US3921920A - Machine for destroying documents - Google Patents

Machine for destroying documents Download PDF

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Publication number
US3921920A
US3921920A US461940A US46194074A US3921920A US 3921920 A US3921920 A US 3921920A US 461940 A US461940 A US 461940A US 46194074 A US46194074 A US 46194074A US 3921920 A US3921920 A US 3921920A
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US
United States
Prior art keywords
shafts
machine
cutters
cutting tools
shreds
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
US461940A
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English (en)
Inventor
Huguette Brocard
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Individual
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Individual
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Filing date
Publication date
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Publication of US3921920A publication Critical patent/US3921920A/en
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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
    • B02C2018/0069—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents with stripping devices

Definitions

  • ABSTRACT Machine for destroying documents, of the kind which contains two parallel shafts driving cutting discs or cutting tools engaging one another, characterized in that there is used two pairs of shafts equipped with cutting tools, said pairs of shafts being disposed one above the other, and a means is introduced between them to pivot the shreds cut out by the upper cutting tools in such a way that said shreds will fall in a substantially horizontal direction of the lower cutting tools.
  • the present invention relates to a machine for destroying documents, of the type which permits cutting documents into shreds.
  • Such machines are generally constituted by two series of cutting discs, or cutting tools, mounted on a shaft driven by a mechanical means with the discs in one series engaging between the discs of the other series, and each disc rotating between guides integral with the frame of the machine.
  • the present invention relates to a machine which, aside from the fact that it can have high efficiency, guarantees the total destruction of the document, and it is remarkable in that it contains two shafts provided with cutting tools, and below then, a second, indentical device, and a means being provided between these two devices so that the shreds produced by the upper device will pivot by substantially 90 in such a way as to be placed horizontally, before falling onto the cutting tools on the lower device.
  • FIG. 1 is a diagrammatic sectional view of the machine, made through a vertical plane perpendicular to the plane of the cutters, and,
  • FIG. 2 is a diagrammatic partial side view of FIG. 1.
  • the machine is composed of two parallel means, and on which are keyed cutting tools 3 and 4 with cutters 3 engaging between cutters 4.
  • crossbraces 5, held by rods 6, are inserted between the cutters.
  • the above device as a whole constitutes an ordinary machine for cutting documents into shreds or strips.
  • this first device is disposed in a frame, shown at 7, above a similar device containing two shafts 8 and 9. cutters 10-11, and crossbraces 12 held by rods 13.
  • Shafts l, 2, 8 and 9 rotate according to arrows F and F2.
  • the said means can be constituted by a rotary spiral screw 14. It should be noted that the axis of the screw is offset with respect to the vertical plane of symmetry X-Y of the apparatus.
  • Machine for destroying documents comprising, in combination, a first device constituted by two driven shafts to be driven in rotation in opposite directions to one another, cutters being mounted on said shafts, the cutters on one of said shafts interlocking between the cutters on the other of said shafts, a second device similar to and disposed below said first device, and a rotary driven spiral screw disposed between said two devices with the axis of said screw being parallel to those of said shafts of said two devices.
  • Machine for destroying documents according to claim 1, in which the axis of said screw is offset with respect to the vertical plane of the machine.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Nonmetal Cutting Devices (AREA)
US461940A 1973-04-27 1974-04-18 Machine for destroying documents Expired - Lifetime US3921920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7315282A FR2227054B3 (enrdf_load_stackoverflow) 1973-04-27 1973-04-27

Publications (1)

Publication Number Publication Date
US3921920A true US3921920A (en) 1975-11-25

Family

ID=9118558

Family Applications (1)

Application Number Title Priority Date Filing Date
US461940A Expired - Lifetime US3921920A (en) 1973-04-27 1974-04-18 Machine for destroying documents

Country Status (3)

