CA2579137A1 - Shredder throat safety system - Google Patents

Shredder throat safety system

Info

Publication number
CA2579137A1
CA2579137A1 CA002579137A CA2579137A CA2579137A1 CA 2579137 A1 CA2579137 A1 CA 2579137A1 CA 002579137 A CA002579137 A CA 002579137A CA 2579137 A CA2579137 A CA 2579137A CA 2579137 A1 CA2579137 A1 CA 2579137A1
Authority
CA
Canada
Prior art keywords
shredder
shredder according
switch
housing
cutter elements
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.)
Granted
Application number
CA002579137A
Other languages
French (fr)
Other versions
CA2579137C (en
Inventor
Taihoon K. Matlin
Eric Gach
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.)
Fellowes Inc
Original Assignee
Individual
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
Priority claimed from US10/937,304 external-priority patent/US7311276B2/en
Application filed by Individual filed Critical Individual
Priority to CA2683280A priority Critical patent/CA2683280C/en
Publication of CA2579137A1 publication Critical patent/CA2579137A1/en
Application granted granted Critical
Publication of CA2579137C publication Critical patent/CA2579137C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/04—Safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/141—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using sound propagation, e.g. sonar
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/145—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using magnetic technology
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/147—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using electro-magnetic technology, e.g. tags or radar
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/148—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using capacitive technology
    • 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
    • B02C2018/0015—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents for disintegrating CDs, DVDs and/or credit cards
    • 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
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C2018/164—Prevention of jamming and/or overload
    • 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
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C2018/168—User safety devices or measures in shredders

Abstract

The present invention relates to a shredder with various devices for sensing ingress or potential ingress of an undesired object, such as a person's finger or hand, into the feed opening.

Claims (52)

1. A shredder comprising:
a housing;
a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling articles to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements so that the cutter elements shred the articles fed therein;
the housing having an opening enabling articles to be fed therethrough into the cutter elements of the shredder mechanism for shredding;
a proximity sensor at least in part located adjacent the opening and configured to indicate the presence of a person or animal in proximity to the opening;
and a controller operable to perform a predetermined operation responsive to the indicated presence of the person or animal.
2. A shredder according to claim 1, wherein the predetermined operation is disabling the shredder mechanism responsive to the indicated presence of the person or animal.
3. A shredder according to claim 1, wherein the predetermined operation is illuminating an indicator responsive to the indicated presence of the person or animal.
4. A shredder according to claim 1, wherein the controller comprises a microcontroller.
5. A shredder according to claim 1, wherein the proximity sensor is a capacitive sensor.
6. A shredder according to claim 5, wherein:

the proximity sensor includes an electroconductive element located adjacent the opening and circuitry to sense a state of the electroconductive element, the proximity sensor being configured to indicate a change in the state of the electroconductive element corresponding to a change in capacitance caused by a person or animal approaching in proximity to the electroconductive element, and the controller is operable to perform the predetermined operation responsive to the indicated change in the state of the electroconductive element.
7. A shredder according to claim 6, wherein the electroconductive element is a thin metal member extending along a portion of the housing adjacent the opening.
8. A shredder according to claim 7, wherein the metal member is provided on an interior surface of the housing.
9. A shredder according to claim 8, wherein the metal member is provided only on an interior surface of the housing, and not on an exterior surface.
10. A shredder according to claim 8, wherein the metal member is also provided on an exterior surface of the housing.
11. A shredder according to claim 10, wherein the portion of the housing on which the metal member is provided has an edge that defines part of the opening, and wherein the metal member extends from the interior surface of the housing to the exterior surface over the edge.
12. A shredder according to claim 7, wherein the shredder mechanism is embedded within the housing.
13. A shredder according to claim 7, wherein the metal member is at least in part adhered to the portion of the housing adjacent the opening.
14. A shredder according to claim 13, wherein the metal member comprises metal tape.
15. A shredder according to claim 7, wherein the metal member is at least in part covered by a non-conductive member.
16. A shredder according to claim 15, wherein the non-conductive member is at least in part covered by a conductive member.
17. A shredder according to claim 6, wherein the electroconductive element at least in part comprises metal paint applied to a portion of the housing or to a member associated with the housing.
18. A shredder according to claim 6, wherein the electroconductive element includes at least two metal members each extending along a portion of the housing adjacent the opening.
19. A shredder according to claim 1, wherein the controller at least in part comprises a microprocessor.
20. A shredder according to claim 1, wherein the controller at least in part comprises discrete circuit components.
21. A shredder according to claim 1, wherein the controller at least in part comprises an analog circuit.
22. A shredder comprising:
a housing;
a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling articles to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements so that the cutter elements shred the articles fed therein;
the housing having a movable part providing at least part of an opening enabling articles to be fed therethrough into the cutter elements of the shredder mechanism for shredding, the movable part being movable from a first position to a second position and being biased to the first position;
a detector configured to detect movement of the movable part to the second position;

