passes over the bending roll-- between the flattening table and a series
of grip bars running in the same direction and placed just above the
The lehr is provided with two hundred power driven
rolls, covered with asbestos composition, over which the glass passes in
continuous sheet form, emerging at the end onto a movable cutting table.
Here it is cut into sheets of suitable size, dipped in a hot solution of
hydrochloric acid and then distributed to the several cutting stalls.
Experienced cutters then carefully select sheets, grade them and cut
them into commercial sizes. These are packed with straw in boxes each
containing fifty square feet of glass, regardless of the size of the
Sheet glass made by this process is absolutely
flat, of uniform thickness, and is free from the distortions so common
and annoying in all glass made by either the hand process or the cylinder
machine process. It thus reaches