EP0441182B1 - Messerwellen-Abstreifvorrichtung für Schriftgutvernichter - Google Patents

Messerwellen-Abstreifvorrichtung für Schriftgutvernichter Download PDF

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Publication number
EP0441182B1
EP0441182B1 EP91100863A EP91100863A EP0441182B1 EP 0441182 B1 EP0441182 B1 EP 0441182B1 EP 91100863 A EP91100863 A EP 91100863A EP 91100863 A EP91100863 A EP 91100863A EP 0441182 B1 EP0441182 B1 EP 0441182B1
Authority
EP
European Patent Office
Prior art keywords
webs
supporting
stripping
injection
disposed
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
EP91100863A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0441182A1 (de
Inventor
Willi Strohmeyer
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.)
Geha Werke GmbH
Original Assignee
Geha Werke GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6399365&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0441182(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Geha Werke GmbH filed Critical Geha Werke GmbH
Publication of EP0441182A1 publication Critical patent/EP0441182A1/de
Application granted granted Critical
Publication of EP0441182B1 publication Critical patent/EP0441182B1/de
Anticipated expiration legal-status Critical
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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
    • B02C2018/0046—Shape or construction of frames, housings or casings
    • 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
    • B02C2018/0069—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents with stripping devices

Definitions

  • the invention relates to a knife shaft stripping device for document shredders, whose one-piece stripping webs are arranged in the cutting unit in the cutting zone between the knives of the knife shafts.
  • scraper webs of such scraper devices prevent in the cutting units that the comminuted material penetrates into the spaces between the knives of the knife shafts and can get stuck there. Fixing the shredded material between the knives of the knife shafts would lead to malfunctions.
  • scraper webs in one piece in the form of a scraper in the form of a scraper.
  • the scraper grids are fastened in the side parts of the cutting unit, in which the bearings of the knife shafts are also arranged.
  • the invention has for its object to simplify the structure of a document shredder and to reduce the number of items.
  • the invention has the characterizing features of claim 1.
  • the scraper bars are made of plastic and are injection-molded in one piece either with an upper housing part or a lower housing part, that the scraper bars are assigned supporting webs which are likewise made of plastic and are injection-molded in one piece with the opposite lower housing part or upper housing part, in the upper housing part and in the lower housing part
  • Storage space are arranged for the knife shafts, and that the stripping webs and the supporting webs are provided with supporting surfaces which lie one on top of the other in the assembled state of the cutting mechanism, such that the stripping webs are supported, a simplified structure of the document shredder is achieved. This makes it possible to reduce the costs for the production of the individual parts, and the assembly costs are also reduced. Surprisingly, it has been shown that it is possible to injection-mold the plastic scraper bars, provided that support bars are arranged which give the scraper bars the required stability.
  • the knife shaft stripping device is designed in such a way that the stripping webs are injection-molded in one piece with the upper housing part and formed like a comb from above between the knives of the knife shafts, and that the supporting webs are injection-molded in one piece with the housing lower part.
  • the upper housing part with the comb-like stripping bars can thus be assembled in a final work step after mounting the knife shafts.
  • the support webs are preferably arranged below the knife shafts, so that they form a support surface for the support surfaces of the wiper webs. This solution is particularly cheap in terms of injection technology.
  • the support surfaces for the scraper webs are advantageously arranged on the sides of the support webs facing the continuous paper. This prevents the continuous paper from being able to press the scraper bars against the respective knife shaft, which would result in malfunctions.
  • An optimal support of the support webs is achieved in that the support surfaces for the scraper webs are arranged at an angle to one another on the sides facing the continuous paper and also on the end faces of the support webs and that the support surfaces of the scraper webs are designed accordingly so that the support surfaces in the assembled state of Cutting unit lie on top of each other. In this way, an exact alignment of the stripping bars parallel to the knife shafts is achieved. For the rest, the effect of the interaction of the wiper webs with the support webs is that the upper housing part in particular is also stiffened.