the movable part being constructed to move from the first position to the second position upon a user attempting to force an article having a thickness greater than a predetermined thickness through the opening; and a controller operable to perform a predetermined operation responsive to the detector detecting that the movable part has moved to the second position.
23. A shredder according to claim 22, wherein the detector comprises a switch that is actuated in response to the movable part moving to the second position.
24. A shredder according to claim 22, wherein the predetermined operation is illuminating an indicator.
25. A shredder according to claim 22, wherein the predetermined operation is sounding an alarm indicator.
26. A shredder according to claim 22, wherein the predetermined operation is stopping the cutter elements.
27. A shredder according to claim 22, wherein the controller comprises a microcontroller.
28. A shredder according to claim 22, wherein at least a portion of a wall of the opening is moveable in response to pressure of an inserted article having a thickness greater than the predetermined thickness, thereby triggering the detector.
29. A shredder according to claim 28, wherein the portion moves outwardly in response to the pressure.
30. A shredder according to claim 28, wherein the portion moves downwardly in response to the pressure.
31. A shredder according to claim 28, wherein the portion is spring biased towards an upward position and in response to the insertion of the article having a thickness greater than the predetermined thickness, the portion is pushed downward to actuate the switch.
32. A shredder according to claim 31, wherein the portion includes a plunger.
33. A shredder according to claim 31, wherein the shredder comprises a switch that is actuated by the plunger as the movable part moves to the second position.
34. A shredder according to claim 23, wherein the switch is a foil switch.
35. A shredder according to claim 23, wherein the switch is a lever switch.
36. A shredder according to claim 22, wherein the detector comprises a mechanical switch.
37. A shredder according to claim 22, wherein the detector comprises an optical detector.
38. A shredder according to claim 22, wherein the detector comprises a strain gauge configured and arranged to measure a movement of the movable part.
39. A shredder comprising:
a housing;
a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling articles to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements so that the cutter elements shred the articles fed therein;
the housing having an opening enabling articles to be fed therethrough into the cutter elements of the shredder mechanism for shredding;
a resistive switch, at least in part located adjacent the opening and configured to indicate the presence of a person or animal in contact with the switch; and a controller operable to perform a predetermined operation responsive to the indicated presence of the person or animal.
40. A shredder according to claim 39, wherein the predetermined operation is illuminating an indicator.
41. A shredder according to claim 39, wherein the predetermined operation is sounding an alarm indicator.
42. A shredder according to claim 39, wherein the predetermined operation is stopping the cutter elements.
43. A shredder according to claim 39, wherein the resistive switch further comprises a pair of electrically isolated conductive elements that, when simultaneously contacted by a part of the person or animal, are in electrical communication.
44. A shredder according to claim 39, wherein the controller is configured to monitor changes in signal strength from the switch over time, and to adjust a threshold value for performing the predetermined operation.
45. A shredder according to claim 39, wherein the controller is configured to perform the predetermined operation based at least in part on a rate of change of a monitored resistance of the resistive switch.
46. A shredder according to claim 39, wherein the controller is configured to perform the predetermined operation based at least in part on a monitored resistance of the resistive switch.
47. A device for use with a shredder, the shredder including a housing having an opening enabling articles to be fed therethrough into cutter elements of a shredder mechanism for shredding, the device comprising:
a switch, affixable to a portion of a shredder proximate the opening and configured to indicate the presence of a person or animal in contact with the switch;
a controller, in electrical communication with the switch, the controller having a connector constructed and arranged to engage a power supply and a receptacle constructed and arranged to accept a power cord of the shredder, the controller further being configured to provide power from the power supply to the shredder and to stop providing power to the shredder responsive to the indicated presence of the person or animal.
48. A device as in claim 47, wherein the switch is removably affixable to the shredder.
49. A device as in claim 47, wherein the switch is a capacitive switch.
50. A device as in claim 47, wherein the switch is a resistive switch.
51. A device as in claim 47, wherein the switch is a mechanical switch.
52. A device as in claim 51, wherein the mechanical switch is a pressure switch.
CA2579137A 2004-09-10 2005-08-09 Shredder throat safety system Active CA2579137C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2683280A CA2683280C (en) 2004-09-10 2005-08-09 Shredder throat safety system

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US10/937,304 2004-09-10
US10/937,304 US7311276B2 (en) 2004-09-10 2004-09-10 Shredder with proximity sensing system
US11/177,480 US7661614B2 (en) 2004-09-10 2005-07-11 Shredder throat safety system
US11/177,480 2005-07-11
PCT/US2005/028290 WO2006031324A1 (en) 2004-09-10 2005-08-09 Shredder throat safety system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2683280A Division CA2683280C (en) 2004-09-10 2005-08-09 Shredder throat safety system

Publications (2)

Publication Number Publication Date
CA2579137A1 true CA2579137A1 (en) 2006-03-23
CA2579137C CA2579137C (en) 2010-06-22

Family

ID=35169695

Family Applications (2)

Application Number Title Priority Date Filing Date
CA2579137A Active CA2579137C (en) 2004-09-10 2005-08-09 Shredder throat safety system
CA2683280A Active CA2683280C (en) 2004-09-10 2005-08-09 Shredder throat safety system

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA2683280A Active CA2683280C (en) 2004-09-10 2005-08-09 Shredder throat safety system

Country Status (10)

Country Link
US (2) US7661614B2 (en)
EP (2) EP1819442B1 (en)
JP (3) JP2006075831A (en)
CN (2) CN101716545B (en)
AU (4) AU2005285398B2 (en)
CA (2) CA2579137C (en)
DE (3) DE202005021604U1 (en)
PL (1) PL1819442T3 (en)
RU (1) RU2446891C2 (en)
WO (1) WO2006031324A1 (en)

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