Dept. Bull. 1500, U. S. Dept. of Agriculture 
Plate 6 
Two Types of Commercial Gluing Operations 
A.— Panel-building operation. This crew is building up simultaneously three stacks of panels 
from the one spreader. The peripheral speed of spreader rolls is about 150 feet per minute. One 
stack of panels goes to the press on an average of every two minutes. 
B.— Grand-piano rim-gluing operation. The glue-coated layers of veneer are clamped securely 
around a central form by means of a series of hand screws bearing on thick cauls. The rims are 
left in the form until the glue has set. 
