EP0090248A2 - Document comminuting device - Google Patents

Document comminuting device Download PDF

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Publication number
EP0090248A2
EP0090248A2 EP83102494A EP83102494A EP0090248A2 EP 0090248 A2 EP0090248 A2 EP 0090248A2 EP 83102494 A EP83102494 A EP 83102494A EP 83102494 A EP83102494 A EP 83102494A EP 0090248 A2 EP0090248 A2 EP 0090248A2
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EP
European Patent Office
Prior art keywords
teeth
tooth
cutting roller
heights
roller
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.)
Granted
Application number
EP83102494A
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German (de)
French (fr)
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EP0090248B1 (en
EP0090248A3 (en
Inventor
Zoltan Berger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Borbe Wanner AG
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Borbe Wanner AG
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Publication date
Application filed by Borbe Wanner AG filed Critical Borbe Wanner AG
Priority to AT83102494T priority Critical patent/ATE17661T1/en
Publication of EP0090248A2 publication Critical patent/EP0090248A2/en
Publication of EP0090248A3 publication Critical patent/EP0090248A3/en
Application granted granted Critical
Publication of EP0090248B1 publication Critical patent/EP0090248B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B02C18/182—Disc-shaped knives

Definitions

  • the invention relates to a device for shredding document material, which has a rotating cutting roller with at least one row of teeth formed from teeth of different tooth heights and a firmly supported toothed bar which interacts with the cutting roller and is profiled in accordance with the teeth of the cutting roller.
  • Document material is understood to mean all types of documents made of film, sheet and ribbon material.
  • the material can also be different and e.g. Paper, plastic or the like include.
  • Plastic tapes of all kinds play an important role as document material today, e.g. Magnetic tapes, microfilm tapes and the like.
  • the document material mentioned occurs in significant quantities in different places and has to be used for different reasons,. e.g. in terms of secrecy or removal due to aging and obsolescence. Here, however, it is necessary that the destruction takes place in such a way that no information can be extracted from the document material, even if it would fall into unauthorized and unauthorized hands.
  • a particularly reliable impossibility of extracting information from document material is that To make document material to be destroyed unusable by breaking it down into extremely small parts.
  • Various designs are known for this purpose, which break down the document material into more or less small parts.
  • a high-speed rotor is used, which is equipped with one or two rows of teeth, which interact with a fixed toothed rack.
  • the teeth of one row of teeth are alternately designed with different tooth heights.
  • the toothed rack is also crenellated according to this tooth sequence. So that a uniform shredding of the document material is achieved, a feed pad is provided, on which a feed roller is arranged.
  • the tooth height of the small teeth measured from the tooth base on the circumference of the roller body, is equal to or less than the difference between the tooth heights of a larger and smaller tooth.
  • the cutting roller 1 shown in FIG. 1 is a schematic illustration, since an accurate graphic representation is not possible in view of the small tooth height.
  • the cutting roller 1 has, see Fig. 2, a number Rows of teeth extending axially across the width of the cutting roller 1, of which two rows of teeth 2, 3 are shown in FIG.
  • the rows of teeth 2 and 3 are composed of teeth, of which a larger tooth 4 is followed by a smaller tooth 5, which is followed by a larger tooth 4.
  • the larger teeth 4 of all rows of teeth 2, 3 form protruding sections 6 on cutting roller 1, while the smaller teeth 5 of all rows of teeth 2, 3 form recessed sections 7 on cutting drum 1.
  • the tooth height, see FIG. 2, of the larger teeth 4 is denoted by a and the tooth height of the smaller teeth 5 by b.
  • This equation states that the difference in the tooth heights of the larger and smaller teeth 4, 5 must be greater than the tooth height of the smaller tooth 5. If this condition is observed on the cutting roller 1, the undesirable case of the formation of long stripes cannot occur, even if the feed is not set correctly or is not working properly.
  • This condition can also be represented as the ratio between the tooth heights of the two teeth 4, 5, which according to the above statements must be at least 2.0. Appropriate values of this ratio are between 2.1 and 3.5.
  • the cutting roller 1 is supported in two bearing blocks 11, 12 by means of roller bearings 9, 10.
  • the two bearing blocks 11, 12 are connected to one another by a toothed strip 13, which has a profile which corresponds to that of the protruding and recessed parts 6, 7 of the cutting roller 1 Right.
  • the toothed rack 13 can be adjusted in its distance from the cutting roller 1.
  • FIGS. 1 and 2 are not a dimensionally correct representation, it should be mentioned that the tooth height of the larger teeth 4 is chosen to be less than 1 mm. Accordingly, the difference A is of the order of a few tenths of a millimeter.
  • the speed of the cutting roller 1 can be chosen small, e.g. less than 250 rpm, but preferably less than 150 rpm. The low speed also means that the power for driving the cutting roller 1 is small and is less than 100-200 watts. Nevertheless, the performance of a cutting roller 1 designed in this way is very high and comparable to the performance of known designs which, however, require a performance which is at least a power of ten higher.
  • FIGS. 1 and 2 schematically shows a machine for shredding document material, which is equipped with a cutting roller 1 according to FIGS. 1 and 2.
  • the machine consists essentially of three parts, a shredding part I, a collecting part II and a ventilation part III.
  • the shredding part I which is shown in section, has a cutting roller 1, which is arranged at the end of a practically vertical feed nip 14 through which the document material is introduced. In this case, the document material is fed through its own weight. In spite of the lack of a feed device, a perfect comminution of the material is achieved since the material is arranged on the roller body of the cutting roller 1 Teeth 4, 5 have the tooth heights according to the invention.
  • the toothed rack 13 is arranged at the end of the feed gap 14.
  • the cutting roller 1 is driven by a drive motor 15, for example a gear motor, via an enveloping drive 16, for example a toothed belt drive.
  • the shredded material is collected in a bag 17 arranged in the collecting part II.
  • a fan arranged in the ventilation part III generates a suction flow through which the shredded document material reliably reaches the sack 17.
  • the machine can be provided with castors so that it can be used in different places.
  • parts I - III of the machine can be arranged in another way, e.g. lying.
  • a feed device can also be provided in the gap 14, in particular when the gap 14 is not arranged vertically, but rather at an angle or horizontally. It is essential, however, that in any case the cutting roller 1 is designed in the manner described in order to take advantage of such a machine, i.e. low drive power, low speeds of the cutting roller 1 with a correspondingly low noise level and reliable shredding of the document material into the smallest fragments.
  • the cutting roller 1 can expediently be produced from a single hardened piece of material.
  • the walls of the machine according to FIG. 3 can expediently be made of light metal or plastic.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Lubricants (AREA)

