US3724766A - Shredder - Google Patents

Shredder Download PDF

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Publication number
US3724766A
US3724766A US00143651A US3724766DA US3724766A US 3724766 A US3724766 A US 3724766A US 00143651 A US00143651 A US 00143651A US 3724766D A US3724766D A US 3724766DA US 3724766 A US3724766 A US 3724766A
Authority
US
United States
Prior art keywords
housing
cover member
paper
shredder
cover
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
US00143651A
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English (en)
Inventor
J Bosland
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.)
Ketcham and Mcdougall Inc
Original Assignee
Ketcham and Mcdougall Inc
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 Ketcham and Mcdougall Inc filed Critical Ketcham and Mcdougall Inc
Application granted granted Critical
Publication of US3724766A publication Critical patent/US3724766A/en
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
    • 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

  • a paper shredder comprises a housing containing [21] AppL No; 143,651 rotatable shredder blades, a driving motor and suitable reduction gears. A cover member containing a paper chute is hingedly supported on the housing. The cover [52] US.
  • Cl ..241/l00, 241/36 member includes a retaining portion at one end which [51] Int. CL...- ..B02c 19/12 is adapted to fit on the top of a wastepaper basket, At Field of Search the other end of the cover member a second retaining 100 portion is secured to slide rails which are adjustable;
  • references Cited the relative distance between the two retaining portions can be adjusted to accommodate different-sized UNITED STATES PATENTS wastepaper baskets.
  • a suitable limit switch operated 929,960 8/1909 Low 241/100 x by a s sing wire is secured within the cover member 2,101,700 12/1937 Chesnut, Jr... .241/100 X to actuate the motor which controls the shredder 3,396,914 8/1968 Liebman ..24l/236 x blades. 3,620,461 11/1971 Pel1eschi;.
  • the present invention relates to paper shredder devices of the type which may be'used in ordinary business establishments for the purpose of destroying documents.
  • the present invention provides apaper shredder which fulfills this demand. It is safe to operate, easy to clean and capable of providing trouble-free operation for a long time. Operation of the device is automatically controlled by insertion of a document into a paper chute with appropriate interlocking circuits preventing inadvertent operation of the blades. Additionally, the device may be readily supported upon a variety of wastepaper baskets or the like which vary substantially in size and shape.
  • the rotatable shredder blades along withthe driving motor and suitable reduction gears are mounted within a housing' to which a cover is pivotally secured.
  • the cover contains at one end a fixed retention member adapted to rest on the top of a wastepaper basket.
  • a second retention member is mounted on rails which are slidable within tracks in the cover.
  • FIG. 1 is a top plan view partially broken away of a shredder according to the invention
  • FIG. 2 is a side sectional view of the apparatus shown in FIG. 1;
  • FIG. 3 is a sectional view along the line 3-3 of FIG. 1.
  • housing 10 for the device is shown at 10.
  • a cover 12 is secured to housing by means of hinges 14.
  • Housing 10 includes spring lock members 16 which can be received within corresponding openings (not numbered) of cover 12 to secure the cover in its closed position.
  • Release button 18 are provided to release the spring lock members 16 when it is desired to open the cover 12.
  • Housing 10 and cover 12 may be made of plastic.
  • a metal inner casing 19 is secured to the interior of housing 10 by screws or the like (not shown).
  • Two rotatable shredders 20 and 22 are mounted within casing 19.
  • Each of the shredder blades includes a plurality of disk blades (for example, 20a, 22a, etc.) secured to respective axles2l, 23 which are appropriately journalled within opposing surfaces of casing 19. Adjacent blades are separated by annular plastic spacers 20' and 22 suitably secured to axles 21 and 23, respectively.
  • Corresponding blades of the shredders apply pressure against each other to insure proper cutting or shredding of the paper.
  • the blades 20a and 22a continuously exert pressure against each other at their point of contact while the two shredders 20 and 22 are rotating.
  • a plurality of strippers 24, shaped as shown in FIG. 3, are positioned between the blades of shredder 20 and a similar plurality of strippers 26 are positioned between the individual blades of shredder 22.
  • Strippers 24 and 26 may be made of nylon and function to prevent paper which is being fed through the blades from being wound around the axles of the shredders. The strippers are retained by engagement with lips 32 and 34 extending inwardly from casing 19, with each stripper enveloping a portion of a corresponding spacer 20 or 22'.
  • the shredders 20 and 22 are driven by a motor 30 and suitable reduction gears 28 mounted in a conventional way within metal casing 19.
  • the cover 12 includes a downwardly extending paper chute 40 integrally formed with the cover and adapted to pass the paper to be shredded into the nip of the shredders.
  • An overhang 42 at one end of the cover includes a fixed retainer portion 44 which is adapted to rest on an upperedge of a wastepaper basket or the like.
  • a second retainer portion 46 is mounted on metal slides 48 and 50 which are received within'tracks 52 and 54, respectively, within the cover 12; This arrangement permits the second retainer portion 46 to be moved relative to the fixed retainer portion 44 to accommodate wastepaper baskets of varying widths.
  • a sensing wire 56 is mounted so that it will be moved by a piece of paper inserted through the chute.
  • the sensing wire when depressed, actuates a miniature snap-action switch 58, suitably secured within cover 12, by means of the switch actuator 60.
  • the contacts (not shown) of switch 58 are connected in the electric circuit of the motor 30 so that when the sensing wire 56 causes the switch 58 to be actuated, the motor operates, thus providing automatic operation in response to insertion of a document into paper chute 40.
  • Wire 56 may be pinned at 59 to a bracket 61 in which switch 58 is mounted. 1
  • the invention also providesv special means for preventing operation of the shredders when cover 12 is opened. The purpose of this is to prevent inadvertent operation which possibly could result in injury to the user.
  • This protection circuit includes an interlock switch 62 also mounted on the interior surface of cover 12 and including an actuator 66. An L-shaped strip 67 is secured to housing 10 and contacts actuator 66 when the cover 12 is closed.
  • the switch 62 may include normally open contacts connected in series with the motor so that-the motor cannot be operated until the actuator 66 has been depressed.
  • An override switch 68 may be mounted on the overhang 42 of cover 12, with the switch actuator 69 accessible to the user.
  • the override switch 68 overrides the automatic switch 58 when it is in the off position to prevent operation of the shredder. In the -automatic" switch position, operation of the device is as described above.
  • a paper shredder comprising a housing
  • said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having asecond retaining portion thereon, and
  • a paper shredder comprising a housing
  • said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said cover member to said housing, a motor for driving said shredder blades,
  • a switch for enabling said motor and a sensing wire for actuating said switch, said sensing wire being positioned across said chute.
  • a paper shredder comprising a housing
  • said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including, a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said cover member to said housing, a motor for driving said shredder blades, a first switch for enabling said motor, a sensing wire for actuating said first switch, said sensing wire being positioned across said chute and a safety switch for enabling said motor only when the cover member is closed.
  • a paper shredder comprising a housing
  • said cover including a paper chute for feeding paper to said shredder blades, one end of said cover member including a retaining portion adapted to rest on a refuse basket or the like, the other end of said cover member including a slide having a second retaining portion thereon, means cooperating with said housing and cover member for securing said member to said housing, said shredder blades including a plurality of dis s and paper strippers positioned between adjacent disks for stripping the paper from the disks.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Nonmetal Cutting Devices (AREA)
US00143651A 1971-05-14 1971-05-14 Shredder Expired - Lifetime US3724766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14365171A 1971-05-14 1971-05-14

