DE1627156A1 - Circular saw blade, especially for sawing bones, fine fiber wood, plastic and non-ferrous metals, with teeth spaced around the circumference - Google Patents

Description

Andrejewski & Honke Patent Attorneys ■.> ■

Physicist

Dr, Walter Andrejewski

. Graduate engineer

Acts of Art: 29 725 / Jn-s Dr-Ing. Manfred Honke

■ Essen, September 8, 1969 V Kettwiger Strasse 36

Patent application
Wilhelm Blättler,
Hohlstrasse 4ol,,

8048 Zurich - Switzerland -

"Circular saw blade, in particular for sawing bones, fine fiber wood , plastic and non-ferrous metals, with teeth ^{11 spaced around the circumference}

Circular saw blades, especially for sawing bones, are known. Above all, such 'KfeissägeiDl Blätter are used in connection with; associated saws in Metzgerelen and in particular Large slaughterhouses Use »The well-known circular saw blades have extensive pointed teeth connected to each other * That is a disadvantage. In particular, there is such a

Patent attorneys Dr. W. Andrejewski, Dr. M. Honke, 43 Essen, Keitwiger Strasse 36

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Not building up the ability to drain away the bone meal in the required manner. Bone meal on the one hand and fat and meat fibers on the other hand therefore form a lubricant, which the cutting process. and leads to high wear of the cutting edges on the teeth. In addition, the operation of "saws with these known circular saw blades is associated with considerable effort" - Furthermore, circular saw blades are known with saw teeth arranged at a distance from one another, in which the individual saw teeth have relatively wide recesses from 10 to 20 mm wide are connected to each other ^. Otherwise, the teeth are designed as saw teeth. The coarse teeth achieved in this way make it practically impossible to saw through small bones, such as the rib bones of pigs or other small animals, in the required manner, since the coarse teeth lead to the bones tearing open and splintering the cutting edges have the required sharpness. Even after a short period of use, a splintering can be observed even with thicker bones. In this embodiment, too, the wear and tear of the cutting edges is considerable, so that regrinding of the teeth is necessary at short time intervals. ■ ^r: ■ "

The invention is based on the object of creating a circular saw blade, in particular for sawing bones, which is characterized on the one hand by a long service life and a clean cut and, on the other hand, enables the associated ^D Sage to be operated with particularly little effort . '^{; :} '' ^Ίί: \

Patent attorneys Dr. W. Andrejewski, Dr, M. Honke, 43 Essen / Kettwiger Strasse 36

The invention relates to a circular saw blade, in particular for sawing bones, fine fiber wood. Plastic and non-ferrous metals etc. » with saw teeth spaced around the circumference. The invention consists in that the depth; one in front of each tooth., from the circumference of the saw blade body inwardly extending slot 3 to 15 mm, the slot width 1 to 5 xm and the stroke height of the tooth on the circumference of the saw blade 0.3 to H- mm, the slot in front of the Tooth in relation to a - through the associated radial plane: in. This ^ or at an angle - left or right to this, tangential inwardly Slot width 1 to 2 mm and the stroke height of the tooth Ö, 3 to ^ mm measures. A particularly advantageous removal of chips or bone meal and the like means that the "slot depth" of the slot is kept short; the latter opens into a recess in the saw blade body.

The. The advantages achieved by the invention are above _all: First of all, that on the one hand: -On the basis of the measures claimed, hacking of the saw blade is avoided and, in particular, for a quick removal of the chips or bone meal or the like which does not hinder the sawing process Care is taken. In particular, the formation of a smear from JCnc-ehenmehl and fat when spreading bones and the like, which can be observed in the known forms of embodiment, is practically completely eliminated with the subject of the application. Furthermore, the structure claimed by the invention leads to a significantly longer service life, which is a multiple of that required in the known embodiments.

Patent attorneys Dr. W. Andrejewski, Dr. M. Honke, 43 Essen, Kettwiger Strasse

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represent sufficient service life. In addition, the associated saw can be operated without any special effort.

In the following the invention is based on only one embodiment illustrative drawing explained in more detail; show it:

1-3 circular saw blades according to the invention,

Fig. 4 + 5 for a better understanding, two known saw blades, one with fine serration and the other is provided with coarse teeth and interposed recesses,

Fig. 6, seen from the front side, a prism toothing for the embodiment according to Figures 1-3

The first embodiment according to FIG. 1 shows on the circumference Saw teeth 2 arranged at a distance from one another, in front of which narrow, from the circumference 1 inward in the circular saw blade 3 obliquely running slots 4 run backwards or forwards tangentially from the direction of rotation of the circular saw blade 3, or also radially according to a radial plane laid through the associated tooth tip.