Abstract

A document shredder having a rotary cutter with axially extending rows of teeth, each row having alternating teeth of different heights. The heights of the teeth are selected such that the difference in the heights of the teeth is greater than the height of the smaller teeth. This relationship ensures breaking up of the document into small shreds and allows the cutter to be driven at low speeds, thereby reducing the power requirements and the noise level.

Description

Die Erfindung betrifft eine Vorrichtung zum Zerkleinern von Dokumentmaterial, die eine rotierende Schneidwalze mit mindestens einer aus Zähnen unterschiedlicher Zahnhöhen gebildeten Zahnreihe und eine fest abgestützte, mit der Schneidwalze zusammenwirkende und entsprechend den Zähnen der Schneidwalze profilierte Zahnleiste aufweist.The invention relates to a device for shredding document material, which has a rotating cutting roller with at least one row of teeth formed from teeth of different tooth heights and a firmly supported toothed bar which interacts with the cutting roller and is profiled in accordance with the teeth of the cutting roller.

Unter Dokumentmaterial werden alle Arten von Dokumenten aus folien-, blatt- und bandförmigem Material verstanden. Das Material kann ebenfalls verschieden sein und z.B. Papier, Kunststoff o.dgl. umfassen. Eine bedeutende Rolle als Dokumentmaterial spielen heute Kunststoffbänder aller Art, z.B. Magnetbänder, Mikrofilmbänder u.dgl.Document material is understood to mean all types of documents made of film, sheet and ribbon material. The material can also be different and e.g. Paper, plastic or the like include. Plastic tapes of all kinds play an important role as document material today, e.g. Magnetic tapes, microfilm tapes and the like.

Das genannte Dokumentmaterial fällt an verschiedenen Orten in bedeutenden Mengen an und muss aus verschiedenen Gründen, . z.B. im Hinblick auf die Geheimhaltung oder im Hinblick auf das Entfernen infolge Ueberalterung und Ueberholtsein, vernichtet werden. Hierbei ist es jedoch erforderlich, dass die Vernichtung in einer solchen Weise erfolgt, dass aus dem Dokumentmaterial, auch wenn es in unberechtigte und unbefugte Hände fallen würde, keinerlei Informationen zu entnehmen sind.The document material mentioned occurs in significant quantities in different places and has to be used for different reasons,. e.g. in terms of secrecy or removal due to aging and obsolescence. Here, however, it is necessary that the destruction takes place in such a way that no information can be extracted from the document material, even if it would fall into unauthorized and unauthorized hands.

