Glass article with reduced thickness variation, method for making and apparatus therefor

-50. (canceled)

A method of making a glass article, comprising:

• flowing molten glass into a trough of a forming body, the molten glass overflowing the trough and descending along opposing forming surfaces of the forming body as separate flows of molten glass that join below a bottom edge of the forming body;
• drawing a ribbon of the molten glass from the bottom edge in a draw direction;
• cooling the ribbon with a cooling apparatus comprising a thermal plate extending in a width direction of the glass ribbon orthogonal to the draw direction, the cooling apparatus further comprising a plurality of cooling tubes positioned within the cooling apparatus, each cooling tube of the plurality of cooling tubes comprising a first tube with a closed end adjacent the thermal plate and a second tube extending into the first tube with an open end spaced apart from the closed end of the first tube, the cooling comprising flowing a cooling fluid into the second tubes of the plurality of cooling tubes, the cooling further comprising forming a plurality of thickness perturbations on the ribbon corresponding to a location of each cooling tube, each thickness perturbation comprising a characteristic width equal to or less than about 225 mm.

-55. (canceled)

An apparatus for making a glass ribbon, comprising:

• a forming body comprising a trough configured to receive a flow of molten glass and converging forming surfaces that join along a bottom edge of the forming body from which a glass ribbon is drawn in a draw direction along a vertical draw plane;
• a cooling apparatus positioned below the bottom edge comprising a thermal plate extending in a width direction of the flow of molten glass and a plurality of cooling tubes positioned within the cooling apparatus, each cooling tube of the plurality of cooling tubes comprising a first tube with a closed end adjacent the thermal plate and a second tube extending into the first tube with an open end adjacent the closed end of the first tube.

-64. (canceled)