EP0792691B1 - Déchiqueteur avec capteur mécanique - Google Patents

Déchiqueteur avec capteur mécanique Download PDF

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Publication number
EP0792691B1
EP0792691B1 EP97101495A EP97101495A EP0792691B1 EP 0792691 B1 EP0792691 B1 EP 0792691B1 EP 97101495 A EP97101495 A EP 97101495A EP 97101495 A EP97101495 A EP 97101495A EP 0792691 B1 EP0792691 B1 EP 0792691B1
Authority
EP
European Patent Office
Prior art keywords
guide surface
operating member
operating
mechanical means
cutting
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 - Lifetime
Application number
EP97101495A
Other languages
German (de)
English (en)
Other versions
EP0792691A1 (fr
Inventor
Stephen Christopher Watkins
Paul Arthur Aries
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.)
Acco Rexel Group Services Ltd
Original Assignee
Acco Rexel Group Services Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Acco Rexel Group Services Ltd filed Critical Acco Rexel Group Services Ltd
Publication of EP0792691A1 publication Critical patent/EP0792691A1/fr
Application granted granted Critical
Publication of EP0792691B1 publication Critical patent/EP0792691B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B02C2018/0023—Switching devices

Definitions

  • This invention relates to an operating means for a shredding machine.
  • Shredding machines such as paper shredders conventionally comprise a housing comprising a cutting mechanism, conventionally comprising two rotatable cutting shafts closely adjacent one another, there being defined a gap therebetween into which paper or other material to be shredded (hereinafter to be referred to as "paper" for convenience) may be fed when shredding is required.
  • a shredding machine is hereinafter referred to as being of the kind specified.
  • the cutting shafts are generally powered by an electric motor and it is desirable that operation of the motor be controlled in a manner such that a shredding operation is automated as much as possible.
  • paper shredders now comprise an electronic sensor, for example a photo-electric sensor, located at a position adjacent a duct through which paper is passed prior to engagement with the cutting rollers, and which causes the motor to operate when paper is sensed.
  • an electronic sensor for example a photo-electric sensor
  • a timing means is often provided in conjunction with the sensor such that when the paper has passed the sensor the motor continues to operate for a preset time thereafter, such that all the paper is shredded and none is left protruding from the nip when the motor stops.
  • a shredding machine and operating means comprising first and second mechanical switches as in the preambles of claims 1 and 10 are known from DE-A-20 45 280.
  • a shredding machine comprising a housing, a cutting mechanism comprising two rotatable cutting shafts closely adjacent one another, adapted to shred material as the material is passed through a shredding gap between them, an inlet to guide the material to the shredding gap and a motor to cause rotation of the cutting shafts, first mechanical means adjacent to the inlet which is responsive to the presence of material to be shredded to move to an operative position in which power is supplied to the motor, the first mechanical means adopting an inoperative position in the absence of such material, and second mechanical means operative to delay cessation of the supply of power to the motor when the first mechanical means adopts its inoperative position, characterised in that the second mechanical means includes an operating member which bears upon a guide surface associated with one of the cutting shafts.
  • the first mechanical means comprises a sensing member which is physically moved to its operative position by paper in the inlet.
  • the second mechanical means is operative on most occasions to delay cessation, but not need be so operative on all occasions.
  • the second mechanical means may comprise a second sensing member moved to a closed position (corresponding to the supply of power to the motor) during the majority part of a cycle of the machine, for example being controlled by the drive shaft of the machine, or another member which rotates during operation of the machine.
  • an operating means for a shredding machine of the kind comprising a housing, a cutting mechanism comprising two rotatable cutting shafts closely adjacent one another, adapted to shred material as the material is passed through a shredding gap between them, an inlet which guides the material to the shredding gap, and a motor to cause rotation of the cutting shafts, the operating means comprising first and second mechanical means moveable between inoperative and operative positions to control supply of power to the motor, the first mechanical means being moveable by contact with the material, characterised in that the second mechanical means has an operating member which is adapted to bear upon a guide surface associated with one of the cutting shafts.
  • the first and second mechanical means are conveniently arranged such that movement of one or both of the mechanical means to an operative position causes power to be supplied to the motor such that the cutting shafts rotate.
  • the first mechanical means is operable through contact with the paper such that when paper is brought into contact with the first switching means, the first mechanical means is moved to an operative position, and power is supplied to the motor.
  • the first mechanical means comprises a lever or other suitable member linked to a microswitch having a sensitivity suitable for such movement to be permitted.
  • the lever is preferably located near the inlet but away from the shredding gap such that the microswitch is closed and power is supplied to the motor before any part of the paper enters the shredding gap.
  • the lever is pivotally mounted, having a first end in a path of the paper and a second end associated with the microswitch.
  • the operating member of the second mechanical means bears upon a guide surface attached to or integral with one of the cutting shafts, such a guide surface being for example, a disc or plate.
  • the operating member is also preferably pivotable, and may be pivotable about the same pivot point as the lever of the first mechanical means.
  • the guide surface preferably has a configuration such that on rotation of the shaft, the operating member bearing upon the guide surface is displaced relative to and away from the axis of the shaft, preferably in a direction generally perpendicular to the axis. Accordingly, the guide surface may be of cam like configuration such that rotation of the shaft induces reciprocation in the operating member relative to the shaft, which in turn causes a microswitch associated with the operating member to move between inoperative and operative positions.