Eine besonders zuverlässige Verunmöglichung der Entnahme von Informationen aus Dokumentmaterial besteht darin, das zu vernichtende Dokumentmaterial dadurch unbrauchbar zu machen, dass es in äusserst kleine Teile zerlegt wird. Hierzu sind verschiedene Ausführungen bekannt, die das Dokumentmaterial in mehr oder weniger kleine Teile zerlegen. Bei einer bekannten Ausführungsform (US-Patentschrift 4,200,239) wird ein hochtouriger Rotor verwendet, der mit einer oder zwei Zahnreihen bestückt ist, die mit einer festen Zahnleiste zusammenwirken. Um eine gute Zerkleinerungswirkung zu erreichen, werden die Zähne einer Zahnreihe abwechselnd mit unterschiedlicher Zahnhöhe ausgeführt. Die Zahnleiste wird ebenfalls entsprechend dieser Zahnfolge zinnenförmig ausgebildet. Damit eine gleichmässige Zerkleinerung des Dokumentmaterials erreicht wird, ist eine Zuführungsunterlage vorgesehen, an der eine Vorschubwalze angeordnet ist. Diese hat die Aufgabe, das blatt-, band- oder folienförmige Dokumentmaterial gleichmässig gegen die rotierenden Zähne des Rotors zu schieben. Wird nun aber bei dieser bekannten Ausführungsform der Vorschub in bezug auf die Rotordrehzahl nicht richtig eingestellt, wird kein sauberes Trennen des Dokumentmaterials in Einzelteile erreicht. Der Grund hierfür liegt darin, dass der Vorschub des Dokumentmaterials pro Zahnreihe grösser ist als der radiale Abstand zwischen den Zahnköpfen der grösseren und der kleineren Zähne einer Zahnreihe. Tritt dieser Fall ein, können die ungleich langen Zähne keine einzelnen Schnipsel mehr vom zugeführten Dokumentmaterial abtrennen, sondern sie trennen ein über die axiale Breite des Rotors zusammenhängendes, zinnenförmig geformtes Band ab. Dies ist jedoch nicht erwünscht, denn dadurch ist die Zerstörung jedwelcher Information auf dem Dokumentmaterial nicht mehr gewährleistet. Bei der bekannten Ausführungsform ist es deshalb erforderlich, dass der Vorschub kontrolliert und dafür gesorgt wird, dass der Vorschub in der Weise richtig funktioniert, dass keine in axialer Breite des Rotors zusammenhängenden Schnipsel entstehen. Dies bedingt jedoch eine Komplikation der Vorrichtung, da in jedem Fall eine Vorschubeinrichtung vorgesehen werden muss.A particularly reliable impossibility of extracting information from document material is that To make document material to be destroyed unusable by breaking it down into extremely small parts. Various designs are known for this purpose, which break down the document material into more or less small parts. In a known embodiment (US Pat. No. 4,200,239), a high-speed rotor is used, which is equipped with one or two rows of teeth, which interact with a fixed toothed rack. In order to achieve a good grinding effect, the teeth of one row of teeth are alternately designed with different tooth heights. The toothed rack is also crenellated according to this tooth sequence. So that a uniform shredding of the document material is achieved, a feed pad is provided, on which a feed roller is arranged. This has the task of evenly pushing the sheet, ribbon or foil-shaped document material against the rotating teeth of the rotor. However, if the feed is not set correctly in relation to the rotor speed in this known embodiment, the document material cannot be properly separated into individual parts. The reason for this is that the feed of the document material per row of teeth is greater than the radial distance between the tooth tips of the larger and smaller teeth of a row of teeth. If this happens, the teeth of unequal length can no longer separate individual snippets from the document material that is being fed in, but instead cut off a crenellated band connected across the axial width of the rotor. However, this is not desirable, because the destruction of any information on the document material is no longer guaranteed. In the known embodiment, it is therefore necessary for the feed to be checked and to ensure that the feed functions properly in such a way that there are no cuttings connected in the axial width of the rotor. However, this requires a complication of the device, since a feed device must always be provided.

