|Publication number||US3724766 A|
|Publication date||Apr 3, 1973|
|Filing date||May 14, 1971|
|Priority date||May 14, 1971|
|Publication number||US 3724766 A, US 3724766A, US-A-3724766, US3724766 A, US3724766A|
|Original Assignee||Ketcham & Mcdougall|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (103), Classifications (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent [191  3,724,766 Bosland [451 Apr. 3, 1973 54 SHREDDER Primary Examiner-Granville Y. Custer Jr. l  Inventor James M Bus and, Wayne, N J Atmmey Darby & Darby  Assignee: Ketcham 8r .McDougall, lnc., Roseland, NJ. [57 ABSTRACT  Filed: May 14, 1971 A paper shredder comprises a housing containing  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  US. Cl ..241/l00, 241/36 member includes a retaining portion at one end which  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;
relative to the cover. By moving the retainer member,  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;. ..........24l/l00 3,623,672 11/1971 DeFrank ..241/99 4 Claims, 3 Drawing Figures PATENTEmPRs I975 SHEET 1 BF 2 ATTORNEYS PATENTEUAFRS 197a 3.72dff66 sum 2 OF 2 WIIIIIIIIIII; L 1
INVENTOR. JAMES M. BOSLAND ATTORNEYS SHREDDER 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.
In many, if not most, businesses a substantial amount of discarded documents contains data or information which, if disclosed, could be harmful to the best interests of the company. Despite this, it is common practice for most companies to discard such documents in their original state. Only in extreme cases are important documents destroyed prior to discarding either by burning or by means of paper shredders.
Generally, commercially available paper shredders are relatively expensive devices which are cumbersome and not readily adaptable to the usual business environment, and there exists a need for a relatively inexpensive device which will reliably perform this function. 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.
Briefly, in accordance with the invention, 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. At the other end of the cover a second retention member is mounted on rails which are slidable within tracks in the cover. By appropriate positioning of the second retention member the distance between the two retention members can be adjusted to accommodate wastepaper baskets of different widths.
The invention is described in further detail below with reference to the attached drawings, wherein:
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; and
FIG. 3 is a sectional view along the line 3-3 of FIG. 1.
Referring to the drawings, a housing 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. In other words, 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.
Approximately at the center of the paper chute 40, 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.
in that it facilitates cleaning, while the arrangement of the retainer portions materially increases the versatility of the device.
What is claimed is:
1. A paper shredder comprising a housing,
rotatable shredder blades mounted in said housing,
an upper cover member hingedly connected to said 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
means cooperating with said housing and cover membcrfor securing said cover member to said housing.
2. A paper shredder comprising a housing,
rotatable shredder blades mounted in said housing,
an upper cover member hingedly connected to said 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.
3. A paper shredder comprising a housing,
rotatable shredder blades mounted in said housing,
an upper cover member hingedly connected to said 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.
4. A paper shredder comprising a housing,
