Preparing glass containers for electrostatic coating
AssigneeOwens-Brockway Glass Container Inc.
InventorMichael P. Remington, Jr.
Life of this patent
Estimating the term…
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.
Claims19
A method of coating a glass container, which includes the steps of:
- (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 method of manufacturing a glass container, which includes the steps of:
- (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.