Publications (1)

Publication Number Publication Date
US3724766A true US3724766A (en) 1973-04-03

Family

ID=22504988

Family Applications (1)

Application Number Title Priority Date Filing Date
US00143651A Expired - Lifetime US3724766A (en) 1971-05-14 1971-05-14 Shredder

Country Status (3)

Country Link
US (1) US3724766A (enrdf_load_stackoverflow)
JP (1) JPS5214870B1 (enrdf_load_stackoverflow)
GB (1) GB1321580A (enrdf_load_stackoverflow)

Cited By (73)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3827185A (en) * 1971-07-29 1974-08-06 Match E Co Ltd Ice skate sharpening apparatus
US4166030A (en) * 1975-08-06 1979-08-28 De La Rue Crosfield Limited Apparatus for handling sheets of paper
FR2502982A1 (fr) * 1981-03-31 1982-10-08 Schwelling Hermann Dispositif d'alimentation et bati pour destructeur de documents
US4778114A (en) * 1987-04-10 1988-10-18 Blower Application Company Shredding apparatus
US4828188A (en) * 1988-07-08 1989-05-09 Snyder Peter Lloyd Simon Paper shredding device
EP0364673A3 (en) * 1988-10-21 1990-06-27 Ta Triumph-Adler Aktiengesellschaft Housing for a document shredder
US4944461A (en) * 1989-08-07 1990-07-31 Invequest, Inc. Carbon paper shredder
US5039020A (en) * 1988-12-23 1991-08-13 Gao Gesellschaft Fur Automation Und Organisation Mbh Method and apparatus for automatically monitoring the destruction of thin sheet material
US5065947A (en) * 1989-08-07 1991-11-19 Invequest, Inc. Method of shredding carbon paper
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
US5511732A (en) * 1994-12-28 1996-04-30 Fellowes Manufacturing Company Document shredding machine with continuous stripper
USD375973S (en) 1995-08-25 1996-11-26 General Binding Corporation Paper shredder
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
USD388819S (en) 1996-08-09 1998-01-06 Fairform Manufacturing Company Limited Paper shredder
US5826809A (en) * 1997-04-30 1998-10-27 Fellowes Manufacturing Company Support for cutting cylinders in a paper shredder
US5829697A (en) * 1995-08-24 1998-11-03 Fellowes Manufacturing Company Support for cylinders in a paper shredder
US5839675A (en) * 1996-10-02 1998-11-24 General Binding Corporation Shredder support assembly and housing
USD404756S (en) * 1996-10-02 1999-01-26 General Binding Corporation Shredder
USD410246S (en) 1998-09-15 1999-05-25 General Binding Corporation Paper shredder
USD412716S (en) 1998-06-30 1999-08-10 Fellowes Manufacturing Company Paper shredder
US5954280A (en) * 1998-05-12 1999-09-21 Fellowes Manufacturing Company Top blocker for a paper shredder
US5961059A (en) * 1997-04-30 1999-10-05 Fellowes Manufacturing Company Support for drive system in a paper shredder
US5975445A (en) * 1997-04-14 1999-11-02 Ko; Joseph Y. Paper shredding device
US5988542A (en) * 1998-05-18 1999-11-23 General Binding Corporation Document shredding devices
US6079645A (en) * 1998-09-15 2000-06-27 General Binding Corporation Desktop shredders
WO2000076667A1 (en) * 1999-06-16 2000-12-21 Irwin Jere F Self-feeding comminuting apparatus
US6250574B1 (en) * 1999-04-07 2001-06-26 Li-Ming Wu Huang Device for monitoring paper shredding action of paper shredder
USD455170S1 (en) 2001-04-30 2002-04-02 Ming-Hui Ho Paper shredder
US6390397B1 (en) * 1999-10-26 2002-05-21 Joseph Y. Ko Paper shredding device
US6460790B1 (en) 2001-06-25 2002-10-08 Li-Ming Wu Huang Frame width adjusting structure of paper shredder
US6644573B2 (en) 2001-06-18 2003-11-11 Jere F. Irwin Comminuting apparatus and pneumatic recirculation systems for comminuting apparatus
US20050218250A1 (en) * 2004-04-02 2005-10-06 Fellowes Inc. Shredder with lock for on/off switch
US20060091247A1 (en) * 2004-11-02 2006-05-04 Fellowes, Inc. Shredder with separate waste opening
