公开(公告)号：US3764285A

公开(公告)日：1973-10-09

申请号：US3764285D

申请日：1972-06-09

Applicant: PPG INDUSTRIES INC

Inventor： MATESA J ,  FARABAUGH A

IPC: C03B18/02 ,  C03B18/04 ,  G01B11/04 ,  G01D5/34 ,  G05D3/12 ,  G05D5/06

CPC classification number: G01B11/046 ,  C03B18/04 ,  G01D5/341 ,  G05D5/06

Abstract: In the manufacture of float glass, the width of the glass formed in controlled by detaching the width of the ribbon after it is substantially cooled and attenuated, and employing the error of the detected width from the target width to control the target width of the ribbon at a point upstream in the process where the ribbon is hot and acting as a viscous liquid, by detecting the width of the ribbon at the upstream point and employing the error that detected width from its target width to control the target position of a tweel or gate controlling the flow of molten glass in the float bath and controlling the tweel to ultimately control final ribbon width in a stable manner.