초록 ▼

A pressure-resistant thermoplastic container has a low center of gravity and a dimensionally stable seating ring zone of substantial strength. The center of gravity is lowered by reducing the weight of the finish and neck, and using a larger diameter for the main body to reduce the overall height wh

A pressure-resistant thermoplastic container has a low center of gravity and a dimensionally stable seating ring zone of substantial strength. The center of gravity is lowered by reducing the weight of the finish and neck, and using a larger diameter for the main body to reduce the overall height while maintaining the desired internal volume. The improved design of the seating ring results in a thicker wall in the bottom end and, therefore, a stronger structure. The bottom end includes a sharp V-shaped structure having a concave inside wall and a generally convex outside wall joined at the bottom ends by a return portion. A convex central portion is connected to an upper end of the inner wall to define a central cavity and an extreme lower end of the outer wall is generally concave.

대표청구항 ▼

In a bottle for the retention of fluids under pressure, having a neck portion, a bottom portion and a side wall interconnecting the neck portion and the bottom portion, the bottom portion comprising: an inner wall defining a central cavity; a generally convex outer wall; a return portion joining low

In a bottle for the retention of fluids under pressure, having a neck portion, a bottom portion and a side wall interconnecting the neck portion and the bottom portion, the bottom portion comprising: an inner wall defining a central cavity; a generally convex outer wall; a return portion joining lower ends of said inner wall and said outer convex wall to define a seating ring with the extreme lower end of said outer wall adjacent said return portion being concave.