  • a particularly advantageous embodiment of the invention results if a receptacle for the drive motor and bearing surfaces for the transmission are additionally arranged in the upper housing part and in the lower housing part.
  • Such a receptacle or the bearing surfaces can be easily integrated into the parts by injection molding.
  • 1 denotes a document shredder in which a cutting unit 2 is arranged.
  • the cutting unit 2 has two knife shafts 3, on which are known per se Interlocking knives 4 are arranged for crushing the writing material.
  • a knife shaft stripping device consisting of two rows of stripping bars 5 and supporting bars 6 is arranged.
  • the stripping webs 5 engage in the spaces between the knives 4 of the knife shafts 3 and fill them. This prevents shredded documents from entering these gaps.
  • the scraper webs 5 are comb-shaped and molded in one piece with an upper housing part 7.
  • the support webs 6, as can also be seen in particular from FIG. 3, are injection-molded in one piece with a lower housing part 8.
  • the support webs 6 have continuous support surfaces 9 which, as can be seen in particular from FIG. 2, are arranged at an angle to one another.
  • Corresponding support surfaces 10 are arranged on the stripping bars 5. In the assembled state of the cutting unit 2, i.e. When the upper housing part 7 is placed on the lower housing part 8, the supporting surfaces 9 and 10 lie one on top of the other. As can be seen from FIG.
  • the support surfaces 9 of the scraper webs 5 enclose the support surfaces 10 such that the scraper webs are supported by the support webs 6 in both lateral directions and in the vertical direction. This prevents both a lateral displacement of the scraper webs 5 through the paper and a displacement in the direction of the paper travel perpendicular to the longitudinal axes of the knife shafts 3.
  • a paper inlet shaft 11 is arranged in the upper housing part 7 for feeding the paper to be shredded.
  • bearing surfaces 12 for the knife shafts 3 are arranged in the lower housing part 8. These bearing surfaces 12 are just like the stripping bars 5 and the supporting bars 6 are injected into the lower housing part 8 and the upper housing part 7.
  • bearing surfaces 15 for a gear 16 are also injected into the upper housing part 7 and the lower housing part 8. The drive motor 14 drives the knife shafts 3 via the gear 16.
  • the paper For shredding, the paper, not shown in the drawing, is introduced into the paper inlet shaft 11 and then reaches the knives 4 of the knife shafts 3.
  • the overlapping knives 4 shred the paper, the stripping webs 5 preventing paper from entering the spaces between the knives 4 entry.
  • the shredded paper then passes through a paper channel 17 formed between the stripping bars 5 and supporting bars 6 arranged on both sides into a collecting container, not shown in the drawing. Since the stripping webs 5 are supported by the supporting webs 6, they are fixed in their position despite their design as a flexible plastic part per se. As has surprisingly been shown, it is ensured on the basis of the design according to the invention that the stripping webs 5 remain in their position during the size reduction process. The forces exerted by the paper to be shredded are not sufficient to deform the stripping webs 5 in such a way that malfunctions occur.
  • the advantages already mentioned result from the formation of the scraper webs 5 and the support webs 6 as a plastic part.
  • the individual parts of the document shredder 1 are very easy to assemble in the design according to the invention. According to a particularly advantageous embodiment, it is ultimately only necessary to insert the components into the support webs 6, the bearing surfaces 12 of the knife shafts 3, the receptacle 13 for the drive motor 14 and the bearing surfaces 15 for the gearbox 16, and the upper housing part 7 with to put on the scraper bars 5. The alignment and fixation of the scraper webs 5 takes place automatically on the support surfaces 10 of the support webs 6. The costs for the individual parts are also low, since the upper housing part 7 and the lower housing part 8 are injection-molded in one piece, low.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP91100863A 1990-02-03 1991-01-24 Messerwellen-Abstreifvorrichtung für Schriftgutvernichter Expired - Lifetime EP0441182B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4003222 1990-02-03
DE4003222A DE4003222C1 (el) 1990-02-03 1990-02-03

Publications (2)

Publication Number Publication Date
EP0441182A1 EP0441182A1 (de) 1991-08-14
EP0441182B1 true EP0441182B1 (de) 1993-08-18

Family

ID=6399365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91100863A Expired - Lifetime EP0441182B1 (de) 1990-02-03 1991-01-24 Messerwellen-Abstreifvorrichtung für Schriftgutvernichter

Country Status (4)

