Toppan Printing Co., Ltd.

Yusuke Terauchi

Toshiaki Kakemura

Chiaki Takasaki

Tatsuo Furuse

A mold for plastic bottles is designed to have an internal arithmetic average of roughness height of a cavity-forming wall to be less than 0.25 .mu.m. The mold has air passages for decompressing air in the cavity and absorbing the air between the wall and a parison expanded by blowing into it. The mold has air suction passages around the mouth portion of the mold and between the main body and the bottom portion of the mold. The surface of the bottle and the molds have so little air stagnated between the mold and the bottle wall that the resulting bottle results in a high gloss.

Growing community of inventors

Tokyo, Japan

Yusuke Terauchi