CA2645569A1 - Shredder - Google Patents

Shredder Download PDF

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Publication number
CA2645569A1
CA2645569A1 CA002645569A CA2645569A CA2645569A1 CA 2645569 A1 CA2645569 A1 CA 2645569A1 CA 002645569 A CA002645569 A CA 002645569A CA 2645569 A CA2645569 A CA 2645569A CA 2645569 A1 CA2645569 A1 CA 2645569A1
Authority
CA
Canada
Prior art keywords
shredder
thickness
cutter elements
article
shredded
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
CA002645569A
Other languages
French (fr)
Other versions
CA2645569C (en
Inventor
Tai-Hoon 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
Fellowes, Inc.
Tai-Hoon K. Matlin
Eric Gach
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=38268807&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2645569(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US11/385,864 external-priority patent/US7798435B2/en
Application filed by Fellowes, Inc., Tai-Hoon K. Matlin, Eric Gach filed Critical Fellowes, Inc.
Priority to CA2721620A priority Critical patent/CA2721620C/en
Publication of CA2645569A1 publication Critical patent/CA2645569A1/en
Application granted granted Critical
Publication of CA2645569C publication Critical patent/CA2645569C/en
Active legal-status Critical Current
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
    • 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
    • B02C23/06—Selection or use of additives to aid disintegrating
    • 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
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • 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
    • 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
    • B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/088—Means for treating work or cutting member to facilitate cutting by cleaning or lubricating
    • 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
    • B02C18/0007—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
    • B02C18/06—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
    • B02C2018/166—Lubricating the knives of the cutting mechanisms
    • 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

One aspect of the present invention relates to a shredder with a lubricating system. Another aspect relates to a shredder with usage monitoring. Other aspects relate to document thickness sensing in a shredder, including but not limited to the ability to indicate progressive amounts of thickness, the ability to select a material to be shredded for varying the maximum thickness permitted, and the

Claims (80)

1. A shredder for shredding substrates, comprising:
a housing;
a shredder mechanism received in the housing and including a motor and cutter elements, the shredder mechanism enabling substrates to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements in a shredding direction so that the cutter elements shred the substrates fed therein;
the housing having a feed opening enabling the substrates to be shredded to be fed into the cutter elenients;
a reservoir constructed to contain an amount of fluid lubricant;
a plurality of nozzles communicated with the reservoir; and a pump, operable to deliver the fluid under pressure to the plurality of nozzles such that the fluid is sprayed to lubricate the cutter elements.
2. A shredder as in claim 1, wherein, when in operation, the fluid is sprayed in a predetermined pattern onto the cutter elements.
3. A shredder as in claim 1, further comprising a controller, configured and arranged to control operation of the pump.
4. A shredder as in claim 3, wherein the controller is configured to operate the pump to spray the fluid according to a predetermined schedule.
5. A shredder as in claim 4, wherein the controller monitors a number of rotations of the cutting elements during shredding operations and wherein the controller is configured to operate the pump to spray the fluid in response to a measured number of rotations of the cutting elements.
6. A shredder as in claim 4, wherein the controller monitors a total thickness of material shredded by the shredder during shredding operations and wherein the controller is configured to operate the pump to spray the fluid in response to a measured total thickness of niaterial shredded by the shredder reaching or exceeding a predetermined value.
7. A shredder as in claim 1, further comprising a stack thickness gauge having a substrate receiving opening configured to receive an edge portion of a stack of substrates therein, the substrate receiving opening having a width less than or equal to a maximum thickness of a stack of substrates that the shredder mechanism is capable of shredding.
8. A shredder as in claim 7, further comprising a sensor configured to measure a thickness of the edge portion of the stack of substrates when inserted into the substrate receiving opening.
9. A shredder as in claim 8, further comprising a memory, configured to receive from the sensor, data relating to the measured thickness, and to store an accumulated total thickness.
10. A shredder as in claim 9, further comprising a controller, in communication with the memory and configured and arranged to control operation of the pump in response to the stored accumulated total thickness reaching or exceeding a predetermined value.
11. A shredder as in claim 1, further comprising an intermediate surface, positioned between the nozzles and the cutting elements, such that fluid sprayed from the nozzles impinges on the intermediate surface, and flows from the intermediate surface to the cutting elements.
12. A shredder as in claim 10, wherein the shredder mechanism includes one or more strippers between the cutter elements for dislodging shredded material, wherein the one or more strippers provide the intermediate surface with the nozzle spraying the fluid onto the one or more strippers.
13. A retrofittable lubricating kit for use with a shredder for shredding substrates, the shredder including a housing, a shredder mechanism received in the housing and including a motor and cutter elements, the shredder mechanism enabling substrates to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements in a shredding direction so that the cutter elements shred the substrates fed therein, the housing having a feed opening enabling the substrates to be shredded to be fed into the cutter elements, comprising:

