Dryer conveyor belt tracking system
The present invention provides a conveyor belt tracking system for a dryer having a web of a mesh material having a protrusion extending along the length proximal one lateral edge and above a flat surface and a first generally cylindrical roller having a three-tiered slot for receiving the protrusion and two flanking shallow tracks for receiving base flanges.
1. A dryer comprising:
a housing defining a drying chamber;
a conveyor of an endless web of a mesh material inside the housing and having opposed lateral edges, a length, and a generally flat surface, a protrusion extending along the length proximal one lateral edge and above the flat surface, the protrusion having a central peak and flanking base flanges; and
a pair of generally cylindrical rollers within the housing and spaced from one another and the endless web mounted on the rollers for movement with the rollers, each of the rollers having a circumference, opposed lateral edges and a generally smooth surface, a three-tiered slot extends about the circumference spaced axially inwardly from a lateral edge and extends radially inwardly of the smooth surface and having a central deep track for receiving the protrusion and two flanking shallow tracks for receiving the base flanges.
2. The system of claim 1 further comprising a support extending between the opposed lateral edges and having a surface for contacting the web and a notch in the surface to accommodate the protrusion.
3. The dryer of claim 1 wherein at least one of the pair of rollers is driven by a heavy-duty, variable-speed DC motor.
4. The dryer of claim 1 wherein the web is made of heat-resistant, polytetrafluoroethylene coated fiberglass mesh.
5. The dryer of claim 4 wherein the rollers are anodized aluminum rollers.
6. The dryer of claim 1 wherein the protrusion is spaced from an outer edge of the web and the protrusion is continuous along the length of the web.
7. The dryer of claim 6 wherein both rollers have at least one guiding groove therein for cooperating with the protrusion.
8. The dryer of claim 7 wherein the web has at least two longitudinal protrusions and the rollers have at least two guiding grooves therein for cooperating with the protrusions.
9. The dryer of claim 7 further comprising a second conveyor adjacent the conveyor and cooperating therewith.
10. The dryer of claim 9 wherein each conveyor includes a plurality of rollers.
11. The dryer of claim 1 wherein the web supports discrete textiles.
12. The dryer of claim 1 further comprising a heating element selected from the group consisting of a gas heater, electric heater, and an infrared radiant heating element.