Glass, paints, varnishes and brushes: their history, manufacture, and use (1923)
Pittsburgh Plate Glass Company · Pittsburgh Plate Glass Company · leaf 197
apparent effort achieves are displaced by compressed air apparatus prodigies of result. that is able to blow strongly and without Invention is largely a means for multiplying stopping, until the lump of melted glass swells human powers. Our telephone ears are able to to towering proportions.… … Flattening Oven Lifting to Lehr When the glass is sufficiently flattened out it is lifted from the iron From the flattening compartment the sheet of glass is moved to a carriage in the heating oven, transferred to a flattening stone of cooler one and then to the lehr, or annealing oven, where it is…