rotatable shredder blades mounted in said housing,
an upper cover member hingedly connected to said 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.
1 i i i I.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US929960 *||Feb 2, 1909||Aug 3, 1909||Abbot Augustus Low||Waste-paper receptacle.|
|US2101700 *||Oct 8, 1936||Dec 7, 1937||Chesnut Jr Guy E||Crusher for used safety razor blades|
|US3396914 *||Mar 15, 1966||Aug 13, 1968||Centriblast Corp||Machine for disintegrating paper and other waste materials|
|US3620461 *||Feb 11, 1970||Nov 16, 1971||Pelleschi Charles A||Portable shredder for classified documents|
|US3623672 *||Jun 3, 1969||Nov 30, 1971||Frank William De||Disposing apparatus for burned-out or defective fluorescent tubes|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3827185 *||Jul 26, 1972||Aug 6, 1974||Match E Co Ltd||Ice skate sharpening apparatus|
|US4166030 *||Aug 15, 1978||Aug 28, 1979||De La Rue Crosfield Limited||Apparatus for handling sheets of paper|
|US4778114 *||Apr 10, 1987||Oct 18, 1988||Blower Application Company||Shredding apparatus|
|US4828188 *||Jul 8, 1988||May 9, 1989||Snyder Peter Lloyd Simon||Paper shredding device|
|US4944461 *||Aug 7, 1989||Jul 31, 1990||Invequest, Inc.||Carbon paper shredder|
|US5039020 *||Dec 21, 1989||Aug 13, 1991||Gao Gesellschaft Fur Automation Und Organisation Mbh||Method and apparatus for automatically monitoring the destruction of thin sheet material|
|US5065947 *||May 29, 1990||Nov 19, 1991||Invequest, Inc.||Method of shredding carbon paper|
|US5071080 *||Feb 27, 1990||Dec 10, 1991||Fellowes Manufacturing Company||Document shredding machine|
|US5295633 *||Jan 13, 1992||Mar 22, 1994||Fellowes Manufacturing Company||Document shredding machine with stripper and cutting mechanism therefore|
|US5511732 *||Dec 28, 1994||Apr 30, 1996||Fellowes Manufacturing Company||Document shredding machine with continuous stripper|
|US5636801 *||Aug 2, 1995||Jun 10, 1997||Fellowes Mfg. Co.||One piece molded stripper for shredders|
|US5655725 *||Aug 24, 1995||Aug 12, 1997||Fellowes Manufacturing Co.||Retaining plate for gearing|
|US5676321 *||Apr 3, 1995||Oct 14, 1997||Fellowes Mfg. Co.||Cutting disk|
|US5826809 *||Apr 30, 1997||Oct 27, 1998||Fellowes Manufacturing Company||Support for cutting cylinders in a paper shredder|
|US5829697 *||Jul 8, 1997||Nov 3, 1998||Fellowes Manufacturing Company||Support for cylinders in a paper shredder|
|US5839675 *||Oct 2, 1996||Nov 24, 1998||General Binding Corporation||Shredder support assembly and housing|
|US5954280 *||May 12, 1998||Sep 21, 1999||Fellowes Manufacturing Company||Top blocker for a paper shredder|
|US5961059 *||Apr 30, 1997||Oct 5, 1999||Fellowes Manufacturing Company||Support for drive system in a paper shredder|
|US5975445 *||Apr 14, 1997||Nov 2, 1999||Ko; Joseph Y.||Paper shredding device|
|US5988542 *||May 18, 1998||Nov 23, 1999||General Binding Corporation||Document shredding devices|
|US6079645 *||Sep 15, 1998||Jun 27, 2000||General Binding Corporation||Desktop shredders|
|US6250574 *||Apr 7, 1999||Jun 26, 2001||Li-Ming Wu Huang||Device for monitoring paper shredding action of paper shredder|
|US6357680 *||Jun 16, 1999||Mar 19, 2002||Jere F. Irwin||Self-feeding comminuting apparatus having improved drive motor features|
|US6390397 *||Oct 26, 1999||May 21, 2002||Joseph Y. Ko||Paper shredding device|
|US6460790||Jun 25, 2001||Oct 8, 2002||Li-Ming Wu Huang||Frame width adjusting structure of paper shredder|
|US6644573||Jun 18, 2001||Nov 11, 2003||Jere F. Irwin||Comminuting apparatus and pneumatic recirculation systems for comminuting apparatus|
|US6695239||Dec 3, 2001||Feb 24, 2004||Jere F. Irwin||Self-feeding comminuting apparatus having improved recirculation features|
