Abstract: A method for producing a bladder includes shaping a mass of crude rubber containing an oil component into a specified bladder shape by a mold; vulcanizing the shaped bladder in the mold; removing the vulcanized bladder from the mold; placing the vulcanized bladder in an environment having a high temperature to keep the vulcanized bladder in the high temperature for a specified time to remove the oil component from the vulcanized bladder; and coating an outer surface of the oil component-removed bladder with a separating agent layer.

Abstract: A slot machine of the type having a number of drums, an actuating lever, a kicker, a drum rotating mechanism, detecting mechanism for detecting any hit mode and a coin discharging mechanism. An actuating frame and a kicker engaging with the hook of the actuating lever are formed as different bodies. When the kick projections of the kicker hit the ridge of an index notched disk provided on the drum, it is allowed to escape in the reverse direction at once. The kicker is adapted for energizing operation when each kick projection enters a notch of a corresponding notched disk, whereby the kick projections are protected from excessive loading. Moreover, when the rotary drums are stopped, the hit mode according to the permutations displayed on the rotary drums is automatically detected.

Abstract: A slot machine comprising a plurality of rotatable drums bearing pictures, symbols, etc. on their peripheries, a plurality of coin cases, a mechanism for rotating the drums, a mechanism for stopping the drums, and a mechanism for discharging coins. By a simple operation of pulling an actuating lever forward, the slot machine automatically rotates the drums for a period of time, automatically stops the drums in regular sequence and at intervals, and automatically discharges coins by opening one or some or all of the coin cases when one or more predetermined pictures, symbols, etc. or a predetermined combination thereof is obtained. Thus, the slot machine of the invention is easy to operate, and offers diversified and interesting games.