The slot width b measures 1 to 2 mm, the slot depth a away from the circumference 1 3 to 15 mm and the stroke height α of the tooth 2 from the circumference 1 o, 3 to 4 mm. With these dimensions of the tooth 2 and the very narrow slot 4, this circular saw blade 3 is suitable for sawing fine bones such as pig bones

009843/0624

Patent attorneys Dr. W. Andrejewski, Dr. M. Honke, 43 Essen, Kettwiger Strasse

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(Rib bones) and other small animals ".

For thicker bones, for example cattle bones (cane legs) etc., teeth 5 with slot widths b of 1 to 5 mm are provided according to FIG. In the case of wider slots 6, the slot depth a is ^{usually longer than L} narrower slots 4, but a maximum of 15 mm from the circumference, - .. ■■ ...

According to the third embodiment according to FIG. J5, "more or less wide slots 7 kept short, which open into any shaped widenings 8 / which the latter is the best possible Material outflow from the cut material through the slots 7 guarantee. In this or the other versions as described in "the teeth can be provided with a hard metal coating or improved by simple hardening of the tooth tips depending on the intended use of the circular saw blade Clippings. ■ "'" ""' "'

The described circular saw blade can be used depending on its use a good toothing, a cross toothing or "like Fig.5 shows, have a prismatic toothing 9, the latter in particular for high-speed machines use, whereby the prism shape the teeth are provided with armor (hard coating) will. As a result of the wedge-like formation of the .Zahnschneide 9 the application of the hard surface is made easier and brittle bone material and the like (cattle bones) better cut with very good material flow on both sides of the Prismatic tooth, two such prismatic teeth are also shown in Fig. 1, in which one of the direction of rotation of the Krelssäge

009043/0624

Patent attorneys Dr. W. Andrejewski, Dr. M. Honlce, 43 Essen, Kettwiger Strasse

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leaf facing seat position is indicated by dash-dotted lines.

Compared to the circular saw blade designs on the market according to Pig, 4. and 5, the following differ. proper constructions according to the Fig. Ibis> teeth in the arrangement of the saw, through precisely on the cut material. correct slot widths, b in front of the teeth and in compliance, an appropriate lifting height c of the teeth in the correct ratio. ·? ·. nis to the seat width b. . . ■ "■■■ - ..

With all three embodiments, thin and thick bones can be sawed many times faster with the lowest possible working pressure without any smearing and splintering, with the best possible sawdust flow through slots 4, 6 and 7 and possibly through the widenings 8 and as a result of the prism * · Toothing 9i The service life of the new circular saw blade is extended by three to five times as compared to the well-known circular saw blades due to the significantly lower tooth wear and tear. _{: In} addition, the Ka-ri r Schlne equipped with the new · circular saw blade (electric button saw or stationary saw) - is protected as much as possible.

In addition to bones, fiber wood, plastic, non-ferrous metal can be used etc. can be sawn.

Expectations

009843/0624

Claims (3)

1627158 patent attorneys. Dr. W. Andre jewski, Dr. M. Honke, 43 Essen, Kettwiger Strasse ■ ... claims 1) Circular saw blade, especially for sawing bones, fiber wood, Plastic and non-ferrous metals etc., with over the Circumference with spacings - saw teeth distributed from one another, characterized in that the depth (a) of a in front of each tooth, from the circumference of the saw blade body inward running slot (4,6,7) 5 to 15 mm, the slot width (b) 1 to 5 mm and the lifting height (c) of the tooth (2.5) from the circumference of the saw blade (1) 0.15 to 4 mm, with the slot (4,6,7) in front of the tooth (2,5) with respect to one by the associated Tooth tip placed radial plane in this, or angular lirics or to the right of this runs tangentially inwards » 2) circular saw blade according to claim 1, characterized in that the slot width (b) 1 to 2 mm for sawing thin bones and the stroke height (c) of the tooth (5) measures 0.3 to 4 mm. 3) circular saw blade according to claim 1, characterized in that the slot depth (a) of the slot (7) is kept short and the latter opens into a recess (8) in the saw blade body. PAe Dr Andrejewski, Dr Honke 009843/0624 Blank page