a reservoir constructed to contain an amount of fluid lubricant;
a plurality of nozzles communicated with the reservoir; and a pump, operable to deliver the fluid under pressure to the plurality of nozzles such that the fluid is sprayed to lubricate the cutter elements.
14. A lubricating kit as in claim 13, wherein, when in operation, the fluid is sprayed in a predetermined pattern onto the cutter elements.
15. A lubricating kit as in claim 13, further comprising a controller, configured and arranged to control operation of the pump.
16. A lubricating kit as in claim 15, wherein the controller is configured to operate the pump to spray the fluid according to a predetermined schedule.
17. A shredder for shredding substrates for use with a removable reservoir containing a fluid lubricant, comprising:
a housing;
a shredder mechanism received in the housing and including a motor and cutter elements, the shredder mechanism enabling substrates to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements in a shredding direction so that the cutter elements shred the substrates fed therein;
the housing having a feed opening enabling the substrates to be shredded to be fed into the cutter elements;
an inlet opening constructed to be removably engaged with the removable reservoir for receiving the fluid lubricant;
a plurality of nozzles communicated with the inlet opening; and a pump, operable to deliver the fluid under pressure to the plurality of nozzles such that the fluid is sprayed to lubricate the cutter elements.
18. A shredder for shredding substrates, comprising:
a housing;
a shredder mechanism received in the housing and including a motor and cutter elements, the shredder mechanism enabling substrates to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements in a shredding direction so that the cutter elements shred the substrates fed therein;
the housing having a feed opening enabling the substrates to be shredded to be fed into the cutter elements;
a reservoir constructed to contain an amount of fluid lubricant;
at least one nozzle communicated with the reservoir;
a pump, operable to deliver the fluid under pressure to the at least one nozzles such that the fluid is sprayed to lubricate the cutter elements; and an intermediate surface, positioned between the nozzles and the cutting elements, such that fluid sprayed from the nozzles impinges directly on the intermediate surface, and flows from the intermediate surface to the cutting elements.
19. A shredder as in claim 18, wherein the shredder mechanism includes one or more strippers between the cutter elements for dislodging shredded material, wherein the one or more strippers provide the intermediate surface with the nozzle spraying the fluid onto the one or more strippers.
20. A shredder for shredding substrates for use with a removable reservoir containing a fluid lubricant, comprising:
a housing;
a shredder mechanism received in the housing and including a motor and cutter elements, the shredder mechanism enabling substrates to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements in a shredding direction so that the cutter elements shred the substrates fed therein;
the housing having a feed opening enabling the substrates to be shredded to be fed into the cutter elements;
an inlet opening constructed to be removably engaged with the removable reservoir for receiving the fluid lubricant;
at least one nozzle communicated with the inlet openly;
a pump, operable to deliver the fluid under pressure to the at least one nozzles such that the fluid is sprayed to lubricate the cutter elements; and an intermediate surface, positioned between the nozzles and the cutting elements, such that fluid sprayed from the nozzles impinges directly on the intermediate surface, and flows from the intermediate surface to the cutting elements.
21. A shredder as in claim 20, wherein the shredder mechanism includes one or more strippers between the cutter elements for dislodging shredded material, wherein the one or more strippers provide the intermediate surface with the nozzle spraying the fluid onto the one or more strippers.
22. A shredder comprising:
a housing having a throat for receiving at least one article to be shredded;
a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling the at least one article 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; and a monitor comprising a memory, the monitor being operable to store information in the memory related to an amount of use of the shredder, and to alert a user of the shredder when the shredder is due for a maintenance operation, based on the amount of use of the shredder.
23. A shredder according to claim 22, wherein the monitor further comprises a counter for counting a number of times the shredder has been used, and the monitor is configured to alert the user after the number of times the shredder has been used is equal to a predetermined value.
24. A shredder according to claim 22, wherein the shredder further comprises a detector configured to detect a thickness of the at least one article being received by the throat, wherein the memory is configured to accumulate a total amount of thickness detected by the detector over time, and wherein the monitor is configured to alert the user after the accumulated thickness is equal to a predetermined maximum total thickness.
25. A shredder comprising:
a housing having a throat for receiving at least one article to be shredded;
a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling the at least one article 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;

