Preparing Glass Containers for Electrostatic Coating
AssigneeOwens-Brockway Glass Container Inc.
InventorMichael P. Remington
Life of this patent
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Abstract
A glass container and related methods of manufacturing and coating glass containers. The container includes a hot end coating that is deposited on an exterior surface and that includes a metal oxide, and a dopant to reduce electrical resistivity of the exterior surface of the container. The container also includes an organic coating electrostatically applied to the exterior surface of the container. Preferably, the organic coating is applied at an ambient temperature and without having to use grounding pins, without having to heat the container, and without having to apply an additional conductive coating layer.
Claims22
A glass container made by the following method steps:
- (a) contacting an exterior surface of the container with a mixed gas including a metal compound and a dopant compound including at least one dopant selected from the group consisting of F, Cl, B, P, and Sb, to form a doped metal oxide coating on said exterior surface of the container to reduce electrical resistivity of said exterior surface of the container;
- and
- (b) electrostatically applying an organic coating to said exterior surface of the container after step (a) and being carried out at less than 150 degrees Fahrenheit.
A glass container that includes:
- an axially closed base at an axial end of the container;
- a body extending axially from said closed base and being circumferentially closed;
- and
- an axially open mouth at another end of the container opposite of said base;
- wherein an exterior surface of the container includes an organic coating electrostatically applied thereto over an electrically conductive hot end coating that includes a metal oxide and a dopant, wherein said dopant is selected from the group consisting of:
- F, Cl, B, P, and Sb.
A glass container made by the following method steps:
- (a) forming the container,
- (b) applying a hot end coating to an exterior surface of the container, wherein said hot end coating includes a metal oxide, and a dopant to reduce electrical resistivity of said exterior surface of the container,
- (c) annealing the container coated in step (b),
- (d) applying a cold end coating to said exterior surface of the container,
- (e) inspecting the container, and
- (f) electrostatically depositing an organic coating on the container at less than 150 degrees Fahrenheit and without having to use grounding pins, without having to heat the container, and without having to apply an additional conductive coating layer after step (b).
Dependencies are inferred from the claim text.