  • the operating member of the second mechanical means may bear directly on the associated microswitch, but there may be provided an additional member associated with and pivotable with the operating member, which causes opening and closing of the associated microswitch.
  • the guide surface is contoured when viewed in cross-section to provide a first part adapted to displace the operating member in a first direction to cause the associated microswitch to close, and a second part adapted to displace the operating member in a second direction to cause the microswitch to open or to permit the microswitch to open.
  • the length of the first part is greater than the length of the second part, such that the operating member is displaced in the first direction for a greater proportion of the time taken to complete one revolution of the cutting shaft than it is displaced in the second direction.
  • the ratio of length of the first part to the second part is at least 3:1, preferably greater than 4:1.
  • the guide surface is generally circular in cross-section, but having a generally chordal linear portion, the curved surface corresponding to the first part, and the generally chordal linear portion corresponding to the second part.
  • the operating member is resiliently biased towards the guide surface, such that the operating member remains in good contact with the guide surface.
  • the first and second mechanical means may comprise separate microswitches which are arranged in a supply circuit in parallel, such that if either of the microswitches is closed, power is supplied to the electric motor.
  • the first and second mechanical means share a common microswitch, such that the microswitch may be closed by the operating member of either of said mechanical means, to cause power to be supplied to the electric motor.
  • the guide surface also rotates and displaces the operating member in a reciprocating manner. Since the first and second mechanical means are in parallel relationship with each other, the mircroswitch of the second mechanical means may be opened when the operating member bears upon the second part of the guide surface, but power is maintained to the motor by virtue of the first mechanical means, provided that paper is maintained in contact with the lever of the first mechanical means.
  • the associated microswitch opens, but there is a relatively high probability (at least 3:1) that the operating member of the second mechanical means will at that point be bearing on the first part of the guide surface, since the length of the first part is considerably greater than the second part.
  • the microswitch opens and the power supply to the motor is stopped.
  • the relative lengths of the first and second parts of the guide surface are such that momentum of the cutting shaft carrying the guide surface is insufficient to cause the shaft to rotate, after power to the motor has been stopped, from a position where the operating member bears upon the second part to a position where the operating member bears upon the first part. Accordingly, the cutting shaft always comes to rest at similar rotational positions.
  • the microswitch may arranged in circuitry which is operative to effectively connect a resistance wire between the terminals of the motor when it moves to its open position, thus causing the electric motor to operate as a generator, and applying regenerative braking, causing the shafts to cease rotation more quickly than would be the case were the electric motor circuitry simply to be opened. It will be appreciated however, that the resistance should not be too high, since in such a case, the regenerative braking effect would be insufficient to bring the motor to rest before the operating member again bears upon the first part of the guide surface, thus closing the switch and resuming supply of power to the motor.
  • a paper shredder 10 comprising a housing 11, in which there is provided an inlet duct 12 to enable paper to be fed to a shredding gap 13 between cutting shaft 14 and 15.
  • the cutting shafts are powered in generally conventional manner by an electric motor (not shown), there being provided an operating means having a first, mechanical switching means 17 comprising an operating member 20 and a second, mechanical switching means 18 comprising an operating member 19.
  • the first switching means 17 is mechanically operable through contact of paper and is located between the inlet duct 12 and the shredding gap 13 such that when paper is introduced through the inlet duct towards the shredding gap, the paper bears upon a member 20, conveniently afforded by a lever pivotable about a pivot point 21, which induces movement of the lever to close the microswitch 16 at button 16a and accordingly allows power to be supplied to the motor.
  • the operating member 19 is preferably also afforded by a lever which pivots about pivot point 21, and bears upon a guide surface 24 which is attached to axle 25 of the first cutting shaft 14.
  • the guide surface is generally circular in cross-section, having a generally curved portion 26 and a generally chordal linear portion 27 whose length is considerably less than that of the curved portion 26.
  • both the operating member 20 of the first switching means 17, and the operating member 19 of the second switching means 18 are arranged to operate on the same microswitch 16.
  • the microswitch may be closed either by the action of the operating member 20, caused by the introduction of paper into the inlet duct 12 of the machine, or by the operating member 19 caused by the engagement between the operating member 19 and the surface 24 of the axle 25.
  • the microswitch will be maintained closed as long as the operating member 19 is in contact with the guide surface 24.
  • microswitches for the two switching means may be utilised, the two microswitches being wired in parallel.
  • the circuit may be such that when the microswitch is opened.
  • an electrically conductive bridge comprising a resistance wire between the live and neutral terminals thereof, causing continued rotation of the electric motor under the impetus of its momentum to act as a generator, and thus causing the electric motor to cease rotation more quickly than would be the case were the circuit simply opened.
  • the shredder provides advantages over those currently known since the switching means are both purely mechanical, with no photo-electric or other electronic sensors being required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Claims (23)

