Contact lens packaging
AssigneeContact Lens Precision Laboratories Limited
InventorsJohn Clamp, Richard Newell
Life of this patent
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Abstract
Disclosed is a stack of individually separable packages for a plurality of contact lenses, each individual lens being packaged between a first surface and a second surface, wherein the first surface is provided by a first one of the individually separable packages and the second surface is provided by a second one of the individually separable packages.
Claims13
A stack of individually separable packages for a plurality of contact lenses, each individual lens being packaged between a first surface and a second surface,
- wherein the first surface is provided by a first one of the individually separable packages and the second surface is provided by a second one of the individually separable packages,
- wherein each package comprises:
- a concave cup-shaped portion which accommodates a contact lens and an aqueous liquid;
- and a peripheral portion;
- the packages being stacked such that the concave cup-shaped portion of one package is partially accommodated within the concave cup-shaped portion of an adjacent package, thereby reducing dead volume in the stack,
- wherein adjacent members of the stack are sealed to one another by a mechanical sealing fit, and
- wherein the packages comprise a frangible portion which is broken or ruptured if adjacent packages are separated, such that a tamper-evident seal is provided.
A method of making a stack of a plurality of individually separable contact lens packages, the method comprising the steps of:
- (a) forming a plurality of empty individual contact lens packages, each package comprising a concave cup-shaped portion which accommodates a contact lens;
- (b) inserting a contact lens and an aliquot of suitable aqueous liquid in a cavity in the concave cup-shaped portion of a first package;
- and
- (c) sealing the contact lens and aqueous liquid in the cavity by positioning a second package on top of the first package, such that the concave cup-shaped portion of the second package is partially accommodated within the concave cup-shaped portion of the first package, and sealing the second package to the first,
- wherein adjacent members of the stack are sealed to one another by a mechanical sealing fit, and
- wherein the packages comprise a frangible portion which is broken or ruptured if adjacent packages are separated, such that a tamper-evident seal is provided.
Dependencies are inferred from the claim text.