Remove the
door-light frame

Cutting first side of
glass to contour

Both sides cut and ready
to remove from frame

Waste edges have
been cut free

Smoothing the edges
of finished glass

Setting glass securely
in the channel

    Automobile glass replacement involves removing the frames of windshields, body lights or door lights and installation of the glass in the channel frames of the car windows. Skilled installation men provided with glass cut to size, the necessary setting materials such as channel shapes, felt strips, everseal tape, and hammer, screw driver, pliers, etc., can install automobile glass with a minimum of difficulty and little loss of time.

    Many of the requirements of window glazing apply to the setting of auto glass parts, but the observance of some special precautions will help to insure satisfaction to customers and to avoid recurrence of breakage and additional expense.

    Frames or channels must be straight. A slight bend is often sufficient to crack the glass.

    A rubber mallet should be used for forcing the glass safely and easily into the channel. Sharp or hard tools are dangerous and their use for installing glass should always be avoided.

    Glass parts should be set firmly in the frame or channel, with a good grade of cork and rubber fabric or other approved packing material.

    If the side run of channel on body lights is worn out, new channels should be installed.

    All broken glass and fabric must be removed from the frame or channel before starting to make the replacement.

When car has been in a wreck, or the door frame has become sprung, the opening should be checked. A paper pattern of the glass part desired should be made, since the original factory part may not fit the opening. Ascertain that the channel will receive the glass without strain.

After installation, raise and lower the glass part in channel to determine that the glass moves freely and does not rattle.

Source:
PPG Glass Manual
1946