Hier setzt die Erfindung ein, der die Aufgabe zugrundeliegt, eine Vorrichtung der eingangs beschriebenen Art so auszugestalten, dass das Entstehen von zusammenhängenden Schnipseln zuverlässig vermieden wird, selbst wenn die Vorschubeinrichtung den Vorschub nicht zuverlässig einhält.This is where the invention comes in, which is based on the object of designing a device of the type described at the outset in such a way that the formation of coherent snippets is reliably avoided, even if the feed device does not reliably keep the feed.

Diese Aufgabe wird gemäss der Erfindung dadurch gelöst, dass von den auf dem Walzenkörper der Schneidwalze angeordneten und die Zahnreihe bildenden Zähnen die Zahnhöhe der kleinen Zähne, gemessen vom Zahnfuss am Umfang des Walzenkörpers, gleich oder kleiner ist als die Differenz der Zahnhöhen je eines grösseren und kleineren Zahns.This object is achieved according to the invention in that of the teeth arranged on the roller body of the cutting roller and forming the row of teeth, the tooth height of the small teeth, measured from the tooth base on the circumference of the roller body, is equal to or less than the difference between the tooth heights of a larger and smaller tooth.

Die Erfindung ist in der Zeichnung anhand eines Ausführungsbeispiels dargestellt und nachfolgend beschrieben. Es zeigen:

  • Fig. 1 eine Ansicht einer erfindungsgemässen Schneidwalze im Zusammenwirken mit einer ortsfesten Zahnleiste,
  • Fig. 2 eine schematische Darstellung eines Schnittes der Schneidwalze nach Fig. 1 und
  • Fig. 3 eine Seitenansicht, teilweise im Schnitt, einer schematisch dargestellten Maschine zum Zerkleinern von Dokumentmaterial.
The invention is illustrated in the drawing using an exemplary embodiment and described below. Show it:
  • 1 is a view of a cutting roller according to the invention in cooperation with a fixed rack,
  • Fig. 2 is a schematic representation of a section of the cutting roller according to Fig. 1 and
  • Fig. 3 is a side view, partly in section, of a schematically illustrated machine for shredding document material.

Die in Fig. 1 dargestellte Schneidwalze 1 ist eine schematische Darstellung, da im Hinblick auf die kleine Zahnhöhe eine genaue zeichnerische Darstellung nicht möglich ist. Die Schneidwalze 1 weist, siehe Fig. 2, eine Anzahl sich axial über die Breite der Schneidwalze 1 erstreckende Zahnreihen auf, von denen in Fig. 2 zwei Zahnreihen 2, 3 dargestellt sind. Die Zahnreihen 2 und 3 setzen sich aus Zähnen zusammen, von denen jeweils ein grösserer Zahn 4 von einem kleineren Zahn 5 gefolgt ist, welch letzterem wieder ein grösserer Zahn 4 folgt. Die grösseren Zähne 4 aller Zahnreihen 2, 3 bilden auf der Schneidwalze 1 vorstehende Partien 6, während die kleineren Zähne 5 aller Zahnreihen 2, 3 zurückstehende Partien 7 auf der Schneidwalze 1 bilden. Die Zahnhöhe, siehe Fig. 2, der grösseren Zähne 4 ist mit a und die Zahnhöhe der kleineren Zähne 5 mit b bezeichnet. In Wirklichkeit sind jedoch die kleineren Zähne 5 nicht als isolierter Zahn erkennbar, sondern bilden eine Schneide im Abstand b vom Umfang des Walzenkörpers 8 zwischen jeweils zwei grösseren Zähnen 4. Wesentlich ist nun, dass die Differenz 4 = a - b > b.The cutting roller 1 shown in FIG. 1 is a schematic illustration, since an accurate graphic representation is not possible in view of the small tooth height. The cutting roller 1 has, see Fig. 2, a number Rows of teeth extending axially across the width of the cutting roller 1, of which two rows of teeth 2, 3 are shown in FIG. The rows of teeth 2 and 3 are composed of teeth, of which a larger tooth 4 is followed by a smaller tooth 5, which is followed by a larger tooth 4. The larger teeth 4 of all rows of teeth 2, 3 form protruding sections 6 on cutting roller 1, while the smaller teeth 5 of all rows of teeth 2, 3 form recessed sections 7 on cutting drum 1. The tooth height, see FIG. 2, of the larger teeth 4 is denoted by a and the tooth height of the smaller teeth 5 by b. In reality, however, the smaller teeth 5 are not recognizable as an isolated tooth, but rather form a cutting edge at a distance b from the circumference of the roller body 8 between two larger teeth 4. It is essential that the difference 4 = a - b> b.