  1. Machine à déchiqueter (10), comprenant un boítier (11), un mécanisme de coupe comprenant deux arbres de coupe rotatifs (14, 15) proches et adjacents l'un à l'autre, adaptés à déchiqueter un matériau tandis que ce matériau traverse un intervalle de déchiquetage (13) entre eux, une entrée (12) pour guider le matériau vers l'intervalle de déchiquetage (13) et un moteur pour entraíner la rotation des arbres de coupe, des premiers organes mécaniques (17) adjacents à l'entrée et qui réagissent à la présence de matériau à déchiqueter pour se déplacer vers une position de fonctionnement dans laquelle l'électricité est fournie au moteur, les premiers organes mécaniques (17) adoptant une position de non-fonctionnement en l'absence de matériau, et des seconds organes mécaniques (18) dont la fonction est de retarder la coupure de l'alimentation d'électricité au moteur lorsque les premiers organes mécaniques adoptent leur position de non-fonctionnement ; caractérisée en ce que les seconds moyens mécaniques (18) incluent un élément fonctionnel (19) qui vient porter sur une surface de guidage (24) associée à l'un des arbres de coupe (14, 15).
  2. Machine à déchiqueter (10) selon la revendication 1, dans laquelle la surface de guidage (24) a une configuration analogue à une came, de sorte que sa rotation induit un mouvement de va-et-vient dans l'élément fonctionnel (19).
  3. Machine à déchiqueter (10) selon l'une ou l'autre des revendications 1 et 2, dans laquelle la surface de guidage (24) comprend une première partie (26) adaptée à déplacer l'élément fonctionnel (19) dans une première direction pour provoquer la fermeture d'un microrupteur associé (16), et une deuxième partie (27) adaptée à déplacer l'élément fonctionnel (19) dans une deuxième direction pour provoquer l'ouverture du microrupteur associé (16), ou pour permettre l'ouverture du microrupteur associé (16).
  4. Machine à déchiqueter (10) selon la revendication 3, dans laquelle la longueur de la première partie (26) de la surface de guidage (24) est supérieure à la longueur de la deuxième partie (27) de la surface de guidage (24), de sorte que l'élément fonctionnel (19) est déplacé dans la première direction pendant une plus grande proportion du temps nécessaire pour compléter une rotation de l'arbre de coupe (14,15) sur lequel il vient porter, que le temps pendant lequel il est déplacé dans la deuxième direction.
  5. Machine à déchiqueter (10) selon la revendication 4, dans laquelle le rapport entre la longueur de la première partie (26) et celle de la deuxième partie (27) est au moins 3:1.
  6. Machine à déchiqueter (10) selon l'une quelconque des revendications précédentes, dans laquelle la surface de guidage (24) est généralement circulaire, mais en ce qu'elle comporte également une partie linéaire (27) constituant généralement une corde.
  7. Machine à déchiqueter (10) selon l'une quelconque des revendications précédentes, dans laquelle la surface de guidage (24) est attachée ou intégrée à l'un des arbres de coupe (14, 15).
  8. Machine à déchiqueter (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément fonctionnel (19) est capable de pivoter.
  9. Machine à déchiqueter (10) selon la revendication 8, dans laquelle les premiers moyens mécaniques (17) comprennent un levier (20) monté en pivotement, et dans laquelle le levier (20) capable de pivoter autour du même point de pivotement que l'élément fonctionnel (19).
  10. Organes de commande pour une machine à déchiqueter (10) du type comprenant un boítier (11), un mécanisme de coupe comprenant deux arbres de coupe rotatifs (14, 15) proches et adjacents l'un à l'autre, adaptés à déchiqueter un matériau tandis que ce matériau passe à travers un intervalle de déchiquetage (13) entre eux, une entrée (12) qui guide le matériau vers l'intervalle de déchiquetage, et un moteur pour entraíner la rotation des arbres de coupe (14, 15), lesdits organes de commande comprenant des premiers et des seconds organes mécaniques (17, 18) mobiles entre une position de fonctionnement et une position de non-fonctionnement pour commander l'alimentation d'électricité au moteur, les premiers organes mécaniques (17) étant mobiles par contact avec le matériau, caractérisés en ce que les seconds organes mécaniques (18) comprennent un élément fonctionnel (19) qui est adapté à venir porter sur une surface de guidage (24) associée à l'un des arbres de coupe (14, 15).
