DE1757328B1 - Process for manufacturing grinding tools for refiners, defibrators or the like. - Google Patents
Process for manufacturing grinding tools for refiners, defibrators or the like.Info
- Publication number
- DE1757328B1 DE1757328B1 DE19681757328 DE1757328A DE1757328B1 DE 1757328 B1 DE1757328 B1 DE 1757328B1 DE 19681757328 DE19681757328 DE 19681757328 DE 1757328 A DE1757328 A DE 1757328A DE 1757328 B1 DE1757328 B1 DE 1757328B1
- Authority
- DE
- Germany
- Prior art keywords
- grinding tools
- grooves
- plastic
- filler material
- defibrators
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/12—Shape or construction of discs
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4981—Utilizing transitory attached element or associated separate material
- Y10T29/49812—Temporary protective coating, impregnation, or cast layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4998—Combined manufacture including applying or shaping of fluent material
- Y10T29/49993—Filling of opening
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Paper (AREA)
- Crushing And Grinding (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Moulding By Coating Moulds (AREA)
Description
Die Erfindung betrifft ein Verfahren zum Herstellen von Mahlwerkzeugen für Refiner, Defibratoren od. dgl. mit einem zylindrischen, kegeligen oder scheibenförmigen Werkzeugkörper und daran befestigten Messern, bei dem die zwischen den Messern befindlichen Nuten vom Nutgrund bis zu einer bestimmten Höhe mit einem Füllmaterial ausgefüllt werden.The invention relates to a method for producing grinding tools for refiners, defibrators od. The like. With a cylindrical, conical or disk-shaped tool body and attached to it Knives in which the grooves located between the knives extend from the bottom of the groove to one certain height can be filled with a filler material.
Es ist bekannt, die Standzeit von Mahlwerkzeugen von Reimern, Defibratoren, Mühlen, Entstippern und ähnlichen zum Aufbereiten von Zeil-, Holz- und Papierstoff dienenden Einrichtungen dadurch zu erhöhen, daß man die Messer dieser Mahlwerkzeuge gegenüber früheren Konstruktionen mit größerer Höhe ausführt. Dies hat allerdings zur Folge, daß der zu bearbeitende Stoff entlang den zwischen den Messern befindlichen tieferen Nuten durch die Maschine wandert, ohne ausreichend bearbeitet zu werden. Um einen gleich guten Mahleffekt zu erzielen wie bei den früheren Konstruktionen, füllt man die Nuten dieser Mahlwerkzeuge vom Nutgrund bis zu einer gewissen Höhe mit Holzleisten auf. Nach jfc entsprechender Abnützung der Messer entfernt man ® die Holzfüllung wieder und ersetzt sie durch eine JJjF andere mit geringerer Höhe oder arbeitet sie teilweise heraus. Auf diese Weise sind die Mahlwerkzeuge wieder verwendbar.It is known the service life of grinding tools from reimers, defibrators, mills, deflakers and similar devices for processing line, wood and paper pulp increase that you can use the knife of these grinding tools compared to previous designs with larger Height executes. However, this has the consequence that the fabric to be processed along the between the Knives located deeper grooves migrates through the machine without being adequately processed will. In order to achieve the same good grinding effect as with the earlier designs, one fills the grooves of these grinding tools from the bottom of the groove up to a certain height with wooden strips. According to jfc If the knives wear out, remove the wood filling and replace it with a JJjF others with a lower height or partially elaborates them. This is how the grinding tools are reusable.
Die Herstellung der Holzleisten zum Ausfüllen der Nuten solcher Mahlwerkzeuge verursacht jedoch hohe Kosten; denn insbesondere bei gegossenen, aber auch bei geschweißten Mahlwerkzeugen ist die Breite und die Tiefe der verschiedenen Nuten nicht genau gleich. Deshalb muß jeder Nut durch teuere Handarbeit ein besonderes Füllstück eingepaßt werden. Noch schwieriger ist das Herstellen der Füllstücke aus Holz bei Mahlwerkzeugen mit ungleich langen und ineinander übergehend ausgebildeten Nuten sowie insbesondere bei schräg zur Drehachse angeordneten Messern, z. B. von Kegelrennern; in letzterem Fall müssen die Füllstücke dem schraubenlinienartigen Verlauf der Nuten angepaßt sein.However, the manufacture of the wooden strips for filling the grooves of such grinding tools causes high costs; because especially with cast, but also with welded grinding tools, the width is and the depth of the various grooves are not exactly the same. Therefore every groove has to be done by expensive manual labor a special filler piece can be fitted. The production of the filler pieces is even more difficult made of wood for grinding tools with grooves of unequal length and merging into one another and especially in the case of knives arranged at an angle to the axis of rotation, e.g. B. of cone runners; in the latter In this case, the filler pieces must be adapted to the helical course of the grooves.
