Patent ID: 7556136

Claim:
A belt module comprising: a first end portion and an opposite second end portion defining the length of the module; a first plurality of hinge elements disposed along the first end portion; a second plurality of hinge elements disposed along the second end portion; wherein the hinge elements of each plurality are spaced apart laterally across the width of the module; a plurality of cavities elongated in the length direction and extending through the module at laterally spaced locations across the width of the module; rollers disposed in the cavities for rotation on axles extending along the length of the module, the rollers having a diameter; dividers disposed between adjacent cavities and forming outward-facing surfaces between adjacent cavities; roller retention structure for retaining the axles and forming at least a portion of at least one of the hinge elements; wherein the roller retention structure includes a hinge element receiving each end of one of the axles, wherein the hinge elements at each end of the axle are insertable into the module.