A pillow packaging bag, a pillow type packaging body, a heat seal bar for pillow packaging machine, and a pillow packaging machine. The hub rests floats in the pool and the spokes can be lengthened as needed to accommodate pools of various shapes, such as an oval pool. A yoke is fixedly mounted to an inner peripheral surface of the housing by plate springs, and a vertically polarized magnet is mounted on the yoke. A surface feature is disposed on the external wall for providing anchoring functionality. Cooling functions are provided externally of the conductor element and may be by means of conventional cryogenic cooling systems.