Aufgabe dieser Erfindung ist, ein Verfahren zum Herstellen von Mahlwerkzeugen für Refiner, Defibratoren od. dgl. anzugeben, welches die vorbeschriebenen Nachteile, insbesondere das bisher erforderliehe Anpassen des Füllmaterials an die Form der Nuten, vermeidet.The object of this invention is to provide a method for manufacturing grinding tools for refiners, defibrators od. The like. To indicate which the disadvantages described above, in particular the one previously required Adapting the filler material to the shape of the grooves, avoids.
Die Erfindung löst diese Aufgabe dadurch, daß bei dem eingangs beschriebenen Verfahren als Füllmaterial ein Kunststoff verwendet wird, der in zähflüssigem oder teigförmigem Zustand in die Nuten der Mahlwerkzeuge eingefüllt und danach zum Erhärten gebracht wird.The invention solves this problem in that, in the method described above, as a filler material a plastic is used, which is in a viscous or pasty state in the grooves the grinding tools is filled and then brought to harden.
Der Vorteil der Verwendung eines solchen Kunststoffes als Füllmaterial liegt darin, daß er auf einfache Weise durch Spachteln oder Spritzen in die Nuten eingefüllt werden kann, wobei man von unterschiedlichen Formen und Abmessungen der Nuten völlig unabhängig ist. Somit sind die Kosten für das Auffüllen der Nuten trotz höherer Materialkosten für den Kunststoff wesentlich niedriger als bei Anwendung von Holz.The advantage of using such a plastic as a filler material is that it is easy Way can be filled into the grooves by spatula or spraying, whereby one of different Shapes and dimensions of the grooves is completely independent. So the cost of that Filling the grooves in spite of the higher material costs for the plastic is significantly lower than when using it of wood.
Es hat sich als besonders vorteilhaft erwiesen, wenn der als Füllmaterial verwendete Kunststoff mit einem Trägerstoff, z.B. Talkum, vermischt ist. Auf diese Weise ist der Kunststoff noch besser geeignet, weil er einerseits zähflüssiger ist und somit aus schräg, senkrecht oder gar über Kopf stehenden Nuten nicht abläuft und weil er andererseits beim Aushärten in geringerem Maße schwindet.It has proven to be particularly advantageous if the plastic used as a filler material with mixed with a carrier such as talc. In this way, the plastic is even better suited because on the one hand it is more viscous and therefore consists of oblique, vertical or even upside down Grooves does not run off and because, on the other hand, it shrinks to a lesser extent during hardening.
Bei Versuchen sind besonders gute Ergebnisse erzielt worden bei Verwendung eines aus zwei Komponenten bestehenden chemikalienfesten Epoxydharzes. Mit gleichen Gewichtsteilen Talkum als Trägerstoff und mit einem Härter vermischt haftet der Kunststoff nach Einfüllen in die Nuten, z. B. eines Refiners, sehr gut am Nutgrund und an den Messern, insbesondere auch nach dem Aushärten, obwohl der Kunststoff hierbei noch in geringem Maße schwindet.Tests have given particularly good results when using one of two components existing chemical-resistant epoxy resin. With equal parts by weight of talc as a carrier and mixed with a hardener, the plastic adheres after filling into the grooves, e.g. B. a refiner, very good on the bottom of the groove and on the knives, especially after it has hardened, although the plastic this still shrinks to a small extent.
Ein weiterer Vorteil dieses Füllmaterials ist, daß nach entsprechender Abnutzung der Messer die Kunststoff-Füllung auf einfache Weise entfernt werden kann, da das Material infolge seiner Schlagempfindlichkeit leicht springt. Es ist aber auch möglich, die Kunststoff-Füllung durch Anwendung erhöhter Temperatur herauszuschmelzen. Danach wird auf die vorbeschriebene Weise eine neue Füllung geringerer Höhe eingebracht bzw. die Maschine bis zur völligen Abnutzung der Messer ohne Füllung betrieben. Another advantage of this filler material is that after appropriate wear and tear of the knife Plastic filling can be easily removed because the material is sensitive to impact jumps easily. But it is also possible to increase the plastic filling by using it Melt out temperature. Then a new filling is made smaller in the manner described above Height introduced or the machine operated without filling until the knives are completely worn out.
