Abstract: A method is set forth for forming laminated articles such as by pressing, blowing, and press and blow techniques, directly from a composite gob of molten glass having an inner core of one glass and an outer skin of a second glass. A charge of molten core glass is delivered from one supply of molten glass and a charge of molten skin glass from a separate supply is simultaneously delivered so as to surround the core glass. The composite charge is severed from their separate supplies so as to form a discrete composite gob of molten glass having a core glass encapsulated within a skin glass. The discrete composite charge of molten glass is delivered to a forming mold wherein a positive force such as pressing and/or blowing is applied to said charge of molten glass within the mold to form a laminated article having a core of one glass which is completely surrounded by a skin of a second glass.

Abstract: In the pressing of articles from molten glass, an insert of selected material is encapsulated within the glass article as the article is being press formed.

Abstract: In the encapsulation of insert materials within glass and glass-ceramic articles, not only must the bonding characteristics between the insert and the glass or glass-ceramic materials be considered, but also the relative coefficient of thermal expansions between the insert and the encapsulating materials must be programmed in order to avoid undue stresses in the article or the insert which could produce deleterious results.