USD546872S1 (en) 2006-08-09 2007-07-17 Staples The Office Superstore, Llc Shredder device
USD547366S1 (en) 2006-06-15 2007-07-24 Staples The Office Superstore, Llc Shredder device
US20070221767A1 (en) * 2006-03-22 2007-09-27 Fellowes, Inc. Shredder with oiling mechanism
US20070246586A1 (en) * 2004-09-10 2007-10-25 Fellowes Inc. Shredder with thickness detector
USD556250S1 (en) 2006-10-30 2007-11-27 Staples The Office Superstore, Llc Shredder
USRE40042E1 (en) * 2000-10-10 2008-02-05 Michilin Prosperity Co., Ltd. Dual-functional medium shredding machine structure
US20080053994A1 (en) * 2006-08-30 2008-03-06 Aurora Office Equipment Co., Ltd. Shanghai Paper-Breaker Wastebin Structure
US20080093488A1 (en) * 2006-10-19 2008-04-24 Staples The Office Superstore, Llc Shredder
US20090032629A1 (en) * 2007-08-02 2009-02-05 Acco Uk Limited Shredding machine
USD586846S1 (en) 2007-08-31 2009-02-17 Staples The Office Superstore, Llc Shredder
USD587297S1 (en) 2007-08-31 2009-02-24 Staples The Office Superstore, Llc Shredder
US20090200407A1 (en) * 2008-02-13 2009-08-13 Techko, Inc. Auto feed shredder apparatus and methods
US7624938B2 (en) 2006-04-24 2009-12-01 Acco Uk Limited Shredding machine
US7641138B1 (en) * 2008-04-14 2010-01-05 Emily Lo Auxiliary unit of paper shredder cutting tools
USD611088S1 (en) 2008-02-20 2010-03-02 Staples The Office Superstore, Llc Shredder
US20100102153A1 (en) * 2004-09-10 2010-04-29 Fellowes, Inc. Shredder throat safety system
US20100170969A1 (en) * 2009-01-05 2010-07-08 Fellowes, Inc. Thickness adjusted motor controller
US20100176227A1 (en) * 2009-01-11 2010-07-15 Techtronic Floor Care Technology Limited Anti-jamming assembly for shredders of sheet like material
US7762486B2 (en) 2007-01-30 2010-07-27 Staples The Office Superstore, Llc Shredder
US20100243774A1 (en) * 2009-03-24 2010-09-30 Fellowers, Inc. Shredder with jam proof system
US20100252664A1 (en) * 2007-10-04 2010-10-07 Fellowes, Inc. Shredder thickness with anti-jitter feature
US20100270404A1 (en) * 2009-04-28 2010-10-28 Aurora Office Equipment Co., Ltd. Shanghai type protection device for shredders
US20100282879A1 (en) * 2009-05-07 2010-11-11 Aurora Office Equipment Co., Ltd.Shanghai Anti-paper jam protection device for shredders
US20100288861A1 (en) * 2009-05-15 2010-11-18 Fellowes, Inc. Paper alignment sensor arrangement
US20100320297A1 (en) * 2009-06-18 2010-12-23 Fellowes, Inc. Restrictive throat mechanism for paper shredders
US20100320299A1 (en) * 2009-06-18 2010-12-23 Fellowes, Inc. Restrictive throat mechanism for paper shredders
US20110186663A1 (en) * 2004-09-10 2011-08-04 Fellowes Inc. Shredder with thickness detector
US8008812B2 (en) 2006-07-14 2011-08-30 Aurora Office Equipment Co., Ltd. Paper shredder control system responsive to touch-sensitive element
US8018099B2 (en) 2006-07-14 2011-09-13 Aurora Office Equipment Co., Ltd. Touch-sensitive paper shredder control system
US8146845B2 (en) 2008-08-06 2012-04-03 Aurora Office Equipment Co., Ltd. Shanghai Automatic shredder without choosing the number of paper to be shredded
US8201766B2 (en) 2008-08-19 2012-06-19 Aurora Office Equipment Co., Ltd. Pins or staples removable structure of automatic shredders
US8201761B2 (en) 2009-01-05 2012-06-19 Fellowes, Inc. Thickness sensor based motor controller
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
US8672247B2 (en) 2005-07-11 2014-03-18 Fellowes, Inc. Shredder with thickness detector
US8708260B2 (en) 2011-08-08 2014-04-29 Aurora Office Equipment Co., Ltd. Depowered standby paper shredder and method
US8723468B2 (en) 2011-04-28 2014-05-13 Aurora Office Equipment Co., Ltd. Cooled motor

