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CHAPTER IV

MACHINE CYLINDER
DEVELOPMENTS

ABOUT 1896 J. H. Lubbers, a window glass flattener by trade, began experimenting on a machine wherein the air was mechanically introduced into the blowpipe while the pipe was raised on guides during the formation of the cylinder. The process looked very simple but it took years of effort and several million dollars to bring this machine cylinder process to the point where it is today.
    While this method is a step in advance of the hand process, as it eliminates the arduous work of the gatherer, the blower and the snapper, makes better and cheaper glass and produces larger sheets, the product is still