DE819513C - Knife disc for pencil sharpening machines - Google Patents
Knife disc for pencil sharpening machinesInfo
- Publication number
- DE819513C DE819513C DEP50796A DEP0050796A DE819513C DE 819513 C DE819513 C DE 819513C DE P50796 A DEP50796 A DE P50796A DE P0050796 A DEP0050796 A DE P0050796A DE 819513 C DE819513 C DE 819513C
- Authority
- DE
- Germany
- Prior art keywords
- knife
- pencil sharpening
- knife disc
- sharpening machines
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L23/00—Sharpeners for pencils or leads
- B43L23/008—Sharpeners for pencils or leads with rotating cutting bodies
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Außer Schneidwalzen gibt es an Bleistiftspitzmaschinen bereits Messerscheiben, die den Nachteil haben, daß sie ein nur geringes Nachschärfen ermöglichen, weil die bisher bekanntgewordenen Herstellungsverfahren solcher Messerscheiben eine genügend tiefe Hinterfräsung mit richtigem Schnittwinkel mir unvollkommen gestatten. Da das wiederholte Nachschärfen der Messerscheiben eine veränderliche Schnittiefe bedingt, muß für eine genügende Ausladung der im richtigen Winkel angestellten Messerschneiden aus der Scheibenebene heraus und für einen einwandfreien Ausstoß der'Holzspäne gesorgt sein. , Die Erfindung wird diesen Anforderungen dadurch gerecht, daß die Messerscheibe in spanloser Verformung hergestellt ist und die um ein gehöriges Maß aus der Scheibenebene heraus verformten Messerschneiden tangential zu einem gedachten, die innen gelegenen Messerenden begrenzenden Kreisbogen verlaufen, auf dem sich zum Abfließen der Bleistiftspäne Öffnungen befinden, durch welche die Späne beim Drehen der Messerscheibe mittels eines am Maschinengehäuse befindlichen Abstreifers nach außen befördert werden.In addition to cutting rollers, there are already knife disks on pencil sharpening machines, which have the disadvantage that they allow only a slight resharpening because the previously known manufacturing process of such knife discs is sufficient Allow me imperfectly deep back milling with the correct cutting angle. Since that Repeated resharpening of the knife disks results in a variable cutting depth, must for a sufficient projection of the knife edges set at the correct angle out of the plane of the pane and ensures that the wood chips are properly ejected be. , The invention meets these requirements in that the knife disc is made in non-cutting deformation and which by a reasonable amount from the plane of the disk deformed knife edges tangential to an imaginary one, the inner one The ends of the knife are bounding a circular arc on which the pencil shavings can drain Openings are through which the chips when turning the knife disc by means of a scraper located on the machine housing can be conveyed to the outside.
Die Messerscheibe ist auf der Zeichnung an einem Ausführungsbeispiel dargestellt, und zwar zeigt Abb. i die Scheibe in Ansicht, Abb. 2 einen vergrößerten Teilquerschnitt A-B, und Abb. 3 die auf ihrer Antriebswelle gelagerte Messerscheibe im Querschnitt. Mit ia ist die Bohrung dargestellt, mittels welcher die Messerscheibe i auf die Drehwelle 2 aufgesteckt ist (s. Abb. 3). Konzentrisch um die Bohrung ia herum ist die Messerscheibe i mit Löchern i6 versehen. Die Messerschneiden ic verlaufen tangential zu dem gedachten Kreisbogen id und sind in spanloser Verformung um ein gehöriges Maß ie (s. Abb. 2) aus der Ebene der Scheibe i herausgebogen, so daß die Messer wiederholt nachgeschliffen werden können. Durch die Löcher i6 gelangen beim Spitzen eines Bleistiftes 3 die Holzspäne nach außen, wobei ein am Maschinengehäuse befestigter Abstreifer .4 ein Stauen der Späne in der sich an ihm vorbeidrehenden Scheibe verhindert.The cutting disc is shown in the drawing using an exemplary embodiment shown, namely Fig. i shows the disk in view, Fig. 2 an enlarged Partial cross-section A-B, and Fig. 3 the cutter disk mounted on its drive shaft in cross section. With ia the bore is shown, by means of which the knife disc i is attached to the rotating shaft 2 (see Fig. 3). Concentric around the hole ia around the knife disk i is provided with holes i6. The knife edges ic run tangential to the imaginary circular arc id and are in non-cutting deformation around a appropriate measure ie (see Fig. 2) bent out of the plane of the disk i so that the Knives can be sharpened repeatedly. Through the holes i6 get at Point a pencil 3 the wood shavings outwards, one on the machine housing attached scraper .4 a build-up of the chips in the rotating past it Disc prevented.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP50796A DE819513C (en) | 1949-08-03 | 1949-08-03 | Knife disc for pencil sharpening machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP50796A DE819513C (en) | 1949-08-03 | 1949-08-03 | Knife disc for pencil sharpening machines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE819513C true DE819513C (en) | 1951-10-31 |
Family
ID=7384647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP50796A Expired DE819513C (en) | 1949-08-03 | 1949-08-03 | Knife disc for pencil sharpening machines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE819513C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2893352A (en) * | 1958-07-28 | 1959-07-07 | Larry Atiyeh | Pencil sharpener |
DE1272173B (en) * | 1962-08-08 | 1968-07-04 | Ardis S P A | Lead sharpener for conical sharpening of pencil leads held in a lead holder |
-
1949
- 1949-08-03 DE DEP50796A patent/DE819513C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2893352A (en) * | 1958-07-28 | 1959-07-07 | Larry Atiyeh | Pencil sharpener |
DE1272173B (en) * | 1962-08-08 | 1968-07-04 | Ardis S P A | Lead sharpener for conical sharpening of pencil leads held in a lead holder |
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