Antinesting preforms for blow-molded articles
AssigneeSoutheastern Container
InventorsHenry M. Pinto, John Bombace, Paul La Barre
Life of this patent
Estimating the term…
Abstract
A tubular preform for a blow-molded container. The preform has a closed end and an opposite open end, the relative dimensions of the ends being such that the closed end would be receivable in the open end of a similar preform to nest there were it not for the provision of an antinesting feature in the form of a plurlity of axially extending ribs which protrude inwardly from the inner surface of the preform adjacent to the open end to prevent entry of another preform.
Claims9
A preform for a blow-molded container, comprising a generally tubular body formed about a central axis and having inner and outer surfaces surrounding the axis, a first end open to the inner surface, a second end opposite to the first end, a wide portion of the tubular body adjacent the first end, a narrow portion of the tubular body axially spaced from the second end, the outer surface at the narrow portion having a radial dimension smaller than the radial dimension of the inner surface at the wide portion, wherein the improvement comprises at least one axially extending rib located along the inner surface at the wide portion and protruding radially inwardly from the inner surface of the wide portion a radial distance greater than the distance between the radial dimension of the outer surface of the narrow portion and the radial dimension of the inner surface of the wide portion to prevent a narrow portion of a similar preform from nesting within the wide portion.
A preform for a blow-molded container, comprising a generally tubular body formed about a central axis and having inner and outer surfaces surrounding the axis, a first end open to the inner surface, a second end opposite to the first end, a wide portion of the tubular body adjacent the first end, a narrow portion of the body axially spaced from the second end, the outer surface at the narrow portion having a radial dimension smaller than the radial dimension of the inner surface at the wide portion, wherein the improvement comprises a plurality of axially extending ribs located along the inner surface at the wide portion and each rib protruding radially inwardly from the inner surface of the wide portion a distance so that the sum of the distances for the ribs is greater than the difference between the radial dimension of the outer surface of the narrow portion and the radial dimension of the inner surface of the wide portion to prevent a narrow portion of a similar preform from nesting within the wide portion.
Dependencies are inferred from the claim text.