Snap-on resealable lid for large-mouth containers

Claim 2

A closure comprising: a seating ring portion receivable on a container opening for registry of the closure with said opening; a skirt portion extending downwardly from said ring portion and having inwardly projecting lip means abuttingly engageable with outwardly projecting lip means around said opening; a compression ring on said skirt portion adjacent said inwardly projecting lip means; and a central portion joined to said seating ring portion by a circular wall extending downwardly from said seating ring portion and then turning inwardly toward the center of the closure; said seating rig portion and one portion of said downwardly extending wall cooperating to form a first annular channel, said downwardly extending wall having a lesser section thickness than the section thickness of said seating ring portion, and being more flexible than said seating ring portion.

Claim 3

The closure of claim 1 wherein: said skirt portion and said inwardly projecting lip means form a second annular channel; said channels cooperating with said skirt portion to form a wide annular channel of dovetail-shaped cross section.

Claim 4

The closure of claim 2 wherein: said seating ring portion, said skirt portion, said central portion and said circular wall are formed of a single homogeneous unit of molded plastic.

Claim 5

A container and closure combination comprising: a container neck of substantially greater diameter than height, and having an opening with a first lip extending radially inward at the opening and defining the inner circular margin of said opening, and a second lip extending radially outward below said opening; a closure including a first annular channel portion received on said neck and sealed thereon at said first lip, and a second annular channel portion received on said neck and interlocking with said second lip.

Claim 6

A container and closure combination comprising: a container neck of substantially greater diameter than height, and having an opening with a first lip extending radially inward at the opening and defining the inner circular margin of said opening, and a second lip extending radially outward below said opening; a closure including a first annular channel portion received on said neck and sealed thereon at said first lip, and a second annular channel portion received on said neck and interlocking with said second lip.

Claim 7

The combination of claim 4 and further comprising: a third annular channel on said closure and opening outward adjacent and below said second channel; and constrictor means in said third channel for maintaining the interlocking relationship between said second channel and said second lip.

Claim 8

The combination of claim 5 wherein said closure is made of plastic and said constrictor means include a ring to compensate for the cold flow of the plastic.

Claim 9

A container and closure combination comprising: a container opening wall with a first lip extending radially inward at the opening, and a second lip extending radially outward below said opening; a closure including a first annular channel received on said wall and sealed thereon at said first lip, and a second annular channel received on said wall and interlocking with said second lip; said first channel being inverted; said closure including a first channel entry wall extending downwardly and tapering inwardly from a diameter at least as great as the free inside diameter of said first lip to a diameter less than the free diameter of said first lip.

Claim 10

A container and closure combination comprising: a container opening wall with a first lip extending radially inward at the opening, and a second lip extending radially outward below said opening; a closure including a first annular channel received on said wall and sealed thereon at said first lip, and a second annular channel received on said wall and interlocking with said second lip; said first channel being inverted; said closure including a first channel entry wall extending downwardly and tapering inwardly from a diameter at least as great as the free inside diameter of said first lip to a diameter less than the free diameter of said first lip.

Claim 11

The combination of claim 7 wherein: said closure has a skirt portion between said channels; said first channel entry wall projects from said first channel toward the interior of said container; and a central top portion is included on said closure and has a flexible marginal portion joining said channel entry portion near the point of innermost projection into the interior of said container; said skirt portion being sufficiently rigid to tighten upon said second lip when said central top portion is moved outward by pressure in said container.

Claim 12

The combination of claim 7 wherein: said closure has a central top portion with a downwardly turned perimetrical junction wall, said junction wall being joined at the bottom to the bottom of said entry wall.

Claim 13

The combination of claim 9 wherein: said entry wall and said junction wall form an acute angle, said junction wall and the junction thereof with said entry wall being sufficiently flexible for unfolding in response to pressure in said container.

Claim 14

A closure comprising: a seating ring portion receivable on a container opening for registry of the closure with said opening; a skirt portion extending downwardly from said ring portion and having inwardly projecting lip means abuttingly engageable with outwardly projecting lip means around the opening; a circular wall extending downwardly from said seating ring portion and then turning inwardly toward the center of the closure; and a central portion joined to said seating ring portion by said circular wall; said seating ring portion and one portion of said downwardly extending wall forming a first inverted annular channel; said skirt portion and said inwardly projecting lip means forming a second annular channel; the other portion of said downwardly extending wall tapering inwardly from said one portion of said downwardly extending wall to provide a channel entry wall; said downwardly extending wall having a lesser section thickness than the section thickness of said seating ring portion and being more flexible than said seating ring portion; and said closure being one homogeneous unit of material.

Claim 15

A closure comprising: a seating ring portion receivable on a container opening for registry of the closure with said opening; a skirt portion extending downwardly from said ring portion and having inwardly projecting lip means abuttingly engageable with outwardly projecting lip means around the opening; a circular wall extending downwardly from said seating ring portion and then turning inwardly toward the center of the closure; and a central portion joined to said seating ring portion by said circular wall; said seating ring portion and one portion of said downwardly extending wall forming a first inverted annular channel; said skirt portion and said inwardly projecting lip means forming a second annular channel; the other portion of said downwardly extending wall tapering inwardly from said one portion of said downwardly extending wall to provide a channel entry wall; said downwardly extending wall having a lesser section thickness than the section thickness of said seating ring portion and being more flexible than said seating ring portion; and said closure being one homogeneous unit of material.

Claim 16

A container and closure combination comprising: a container opening wall with a first lip extending radially inward at the opening, and a second lip extending radially outward below said opening; a closure including a first annular channel received on said wall and sealed thereon at said first lip, and a second annular channel received on said wall and interlocking with said second lip; said first channel being inverted; said closure having a skirt portion between said channels; said closure including a first channel entry portion projecting from said first channel toward the interior of said container; and a central top portion on said closure and having a flexible marginal portion joining said channeL entry portion at the point of innermost projection of said channel entry portion into the interior of said container, and said skirt portion being sufficiently rigid to tighten upon said second lip when said central top portion is moved outward by pressure in said container.

Claim 17

A container and closure combination comprising: a container opening wall with a first lip extending radially inward at the opening, and a second lip extending radially outward below said opening; a closure including a first annular channel received on said wall and sealed thereon at said first lip, and a second annular channel received on said wall and interlocking with said second lip; said first channel being inverted; said closure having a skirt portion between said channels; said closure including a first channel entry portion projecting from said first channel toward the interior of said container; and a central top portion on said closure and having a flexible marginal portion joining said channeL entry portion at the point of innermost projection of said channel entry portion into the interior of said container, and said skirt portion being sufficiently rigid to tighten upon said second lip when said central top portion is moved outward by pressure in said container.

Claim 18

The combination of claim 12 wherein said closure is one homogeneous unit of material.