Diese Gleichung besagt, dass die Differenz der Zahnhöhen der grösseren und kleineren Zähne 4, 5 grösser sein muss als die Zahnhöhe des kleineren Zahnes 5. Wird diese Bedingung an der Schneidwalze 1 eingehalten, kann der unerwünschte Fall der Bildung von langen Streifen nicht eintreten, selbst wenn der Vorschub nicht richtig eingestellt ist oder nicht richtig funktioniert. Diese Bedingung kann auch als Verhältnis zwischen den Zahnhöhen der beiden Zähne 4, 5 dargestellt werden, das nach den vorstehenden Ausführungen mindestens 2,0 sein muss. Zweckmässige Werte dieses Verhältnisses liegen zwischen 2,1 und 3,5.This equation states that the difference in the tooth heights of the larger and smaller teeth 4, 5 must be greater than the tooth height of the smaller tooth 5. If this condition is observed on the cutting roller 1, the undesirable case of the formation of long stripes cannot occur, even if the feed is not set correctly or is not working properly. This condition can also be represented as the ratio between the tooth heights of the two teeth 4, 5, which according to the above statements must be at least 2.0. Appropriate values of this ratio are between 2.1 and 3.5.

Die Schneidwalze 1 ist mittels Wälzlagern 9, 10 in zwei Lagerböcken 11, 12 gelagert. Die beiden Lagerböcke 11, 12 sind durch eine Zahnleiste 13 miteinander verbunden, die eine Profilierung aufweist, die mit derjenigen der vorstehenden und zurückstehenden Partien 6, 7 der Schneidwalze 1 übereinstimmt. Die Zahnleiste 13 kann in ihrem Abstand zur Schneidwalze 1 eingestellt werden.The cutting roller 1 is supported in two bearing blocks 11, 12 by means of roller bearings 9, 10. The two bearing blocks 11, 12 are connected to one another by a toothed strip 13, which has a profile which corresponds to that of the protruding and recessed parts 6, 7 of the cutting roller 1 Right. The toothed rack 13 can be adjusted in its distance from the cutting roller 1.

Da die Fig. 1 und 2 keine dimensionsgerechte Darstellung sind, sei erwähnt, dass die Zahnhöhe der grösseren Zähne 4 kleiner gewählt wird als l mm. Dementsprechend ist die Differenz A in der Grössenordnung von einigen Zehnteln Millimetern. Durch die Wahl solcher Zähne 4, 5 und die Anordnung vieler Zahnreihen, z.B. mindenstens vierzig, kann die Drehzahl der Schneidwalze 1 klein gewählt werden, z.B. kleiner als 250 U/min, vorzugsweise jedoch kleiner als 150 U/min. Durch die niedere Drehzahl wird auch erreicht, dass die Leistung für den Antrieb der Schneidwalze 1 klein ist und weniger als 100 - 200 Watt beträgt. Trotzdem ist die Leistung einer in dieser Weise ausgebildeten Schneidwalze 1 sehr hoch und vergleichbar mit der Leistung bekannter Ausführungen, die jedoch eine mindestens um eine Zehnerpotenz grössere Leistung benötigen.Since FIGS. 1 and 2 are not a dimensionally correct representation, it should be mentioned that the tooth height of the larger teeth 4 is chosen to be less than 1 mm. Accordingly, the difference A is of the order of a few tenths of a millimeter. By choosing such teeth 4, 5 and arranging many rows of teeth, e.g. at least forty, the speed of the cutting roller 1 can be chosen small, e.g. less than 250 rpm, but preferably less than 150 rpm. The low speed also means that the power for driving the cutting roller 1 is small and is less than 100-200 watts. Nevertheless, the performance of a cutting roller 1 designed in this way is very high and comparable to the performance of known designs which, however, require a performance which is at least a power of ten higher.

In Fig. 3 ist schematisch eine Maschine zum Zerkleinern von Dokumentmaterial dargestellt, die mit einer Schneidwalze 1 nach Fig. 1 und 2 ausgerüstet ist. Die Maschine setzt sich im wesentlichen aus drei Teilen zusammen, einem Zerkleinerungsteil I, einem Auffangteil II und einem Belüftungsteil III.3 schematically shows a machine for shredding document material, which is equipped with a cutting roller 1 according to FIGS. 1 and 2. The machine consists essentially of three parts, a shredding part I, a collecting part II and a ventilation part III.

