Gasketless Closure For Open-Top Pails

a gasketless, open-top technology, applied in the field of lids, can solve the problems of adding more cost and complexity to the manufacturing process, and reducing the recycling rate of the closure, so as to achieve the effect of leakage of fluids from the container

Pending Publication Date: 2019-09-19
LETICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]As a result of the design of the closure herein described and the cooperation between the closure and the pail, a firm and reliable gasketless seal that can withstand rough handling without leakage is accomplished in a cost-efficient fashion. By virtue of the seal, air is prevented from entering container during storage to spoil or otherwise adversely affect perishable content, and leakage of fluids from the container in the event of tip overs, drops, and other handling events is substantially prevented.

Problems solved by technology

The gasket itself adds to the cost of the product and the placement of the gasket into the channel is a secondary operation that adds still more cost and complexity to the manufacturing process.
This presents a competitive disadvantage; moreover, recycling of the closure becomes more complex because of the different materials used to make the closure and the gasket.
Again, this puts pressure on the design, manufacture, and maintenance of the tooling used to injection mold the HDPE lid and pail.
Further, the seals can lose effectiveness due to age and / or damage to the pail rim or the closure channel through ordinary handling.

Method used

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  • Gasketless Closure For Open-Top Pails
  • Gasketless Closure For Open-Top Pails
  • Gasketless Closure For Open-Top Pails

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018]Referring to FIG. 1 there is shown a molded plastic closure 10 for a five-gallon open-top molded plastic pail 12 having a tapered sidewall 14 and a wire bail 16. Both the closure 10 and the pail 12 are preferably injection molded from HDPE. Other plastics, such as polypropylene, can also be used.

[0019]The closure 10 has an annular peripheral portion 18 surrounding a generally circular inner deck portion 20 and is sized to fit on the pail 12 in such a way as to “lock” onto the pail and provide a seal to prevent both the ingestion of air into the pail 12 as well as to prevent leakage from any fluid carried by the pail in the fully closed condition. This representation is intended to be generic in nature; i.e., it shows a typical pail / closure configuration wherein the closure has a “plug fit” on the pail rim, and also has a “tear strip” on the outer skirt, details of which are omitted here but can be found in the Schwarz patent identified above, incorporated herein by reference.

[...

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PUM

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Abstract

A molded plastic closure is configured to provide a plug fit with the top rim of an open top container having an outwardly protruding rim flange. A two-part seal preventing leakage of fluid from the container is provided by means of a ridge structure on the inner wall of the inverted U-shaped channel of the closure peripheral structure as well as a flexible sealing wiper appendage which is formed integrally with the top of the inverted U-shaped structure and which deformingly contacts the top surface of the container rim when the rim is essentially fully inserted into the U-shaped channel. The wiper appendage is formed to angle toward the inner channel wall in the undeflected condition.

Description

FIELD OF THE INVENTION[0001]This invention relates to closures; i.e., “lids,” for open-top pails and, more particularly, to a plug fit closure that provides an effective seal between the closure and the pail without the use of a conventional gasket.BACKGROUND[0002]Molded plastic closures for open-top pails are in wide spread use and are available from numerous manufacturers including the Letica Corporation of Rochester, Mich. The pails, also called “containers,” and closures are generally made from high density polyethylene, hereinafter “HDPE,” and are injection molded in a range of capacities from about one to six gallons and may or may not have pouring spouts and bails for carrying. The closures snap or “lock” firmly on the pails and may have various means such as tear bands on an outer skirt to aid in removal from the pail.[0003]Where such pails are used to carry perishable goods or fluids, it is common to design the closure to provide a “plug fit” wherein the pail rim extends in...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D43/02
CPCB65D43/0208B65D2543/00555B65D2543/00953B65D2543/00092B65D2543/00296B65D2543/005B65D2543/00537B65D43/0258B65D2543/00509B65D2543/00657B65D2543/00685B65D2543/0074B65D2543/00796B65D2543/0099
Inventor SELINA, JOHN R.LARSEN, CHRISTOPHER MYLESLETICA, ANTONHABITZ, ARTHUR
Owner LETICA
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