Wood chip shaver

A wood chip shaver, consisting of cutting blades disposed on a circle and of a rotor rotating therewithin and carrying on its circumference vane-shaped chip guide members immediately adjacent to the blades, the members guide and press the chips against the blades. In front of the vane of the chip guide member is provided a guide surface approaching the blades in wedge-shape fashion in the travelling direction of the chips, the chips being carried in between the surface and the blades. With the aid the invention the chips are guided to enter between the chip guide members and the blades, whereby leaf-like chips such as are desired are obtained.

The present invention concerns a wood chip shaver consisting of cutting 
blades disposed in a ring and of a rotor rotating therewithin and carrying 
on its circumference vane-shaped chip guide members immediately adjacent 
to the blades, said members guiding and urging the chips against the 
blades. 
Chip shavers of this type known in the art present the drawback that the 
chips tend to roll and bounce in front of the chip guide member, and the 
desired leaf-type shavings are not obtained. The centrifugal force of the 
rotor is not sufficient to cause the chips to be urged with force against 
the blades. 
The object of the present invention is to eliminate the drawbacks mentioned 
above. The shaver of the invention is characterized in that before the 
vane of the chip guide member is disposed a guide surface, approaching the 
blades in the travelling direction of the chips in wedge fashion, the 
chips being carried in between this surface and the blades. By the aid of 
the invention, the chips which have entered the chip guide member cannot 
roll and bounce and they are instead better and better directed in between 
the guiding surface of the chip guide member and the blades, whereby the 
desired leaf-type chips are produced. The chips are guided to lie on their 
flat sides, whereby shavings parallel to the grain are obtained as 
desired. Experiments have shown that the power drawn by the machine is 
indeed expended towards cutting the wood chips, seeing that the quantity 
that is cut substantially exceeds that of any means known in the art. 
An advantageous embodiment of the invention is characterized in that the 
chip guide member is inclined forward, that is in the travelling 
direction, so that the chips are directed in the tapering direction of the 
wedge. Thus, the chips are even better and more positively directed in 
between the chip guide member and the blades. 
Another embodiment of the invention is characterized in that the chip guide 
members have been divided into two or more consecutive wedge-shaped guide 
surfaces. Therefore, the chips are even more uniformly distributed in the 
space between the chip guide members and the blades. 
A third embodiment of the invention is further characterized in that the 
wedge-shaped guide surfaces are stepwise off-set in the different chip 
guide members. The cutting forces acting on the blades are in this manner 
distributed very uniformly on all blades, whereby also the wear of the 
blades is uniform.

The shaver consists of cutting blades 1 disposed in ring form and a rotor 2 
rotating therewithin and carrying on its circumference chip guide members 
3, which guide and urge the chips against the blades 1. In front of the 
vane 4 of the chip guide member 3 is placed a wedge-shaped guide surface 
5, inclined toward the blades in the direction of travel of the chips, the 
chips being directed in between this surface of the blades. The chip guide 
member 3 is inclined forward, that is in the travelling direction. The 
travelling direction, i.e., the direction of rotation of the rotor 2 is 
shown with an arrow 6. The chips enter the shaver through the inlet 8 and 
are directed along with the guide plate 9 on top of the rotor 2, in 
between the chip guide members 3 and the blades 1. As the chips become 
wedged between the chip guide members 3 and the blades 1, leaf-type chips 
such as are desired will be cut from them and these will exit through the 
exit aperture 10. 
The chip guide member 3 of FIG. 3 is provided with a plurality of chip 
guide surfaces 11,12,13,14 and 15. The chips are thus more uniformly 
distributed in the space between the chip guide members 3 and the blades 
1. 
It is obvious to a person skilled in the art that various embodiments of 
the invention may vary within the scope of the claims stated below.