Country Link
US (1) US3921920A (enrdf_load_stackoverflow)
JP (1) JPS5013984A (enrdf_load_stackoverflow)
FR (1) FR2227054B3 (enrdf_load_stackoverflow)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068805A (en) * 1976-11-05 1978-01-17 Fred Oswald Shredding machine
US4124169A (en) * 1977-05-06 1978-11-07 Takefumi Hatanaka Document shredder
US4192467A (en) * 1977-05-06 1980-03-11 Takefumi Hatanaka Document shredder
DE2941149A1 (de) * 1978-10-11 1980-04-17 Takefumi Hatanaka Aktenwolf
US4200239A (en) * 1978-07-14 1980-04-29 Wright Line Inc. Machine that quadrates documents
US4230282A (en) * 1977-07-04 1980-10-28 Moco Maschinen- Und Apparatebau Gmbh & Co. Kg Comminuting plant
US4729515A (en) * 1984-09-04 1988-03-08 Wagner John W Machine for cutting disposable containers
US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine
US5295633A (en) * 1992-01-13 1994-03-22 Fellowes Manufacturing Company Document shredding machine with stripper and cutting mechanism therefore
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
US5676321A (en) * 1995-04-03 1997-10-14 Fellowes Mfg. Co. Cutting disk
US5829697A (en) * 1995-08-24 1998-11-03 Fellowes Manufacturing Company Support for cylinders in a paper shredder
US5954280A (en) * 1998-05-12 1999-09-21 Fellowes Manufacturing Company Top blocker for a paper shredder
EP1285697A1 (en) * 2001-08-20 2003-02-26 Schleicher & Co. of America, Inc. Document shredder for cutting flat material
EP1334771A1 (de) * 2002-02-06 2003-08-13 Hermann Schwelling Aktenvernichter
WO2003066222A1 (de) * 2002-02-06 2003-08-14 Hermann Schwelling Feinschnitt-schneidwerk für aktenvernichter
US20030201353A1 (en) * 2002-01-03 2003-10-30 David Lefrancois Dual-path office product disintegrator
RU2223823C1 (ru) * 2002-09-04 2004-02-20 Бахтинов Николай Алексеевич Центробежная роторная мельница
US20120006920A1 (en) * 2010-07-08 2012-01-12 Shred-It International Inc. Staged paper shredder
EP2316574A3 (de) * 2009-10-27 2012-03-14 Hermann Schwelling Verfahren zum Verhindern der Lesbarkeit von auf Festplatten gespeicherten Daten sowie Vorrichtung für die Zerkleinerung von Festplatten
CN103611607A (zh) * 2013-11-25 2014-03-05 张忠义 一种涉密电子信息载体销毁设备及销毁方法
US20180361389A1 (en) * 2017-06-16 2018-12-20 Stephen Kwok Ki Chan Paper shredder
US11878307B2 (en) * 2019-11-27 2024-01-23 Seiko Epson Corporation Coarse crushing device and fiber treatment apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6044144A (ja) * 1983-08-18 1985-03-09 Mitsubishi Heavy Ind Ltd 静水圧加圧装置用プレス枠の製造法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1090914A (en) * 1912-03-06 1914-03-24 Fritz Gueettler Paper-comminuting machine.
US1340225A (en) * 1919-08-20 1920-05-18 United Shoe Machinery Corp Method of cutting sheet material
US3630460A (en) * 1968-11-09 1971-12-28 Albert Goldhammer Paper shredder
US3713358A (en) * 1971-06-30 1973-01-30 Celanese Corp Apparatus and process for severing flexible sheet materials
US3727850A (en) * 1971-04-16 1973-04-17 C Krigbaum Scrap rubber shredding device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1090914A (en) * 1912-03-06 1914-03-24 Fritz Gueettler Paper-comminuting machine.
US1340225A (en) * 1919-08-20 1920-05-18 United Shoe Machinery Corp Method of cutting sheet material
US3630460A (en) * 1968-11-09 1971-12-28 Albert Goldhammer Paper shredder
US3727850A (en) * 1971-04-16 1973-04-17 C Krigbaum Scrap rubber shredding device
US3713358A (en) * 1971-06-30 1973-01-30 Celanese Corp Apparatus and process for severing flexible sheet materials

