Improvements in Apparatus for Cutting up Wood into Discs for use in Making Wood Pulp.
Year: 1889

page_text: Date of Application, 16th Sept., 1889
Complete Specification Left, 15th Apr., 1890-Accepted, 5th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Cutting up Wood into Discs for use
in Making Wood Pulp.
I, HEINRICH WIGGER of Unna in the province of Westfalia, Germany Mechanica!
Engineer, do hereby declare the nature of this invention to be as follows:-
For making wood pulp according to the system of Mitscherlich the wood having
been peeled off its bark is cut in discs of 1 to 2 inch thick by means of saws.
Preparing the wood in this manner requires much power, labour and wages and
causes besides a very great quantity of saw dust which are at least troublesome for
making good and clean pulp.
The wood chopping or wood cutting machines hitherto in use are not fit for cutting
such thick discs up to 2 inches.
I have therefore designed the cutting apparatus shown on the annexed drawing by
means of which it is possible to cut with a rotary cutter disc discs of wood of 1 inch
and more in thickness.
Fig. 1 is a front view of the disc with cutter and holding strap;
Fig. 2 is a vertical section
;
Fig. 3 is a back view of the cutter disc;
Fig. 4 is a horizontal section;
Fig. 5 is a vertical view of the feed bracket;
Fig. 6 is a plan of the same.
The arrangement consists of the knife A, the holding strap B and of the cutter disc
constructed so as to correspond to these pieces.
The knife is screwed fast on to the frame of the holding strap B which surrounds
by its closed boss at one side the fixing nut C of the shaft D of the cutter disc and is
held to the cutter disc by screws.
In order to stiffen the knife completely screws s¹, s², s3 are arranged at the other
end of the holding strap in such a manner that the strap can be pulled fast in
the direction of the arrows shown (fig. 1) and thus with it also the knife.
It is not necessary to adjust the knife for wear and tear; instead of this the cutting
opening mn is regulated on the one side by adjusting the forked piece E and on the
other side by turning the frame of the holding strap B on the shaft of the cutter disc
in the direction of the arrows, fig. 3.
Slotted holes are therefore provided in the cutter disc for the fastening screws
allowing play in the direction of the arrows.
In order to obtain a smooth cutting surface of the discs and to require as little
power as possible for cutting I arrange the feeding block G (fig. 5 & 6) in such a
position with regard to the surface of the cutter disc that it stands in an oblique
direction to the latter, both as regards the horizontal plane and as regards the
vertical plane of the same, that is to say that it stands obliquely to it in both
directions and is inclined to it both ways at an angle of 45 degrees as shown by
figs. 4, 5 & 6.
Dated this 10th day of September 1889.
KARL T. MAYER,
Agent for H. Wigger.

page_text: "" 6 is a plan of the same.
The arrangement consists of a knife A, the holding strap B and of the cutter
disc H having a smooth surface in front to which the said pieces A and B are fixed
in a suitable manner.
The knife A is screwed fast to the holding strap B which surrounds, by its closed
boss at one side of it, the fixing nut C of the shaft D of the cutter disc and is held to
the cutter disc by screws S.
In order to stiffen the knife completely screws s¹, s2, s³ are arranged at the other
end of the holding strap in such a manner that the strap can be pulled fast in the
direction of the arrows shown in fig. 1, and thus the knife is also pulled fast.
It is not necessary to adjust the knife for wear and tear; instead of this the cutting
opening m n is regulated on the one side by adjusting the forked piece E and on the
other side by turning the frame of the holding strap B on the shaft of the cutter disc
in the direction of the arrows fig. 3.
Slotted holes are therefore provided in the cutter disc for the fastening screws
allowing play in the direction of the arrows.
In order to obtain a smooth cutting surface of the wood discs and to require as little
power as possible for cutting, I arrange the feeding block G (figs. 5 & 6) in such a
position with regard to the surface of the cutter disc, that it stands in an oblique
direction to the latter, both, as regards the horizontal plane and as regards the
vertical plane of the same, that is to say that it stands obliquely to it in both
directions and is inclined to it both ways at an angle of 45 degrees as shown by
figs. 2, 4, 5 & 6.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
A cutting apparatus with a rotary cutter disc, consisting of the knife A, being held
fast to the disc, the adjustable holding strap B and the fastening screws s¹, s, in
combination with the forked piece E and the feeding block G being placed obliquely
to the disc in both directions.
D
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A 1 1900