Abstract: A fastener feed head includes a chute having a feed passage along a feed axis to support and guide fasteners from a chute inlet to a chute outlet connected to a fastener installation head. A carriage is movably attached to the chute along a feed axis. Opposed pawls are pivotably attached to the carriage. The carriage reciprocates along the feed axis between a retracted position and a feed position. The carriage cyclically advances a predetermined number of fasteners from a queue of fasteners in an upstream zone into a queue of fasteners in a downstream zone by: retracting to the retracted position from the feed position; abutting the lead fastener in the upstream queue with the pawls; and, driving the lead fastener with the pawls until the carriage reaches the feed position.

Abstract: A fastener feed head includes a chute having a feed passage along a feed axis to support and guide fasteners from a chute inlet to a chute outlet connected to a fastener installation head. A carriage is movably attached to the chute along a feed axis. Opposed pawls are pivotably attached to the carriage. The carriage reciprocates along the feed axis between a retracted position and a feed position. The carriage cyclically advances a predetermined number of fasteners from a queue of fasteners in an upstream zone into a queue of fasteners in a downstream zone by: retracting to the retracted position from the feed position; abutting the lead fastener in the upstream queue with the pawls; and, driving the lead fastener with the pawls until the carriage reaches the feed position.