Abstract: In a glass-ribbon conveyance assisting device which is applied to a glass-ribbon conveyance device configured to convey a glass ribbon on a plurality of rotating glass-conveyance rolls, the glass-ribbon conveyance assisting device includes a rotary drive section, a plurality of rolls configured to be rotated by the rotary drive section, an annular belt configured to rotate while running with flexion under a state where the rolls have been inserted into the belt, and a wheel configured to press the glass ribbon which is conveyed on the belt. The glass ribbon is conveyed on the belt by a drive of the belt under a state where width-directional both end portions of the glass ribbon are sandwiched between the belt and the wheel.

Abstract: When a glass substrate for a liquid crystal display is manufactured using the downdraw method. strain caused by differences in the tempsrature of the sheet glass achieved as a result of cooling are reduced. Furth rtore. minute strain that occurs when the sheet glass manufactured using the downdraw method is out into smaller pieces is inhibited. When the sheet glass 8 is manufactured using the downdraw method. a temperature distribution is formed in the widthwise direction of the sheet glass 8 by the heat treating unit 9 used in the slowly cooling process after molding. This temperature distribution is a distribution that can offset the temperature distribution in the sheet glass 8 caused by the fact that the thickness of the sheet glass 8 after molding is greater in the edge areas than that in the surface area.

Abstract: An edge roll machine for contacting a marginal portion of a body of glass being formed into a continuous sheet of glass while floating on molten metal is provided with a glass-engaging edge roll having an internal fluid coolant distributor having spiral vanes to direct the coolant against the surface the periphery of the roll in order to provide gripping contact with molten glass while avoiding sticking of the roll to the glass.

Abstract: A sheet of molten glass issuing from an overflow channel is supplied to the molten metal bath used in the formation of float glass. The overflow channel is positioned adjacent one end of such bath transversely of the longitudinal extent thereof, and the overflow channel is fed at one end thereof with homogeneous glass which has been thoroughly stirred and homogenized within a forehearth immediately adjacent the inlet end of such overflow channel, so that the resulting sheet may be attenuated without detrimental surface streak or ridges due to internal striae or cord which detrimentally affect the optical quality of the sheet.