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068805A (en) * 1976-11-05 1978-01-17 Fred Oswald Shredding machine
US4124169A (en) * 1977-05-06 1978-11-07 Takefumi Hatanaka Document shredder
US4192467A (en) * 1977-05-06 1980-03-11 Takefumi Hatanaka Document shredder
US4230282A (en) * 1977-07-04 1980-10-28 Moco Maschinen- Und Apparatebau Gmbh & Co. Kg Comminuting plant
US4200239A (en) * 1978-07-14 1980-04-29 Wright Line Inc. Machine that quadrates documents
DE2941149A1 (de) * 1978-10-11 1980-04-17 Takefumi Hatanaka Aktenwolf
US4729515A (en) * 1984-09-04 1988-03-08 Wagner John W Machine for cutting disposable containers
US5071080A (en) * 1990-02-27 1991-12-10 Fellowes Manufacturing Company Document shredding machine
US5295633A (en) * 1992-01-13 1994-03-22 Fellowes Manufacturing Company Document shredding machine with stripper and cutting mechanism therefore
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
US5829697A (en) * 1995-08-24 1998-11-03 Fellowes Manufacturing Company Support for cylinders in a paper shredder
US5655725A (en) * 1995-08-24 1997-08-12 Fellowes Manufacturing Co. Retaining plate for gearing
US5954280A (en) * 1998-05-12 1999-09-21 Fellowes Manufacturing Company Top blocker for a paper shredder
EP1285697A1 (en) * 2001-08-20 2003-02-26 Schleicher & Co. of America, Inc. Document shredder for cutting flat material
US20030201353A1 (en) * 2002-01-03 2003-10-30 David Lefrancois Dual-path office product disintegrator
US20040104289A1 (en) * 2002-02-06 2004-06-03 Hermann Schwelling File shredder
EP1334771A1 (de) * 2002-02-06 2003-08-13 Hermann Schwelling Aktenvernichter
WO2003066222A1 (de) * 2002-02-06 2003-08-14 Hermann Schwelling Feinschnitt-schneidwerk für aktenvernichter
RU2223823C1 (ru) * 2002-09-04 2004-02-20 Бахтинов Николай Алексеевич Центробежная роторная мельница
EP2316574A3 (de) * 2009-10-27 2012-03-14 Hermann Schwelling Verfahren zum Verhindern der Lesbarkeit von auf Festplatten gespeicherten Daten sowie Vorrichtung für die Zerkleinerung von Festplatten
US20120006920A1 (en) * 2010-07-08 2012-01-12 Shred-It International Inc. Staged paper shredder
US8770503B2 (en) * 2010-07-08 2014-07-08 Shred-It International Ulc Staged paper shredder
CN103611607A (zh) * 2013-11-25 2014-03-05 张忠义 一种涉密电子信息载体销毁设备及销毁方法
CN103611607B (zh) * 2013-11-25 2015-08-19 张忠义 一种涉密电子信息载体销毁设备及销毁方法
US20180361389A1 (en) * 2017-06-16 2018-12-20 Stephen Kwok Ki Chan Paper shredder
US11878307B2 (en) * 2019-11-27 2024-01-23 Seiko Epson Corporation Coarse crushing device and fiber treatment apparatus

Also Published As

Publication number Publication date
DE2410065B2 (de) 1976-03-04
JPS5013984A (enrdf_load_stackoverflow) 1975-02-13
FR2227054A1 (enrdf_load_stackoverflow) 1974-11-22
DE2410065A1 (de) 1974-11-14
FR2227054B3 (enrdf_load_stackoverflow) 1976-05-21

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