Der Zerkleinerungsteil I, der im Schnitt dargestellt ist, weist eine Schneidwalze 1 auf, die am Ende eines praktisch vertikal verlaufenden Zuführungsspaltes 14 angeordnet ist, durch den das Dokumentmaterial eingeführt wird. In diesem Fall erfolgt der Vorschub des Dokumentmaterials durch sein Eigengewicht. Trotz einer fehlenden Vorschubeinrichtung wird ein einwandfreies Zerkleinern des Materials erreicht, da die auf dem Walzenkörper der Schneidwalze 1 angeordneten Zähne 4, 5 die erfindungsgemässen Zahnhöhen aufweisen. Am Ende des Zuführungsspaltes 14 ist die Zahnleiste 13 angeordnet. Die Schneidwalze 1 wird von einem Antriebsmotor 15, z.B. einem Getriebemotor, über einen Hülltrieb 16, z.B. einen Zahnriementrieb, angetrieben. Das zerkleinerte Material wird in einem im Auffangteil II angeordneten Sack 17 aufgefangen. Ein im Belüftungsteil III angeordneter Ventilator erzeugt eine Saugströmung, durch die das zerkleinerte Dokumentmaterial zuverlässig in den Sack 17 gelangt.The shredding part I, which is shown in section, has a cutting roller 1, which is arranged at the end of a practically vertical feed nip 14 through which the document material is introduced. In this case, the document material is fed through its own weight. In spite of the lack of a feed device, a perfect comminution of the material is achieved since the material is arranged on the roller body of the cutting roller 1 Teeth 4, 5 have the tooth heights according to the invention. The toothed rack 13 is arranged at the end of the feed gap 14. The cutting roller 1 is driven by a drive motor 15, for example a gear motor, via an enveloping drive 16, for example a toothed belt drive. The shredded material is collected in a bag 17 arranged in the collecting part II. A fan arranged in the ventilation part III generates a suction flow through which the shredded document material reliably reaches the sack 17.

Die Maschine kann mit Fahrrollen versehen sein, so dass sie an verschiedenen Orten eingesetzt werden kann. Selbstverständlich können die Teile I - III der Maschine in anderer Weise angeordnet sein, z.B. liegend. Selbstverständlich kann auch eine Vorschubeinrichtung im Spalt 14 vorgesehen werden, insbesondere dann, wenn der Spalt 14 nicht vertikal, sondern schräg oder horizontal angeordnet wird. Wesentlich ist jedoch, dass in jedem Fall die Schneidwalze 1 in der beschriebenen Weise ausgeführt wird, um die Vorteile einer solchen Maschine auszunützen, d.h. niedere Antriebsleistung, niedere Drehzahlen der Schneidwalze 1 mit entsprechend niederem Geräuschpegel und ein zuverlässiges Zerkleinern des Dokumentmaterials in kleinste Schnipsel.The machine can be provided with castors so that it can be used in different places. Of course, parts I - III of the machine can be arranged in another way, e.g. lying. Of course, a feed device can also be provided in the gap 14, in particular when the gap 14 is not arranged vertically, but rather at an angle or horizontally. It is essential, however, that in any case the cutting roller 1 is designed in the manner described in order to take advantage of such a machine, i.e. low drive power, low speeds of the cutting roller 1 with a correspondingly low noise level and reliable shredding of the document material into the smallest fragments.

Die Schneidwalze 1 kann zweckmässig aus einem einzigen gehärteten Materialstück hergestellt werden. Die Wände der Maschine nach Fig. 3 können zweckmässig aus Leichtmetall oder aus Kunststoff hergestellt sein.The cutting roller 1 can expediently be produced from a single hardened piece of material. The walls of the machine according to FIG. 3 can expediently be made of light metal or plastic.

