Container lid

• US 4,279,358 A
• Filed: 08/06/1979
• Issued: 07/21/1981
• Est. Priority Date: 08/06/1979
• Status: Expired due to Term

• Current Assignee: Stanley A. Jacobs
• Original Assignee: Stanley A. Jacobs
• Inventors: Jacobs, Stanley A.
• Primary Examiner(s): Lowrance, George E.
• Application Number:
  US06/064,062
• Time in Patent Office: 715 Days
• Field of Search: 220/306, 220/321, 220/322, 220/354, 220/90, 220/320, 215/DIG. 1
• US Class Current: 220/321
• CPC Class Codes: B65D 2543/00296 Plastic
• CPC Class Codes: B65D 2543/00435 Lids secured to an intermediate ring or like annular member fixed to the container mouth
• CPC Class Codes: B65D 2543/00472 Skirt
• CPC Class Codes: B65D 2543/00527 NO contact
• CPC Class Codes: B65D 2543/00537 on the outside, or a part turned to the outside of the mouth of the container
• CPC Class Codes: B65D 2543/00638 Rolled edge
• CPC Class Codes: B65D 2543/00685 Totality
• CPC Class Codes: B65D 2543/0074 Massive bead
• CPC Class Codes: B65D 2543/00796 Totality
• CPC Class Codes: B65D 2543/0099 Integral supplemental sealing lips
• CPC Class Codes: B65D 43/0212 only on the outside, or a part turned to the outside, of the mouth B65D43/0206 takes precedence
• CPC Class Codes: B65D 45/345 Lever-operated contractible or expansible band, the lever moving in the plane of the band
• CPC Class Codes: Y10S 215/01 Fins

Abstract

A one-piece molded plastic lid for a container is provided with a surrounding depending sidewall having a thin web portion which deforms as the lid is snap-fitted onto the container. The lid is intended to be used with containers having a protruding lip extending about the mouth of the container such as a paint can. The deformable web stretches into close conformity and sealing engagement with the lip, the lower regions of the skirt serving to maintain the web in a tightly constricted configuration about the lip.

Claims

1. A lid for a container having a sidewall and a lip protruding radially outwardly from the sidewall and extending about the periphery of the upper end of the container sidewall, the lid being formed from resilient plastic material and comprising:

a top wall;

a relatively thin sidewall web segment extending downwardly from the periphery of the top wall;

a relatively thick skirt integral with and extending downwardly from the lower end of the web, said skirt and web being dimensioned so that the skirt will display a greater resistance to radial expansion than the web;

the inner surface of the web defining a greater diameter than the inner surface of the skirt portion, thereby to define an inwardly-facing shoulder, the shoulder being spaced from the underside of the lid top wall by an amount substantially equal to the height of the container lip;

whereby the lid may be snap-fitted onto the container;

said web being sufficiently thin, and being dimensioned with respect to the container lip so that snap-fitting of the lid onto the container will require the web to stretch heightwise and to deform to and wrap around the outer periphery of the container lip when the shoulder is engaged with the underside of the container lip, said skirt portion being disposed below the container lip and being constructed and arranged as to retain web portion into firm and snug sealing engagement with the container lip.

2. A lid as defined in claim 1 further comprising:

the inner diameter of the skirt being substantially equal to the outer diameter of the container sidewall; and

the inner diameter of the web lying within an annulus, the inner diameter of which is greater than the outer diameter of the container sidewall and in which the outer diameter of which is no greater than the outside diameter of the container lip.

3. A lid as defined in claim 2 formed from low to medium density polyethylene, said web segment being of the order of 0.025 inches thick, and the skirt being of the order of at least 0.060 inches thick.

4. A lid as defined in claim 1 wherein the container has a channel extending about the container opening radially within the protruding lip, said lid further comprising;

a sealing ring molded integrally with and extending downwardly from the underside of the lid, the sealing ring being dimensioned with respect to the channel so as to be received in the channel.

5. A lid as defined in claim 4 wherein the sealing ring includes a pair of downwardly tapering sidewalls and a groove extending upwardly from and into the bottom of the sealing ring, the groove defining a pair of downwardly extending fingers including an inner and outer finger, each of the fingers being tapered downwardly in cross section.

6. A lid as defined in claim 5 wherein one of the fingers of the sealing ring is substantially thinner than the other in cross section.

7. A lid for a container having a sidewall and a lip protruding radially outwardly from the sidewall and extending about the periphery of the upper end of the container sidewall, the lid being formed from resilient plastic material and comprising:

a top wall;

a relatively thin sidewall web segment extending downwardly from the periphery of the top wall;

a relatively thick skirt integral with an extending downwardly from the lower end of the web, said skirt and web being dimensioned so that the skirt will display a greater resistance to radial expansion than the web;

the inner surface of the web defining a greater diameter than the inner surface of the skirt portion, thereby to define an inwardly-facing shoulder, the shoulder being spaced from the underside of the lid top member by an amount substantially equal to the height of the container lip;

the skirt portion being formed with an interruption; and

latch means mounted to the skirt on opposite sides of the interruption, the latch means being constructed and arranged to draw the skirt on opposite sides of the interruption circumferentially toward each other thereby to effect a circumferential constricting force on the skirt, the latch means being constructed and arranged to secure the skirt in its constricted configuration;

whereby the lid may be fitted onto the container and upon operation of the latch to constrict the skirt, the web will deform to the cross sectional contour of the container lip with the shoulder being urged into engagement with the underside of of the lip, said web being sufficiently thin, and being dimensioned with respect to the container lip so that upon operation of the latch, the web will stretch heightwise and will wrap around the outer periphery of the container lip.