Im folgenden werden an Hand einer Zeichnung die nach dem erfindungsgemäßen Verfahren hergestellten Mahlwerkzeuge eines Kegelrenners beschrieben. In dieser Zeichnung zeigtIn the following, with reference to a drawing, those produced by the method according to the invention are shown Grinding tools of a cone burner described. In this drawing shows
Fig. 1 einen Längsschnitt durch die Mahlwerkzeuge eines Kegelrefiners,Fig. 1 is a longitudinal section through the grinding tools a cone refiner,
F i g. 2 einen Querschnitt nach Linie II-II der F i g. 1 in vergrößertem Maßstab.F i g. 2 shows a cross section along line II-II of FIG F i g. 1 on an enlarged scale.
Die in F i g. 1 und 2 dargestellten Mahlwerkzeuge eines Kegelrefiners bestehen aus einem auf einer Welle 9 befestigten Rotor 10 und aus einem mit diesem zusammenarbeitenden Stator 20, der in einem nicht dargestellten Gehäuse fest eingebaut ist. Der Rotor 10 und der Stator 20 weisen auf ihren einander zugekehrten Mantelflächen 11, 21 angegossene, etwa in Längsrichtung verlaufende Messer 12, 22 auf. Die zwischen den Messern 12, 22 befindlichen Nuten 13, 23 sind vom Nutgrund bis etwa auf halbe Höhe mit einer Kunststoff-Füllung 14, 24 versehen,The in F i g. 1 and 2 shown grinding tools of a cone refiner consist of one on one Shaft 9 fixed rotor 10 and from a cooperating with this stator 20, which in a housing, not shown, is permanently installed. The rotor 10 and the stator 20 face each other facing circumferential surfaces 11, 21 cast-on knives 12, 22 extending approximately in the longitudinal direction. the Grooves 13, 23 located between the knives 12, 22 are from the bottom of the groove up to about half the height a plastic filling 14, 24 provided,
Da der Kunststoff nach dem Einfüllen in geringem Maße schwindet, bildet die Oberfläche der Nutenfüllung eine Mulde, wie in F i g. 2 dargestellt.Since the plastic shrinks to a small extent after filling, the surface of the groove filling forms a trough, as in FIG. 2 shown.
Claims (3)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681757328 DE1757328B1 (en) | 1968-04-25 | 1968-04-25 | Process for manufacturing grinding tools for refiners, defibrators or the like. |
FR6911303A FR2006879A1 (en) | 1968-04-25 | 1969-04-11 | |
FI691092A FI46539C (en) | 1968-04-25 | 1969-04-15 | Cast grinding tools for processing machines, especially disc refiners for fibrous materials. |
SE05828/69A SE339787B (en) | 1968-04-25 | 1969-04-24 | |
AT394969A AT290283B (en) | 1968-04-25 | 1969-04-24 | Cast grinding tool for pulp processing machines, especially for disc refiners |
GB21166/69A GB1207655A (en) | 1968-04-25 | 1969-04-25 | Grinding tool for fibre processing machines |
US00169182A US3745645A (en) | 1968-04-25 | 1971-08-05 | Method of manufacture and operation of ribbed member for treatment of fibrous suspensions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681757328 DE1757328B1 (en) | 1968-04-25 | 1968-04-25 | Process for manufacturing grinding tools for refiners, defibrators or the like. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1757328B1 true DE1757328B1 (en) | 1971-05-06 |
Family
ID=5694474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19681757328 Withdrawn DE1757328B1 (en) | 1968-04-25 | 1968-04-25 | Process for manufacturing grinding tools for refiners, defibrators or the like. |
Country Status (7)
Country | Link |
---|---|
US (1) | US3745645A (en) |
AT (1) | AT290283B (en) |
DE (1) | DE1757328B1 (en) |
FI (1) | FI46539C (en) |
FR (1) | FR2006879A1 (en) |
GB (1) | GB1207655A (en) |
SE (1) | SE339787B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2524883A1 (en) * | 1975-06-04 | 1976-12-16 | Probst & Class Maschinenfabrik | Homogeniser rotors made of casting resin - contg. hard particles in surface zone provided with cast teeth for milling foodstuffs etc. |
