Patent ID: 7402333

Claim:
A preform for a tube-like plastic container, comprising: a circular mouth part; a bottomed drum part integrally formed with and continuously connected to said mouth part; and a continued portion between said drum part and said mouth part; wherein: said continued portion is formed into a projecting edge in a concentric circle in cross section, said drum part is formed into a flat wedge-like form in an elliptic or oval shape in cross section, a peripheral wall of said drum part is formed thicker in thickness than the wall of said mouth part, a bottom end of the bottomed drum is formed into a thinner flat bottom in wall thickness than the drum part, the drum part is tapered toward the bottom end on a slant, in the front and back walls of said drum part, the wall of the lower portion of the drum part is formed thicker in wall thickness than the wall of the upper portion of the drum part, and both sidewalls are formed on a gradual slant.