  11. Organes de commande selon la revendication 10, dans lesquels les premiers et les seconds organes mécaniques (17, 18) sont ainsi agencés que le mouvement de l'un des organes mécaniques ou des deux vers une position de fonctionnement provoque l'alimentation d'électricité au moteur, de sorte que les arbres de coupe (14, 15) tournent.
  12. Organes de commande selon l'une ou l'autre des revendications 10 et 11, dans lesquels les premiers organes mécaniques (17) comprennent un levier (20) relié à un microrupteur (16), et dans lesquels il est prévu des guides adjacents au levier (20) pour contraindre le matériau en vue d'un mouvement en direction du levier (20) afin d'assurer que le passage de matériau le long du levier (20) ferme le microrupteur associé (16).
  13. Organes de commande selon l'une quelconque des revendications 10 à 12, dans lesquelles la surface de guidage (24) est attachée ou intégrée à l'un des arbres de coupe (14, 15).
  14. Organes de commande selon la revendication 13, dans lesquels l'élément de guidage (24) fait partie d'un disque ou d'une plaque.
  15. Organes de commande selon l'une quelconque des revendications 10 à 14, dans lesquels l'élément fonctionnel (19) des seconds organes mécaniques (18) est capable de pivoter.
  16. Organes de commande selon l'une quelconque des revendications 12 à 15, dans lesquels l'élément fonctionnel (19) des seconds organes mécaniques (18) est capable de pivoter autour du même point de pivotement que le levier (20) des premiers organes de commutation (17).
  17. Organes de commande selon l'une quelconque des revendications 10 à 16, dans lesquels la surface de guidage (24) a une configuration telle que lors de la rotation de l'arbre de coupe associé (14, 15), l'élément fonctionnel (19) qui porte sur la surface de guidage (24) est déplacé en rapprochement et en éloignement de l'axe de l'arbre de coupe (14, 15).
  18. Organes de commande selon la revendication 17, dans lesquels la surface de guidage (24) a une configuration analogue à une came, de sorte que la rotation de l'arbre de coupe (14,15) induit un mouvement de va-et-vient de l'élément fonctionnel (19) par rapport à l'arbre de coupe (14, 15).
  19. Organes de commande selon l'une quelconque des revendications 10 à 18, dans lesquels la surface de guidage (24) est conformée, lorsqu'on l'observe en section transversale, de manière à présenter une première partie (26) adaptée à déplacer l'élément fonctionnel (19) dans une première direction pour provoquer la fermeture d'un microrupteur associé (16), et une deuxième partie (27) adaptée à déplacer l'élément fonctionnel (19) dans une deuxième direction pour provoquer l'ouverture du microrupteur associé (16), ou autoriser l'ouverture du microrupteur associé (16).
  20. Organes de commande selon la revendication 19, dans lesquels la longueur de la première partie (26) de la surface de guidage (24) est supérieure à la longueur de la deuxième partie (27) de la surface de guidage (24), de sorte que l'élément fonctionnel (19) est déplacé dans la première direction pendant une proportion supérieure du temps nécessaire pour compléter une révolution de l'arbre de coupe associé (14, 15) que le temps pendant lequel il est déplacé dans la deuxième direction.
  21. Organes de commande selon la revendication 20, dans lesquels le rapport entre la longueur de la première partie (26) et celle de la deuxième partie (27) est au moins 3:1.
  22. Organes de commande selon l'une quelconque des revendications 10 à 21, dans lesquels la surface de guidage (24) présente une section transversale généralement circulaire, mais elle comporte également une partie linéaire (27) formant généralement une corde.
  23. Organes de commande selon l'une quelconque des revendications 10 à 22, dans lesquels l'élément fonctionnel (19) est repoussé de façon élastique vers la surface de guidage (24).
EP97101495A 1996-01-30 1997-01-30 Déchiqueteur avec capteur mécanique Expired - Lifetime EP0792691B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9601843.7A GB9601843D0 (en) 1996-01-30 1996-01-30 Shredder with mechanical sensosr
GB9601843 1996-01-30