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5076485U (enrdf_load_stackoverflow) * 1973-11-15 1975-07-03
DE3211931A1 (de) * 1982-03-31 1983-10-13 Hermann 7777 Salem Schwelling Abdeckklappe fuer den schneidwerksraum von aktenvernichtern
GB8431430D0 (en) * 1984-12-13 1985-01-23 Ofrex Group Plc Shredding machines
DE4003222C1 (enrdf_load_stackoverflow) * 1990-02-03 1991-04-18 Pbs-Servicegesellschaft Mbh & Co. Kg, 3000 Hannover, De
DE4042544C2 (de) * 1990-03-17 1996-06-27 Schleicher & Co Int Dokumentenvernichter
US5538194A (en) * 1990-03-17 1996-07-23 Schleicher & Co. International Aktiengesellschaft Document shredder

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US929960A (en) * 1909-02-02 1909-08-03 Abbot Augustus Low Waste-paper receptacle.
US2101700A (en) * 1936-10-08 1937-12-07 Jr Guy E Chesnut Crusher for used safety razor blades
US3396914A (en) * 1966-03-15 1968-08-13 Centriblast Corp Machine for disintegrating paper and other waste materials
US3620461A (en) * 1970-02-11 1971-11-16 Joe Pelleschi Portable shredder for classified documents
US3623672A (en) * 1969-06-03 1971-11-30 William De Frank Disposing apparatus for burned-out or defective fluorescent tubes

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US929960A (en) * 1909-02-02 1909-08-03 Abbot Augustus Low Waste-paper receptacle.
US2101700A (en) * 1936-10-08 1937-12-07 Jr Guy E Chesnut Crusher for used safety razor blades
US3396914A (en) * 1966-03-15 1968-08-13 Centriblast Corp Machine for disintegrating paper and other waste materials
US3623672A (en) * 1969-06-03 1971-11-30 William De Frank Disposing apparatus for burned-out or defective fluorescent tubes
US3620461A (en) * 1970-02-11 1971-11-16 Joe Pelleschi Portable shredder for classified documents