DE3103512A1 (en) * | 1981-02-03 | 1982-08-26 | Hans-Peter 2000 Hamburg Bockwoldt | Method and apparatus for producing oil (e.g. heavy oil or light heating oil) and water (in particular seawater) emulsions and coal dust/water (in particular seawater) suspensions having a viscosity suitable for combustion for injection into the hot-air blast of blast furnances, fuel mixing plants, combined heating and power stations and the like |
DE3200666A1 (en) * | 1981-02-03 | 1983-07-21 | Hans-Peter 2000 Hamburg Bockwoldt | DEVICE FOR PRODUCING OEL AS fuel oil OR LIGHT HEATING OIL-WATER, INCLUDING SEA WATER EMULSIONS AND COAL DUST WATER, INCLUDING SEA WATER-SUSPENSIONS WITH THE BURNING suitable viscosity for spraying IN THE HOT WIND POWER of blast furnaces, FUEL PLANTS, POWER PLANT FACILITIES U. DGL. |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3880368A (en) * | 1973-03-12 | 1975-04-29 | Beloit Corp | Pulp refiner element |
US3921342A (en) * | 1973-12-17 | 1975-11-25 | Spitfire Tool & Machine Co Inc | Lap plate |
US4472241A (en) * | 1983-06-15 | 1984-09-18 | E. I. Du Pont De Nemours And Company | Co-refining of aramid fibrids and floc |
US4681270A (en) * | 1985-11-08 | 1987-07-21 | Sullivan Corporation | Manufactured refining element |
DE4018785A1 (en) * | 1990-06-12 | 1991-12-19 | Krupp Polysius Ag | ROLL MILL |
US5373995A (en) * | 1993-08-25 | 1994-12-20 | Johansson; Ola M. | Vented refiner and venting process |
DE4330882A1 (en) * | 1993-09-13 | 1995-03-16 | Klaus Lanner | Device for crushing steel or metal chips |
US5954283A (en) * | 1996-04-15 | 1999-09-21 | Norwalk Industrial Components, Llc | Papermaking refiner plates |
EP1158088A3 (en) | 2000-05-26 | 2003-01-22 | Voith Paper Patent GmbH | Process and device for treating a fibrous suspension |
DE10258324B4 (en) * | 2002-12-13 | 2008-03-27 | Voith Patent Gmbh | Process for the production of sets for the milling of hydrous paper pulp |
GB2410258A (en) * | 2004-01-20 | 2005-07-27 | David Windsor Hewitt | Use of plastic template with tiles, bricks and the like |
JP5148075B2 (en) | 2005-10-13 | 2013-02-20 | 株式会社アーステクニカ | Powder processing equipment and powder processing equipment |
CN102086606B (en) * | 2010-11-26 | 2013-02-13 | 蓝星(成都)新材料有限公司 | Grinding table of disc grinder for preparing synthetic fiber pulp |
US9433725B2 (en) | 2011-12-23 | 2016-09-06 | Alcon Research, Ltd. | Combined coaxial and bimanual irrigation/aspiration apparatus |
BR112015030230B1 (en) | 2013-06-06 | 2021-05-11 | Alcon Inc | suction/irrigation cannula device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE335040C (en) * | 1921-03-26 | Alfred Menzel | Millstone with inlays between the milling surfaces | |
DE932047C (en) * | 1951-03-29 | 1955-08-22 | Francois Janssen | Millstone |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2409453A (en) * | 1941-07-05 | 1946-10-15 | Bolton John W & Sons Inc | Jordan engine lining |
US3059863A (en) * | 1959-04-06 | 1962-10-23 | Bolton John W & Sons Inc | Segmental filling for refiner plugs |
US3278127A (en) * | 1963-08-16 | 1966-10-11 | Bolton Emerson | Jordan plug liner |
US3323733A (en) * | 1964-08-28 | 1967-06-06 | Fibers Unltd Inc | Coaxial disc and cylindrical rotor refining apparatus |
-
1968
- 1968-04-25 DE DE19681757328 patent/DE1757328B1/en not_active Withdrawn
-
1969
- 1969-04-11 FR FR6911303A patent/FR2006879A1/fr not_active Withdrawn
- 1969-04-15 FI FI691092A patent/FI46539C/en active
- 1969-04-24 AT AT394969A patent/AT290283B/en active
- 1969-04-24 SE SE05828/69A patent/SE339787B/xx unknown
- 1969-04-25 GB GB21166/69A patent/GB1207655A/en not_active Expired
-
1971
- 1971-08-05 US US00169182A patent/US3745645A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE335040C (en) * | 1921-03-26 | Alfred Menzel | Millstone with inlays between the milling surfaces | |
