Abstract: A method and apparatus are provided for applying a profile with adjacent ribs to a traveling film web to form an adjacent rib-type zipper. The device includes a first extruder for extruding a base member, and a mechanism for joining the base member to a bag film web. A second extruder is provided for extruding a male profile member, a first rib member and a second rib member as three separate extrudates. The extruder is configured for joining the profile member, first rib member and second rib member to the bag film in an aligned relation such that the profile member is disposed between the first and second rib members.

Abstract: An isolated electrical power generation system is described with multiple isochronous, load-sharing engine-generator units. The system includes load sensing means for generating a signal representing the individual power output of each engine-generator unit, means for generating a signal representing the total power output of all the engine-generator units in the system, and load-sharing means responsive to deviations between each individual power output signal and the total power output signal for controlling the fuel inputs to the respective engines in the various units. A load simulating means responds to the occurrence of a preselected condition, such as an excessive temperature, in an individual unit for adding a simulated power output signal to the individual power output signal for that particular unit.