Cited By (120)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3827185A (en) * 1971-07-29 1974-08-06 Match E Co Ltd Ice skate sharpening apparatus
US4166030A (en) * 1975-08-06 1979-08-28 De La Rue Crosfield Limited Apparatus for handling sheets of paper
FR2502982A1 (fr) * 1981-03-31 1982-10-08 Schwelling Hermann Dispositif d'alimentation et bati pour destructeur de documents
US4778114A (en) * 1987-04-10 1988-10-18 Blower Application Company Shredding apparatus
US4828188A (en) * 1988-07-08 1989-05-09 Snyder Peter Lloyd Simon Paper shredding device
EP0364673A3 (en) * 1988-10-21 1990-06-27 Ta Triumph-Adler Aktiengesellschaft Housing for a document shredder
US5039020A (en) * 1988-12-23 1991-08-13 Gao Gesellschaft Fur Automation Und Organisation Mbh Method and apparatus for automatically monitoring the destruction of thin sheet material
US4944461A (en) * 1989-08-07 1990-07-31 Invequest, Inc. Carbon paper shredder
US5065947A (en) * 1989-08-07 1991-11-19 Invequest, Inc. Method of shredding carbon paper
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
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
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
USD375973S (en) 1995-08-25 1996-11-26 General Binding Corporation Paper shredder
USD388819S (en) 1996-08-09 1998-01-06 Fairform Manufacturing Company Limited Paper shredder
US5839675A (en) * 1996-10-02 1998-11-24 General Binding Corporation Shredder support assembly and housing
USD404756S (en) * 1996-10-02 1999-01-26 General Binding Corporation Shredder
US5975445A (en) * 1997-04-14 1999-11-02 Ko; Joseph Y. Paper shredding device
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
USD412716S (en) 1998-06-30 1999-08-10 Fellowes Manufacturing Company Paper shredder
US6079645A (en) * 1998-09-15 2000-06-27 General Binding Corporation Desktop shredders
USD410246S (en) 1998-09-15 1999-05-25 General Binding Corporation Paper shredder
US6250574B1 (en) * 1999-04-07 2001-06-26 Li-Ming Wu Huang Device for monitoring paper shredding action of paper shredder
US6695239B2 (en) 1999-06-16 2004-02-24 Jere F. Irwin Self-feeding comminuting apparatus having improved recirculation features
WO2000076667A1 (en) * 1999-06-16 2000-12-21 Irwin Jere F Self-feeding comminuting apparatus
US6357680B1 (en) * 1999-06-16 2002-03-19 Jere F. Irwin Self-feeding comminuting apparatus having improved drive motor features
US7048215B2 (en) 1999-06-16 2006-05-23 Irwin Jere F Comminuting apparatus having screen and access tray
US20040159725A1 (en) * 1999-06-16 2004-08-19 Irwin Jere F. Comminuting device with access tray
US6390397B1 (en) * 1999-10-26 2002-05-21 Joseph Y. Ko Paper shredding device
USRE44865E1 (en) 2000-10-10 2014-04-29 Michilin Prosperity Co., Ltd. Dual functional medium shredding machine structure
USRE40042E1 (en) * 2000-10-10 2008-02-05 Michilin Prosperity Co., Ltd. Dual-functional medium shredding machine structure
USD455170S1 (en) 2001-04-30 2002-04-02 Ming-Hui Ho Paper shredder
US6644573B2 (en) 2001-06-18 2003-11-11 Jere F. Irwin Comminuting apparatus and pneumatic recirculation systems for comminuting apparatus
US6460790B1 (en) 2001-06-25 2002-10-08 Li-Ming Wu Huang Frame width adjusting structure of paper shredder
US20050218250A1 (en) * 2004-04-02 2005-10-06 Fellowes Inc. Shredder with lock for on/off switch
US7040559B2 (en) 2004-04-02 2006-05-09 Fellowes Inc. Shredder with lock for on/off switch
US20060157601A1 (en) * 2004-04-02 2006-07-20 Fellowes Inc. Shredder with lock for on/off switch
US7344096B2 (en) 2004-04-02 2008-03-18 Fellowes Inc. Shredder with lock for on/off switch
US7631822B2 (en) 2004-09-10 2009-12-15 Fellowes Inc. Shredder with thickness detector
US7946515B2 (en) 2004-09-10 2011-05-24 Fellowes, Inc. Shredder throat safety system
US20070246586A1 (en) * 2004-09-10 2007-10-25 Fellowes Inc. Shredder with thickness detector
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JPS5214870B1 (enrdf_load_stackoverflow) 1977-04-25

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