a lubrication system configured to lubricate the cutter elements;
a detector configured to detect a thickness of the at least one article being received by the throat; and a controller operable to store an accumulation of thicknesses detected by the detector over time and to actuate the lubrication system to lubricate the cutter elements when the accumulation is at least equal to a predetermined total thickness.
26. A shredder according to claim 25, wherein the detector comprises a contact member that extends into the throat and is actuated in response to the article being inserted into the throat.
27. A shredder according to claim 26, wherein the detector further comprises a strain gauge configured to measure movement of the contact member and communicate the movement to the controller.
28. A shredder according to claim 26, wherein the detector further comprises a piezoelectric sensor configured to measure movement of the contact member and comniunicate the movement to the controller.
29. A shredder according to claim 26, wherein the detector further comprises an optical sensor configured to measure movement of the contact member and communicate the movement to the controller.
30. A shredder according to claim 29, wherein the optical sensor comprises an infrared LED and a dual die infrared receiver configured to detect the direction and anlount of the movement.
31. A sliredder comprising:
a housing having a throat for receiving at least one article to be shredded;
a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling the at least one article 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;

a detector configured to detect a thickness of the at least one article being received by the throat; and a progressive indicator system configured to indicate to a user of the shredder the thickness of the at least one article detected by the detector within a range of thicknesses.
32. A shredder according to claim 31, wherein the progressive indicator system has a plurality of indicators, wherein each indicator is associated with a corresponding predetermined thickness of the at least one article within said range and including a maximum thickness indicator corresponding to the predetermined maximum thickness, wherein the progressive indicator system activates the indicator associated with its respective corresponding predetermined thickness based on the detector detecting that the thickness of the at least one article is at least equal to the corresponding predetermined thickness.
33. A shredder according to claim 32, wherein the progressive indicator system comprises a plurality of lights.
34. A shredder according to claim 33, wherein the plurality of lights comprises a green light and a red light, the green light being associated with a thickness that is below the predetermined maximum thickness, and the red light being associated with the predetermined maximum thickness.
35. A shredder according to claim 34, wherein the plurality of lights further comprises a yellow light, the yellow light being associated with a thickness that is in between the thickness associated with the green light and the thickness being associated with the red light.
36. A shredder according to claim 32, wherein the plurality of indicators of the progressive indicator system comprises a plurality of audible signals.
37. A shredder according to claim 31, wherein the detector comprises a contact member that extends into the throat and is actuated in response to the article being inserted into the throat.
38. A shredder according to claim 37, wherein the detector further comprises a strain gauge configured to measure movement of the contact member and communicate the movement to the controller.
39. A shredder according to claim 37, wherein the detector further comprises a piezoelectric sensor configured to measure movement of the contact member and communicate the movement to the controller.
40. A shredder according to claim 37, wherein the detector further comprises an optical sensor configured to measure movement of the contact member and communicate the movement to the controller.
41. A shredder according to claim 40, wherein the optical sensor comprises an infrared LED and a dual die infrared receiver configured to detect the direction and amount of the movement.
42. A shredder according to claim 31, further comprising a controller configured to disable operation of the cutter elements responsive to the detector detecting that the thickness of the at least one article is at least equal to a predetermined maximum thickness.
43. A method for operating a shredder comprising a housing having a throat for receiving at least one article to be shredded, and a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling the at least one article 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 method comprising:
detecting a thickness of at least one article being inserted into the throat of the shredder; and using a progressive indicator system to indicate to a user a detected thickness of the at least one article within a range of thicknesses.
44. A method according to claim 43, wherein the progressive indicator system includes a plurality of progressive indicators, wherein each indicator is associated with a corresponding predetermined thickness of the at least one article within said range and including a maximum thickness indicator corresponding to the predetermined maximum thickness, wherein the progressive indicator systems activates the indicator associated with its respective corresponding predetermined thickness based on the detector detecting that the thickness of the at least one article is at least equal to the corresponding predetermined thickness.
45. A method according to claim 44, wherein the progressive indicator system comprises a plurality of lights.
46. A method according to claim 45, wherein the plurality of lights comprises a green light and a red light, the green light being associated with a thickness that is below the predetermined maximum thickness, and the red light being associated with the predetermined maximum thickness.
47. A method according to claim 46, wherein the plurality of lights further comprises a yellow light, the yellow light being associated with a thickness that is in between the thickness associated with the green light and the thickness being associated with the red light.
48. A method according to claim 47, wherein the plurality of indicators of the progressive indicator system comprises a plurality of audible signals.
49. A method according to claim 43, further comprising disabling operation of the cutter elements responsive to that the thickness of the at least one article is at least equal to a predetermined maximum thickness.
50. A shredder comprising:
a housing having a throat for receiving at least one article to be shredded;
a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling the at least one article 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;