Country Link
US (1) US5230477A (el)
EP (1) EP0441182B1 (el)
JP (1) JPH0669540B2 (el)
DE (2) DE4003222C1 (el)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine
US5538194A (en) * 1990-03-17 1996-07-23 Schleicher & Co. International Aktiengesellschaft Document shredder
DE4008654C2 (de) * 1990-03-17 1996-02-22 Schleicher & Co Int Dokumentenvernichter und Behälter als Unterkonstruktion dafür
DE4106792C1 (el) * 1991-03-04 1992-08-27 Geha-Werke Gmbh, 3000 Hannover, De
DE4123293A1 (de) * 1991-07-13 1993-01-21 Schwelling Hermann Abstreiferkamm, insbesondere fuer klein-aktenvernichter
US5295633A (en) * 1992-01-13 1994-03-22 Fellowes Manufacturing Company Document shredding machine with stripper and cutting mechanism therefore
US5511732A (en) * 1994-12-28 1996-04-30 Fellowes Manufacturing Company Document shredding machine with continuous stripper
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
DE19545087C2 (de) * 1995-12-04 2003-06-12 Hermann Schwelling Klein-Aktenvernichter
DE19610048A1 (de) 1996-03-14 1997-09-18 Schleicher & Co Int Schriftgutvernichter
US5799887A (en) * 1996-10-24 1998-09-01 Fellowes Mfg. Co. Cutting cylinder for a document shredding machine
US5826809A (en) * 1997-04-30 1998-10-27 Fellowes Manufacturing Company Support for cutting cylinders in a paper shredder
US5961059A (en) * 1997-04-30 1999-10-05 Fellowes Manufacturing Company Support for drive system in a paper shredder
US5954280A (en) * 1998-05-12 1999-09-21 Fellowes Manufacturing Company Top blocker for a paper shredder
US5988542A (en) * 1998-05-18 1999-11-23 General Binding Corporation Document shredding devices
EP1016461B1 (de) 1998-12-18 2003-05-14 Hermann Schwelling Schneidwerk für Aktenvernichter
WO2004011151A1 (en) * 2002-07-26 2004-02-05 Innodesk Business Tools, Inc. Portable hand-held paper shredder
US20050279869A1 (en) * 2004-06-16 2005-12-22 Kevin Barklage Portable shredder
US20060049291A1 (en) * 2004-09-08 2006-03-09 Rajewski David E Blade system for a shredding apparatus
US20110180640A1 (en) * 2010-01-22 2011-07-28 Felipe Angel Paper edge shredding device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3033064A (en) * 1959-01-12 1962-05-08 Filemon T Lee Support and stripper for cutter head in a paper shredding machine
FR1403624A (fr) * 1963-05-04 1965-06-25 Dispositif économique pour détruire les documents
DE1511166C3 (de) * 1966-03-22 1973-10-18 Feinwerktechnik Schleicher & Co, 7778 Markdorf Gerät zum Zerschneiden von Schriftstücken in schmale Streifen
US3724766A (en) * 1971-05-14 1973-04-03 Ketcham & Mcdougall Shredder
JPS5551449A (en) * 1978-10-11 1980-04-15 Takeshi Hatanaka Motor desk shredder
EP0010681B1 (de) * 1978-10-19 1982-04-14 Günter Trautmann Vorrichtung zum Zerschneiden oder Zerkleinern von Papier, Karton, Mikrofilmen od. dgl
GB2096919B (en) * 1981-03-11 1984-12-05 Matsushita Electric Ind Co Ltd Shredder
DE3616554C2 (de) * 1986-05-16 1995-05-24 Schleicher Co Feinwerktech Messerwalzen-Abstreifvorrichtung für Aktenvernichter oder dgl.
US4997134A (en) * 1990-01-16 1991-03-05 Group Four Design Document shredding machine and method
US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine

Also Published As

Publication number Publication date
DE4003222C1 (el) 1991-04-18
US5230477A (en) 1993-07-27
EP0441182A1 (de) 1991-08-14
JPH0669540B2 (ja) 1994-09-07
DE59100296D1 (de) 1993-09-23
JPH0623289A (ja) 1994-02-01

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