|US7040559||Apr 2, 2004||May 9, 2006||Fellowes Inc.||Shredder with lock for on/off switch|
|US7048215||Feb 13, 2004||May 23, 2006||Irwin Jere F||Comminuting apparatus having screen and access tray|
|US7195185||Nov 2, 2004||Mar 27, 2007||Fellowes, Inc.||Shredder with separate waste opening|
|US7344096||Feb 2, 2006||Mar 18, 2008||Fellowes Inc.||Shredder with lock for on/off switch|
|US7624938||Dec 1, 2009||Acco Uk Limited||Shredding machine|
|US7631822||Jun 1, 2006||Dec 15, 2009||Fellowes Inc.||Shredder with thickness detector|
|US7631823||Jun 22, 2007||Dec 15, 2009||Fellowes Inc.||Shredder with thickness detector|
|US7631824||Jun 26, 2007||Dec 15, 2009||Fellowes Inc.||Shredder with thickness detector|
|US7635102||Jun 21, 2007||Dec 22, 2009||Fellowes Inc.||Shredder with thickness detector|
|US7641138 *||Jan 5, 2010||Emily Lo||Auxiliary unit of paper shredder cutting tools|
|US7712689||Jun 28, 2007||May 11, 2010||Fellowes Inc.||Shredder with thickness detector|
|US7762486||Jul 27, 2010||Staples The Office Superstore, Llc||Shredder|
|US7798435||Mar 22, 2006||Sep 21, 2010||Fellowes, Inc.||Shredder with oiling mechanism|
|US7871027||Jan 18, 2011||Techko, Inc.||Auto feed shredder apparatus and methods|
|US7946514||May 24, 2011||Fellowes, Inc.||Shredder with thickness detector|
|US7946515||Dec 3, 2009||May 24, 2011||Fellowes, Inc.||Shredder throat safety system|
|US7954737||Oct 4, 2007||Jun 7, 2011||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US7963468||Nov 11, 2009||Jun 21, 2011||Fellowes, Inc.||Shredder with thickness detector|
|US8008812||Jul 22, 2010||Aug 30, 2011||Aurora Office Equipment Co., Ltd.||Paper shredder control system responsive to touch-sensitive element|
|US8018099||Oct 9, 2009||Sep 13, 2011||Aurora Office Equipment Co., Ltd.||Touch-sensitive paper shredder control system|
|US8020796||Jun 16, 2010||Sep 20, 2011||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US8087599||Jan 3, 2012||Aurora Office Equipment Co., Ltd.||Anti-paper jam protection device for shredders|
|US8091809||Jan 10, 2012||Fellowes, Inc.||Shredder with jam proof system|
|US8113451||Jun 16, 2010||Feb 14, 2012||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US8146845||Jul 27, 2009||Apr 3, 2012||Aurora Office Equipment Co., Ltd. Shanghai||Automatic shredder without choosing the number of paper to be shredded|
|US8162244||Apr 24, 2012||Acco Uk Limited||Shredding machine|
|US8201761||Jun 19, 2012||Fellowes, Inc.||Thickness sensor based motor controller|
|US8201766||Jul 27, 2009||Jun 19, 2012||Aurora Office Equipment Co., Ltd.||Pins or staples removable structure of automatic shredders|
|US8205815||May 15, 2009||Jun 26, 2012||Fellowes, Inc.||Paper alignment sensor arrangement|
|US8382019||Feb 26, 2013||Fellowes, Inc.||In-rush current jam proof sensor control|
|US8424787||Apr 23, 2013||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US8430347||Oct 15, 2009||Apr 30, 2013||Fellowes, Inc.||Thickness adjusted motor controller|
|US8464767||Jan 27, 2012||Jun 18, 2013||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US8500049||Jul 19, 2011||Aug 6, 2013||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US8505841||Jan 7, 2010||Aug 13, 2013||Techtronic Floor Care Technology Limited||Anti-jamming assembly for shredders of sheet like material|
|US8511593||May 28, 2010||Aug 20, 2013||Fellowes, Inc.||Differential jam proof sensor for a shredder|
|US8550387||Jun 17, 2010||Oct 8, 2013||Tai Hoon K. Matlin||Restrictive throat mechanism for paper shredders|
|US8672247||Aug 19, 2011||Mar 18, 2014||Fellowes, Inc.||Shredder with thickness detector|
|US8678305||Jun 18, 2009||Mar 25, 2014||Fellowes, Inc.||Restrictive throat mechanism for paper shredders|
|US8708260||Aug 8, 2011||Apr 29, 2014||Aurora Office Equipment Co., Ltd.||Depowered standby paper shredder and method|