DE932047C (en) * | 1951-03-29 | 1955-08-22 | Francois Janssen | Millstone |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2524883A1 (en) * | 1975-06-04 | 1976-12-16 | Probst & Class Maschinenfabrik | Homogeniser rotors made of casting resin - contg. hard particles in surface zone provided with cast teeth for milling foodstuffs etc. |
DE3103512A1 (en) * | 1981-02-03 | 1982-08-26 | Hans-Peter 2000 Hamburg Bockwoldt | Method and apparatus for producing oil (e.g. heavy oil or light heating oil) and water (in particular seawater) emulsions and coal dust/water (in particular seawater) suspensions having a viscosity suitable for combustion for injection into the hot-air blast of blast furnances, fuel mixing plants, combined heating and power stations and the like |
DE3200666A1 (en) * | 1981-02-03 | 1983-07-21 | Hans-Peter 2000 Hamburg Bockwoldt | DEVICE FOR PRODUCING OEL AS fuel oil OR LIGHT HEATING OIL-WATER, INCLUDING SEA WATER EMULSIONS AND COAL DUST WATER, INCLUDING SEA WATER-SUSPENSIONS WITH THE BURNING suitable viscosity for spraying IN THE HOT WIND POWER of blast furnaces, FUEL PLANTS, POWER PLANT FACILITIES U. DGL. |
Also Published As
Publication number | Publication date |
---|---|
AT290283B (en) | 1971-05-25 |
US3745645A (en) | 1973-07-17 |
FI46539C (en) | 1973-04-10 |
FI46539B (en) | 1973-01-02 |
GB1207655A (en) | 1970-10-07 |
SE339787B (en) | 1971-10-18 |
FR2006879A1 (en) | 1970-01-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1757328B1 (en) | Process for manufacturing grinding tools for refiners, defibrators or the like. | |
DE1201045B (en) | Process for the recovery of chip material from waste, sawdust, gauze, etc., interspersed with hardened binding agents, for the production of chipboard and similar glued or pressed products | |
DE1988859U (en) | GRINDING TOOL FOR REFINERS, DEFIBRATORS OD. DGL. | |
DE1943524A1 (en) | Disc refiner | |
DE2307988C3 (en) | Blow bar for impact mill rotors | |
DE610723C (en) | Roll crusher | |
DE3128660C2 (en) | ||
DE719434C (en) | Agitator blade coupling | |
DE686674C (en) | Centrifugal machine with molding boxes arranged in a circle | |
DE662191C (en) | Device for manufacturing rubber sieves | |
DE598169C (en) | Method of securing a propeller wing in a hub or metal sleeve | |
DE690896C (en) | Lead beam for the printing set | |
DE579009C (en) | Roller milling machine with a length larger in relation to the diameter and a jacket made of high quality tool steel attached to a core made of ordinary steel | |
DE2738091A1 (en) | Wear resistant, composite cast beater for hammer mills - using wrought steel sheath for white alloy cast iron core | |
DE335040C (en) | Millstone with inlays between the milling surfaces | |
DE666161C (en) | Process for the production of crushing jaws | |
EP0694374A2 (en) | Scraper for fine roll mill, milling raw materials for ceramic products | |
DE2935768C2 (en) | Beaters for hammer mills | |
DE816877C (en) | Process for the production of a milling cutter, in particular for woodworking | |
DE2853716A1 (en) | Paper pulp shredding mill - fed with water and air under pressure and at high temp., through porous coating | |
DE6812296U (en) | REINFORCEMENT BAR | |
DE2524883C2 (en) | Grinder body and process for its manufacture | |
DE476484C (en) | Process for influencing the speed of rotation of the grinding stones used by wood grinders | |
DE452331C (en) | Casting mold for die setting and line casting machines with a side wall, which consists of an inner hardened steel part and an outer non-hardened reinforcement part, which are held together by means of screws passing through the reinforcement part and bordering into the steel part | |
DE868041C (en) | Synthetic strand cutting machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 | ||
8339 | Ceased/non-payment of the annual fee |