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US 12,759,251 B2Granted
Polyester resin closures for containers
AssigneeOrigin Materials Operating, Inc.
InventorsJay Clarke Hanan, Rachel Hess
Life of this patent
Estimating the term…
Abstract
Thermoformed polyester resin closures for closing containers, the polyester resins including polyethylene terephthalate (“PET”), polyethylene furandicarboxylate (“PEF”), or a copolymer including PET and PEF, are provided herein. Methods of making the thermoformed closures are further provided. Methods of sterilizing the thermoformed closures are further provided.
Claims21
A method of making a closure that mounts onto a finish of a container;
- the closure comprising at least one layer that comprises:
- (a) an outer layer that comprises:
- (i) an outer layer annular wall;
- (ii) an outer layer outer cylindrical wall extending downward from the outer layer annular wall;
- (iii) an outer layer inner depression wall that extends downwardly from the outer layer annular wall;
- and
- (iv) an outer layer lower wall that extends across a bottom of the outer layer inner depression wall and;
- (b) an inner layer that comprises:
- (i) an inner layer annular wall configured to seat against a top surface of a rim of the finish;
- (ii) an inner layer outer cylindrical wall that extends downwardly from the inner layer annular wall;
- (iii) an inner layer inner depression wall that extends downwardly from the inner layer annular wall;
- and
- (iv) an inner layer lower wall that extends across a bottom of the inner layer inner depression wall;
- the method comprising thermoforming a sheet of a polyester resin into the closure.
11 more elements
A method of making a closure that mounts onto a finish of a container;
- the closure comprising at least one layer that comprises:
- (a) an annular wall configured to seat against a top surface of a rim of the finish;
- and
- (b) an outer cylindrical wall extending downward from the annular wall;
- the method comprising:
- thermoforming a sheet of a polyester resin into the closure, wherein thermoforming comprises applying the sheet of the polyester resin to a male mold, and
- applying a vacuum or pressure to motivate the sheet of the polyester resin into the male mold, wherein the vacuum or pressure is applied at a range of from about 1 bar to about 10 bar.
4 more elements
A method of making a closure that mounts onto a finish of a container;
- the closure comprising at least one layer that comprises:
- (a) an outer layer that comprises:
- (i) an outer layer annular wall;
- and
- (ii) an outer layer outer cylindrical wall that extends downwardly from the outer layer annular wall;
- and
- (b) an inner layer that comprises:
- (i) an inner layer annular wall;
- and
- (ii) an inner layer outer cylindrical wall that extends downwardly from the inner layer annular wall;
- the method comprising thermoforming a sheet of a polyester resin into the closure;
- wherein the inner layer is thermoformed from a first sheet of polyester resin, and the outer layer is thermoformed from a second sheet of polyester resin;
- and
- wherein the inner layer and the outer layer are thermoformed using different molds.
11 more elements
Dependencies are inferred from the claim text.