The bottom surface of the timber passes over the bed plate u, [Fig. 3185], which raises and lowers with the lower feed rolls, being connected by the screw i, [Fig. 3184], to the bearing box of feed roll 6.
All the lower feed rolls are operated simultaneously by means of the rod l, having for each lower feed roll a worm, driving a worm wheel l′ on a screw threaded into a hub m in each feed roll bearing; the crank for operating l is seen at p, [Fig. 3183].
The passage of the timber through the machine is continued in [Fig. 3185], in which it is seen that after the lower surface of the timber has been planed it passes from the cutter head k′ to a bed plate v and is thus supported by a flat and true surface while the side cutter heads plane the two sides, one of these side heads being shown at h. The side heads are carried in hangers, one of which is shown at p′. It is gibbed to the under cutter frame u′ by the sliding gib x, the left hand head h being moved across the frame by the screw f′. The hanger is held at the bottom by the gib t and the cross tie t′. p is the pulley for the side head h, the end wear of whose shaft is taken up by the adjusting screw s′, r′ being a leather washer, and r the end of the shaft.
Fig. 3186.
The top box h′ moves across the machine in the slideway b′′, [Fig. 3186], a′′ being a part of the box h′.
Upon leaving the side heads the timber will have been planed on three sides and the side surfaces dressed to a right angle with the bottom surface.
It is then guided to the upper cylinder as follows:
The friction rolls k, k are to relieve the bed a′′ from the pressure due to the feed roll z′ and the roll j′, which holds the timber after it has left the cutter i′, and thus prevents it from vibrating. After leaving the pressure roll j′, the timber passes under the scraper d′, [Fig. 3183], and thence to the delivery roll 7, which is held down by the weight l, in connection with the lever l′.