Der theoretisch kleinste Wert des Zahnhöhenverhältnisses a/b von 2,0, damit die Schnipselbreite gleich der Zahnbreite ist, muss in der Praxis je nach dem zu verarbeitenden Dokumentmaterial etwas grösser gewählt werden, damit kein in der Breite zusammenhängendes Schnipselmaterial entsteht. Wesentlich ist jedoch, dass der grösste Vorschub des Dokumentmaterials pro Zahnreihe durch den Umfang des Walzenkörpers 8 begrenzt ist und somit nie grösser als die Zahnhöhe b des kleineren Zahns 5 sein kann.The theoretically smallest value of the tooth height ratio a / b of 2.0, so that the snippet width is equal to the tooth width, has to be chosen a little larger in practice depending on the document material to be processed, so that there is no snippet material connected in the width. Essentials Lich, however, is that the largest feed of the document material per row of teeth is limited by the circumference of the roller body 8 and thus can never be greater than the tooth height b of the smaller tooth 5.

Claims (8)

1. Vorrichtung zum Zerkleinern von Dokumentmaterial, die eine rotierende Schneidwalze (1) mit mindestens einer aus Zähnen (4, 5) unterschiedlicher Zahnhöhen gebildeten Zahnreihe (2, 3) und eine fest abgestützte, mit der Schneidwalze (1) zusammenwirkende und entsprechend den Zähnen (4, 5) der Schneidwalze (1) profilierte Zahnleiste (13) aufweist, dadurch gekennzeichnet, dass von den auf dem Walzenkörper (8) der Schneidwalze (1) angeordneten und die Zahnreihe (2, 3) bildenden Zähnen (4, 5) die Zahnhöhe (b) der kleinen Zähne (5), gemessen vom Zahnfuss am Umfang des Walzenkörpers (8), gleich oder kleiner ist als die Differenz Δ der Zahnhöhen (a, b) je eines grösseren und kleineren Zahns (4, 5).1. Device for comminuting document material, which has a rotating cutting roller (1) with at least one row of teeth (2, 3) formed from teeth (4, 5) of different tooth heights and a firmly supported, cooperating with the cutting roller (1) and corresponding to the teeth (4, 5) of the cutting roller (1) has a profiled toothed strip (13), characterized in that of the teeth (4, 5) arranged on the roller body (8) of the cutting roller (1) and forming the row of teeth (2, 3) the tooth height (b) of the small teeth (5), measured from the tooth base on the circumference of the roller body (8), is equal to or less than the difference Δ of the tooth heights (a, b) of a larger and smaller tooth (4, 5). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Differenz A der Zahnhöhen (a, b) für alle auf dem Umfang des Walzenkörpers (8) verteilten Zahnreihen (2, 3) gleich gross ist.2. Device according to claim 1, characterized in that the difference A of the tooth heights (a, b) is the same for all rows of teeth (2, 3) distributed over the circumference of the roller body (8). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass auf dem Umfang des Walzenkörpers (8) mindestens vierzig, vorzugsweise mindestens sechzig, Zahnreihen (2, 3) gleichmässig verteilt sind.3. Device according to claim 1 or 2, characterized in that on the circumference of the roller body (8) at least forty, preferably at least sixty, rows of teeth (2, 3) are evenly distributed. 4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Stirnfläche der Zähne (4, 5) in Drehrichtung vorwärtsgeneigt ist.4. The device according to claim 1, characterized in that the end face of the teeth (4, 5) is inclined forward in the direction of rotation. 5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Zahnhöhe des grösseren Zahns (4) kleiner als 1 mm ist.5. The device according to claim 1, characterized in that the tooth height of the larger tooth (4) is less than 1 mm. 6. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Verhältnis der Zahnhöhen (a) des grösseren Zahns (4) zu der Zahnhöhe (b) des kleineren Zahns (5) mindestens 2,0, vorzugsweise zwischen 2, 1 und 3,3, ist.6. The device according to claim 1 or 2, characterized in that the ratio of the tooth heights (a) of the larger tooth (4) to the tooth height (b) of the smaller tooth (5) is at least 2.0, preferably between 2, 1 and 3 , 3, is. 7. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Drehzahl der Schneidwalze (1) kleiner als 250 U/min, vorzugsweise kleiner als 150 U/min, ist.7. The device according to claim 1, characterized in that the speed of the cutting roller (1) is less than 250 U / min, preferably less than 150 U / min. 8. Maschine zum Zerkleinern von Dokumentmaterial mit einer Vorrichtung nach Anspruch 1, die in einem Gehäuse (I) eingebaut ist, dadurch gekennzeichnet, dass das Gehäuse (I) einen angenähert vertikal verlaufenden Zuführungsspalt (14) aufweist, dessen eine Seite durch eine Auflagefläche begrenzt ist, an deren innerem Ende die Zahnleiste (13) anschliesst.8. machine for shredding document material with a device according to claim 1, which is installed in a housing (I), characterized in that the housing (I) has an approximately vertically extending feed gap (14), one side of which is delimited by a bearing surface is at the inner end of the rack (13).
EP83102494A 1982-03-30 1983-03-14 Document comminuting device Expired EP0090248B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102494T ATE17661T1 (en) 1982-03-30 1983-03-14 DEVICE FOR SHREDDING DOCUMENT MATERIAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1950/82 1982-03-30
CH1950/82A CH656076A5 (en) 1982-03-30 1982-03-30 DEVICE FOR CRUSHING DOCUMENT MATERIAL.

