Molded plastic pail with double lock
AssigneeLetica Corporation
InventorChristopher L. Davis
Life of this patent
Estimating the term…
Abstract
A molded plastic container and closure is provided with a double lock, the top lock being formed by the container rim and a protrusion on the inside of the closure channel. The bottom lock is formed by a segmented flange on the container sidewall and a second annular protrusion on the inside of the closure skirt. A zig-zag tear line allows the second lock to be removed thereby to create alternating areas of greater and lesser clearance between the newly formed skirt edge and a second, lower flange on the container sidewall.
Claims9
A molded plastic container and closure combination comprising:
- a container having a substantially cylindrical sidewall and an open top with a peripheral rim;
- a first segmented circumferential flange on the exterior of said sidewall below said rim having gaps therein;
- a second continuous, circumferential flange on the exterior of said sidewall below said first flange;
- a closure having an inverted U-shaped peripheral channel defined by a radially spaced inner wall and outer skirt respectively;
- said outer skirt having a first internal locking protrusion which coacts with said rim and a second internal locking protrusion which coacts with said first flange, and a tear line between said first and second internal protrusions;
- said tear line being of a zig-zag path to define, when separated, a plurality of circumferentially spaced grasp tabs separated by clearances;
- at least some of said tabs overlying said gaps in the first flange;
- wherein the number of segments in the first flange is different from the number of tabs in said outer skirt after tearing.
A molded plastic container and closure combination comprising:
- a container having a substantially cylindrical sidewall and an open top with a peripheral rim;
- first and second circumferential flanges formed on the exterior of said sidewall at vertically spaced locations below said rim;
- a closure having an inverted U-shaped peripheral channel defined by a radial space between an inner wall and an outer skirt;
- said outer skirt having a first internal locking protrusion which coacts with said rim and a second internal locking protrusion which coacts with said first flange to hold the closure on the container, and a zig-zag tear line lying entirely between said first and second protrusions;
- said inner wall extending vertically substantially beyond the tear line;
- the uppermost of said first and second circumferential flanges being uniformly interrupted to form gaps therein;
- the number of gaps being different from the number of discontinuities in said zig-zag tear line.
Dependencies are inferred from the claim text.