Converter Accessory Corporation (CAC) has introduced Simplok, its new line of unwind/rewind modules. SimpLok is designed for converters that want to increase capacity, improve web control, ease roll changes for increased production or for adding unwind or rewind stations to an existing converting machine, CAC says. SimpLok shaft holders and unwind/rewind modules are available in standard, medium and heavy duty. They handle rolls from 50 to 5,000 pounds. Unwind and rewind shafts are captured with ball bearings to ensure optimum tension control. They are available with brake or drive mounting provisions.