Publications (3)

Publication Number Publication Date
EP0090248A2 true EP0090248A2 (en) 1983-10-05
EP0090248A3 EP0090248A3 (en) 1984-08-01
EP0090248B1 EP0090248B1 (en) 1986-01-29

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ID=4222382

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EP83102494A Expired EP0090248B1 (en) 1982-03-30 1983-03-14 Document comminuting device

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Country Link
US (1) US4558827A (en)
EP (1) EP0090248B1 (en)
JP (1) JPS58180243A (en)
AT (1) ATE17661T1 (en)
CH (1) CH656076A5 (en)
DE (1) DE3361954D1 (en)

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US4754933A (en) * 1984-12-07 1988-07-05 Gao Gesellschaft Fur Automation Und Organisation Mbh Apparatus for destroying documents such as banknotes
CN112473905A (en) * 2020-11-10 2021-03-12 李河龙 Traditional Chinese medicine pulverizer

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US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine
DE4114793A1 (en) * 1991-05-06 1992-11-12 Klaus Meier Fixed blades for a document shredding machine - are formed from a metal strip mounted by the side of the rotor
US5295633A (en) * 1992-01-13 1994-03-22 Fellowes Manufacturing Company Document shredding machine with stripper and cutting mechanism therefore
SE510873C2 (en) * 1992-06-18 1999-07-05 Masma Ab Apparatus for producing disc-shaped fillers intended for use as damping agents in packaging
US5676321A (en) * 1995-04-03 1997-10-14 Fellowes Mfg. Co. Cutting disk
US5636801A (en) * 1995-08-02 1997-06-10 Fellowes Mfg. Co. One piece molded stripper for shredders
US5655725A (en) * 1995-08-24 1997-08-12 Fellowes Manufacturing Co. Retaining plate for gearing
US5829697A (en) * 1995-08-24 1998-11-03 Fellowes Manufacturing Company Support for cylinders in a paper shredder
DE19626504C2 (en) * 1996-04-04 1998-03-05 Gemeinnuetzige Werkstaetten Gm Cutting device for shredders
US5799887A (en) * 1996-10-24 1998-09-01 Fellowes Mfg. Co. Cutting cylinder for a document shredding machine
DE19739341A1 (en) * 1997-09-09 1999-03-11 Albrecht Fritzsche Cutting shaft, especially for document shredder
DE19934818B4 (en) * 1999-07-24 2004-02-05 Schleicher & Co International Ag System for document destruction
US6938844B2 (en) * 2001-12-26 2005-09-06 Charles A. Castronovo Zero-clearance cutting systems
JP4958038B2 (en) * 2006-12-27 2012-06-20 三和産業株式会社 Shredder equipment
US9463465B2 (en) 2012-09-06 2016-10-11 Charles A. Castronovo Compact high-security destruction machine
RU2737143C1 (en) * 2020-02-26 2020-11-25 Государственное бюджетное образовательное учреждение высшего образования Нижегородский государственный инженерно-экономический университет (НГИЭУ) Loose materials shredder

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US4878626A (en) * 1984-12-07 1989-11-07 Gao Gesellschaft Fur Automation Und Organisation Mbh Apparatus for destroying banknotes
CN112473905A (en) * 2020-11-10 2021-03-12 李河龙 Traditional Chinese medicine pulverizer

Also Published As

Publication number Publication date
DE3361954D1 (en) 1986-03-13
JPS6132064B2 (en) 1986-07-24
US4558827A (en) 1985-12-17
ATE17661T1 (en) 1986-02-15
EP0090248B1 (en) 1986-01-29
EP0090248A3 (en) 1984-08-01
CH656076A5 (en) 1986-06-13
JPS58180243A (en) 1983-10-21

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