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US 7,464,825 B2Granted
Pressure resistant base
AssigneeGraham Packaging Company, L.P.
InventorsRichard Johnston, Doug Struble, Debra Finnigan
Life of this patent
Estimating the term…
Abstract
A base structure having a bearing surface defining a bearing plane and an inner portion spaced apart from the bearing surface in a direction that is substantially perpendicular to the bearing plane. The inner portion includes a first surface, a second surface spaced apart from said first surface, and a step merging said first surface with second surface.
Claims11
A base structure for a plastic container, the base structure comprising:
- a bearing surface defining a bearing plane and;
- an inner portion spaced apart from the bearing surface in a direction that is substantially perpendicular to the bearing plane, said inner portion comprising a first surface, a second surface spaced apart from said first surface, and a step merging said first surface with said second surface;
- wherein an outer boundary of said second surface defines an ellipse having a major and minor axis, and wherein said second surface is slightly concave in a direction towards a cavity of the container along the major axis and slightly convex in a direction towards the bearing plane along the minor axis.
A base structure for a plastic container, the base structure comprising:
- a bearing surface defining a bearing plane and;
- an inner portion spaced apart from the bearing surface in a direction that is substantially perpendicular to the bearing plane, said inner portion comprising a first surface, a second surface spaced apart from said first surface, and a step merging said first surface with said second surface;
- wherein said bearing surface comprises an outer portion for merging with a sidewall of the container, a bearing portion for defining a plurality of touch points for contact with a horizontal surface, and a transitional portion for merging with said inner portion;
- wherein said bearing portion defines four touch points;
- and wherein said transitional portion includes a substantially circular inner boundary for merging with said inner portion with and an outer boundary defining a rectangle having chamfered corners for merging said bearing portion and further defining the four touch points.
2 more elements
A method of packaging a product, comprising the steps of:
- providing a container having a base structure comprising;
- a bearing surface defining a bearing plane and;
- an inner portion spaced apart from the bearing surface in a direction that is substantially perpendicular to the bearing plane, said inner portion comprising a first surface, a second surface spaced apart from said first surface, and a step merging said first surface with said second surface wherein an outer boundary of said second surface defines an ellipse having a major and minor axis, and wherein said second surface is slightly concave in a direction towards a cavity of the container along the major axis and slightly convex in a direction towards the bearing plane along the minor axis;
- placing the product into the container;
- and
- providing an air tight seal over a mouth of the container.
3 more elements
Dependencies are inferred from the claim text.