Patent ID: 7125182
Filing Date: 2006-10-24
Classification: B41J,B65H

Abstract:
1. In combination: a shaft having a threaded portion with right-hand threads and a threaded portion with left-hand threads, a hub to mount a web supply roll, the hub threadably receiving one of the threaded portions, a carrier threadably receiving the other threaded portion, at least one opening in the carrier, at least one clamp member movably mounted on the carrier between retracted and extended positions, wherein a supply roll is capable of being loaded onto the hub when the clamp member is in its retracted position and capable of being clamped at a side of the supply roll when the clamp member is in its extended position, and at least one rod received by the hub and extending into the opening in the carrier, the opening in the carrier being large enough to enable the carrier to rotate together with the shaft relative to the rod, the rod cooperating with the clamp member to move the clamp member from its retracted position to its extended position and to move the hub and the carrier with its clamp member toward each other to clamp the supply roll in a center-justified position upon rotation of the shaft in one direction and to move the hub and the clamp member away from each other and to move the clamp member from its extended position to its retracted position upon rotation of the shaft in the opposite direction.