Plastic closures for containers and cans and methods of and apparatus for producing such closures
AssigneeInnovative Closures, Inc.
InventorMortimer S. Thompson
Life of this patent
Estimating the term…
Abstract
A container or can having a body and end portion which include plastic free ends and which are joined and sealed by cooperatively curling the juxtaposed ends. The body portion has an opening surrounded by a free end suitable for curling. The container end portion has a generally flat or dish shaped central lid portion with a peripheral skirt having a free end adaptable to the container body free end and suitable for curling. The container body and end portions are joined by juxtaposing their free ends so that they form a double wall followed by curling with a curling tool to intimately engage the ends and concurrently curve the perimeters thereof to one another in a tightly curled configuration.
Claims15
A container comprising:
- a body having a free end of plastic,
- an end portion having a central portion and a peripheral skirt including a free end of plastic, and
- said free ends being in juxtaposition and continuously flexed to form a curled double wall seam of plastic which joins said end portion to said body, and wherein at least one of said curled free ends of plastic includes developed stress along its length which causes said free ends to maintain engagement therebetween wherein during curling said at least one free end which includes developed stress is maintained at a temperature below its softening point.
Dependencies are inferred from the claim text.