Patent ID: 7429013

Claim:
In combination: an axially extending shaft having a threaded portion with right-hand threads and a threaded portion with left-hand threads, the shaft having opposite end portions, a motor coupled to one end portion, a manually engageable handle coupled to the other end portion, a hub to support web rolls of different widths and threadably receiving one of the threaded portions, a carrier threadably receiving the other threaded portion, at least one opening in the carrier, a mounting block, the shaft being rotatably received by the mounting block, the hub being disposed axially between the mounting block and 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, at least one rod mounted by the mounting block and slidably 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.