초록 ▼

In a process for making a multi-chambered container that is lightweight, relatively inexpensive to produce, and that requires less external reinforcement against flexure than conventional multi-chambered containers do, a parison is heated and inflated to form the container. Further, first and second

In a process for making a multi-chambered container that is lightweight, relatively inexpensive to produce, and that requires less external reinforcement against flexure than conventional multi-chambered containers do, a parison is heated and inflated to form the container. Further, first and second pinched-in areas are fashioned in the sidewall of the container. The first pinched-in area includes first and second wall portions that extend inwardly toward an interior of the main body of the container, and a first end wall portion connecting the first and second wall portions. The second pinched-in area includes third and fourth wall portions that extend inwardly toward an interior of the main body, and a second end wall portion connecting the third and fourth wall portions. The first end wall portion is joined to said second end wall portion so as to define separate compartments within said main body, and wherein the first end wall portion is laterally offset from the second end wall portion, whereby the flexibility of the main body about the joint of the first and second wall portions is minimized. In the next step, the container is cooled.

대표청구항 ▼

In a process for making a multi-chambered container that is lightweight, relatively inexpensive to produce, and that requires less external reinforcement against flexure than conventional multi-chambered containers do, a parison is heated and inflated to form the container. Further, first and second

In a process for making a multi-chambered container that is lightweight, relatively inexpensive to produce, and that requires less external reinforcement against flexure than conventional multi-chambered containers do, a parison is heated and inflated to form the container. Further, first and second pinched-in areas are fashioned in the sidewall of the container. The first pinched-in area includes first and second wall portions that extend inwardly toward an interior of the main body of the container, and a first end wall portion connecting the first and second wall portions. The second pinched-in area includes third and fourth wall portions that extend inwardly toward an interior of the main body, and a second end wall portion connecting the third and fourth wall portions. The first end wall portion is joined to said second end wall portion so as to define separate compartments within said main body, and wherein the first end wall portion is laterally offset from the second end wall portion, whereby the flexibility of the main body about the joint of the first and second wall portions is minimized. In the next step, the container is cooled. hod of claim 2, wherein the step of locating the trip mold plate further includes horizontally moving the center mold plate from a first position substantially vertically unaligned with the top mold plate to a second position substantially vertically aligned with the top mold plate. 7. The method of claim 2, wherein the step of forming a plurality of core hemispherical shells from elastomeric material further includes: providing a lower elevator having a movable upper plate; and after applying heat and pressure to the top and bottom mold plates, separating the mold plates by moving the upper plate upward. 8. The method of claim 1, wherein the step of forming a plurality of shells comprises placing elastomeric material into the top and bottom mold plate cavities.