Patent ID: 8065892

Claim:
A device for manufacturing sheet glass constituted such that the sheet glass is continuously formed by continuously directing molten glass flowing out of a melting furnace through a supplying tube to a forming vessel in a forming furnace, wherein the supplying tube includes a small diameter tube portion, which extends in a vertical direction and has a small flow passage area, provided at an upstream side, a large diameter tube portion, which has a large flow passage area, provided at a downstream side, the large diameter tube portion having an upstream end portion extending in the vertical direction, a downstream end portion extending in a horizontal direction, and an intermediate portion transitioning from the vertical direction to the horizontal direction, and an expanded diameter tube portion, which has a gradually expanding flow passage area toward the downstream side, interposed between the small diameter tube portion and the large diameter tube portion, and wherein the small diameter tube portion, the expanded diameter tube portion, and the large diameter tube portion are integrally and continuously connected to one another.