Publications (2)

Publication Number Publication Date
EP0792691A1 EP0792691A1 (fr) 1997-09-03
EP0792691B1 true EP0792691B1 (fr) 2002-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97101495A Expired - Lifetime EP0792691B1 (fr) 1996-01-30 1997-01-30 Déchiqueteur avec capteur mécanique

Country Status (4)

Country Link
EP (1) EP0792691B1 (fr)
AT (1) ATE216285T1 (fr)
DE (1) DE69711973T2 (fr)
GB (1) GB9601843D0 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7946514B2 (en) 2004-09-10 2011-05-24 Fellowes, Inc. Shredder with thickness detector
US7954737B2 (en) 2007-10-04 2011-06-07 Fellowes, Inc. Shredder thickness with anti-jitter feature
US8091809B2 (en) 2009-03-24 2012-01-10 Fellowes, Inc. Shredder with jam proof system
CN102458663A (zh) * 2009-06-18 2012-05-16 斐乐公司 用于碎纸机的限制性喉部机构
US8201761B2 (en) 2009-01-05 2012-06-19 Fellowes, Inc. Thickness sensor based motor controller
US8205815B2 (en) 2009-05-15 2012-06-26 Fellowes, Inc. Paper alignment sensor arrangement
US8382019B2 (en) 2010-05-03 2013-02-26 Fellowes, Inc. In-rush current jam proof sensor control
US8430347B2 (en) 2009-01-05 2013-04-30 Fellowes, Inc. Thickness adjusted motor controller
US8511593B2 (en) 2010-05-28 2013-08-20 Fellowes, Inc. Differential jam proof sensor for a shredder
US8550387B2 (en) 2009-06-18 2013-10-08 Tai Hoon K. Matlin Restrictive throat mechanism for paper shredders
US8672247B2 (en) 2005-07-11 2014-03-18 Fellowes, Inc. Shredder with thickness detector
US8870106B2 (en) 2004-09-10 2014-10-28 Fellowes, Inc. Shredder with thickness detector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19757766A1 (de) * 1997-12-23 1999-06-24 Hermann Schwelling Vorrichtung zur verzögerten Antriebsabschaltung von Aktenvernichter-Schneidwerken
GB9919439D0 (en) * 1999-08-18 1999-10-20 Acco Rexel Group Serv Ltd Shredding machine

