. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Tenoning Machine Made in 1856. same speed, and this belt is provided with a self-operat- ing weighted tightener having vertical and horizontal adjustment. This machine is provided with a combination roller table, greatly facilitating the work both in ease of opera- tion and quantity turned out. In this device the top part of the table travels farther in a given time than the under part, not requiring the extra long ways. The table is secured to ways with safety g
. Canadian forest industries 1894-1896. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Tenoning Machine Made in 1856. same speed, and this belt is provided with a self-operat- ing weighted tightener having vertical and horizontal adjustment. This machine is provided with a combination roller table, greatly facilitating the work both in ease of opera- tion and quantity turned out. In this device the top part of the table travels farther in a given time than the under part, not requiring the extra long ways. The table is secured to ways with safety gibs and stops, so it can not be thrown from the ways or into the knives. of the bed and produces an unnecessary pressure upon it, but in no case will the pressure of the top rolls be sufficient even upon the softest lumber to sink the bottom ones into the lumber one-eighth of an inch, or even a small portion of it. The careful operator, however, who is a close obser/er, can always judge from the working of the machine whether the pressure upon the bed is sufficient to cause extra wear and friction, and regulate them accordingly. As a rule, the sinking into the lumber by the bottom Tenoning Machine, 1895. der will not sink into it, there is no necessity of elevat- ing the back rolls, but they should be set level with the bed. Another point has been frequently referred to, is the amount of allowance for jointing upon the side next to the long guide. Where the groove is run upon this side, it is very important that sufficient margin be allow- ed for jointing, but the extra amount cannot be governed by any fixed rule, but must be determined by the condi- tion of the lumber, and the good judgment of the oper- ator, and there is no question but a large amount is wasted in some mills by setting the long guide too far back of the stationary matcher head. Where the man at the saw, whether it be a single or double edger, is particular in straightening the stuff, that is to avoid short cr
Size: 2060px × 1213px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
