Box Boards from Waste 41 



factory can work up a great deal of such material and thus save 

 it from becoming a total loss. Slabs are a perennial problem 

 at the sawmill. By installing a slab resaw and cutting them into 

 short boards for the box factory the waste from this source 

 can be greatly lessened. 



The manufacture of box boards requires extra floor space and 

 special machinery. The shop can best be arranged in connection 

 with the planing mill rather than the sawmill itself. If the plant 

 is large, the box factory can be made a separate unit of man- 

 agement. At smaller plants its management can be incorporated 

 with that of the planing mill. The main machinery in a box 

 factory consists of rip-saws, cut-off saws, planing machines and 

 resaws. Nailing machines, splicers, matchers, equalizers and many 

 other special machines are used for various kinds of work, but 

 are not essential in a factory using mill waste. A twin-band resaw, 

 however, might be useful if trimmings from timbers and dimen- 

 sion stock are abundant. The planers must be specially designed 

 for the work and should be wide gauge short-bed machines capa- 

 ble of running large numbers of short irregular pieces at high 

 speed. Any standard resaw such as intended for planing mill 

 or box factory use should be satisfactory. There are numerous 

 types of cut-off and rip-saws designed for box factory use. Hand- 

 feed rip-saws are probably more satisfactory for box factories 

 using waste than are power-feed machines. 



A good arrangement and combination of machines would seem 

 to be the following: 1 band resaw, in front of 3 planers, then 

 2 more resaws, all followed by 6 cut-off saws arranged in a line 

 at right angles to the resaws and planers, and then 7 rip-saws 

 in a line at right angles to the cut-offs. Special machinery is 

 usually placed beyond the rip-saws. (It is generally well to 

 provide storage room both for waste and for completed shooks.) 



Such a factory should be able to turn out from 50,000 to 80,000 

 feet of shooks a day, and to utilize waste from a mill of from 

 200,000 to 300,000 feet capacity. For a mill of from 50,000 to 

 100,000 feet daily capacity, a resaw, a planer, 2 cut-off and 3 

 rip-saws should be ample. The resaw could, perhaps, be used 

 jointly with the planing mill, since it would generally be less in 

 use in the box factory alone than the planer. Smaller mills can 

 sometimes resaw slabs and planing mill culls and sell them to 

 box factories to be worked into shooks. 



