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US 7,253,422 B2Granted
Container having irradiated indicia
AssigneeOwens-Illinois HealthCare Packaging Inc.
InventorRoger P. Smith
Life of this patent
Estimating the term…
Abstract
A method of making an identifiable container by providing a molded plastic container that includes at least one layer of material blended with an additive. A mask is provided having a radiation aperture in the form of identifiable indicia, and radiation is directed through the aperture of the mask and onto the container such that the radiation is absorbed by the additive, thereby causing the additive to visibly respond in the form of the identifiable indicia.
Claims11
A method of making an identifiable container, which includes:
- (a) providing a molded plastic container that includes at least one layer of plastic material blended with a fluorescing or phosphorescing agent,
- (b) providing a mask having a radiation aperture in the form of identifiable indicia, and
- (c) directing gamma radiation through said radiation aperture of said mask and onto said container such that said radiation is absorbed by said fluorescing or phosphorescing agent to form an overt watermark in the container in the form of said indicia.
A container that includes:
- a plastic wall having at least one layer of plastic material blended with a fluorescing or phosphorescing agent,
- said at least one layer having an overt watermark that has been made visible by absorption of gamma radiation,
- said overt watermark being in the form of identifiable indicia within said wall.
Dependencies are inferred from the claim text.