Abstract: An example leveling device includes a first plate having a first set of positioning teeth and a second plate having a second set of positioning teeth. The first set of positioning teeth engage the second set of positioning teeth. The first plate is rotatable relative to the second plate to alter the angular relationship between the first plate and the second plate to provide a level surface.

Abstract: An improved method of forming fiber-reinforced plastic shells for bathtubs utilizes a fiber mat placed on a rear surface of a plastic shell. The fiber mat is infused with a resin, and is then cured. The mat and resin are preferably received within a vacuum chamber as the resin is infused. Further, the plastic shell is preferably supported on a fluidized bed during this process. The present invention eliminates the need for detailed air handling as is now required to handle impurities in the industrial air around the process of forming the bathtub shell.

Abstract: An open mold system provides various unique molds which are released from a plurality of staging queues and loaded onto a mold transportation circuit in relation to a particular customer order and transportation vehicle. A batch of molds are sequenced in an order in which a particular transportation vehicle is to be loaded. After each part is demolded, the molds are returned to their appropriate staging queues or storage areas. The parts are inspected and are sent to either a minor repair area, a major repair area, or directly to a trimming and packaging area. From the packaging area, the parts are moved to a relatively small shipping area where the batch of parts are already ordered to be effectively loaded directly onto the transportation vehicle. As the finished parts come off line in the batch particular to the transportation vehicle, a large shipping area and inventory area is avoided.