a detector configured to detect a thickness of the at least one article being received by the throat;
a controller operable to perform a predetermined operation responsive to the detector detecting that the thickness of the at least one article is at least equal to a predetermined maximum thickness; and an input for enabling a user to select a type of material to be shredded, the input being coupled to the controller for varying the predetermined maximum thickness in accordance with the material selected.
51. A shredder according to claim 50, wherein the predetermined operation is illuminating an indicator to alert a user.
52. A shredder according to claim 50, wherein the predetermined operation is sounding an audible alarm indicator to alert a user.
53. A shredder according to claim 50, wherein the predetermined operation is preventing the motor from driving the cutter elements.
54. A shredder according to claim 50, further comprising a progressive indicator system coupled to the controller, wherein the progressive indicator system is configured to indicate a detected thickness of the at least one article within a range of thicknesses.
55. A shredder according to claim 54, wherein the progressive indicator system has a plurality of indicators, wherein each indicator is associated with a corresponding predetermined thickness of the at least one article within said range and including a maximum thickness indicator corresponding to the predetermined maximum thickness, wherein the progressive indicator system activates the indicator associated with its respective corresponding predetermined thickness based on the detector detecting that the thickness of the at least one article is at least equal to the corresponding predetermined thickness.
56. A shredder according to claim 55, wherein the progressive indicator system comprises a plurality of lights.
57. A shredder according to claim 56, wherein the plurality of lights comprises a green light and a red light, the green light being associated with a thickness that is below the predetermined maximum thickness, and the red light being associated with the predetermined maximum thickness.
58. A shredder according to claim 57, wherein the plurality of lights further comprises a yellow light, the yellow light being associated with a thickness that is in between the thickness associated with the green light and the thickness being associated with the red light.
59. A shredder according to claim 55, wherein the plurality of indicators of the progressive indicator system comprises a plurality of audible signals.
60. A shredder according to claim 50, wherein the controller comprises a microcontroller.
61. A shredder according to claim 50, wherein the detector comprises a contact member that extends into the throat and is actuated in response to the article being inserted into the throat.
62. A shredder according to claim 61, wherein the detector further comprises a strain gauge configured to measure movement of the contact member and communicate the movement to the controller.
63. A shredder according to claim 61, wherein the detector further comprises a piezoelectric sensor configured to measure movement of the contact member and communicate the movement to the controller.
64. A shredder according to claim 61, wherein the detector further comprises an optical sensor configured to measure movement of the contact member and communicate the movement to the controller.
65. A shredder according to claim 64, wherein the optical sensor comprises an infrared LED and a dual die infrared receiver configured to detect the direction and amount of the movement.
66. A method for operating a shredder comprising a housing having a throat for receiving at least one article to be shredded, and a shredder mechanism received in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling the at least one article 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 method comprising:
selecting a type of material to be shredded via an input on the shredder, the selection determining a predetermined maximum thickness for the selected type of material;
determining if a thickness of at least one article being inserted into a throat of the shredder is at least equal to the predetermined maximum thickness for the selected type of material; and performing a predetermined operation if the detected thickness is at least equal to the predetermined maximum thickness.
