Abstract: A pneumatically operated flex-pack case packer for servicing a form-fill-seal machine. The flex-pack case packer employs a two-stage displacement cylinder to move an interchangeable head assembly having grippers that, when moved into position to receive severed flexible pouches from the form-fill-seal machine, grasp the flexible pouches. The head assembly is then retracted and swung from its horizontal position to a vertical position. Once an open top container is indexed into position, the head assembly is lowered toward the container and the grippers open to release the flexible pouches. Also, the lateral distances between the flexible pouches as they are held by their respective grippers can be expanded or contracted by using an air cylinder to actuate a rocker arm. A programmable controller coordinates all air control valve and solenoid activity.