Libbey-Owens process

In the Libbey-Owens or Colburn-Libbey-Owens process the drawn glass sheet is bent through 90°, 1 m above the surface of the bath, on a polished chrome-ruckel alloy roll there is no debiteuse. The glass then travels into a horizontal lehr for annealing. 

By the nfid 1900s these three processes were responsible for the world s entire production of flat glass, with 12% being made by the Fourcault process, 20% by the Colburn-Libbey-Owens process, and 8% by the Pittsburgh process. These processes have now been replaced almost entirely by the float process. 

Colburn Process. The production of sheet glass by vertical drawing for about 4 ft and then bending over a driven roller so that the cooling sheet then travels horizontally. The process was invented in USA by I. W. Colburn in 1905 and was subsequently perfected by the Libbey-Owens Company. 

Loading. Choking of the pores in the face of an abrasive wheel with debris from the workpiece that is being ground. LOF-Colbum Process. (LOF = Libbey-Owens-Ford Glass Co. See under... 

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