Glass forming apparatuses having injection and extraction ports and methods of cooling glass using the same

A glass forming apparatus, comprising:

• a forming body defining a draw plane that extends in a draw direction;
• an actively cooled thermal sink positioned in the draw direction from the forming body;
• and
• a transition housing wall positioned in the draw direction from the forming body such that the actively cooled thermal sink is positioned between the transition housing wall and the draw plane, the transition housing wall comprising:
• an extraction port positioned in the draw direction from the actively cooled thermal sink;
• and
• an injection port positioned in the draw direction from the actively cooled thermal sink.

A method of forming a glass ribbon, comprising:

• drawing the glass ribbon from a forming body in a draw direction between thickness control members;
• cooling the glass ribbon;
• and
• stabilizing an eddy of airflow that circulates in a partially enclosed region formed by the thickness control members and a baffle positioned in the draw direction from the thickness control members by extracting air from the partially enclosed region and injecting air into the partially enclosed region, wherein the air injected into the partially enclosed region is at a temperature greater than a temperature of the air extracted from the partially enclosed region.