting of alternating right and left hand flattened spirals fully seated into specifically formed crimped connector rods - commonly used in glass processing systems.

Limit Switches: Switches that are installed to sound an alarm or stop the system if the position of the take-up roll goes too high or too low. Limit switches can detect high tension and prevent some jam-ups.

Loop: One complete turn within a spiral.

Looped Edge (Wicket): A retaining edge formed by extending pairs of connectors or rod reinforcements, and turning them up at prescribed angles and spacing.