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DE2045280C3 (de) * 1970-09-14 1980-09-25 Adolf 7460 Balingen Ehinger Vorrichtung zum Vernichten von Akten
DE4103950C1 (fr) * 1991-02-09 1992-04-23 Geha-Werke Gmbh, 3000 Hannover, De
SI9200354A (en) * 1991-12-13 1993-06-30 Michael Lopic Portable cutting apparatus

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7946514B2 (en) 2004-09-10 2011-05-24 Fellowes, Inc. Shredder with thickness detector
US8870106B2 (en) 2004-09-10 2014-10-28 Fellowes, Inc. Shredder with thickness detector
US7963468B2 (en) 2004-09-10 2011-06-21 Fellowes, Inc. Shredder with thickness detector
US8783592B2 (en) 2004-09-10 2014-07-22 Fellowes, Inc. Shredder with thickness detector
US8672247B2 (en) 2005-07-11 2014-03-18 Fellowes, Inc. Shredder with thickness detector
US8757526B2 (en) 2005-07-11 2014-06-24 Fellowes, Inc. Shredder with thickness detector
USRE44161E1 (en) 2005-07-11 2013-04-23 Fellowes, Inc. Shredder with thickness detector
US8113451B2 (en) 2007-10-04 2012-02-14 Fellowes, Inc. Shredder thickness with anti-jitter feature
US8020796B2 (en) 2007-10-04 2011-09-20 Fellowes, Inc. Shredder thickness with anti-jitter feature
US9044759B2 (en) 2007-10-04 2015-06-02 Fellowes, Inc. Shredder thickness with anti-jitter feature
US8424787B2 (en) 2007-10-04 2013-04-23 Fellowes, Inc. Shredder thickness with anti-jitter feature
US8464767B2 (en) 2007-10-04 2013-06-18 Fellowes, Inc. Shredder thickness with anti-jitter feature
US8500049B2 (en) 2007-10-04 2013-08-06 Fellowes, Inc. Shredder thickness with anti-jitter feature
US7954737B2 (en) 2007-10-04 2011-06-07 Fellowes, Inc. Shredder thickness with anti-jitter feature
US8201761B2 (en) 2009-01-05 2012-06-19 Fellowes, Inc. Thickness sensor based motor controller
US8430347B2 (en) 2009-01-05 2013-04-30 Fellowes, Inc. Thickness adjusted motor controller
US8091809B2 (en) 2009-03-24 2012-01-10 Fellowes, Inc. Shredder with jam proof system
US8205815B2 (en) 2009-05-15 2012-06-26 Fellowes, Inc. Paper alignment sensor arrangement
CN102458663A (zh) * 2009-06-18 2012-05-16 斐乐公司 用于碎纸机的限制性喉部机构
US8678305B2 (en) 2009-06-18 2014-03-25 Fellowes, Inc. Restrictive throat mechanism for paper shredders
US8550387B2 (en) 2009-06-18 2013-10-08 Tai Hoon K. Matlin Restrictive throat mechanism for paper shredders
CN102458663B (zh) * 2009-06-18 2014-08-27 斐乐公司 切碎机以及用于操作切碎机的方法
US8382019B2 (en) 2010-05-03 2013-02-26 Fellowes, Inc. In-rush current jam proof sensor control
US8511593B2 (en) 2010-05-28 2013-08-20 Fellowes, Inc. Differential jam proof sensor for a shredder

Also Published As

Publication number Publication date
ATE216285T1 (de) 2002-05-15
EP0792691A1 (fr) 1997-09-03
DE69711973T2 (de) 2003-01-16
GB9601843D0 (en) 1996-04-03
DE69711973D1 (de) 2002-05-23

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