67. A method according to claim 66, further comprising preventing power from powering a shredder mechanism of the shredder if the thickness is at least equal to the predetermined maximum thickness.
68. A method according to claim 66, further comprising emitting a signal to a user of the shredder indicating the thickness of the at least one article is at least equal to the predetermined maximum thickness.
69. A method according to claim 68, wherein the signal is an audible signal.
70. A method according to claim 68, wherein the signal is a visual signal.
71. A method according to claim 70, wherein the visual signal comprises illuminating a light.
72. A method according to claim 71, wherein the light comprises a red light.
73. A method according to claim 66, further comprising providing a visual signal that indicates whether the thickness of the at least one article is less than or at least equal to the predetermined maximum thickness.
74. A method according to claim 66, further comprising using a progressive indicator system to indicate a detected thickness of the at least one article within a range of thicknesses.
75. A method according to claim 74, wherein the progressive indicator system includes a plurality of progressive indicators, wherein each indicator is associated with a corresponding predetermined thickness of the at least one article within said range and including a maximum thickness indicator corresponding to the predetermined maximum thickness, wherein the progressive indicator systems activates the indicator associated with its respective corresponding predetermined thickness based on detecting that the thickness of the at least one article is at least equal to the corresponding predetermined thickness.
76. A method according to claim 75, wherein the progressive indicator system comprises a plurality of lights.
77. A method according to claim 76, wherein the plurality of lights comprises a green light and a red light, the green light being associated with a thickness that is below the predetermined maximum thickness, and the red light being associated with the predetermined maximum thickness.
78. A method according to claim 77, wherein the plurality of lights further comprises a yellow light, the yellow light being associated with a thickness that is in between the thickness associated with the green light and the thickness being associated with the red light.
79. A method according to claim 75, wherein the plurality of indicators of the progressive indicator system comprises a plurality of audible signals.
80. A method according to claim 66, wherein said sensing the thickness of the at least one article comprises detecting at least one movement of a contact member that is engaged by the at least one article in the throat.
CA2645569A 2006-03-22 2007-03-22 Shredder Active CA2645569C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2721620A CA2721620C (en) 2006-03-22 2007-03-22 Shredder

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11/385,864 US7798435B2 (en) 2006-03-22 2006-03-22 Shredder with oiling mechanism
US11/385,864 2006-03-22
US11/444,491 US7631822B2 (en) 2004-09-10 2006-06-01 Shredder with thickness detector
US11/444,491 2006-06-01
PCT/US2007/064601 WO2007109753A2 (en) 2006-03-22 2007-03-22 Shredder

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2721620A Division CA2721620C (en) 2006-03-22 2007-03-22 Shredder

Publications (2)

Publication Number Publication Date
CA2645569A1 true CA2645569A1 (en) 2007-09-27
CA2645569C CA2645569C (en) 2011-01-25

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CA2645569A Active CA2645569C (en) 2006-03-22 2007-03-22 Shredder
CA2721620A Active CA2721620C (en) 2006-03-22 2007-03-22 Shredder

Family Applications After (1)

Application Number Title Priority Date Filing Date
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Country Status (8)

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US (11) US7631822B2 (en)
EP (3) EP2036614B1 (en)
JP (1) JP5439167B2 (en)
CN (4) CN101844098B (en)
AU (1) AU2007226867B2 (en)
CA (2) CA2645569C (en)
DE (2) DE202007019389U1 (en)
WO (1) WO2007109753A2 (en)

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