Oliff & Berridge
Method and apparatus for forming seal portion of tubular body of synthetic resin
 An apparatus and method for forming a seal portion of a tubular body of synthetic resin is provided in which the seal portion has increased density and reduced foaming. The apparatus includes a pair of clamps that clamp an end portion of a tubular body of resin flat. A heater heats and fuses a projecting end portion projecting from the clamps. A bending member bends side projecting portions of the body formed during heating so that they are inwardly projecting. A press member presses the projecting end portion to form a seal portion. 
Yoshino Kogyosho Co., Ltd.
B B B B B Y B B B B B B B B B
B29C B29K B29C B29L B29C Y10S B29C B29C B29C B29C B29C B65B B29C B29C B29C
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Mamoru
Fujita