Patent ID: 6489717
Filing Date: 2002-12-03
Classification: C03B,H01J

Abstract:
A method for forming internally channeled light emitting display envelope comprising the steps of:(a) delivering and depositing a first or channel-forming ribbon of molten glass to a surface of a mold assembly having a mold cavity possessing at least one channel-forming groove formed therewith and a peripheral surface, wherein the channel-forming ribbon overlies the mold cavity and the peripheral surface of the mold assembly; (b) causing the channel-forming ribbon to molten glass to substantially conform to the contour of the mold cavity resulting in the information of at least one channel in the ribbon of the molten glass; (c) delivering and depositing a second or sealing ribbon of molten glass to the outer surface of the channel-forming ribbon of molten glass wherein the viscosity of the sealing ribbon is such that the sealing ribbon (i) bridges but does not sag into complete contact with the surface of at least one channel of the channel-forming ribbon and (ii) forms a hermetic seal wherever the seal ribbon contacts the channel-forming ribbon to form a glass article with at last one enclosed channel; (d) causing the sealing ribbon to stretch such that the sealing ribbon has a thin cross-section and so that the hermetic seal between the sealing ribbon and the channel ribbon has a thin cross-section having a thickness of less than 0.060â€³; and (e) removing the glass article from the mold.