Plastic lid with stacking separation means
AssigneeShamrock Industries, Inc.
InventorsKenneth G. Weller, James V. Ostrum
Life of this patent
Estimating the term…
Abstract
A flexible, plastic lid of the type used for closing commodity containers is provided with protrusion segments on the inside surface of its side wall to provide vent openings between adjacent, stacked lids. A stacking shoulder around the periphery of the top wall of the lid is also provided with raised ribs for further holding stacked lids in spaced apart relation. Vent passages formed between stacked lids by the protrusion segments and the ribs lessen the suction effect which normally tends to hold such lids together when stacked for handling and storage.
Claims7
An improved, stackable lid for containers comprising:
- a substantially planar top wall, and a side wall formed integrally with said top wall from flexible material and depending from the periphery thereof as a skirt to form a container closure lid;
- a raised stacking ring on the upper surface of said top wall extending around the periphery thereof at a location spaced radially inwardly from said side wall, thereby forming a stacking shoulder on said top wall between said ring and said side wall;
- and
- a plurality of protrusion segments spaced apart around the inside surface of said side wall and projecting inwardly therefrom, said protrusion segments being sized and located to contact the outer surface of a stacking ring on an adjacent one of said lids with which said lid may be vertically stacked, whereby the spaces between said protrusions around the inside surface of said side wall comprise vent openings between the stacking rings and side walls of adjacent ones of said lids when a plurality of said lids are stacked together with the bottom of the side wall of each lid resting on the said stacking shoulder of an adjacent lid.
Dependencies are inferred from the claim text.