Abstract: An internal tensioning structure for use in an inflatable product fulfills the basic function of maintaining two adjacent inflatable surfaces in a desired geometric arrangement when the inflatable product is pressurized. The tensioning structure is formed by connecting a pair of plastic strips sheets via spaced-apart strands, such as strings or wires. When pulled taut, the strands provide a high tensile strength between the two opposed plastic strips. At the same time, the plastic strips facilitate a strong, long-lasting weld between the tensioning structure and the inflatable product.

Abstract: A chlorine generator includes a main water channel for connecting to a pool and a subsidiary water channel connected between two points on the main water channel. A feed valve, a brine tank, a pump and an electrolytic tank are located on the subsidiary water channel. Salt is added into the brine tank and dissolved in water drawn in from the main water channel, and the high concentration saline solution is pumped from the brine tank into the electrolytic tank where chlorine is generated from the saline. The chlorinated solution from the electrolytic tank is then mixed with the water in the main water channel. A stirring device is provided at the bottom of the brine tank to stir the water therein to facilitate the generation of high concentration saline solution. Salt is electrolyzed without being dissolved into the swimming pool directly, thereby reducing harmful effects to swimmers.