|US8723468||Apr 28, 2011||May 13, 2014||Aurora Office Equipment Co., Ltd.||Cooled motor|
|US8757526||Aug 19, 2011||Jun 24, 2014||Fellowes, Inc.||Shredder with thickness detector|
|US8783592||Mar 26, 2010||Jul 22, 2014||Fellowes, Inc.||Shredder with thickness detector|
|US8870106||Feb 3, 2011||Oct 28, 2014||Fellowes, Inc.||Shredder with thickness detector|
|US8963379||Jun 27, 2011||Feb 24, 2015||Aurora Office Equipment Co., Ltd. Shanghai||Paper shredder control system responsive to touch-sensitive element|
|US9044759||Feb 13, 2013||Jun 2, 2015||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US20040159725 *||Feb 13, 2004||Aug 19, 2004||Irwin Jere F.||Comminuting device with access tray|
|US20050218250 *||Apr 2, 2004||Oct 6, 2005||Fellowes Inc.||Shredder with lock for on/off switch|
|US20060091247 *||Nov 2, 2004||May 4, 2006||Fellowes, Inc.||Shredder with separate waste opening|
|US20060157601 *||Feb 2, 2006||Jul 20, 2006||Fellowes Inc.||Shredder with lock for on/off switch|
|US20070221767 *||Mar 22, 2006||Sep 27, 2007||Fellowes, Inc.||Shredder with oiling mechanism|
|US20070246580 *||Jun 21, 2007||Oct 25, 2007||Fellowes Inc.||Shredder with thickness detector|
|US20070246586 *||Jun 28, 2007||Oct 25, 2007||Fellowes Inc.||Shredder with thickness detector|
|US20080053994 *||Aug 30, 2006||Mar 6, 2008||Aurora Office Equipment Co., Ltd. Shanghai||Paper-Breaker Wastebin Structure|
|US20080093488 *||Oct 19, 2006||Apr 24, 2008||Staples The Office Superstore, Llc||Shredder|
|US20090032629 *||Jul 30, 2008||Feb 5, 2009||Acco Uk Limited||Shredding machine|
|US20090200407 *||Feb 13, 2008||Aug 13, 2009||Techko, Inc.||Auto feed shredder apparatus and methods|
|US20100084496 *||Oct 13, 2009||Apr 8, 2010||Fellowes, Inc.||Shredder with thickness detector|
|US20100102153 *||Dec 3, 2009||Apr 29, 2010||Fellowes, Inc.||Shredder throat safety system|
|US20100170969 *||Oct 15, 2009||Jul 8, 2010||Fellowes, Inc.||Thickness adjusted motor controller|
|US20100176227 *||Jul 15, 2010||Techtronic Floor Care Technology Limited||Anti-jamming assembly for shredders of sheet like material|
|US20100243774 *||Mar 24, 2009||Sep 30, 2010||Fellowers, Inc.||Shredder with jam proof system|
|US20100252664 *||Jun 16, 2010||Oct 7, 2010||Fellowes, Inc.||Shredder thickness with anti-jitter feature|
|US20100270404 *||Jul 27, 2009||Oct 28, 2010||Aurora Office Equipment Co., Ltd. Shanghai||type protection device for shredders|
|US20100282879 *||Nov 11, 2010||Aurora Office Equipment Co., Ltd.Shanghai||Anti-paper jam protection device for shredders|
|US20100288861 *||May 15, 2009||Nov 18, 2010||Fellowes, Inc.||Paper alignment sensor arrangement|
|US20100320297 *||Jun 17, 2010||Dec 23, 2010||Fellowes, Inc.||Restrictive throat mechanism for paper shredders|
|US20100320299 *||Jun 18, 2009||Dec 23, 2010||Fellowes, Inc.||Restrictive throat mechanism for paper shredders|
|US20110180641 *||Jul 28, 2011||Acco Uk Limited||Shredding machine|
|US20110186663 *||Aug 4, 2011||Fellowes Inc.||Shredder with thickness detector|
|US20110198425 *||Aug 18, 2011||Techko, Inc.||Auto feed shredder apparatus and methods|
|USRE40042 *||Apr 20, 2005||Feb 5, 2008||Michilin Prosperity Co., Ltd.||Dual-functional medium shredding machine structure|
|USRE44161||Feb 18, 2011||Apr 23, 2013||Fellowes, Inc.||Shredder with thickness detector|
|USRE44865||Apr 27, 2007||Apr 29, 2014||Michilin Prosperity Co., Ltd.||Dual functional medium shredding machine structure|
|EP0364673A2 *||Jul 7, 1989||Apr 25, 1990||TA TRIUMPH-ADLER Aktiengesellschaft||Housing for a document shredder|
|WO2000076667A1 *||May 31, 2000||Dec 21, 2000||Irwin Jere F||Self-feeding comminuting apparatus|
|U.S. Classification||241/100, 241/36|
|Cooperative Classification||B02C2018/0069, B02C18/0007, B02C2018/0023, B02C2018/0046|