Patent ID: 9452945
Filing Date: 2016-09-27
CPC Classification: C03B,Y02P

Claim Text:
1. An apparatus for making a glass sheet comprising: (a) a forming body comprising a trough-shaped part over a wedge-shaped part, the trough-shaped part having a first trough side wall and a second trough side wall over a trough bottom surface defining an open channel having an open end, the open channel having a center plane, the first trough side wall having a first internal trough surface, a first trough top surface and a first external trough side surface, the second trough side wall having a second internal trough surface, a second trough top surface and a second external trough side surface, the wedge-shaped part having a first wedge side surface connecting with the first external trough side surface and a second wedge side surface connecting with the second external trough side surface, the first and second wedge side surfaces sloping downwardly to join at a root line; and (b) a tube defining a closed channel connecting with the open channel of the trough-shaped part through the open end of the open channel, the tube comprising: (b1) a first part, which is a closed channel, and (b2) a second part, which is a transition closed channel, said second part fittingly connecting the first part with the open channel of the trough-shaped part; wherein: said first part has a first part cross-section in a plane perpendicular to the center plane of the open channel, said first part cross-section (i) having a center and (ii) being located at the end of the first part where the first part connects with the second part; the open end of the open channel has an open end cross-section which has a bottom line; the distance from the center of said first part cross-section to a plane which is perpendicular to the gravity vector and contains said bottom line is DT1; the distance from the first trough top surface at the open end of the open channel to said plane which is perpendicular to the gravity vector and contains said bottom line is DT2; and DT1/DT2≧0.50.