GB2215236A - Paper shredder - Google Patents

Paper shredder Download PDF

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Publication number
GB2215236A
GB2215236A GB8805057A GB8805057A GB2215236A GB 2215236 A GB2215236 A GB 2215236A GB 8805057 A GB8805057 A GB 8805057A GB 8805057 A GB8805057 A GB 8805057A GB 2215236 A GB2215236 A GB 2215236A
Authority
GB
United Kingdom
Prior art keywords
paper
sensor
shredder
discharge path
shredding means
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
GB8805057A
Other versions
GB8805057D0 (en
GB2215236B (en
Inventor
Hermann Schwelling
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.)
HSM PRESSEN GmbH
Original Assignee
HSM PRESSEN GmbH
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 HSM PRESSEN GmbH filed Critical HSM PRESSEN GmbH
Publication of GB8805057D0 publication Critical patent/GB8805057D0/en
Publication of GB2215236A publication Critical patent/GB2215236A/en
Application granted granted Critical
Publication of GB2215236B publication Critical patent/GB2215236B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/24—Drives
    • 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
    • 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
    • B26D7/18—Means for removing cut-out material or waste
    • 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
    • B02C2018/0069—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents with stripping devices

Abstract

A paper shredder includes an infra-red sensor controlled automatic switching-off of a shredding mechanism drive when a waste-collecting sack (5), which has been hooked into a frame (6) to hang underneath the shredding mechanism (1) is filled to a predetermined degree. To provide this switching off, a switch (8) is arranged at the underside of the shredding mechanism and has the sensor (8a) directed towards a discharge path extending down from a cutting gap (Sp) between cutting cylinders (3) and strippers (4) of the shredding mechanism. <IMAGE>

Description

PAPER SHREDDER The present invention relates to a paper shredder.
In known paper shredders, it has been usual to undertake mechanical scanning of the degree of filling of the waste-collecting sack, namely by means of a pendulating flap which is arranged at the underside of the shredding mechanism and is coupled with a cutting cylinder drive in such a manner that the drive is automatically switched off at a preset flap deflection caused by the laterally widening cone of shredded paper before this cone reaches into the shredding mechanism exit gap.
Repeated shaking of the sack or flattening of the cone tip by hand can, however, lead to paper building up behind the flap and blocking the deflection necessary for the switching off the drive. This can cause the exit shaft to become blocked and the shredding mechanism may be damaged, especially during brief reverse running, by shredded paper drawn up from below.
It would thus be desirable to eliminate this disadvantage and the dangers connected therewith, in spite of manual action on the stack of shredded paper.
According to the present invention there is provided a paper shredder comprising paper shredding means operable to shred paper and to discharge the shredded paper downwardly along a discharge path, means to support a receptacle under the shredding means for reception of paper discharged therefrom, and an infrared sensor arranged below the shredding means and directed towards the discharge path to sense a state of filling of the receptacle and in response to sensing that state to provide a control signal to stop operation of the shredding means.
An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawing, which is a schematic sectional elevation of a paper shredder embodying the invention.
Referring now to the drawing, there is shown a paper shredder comprising a shredding mechanism 1 with two cutting cylinders 3 and strippers 4. Paper fed into an inlet E of the mechanism is shredded and discharged through a gap Sp between the cylinders downwardly along a discharge path and into a sack 5 hooked into a frame 6 to hang under the cutting mechanism.
An infrared proximity switch 8 is arranged at the underside 2 of the cutting mechanism 1 and has a sensor 8a directed towards the discharge path below the cutting cylinders 3 and strippers 4. The switch 8 is displaced laterally relative to the discharge path with the sensor 8a inclined from the horizontal towards the sack 5, the switch being mounted in a mounting S at the cutting mechanism underside 2. The inclination of the sensor 8a is such that its sensing surface, i.e.
its end face, extends approximately parallel te the adjacent flank 7a of the heap 7 of shredded paper building up underneath the gap Sp, the heap being of generally conical cross-section.
As soon as the heap 7, in particular its flank 7a, gets into a predetermined spacing "A" from the end face of the sensor 8a, this is damped and the drive of the cutting cylinders 3 is switched off by the resulting control signal.
Although manual smoothing of the top of the heap 7 leads to restarting of the cutting cylinders, it does so only until the heap 7 again builds up in the sack 5 to the new plane I or II, when the drive of the cylinders is again switched off. The heap 7 can thus never grow into the exit gap "Sp" and bring about the afore-mentioned disturbance or damage.

Claims (4)

1. A paper shredder comprising paper shredding means operable to shred paper and to discharge the shredded paper downwardly along a discharge path, means to support a receptacle under the shredding means for reception of paper discharged therefrom, and an infrared sensor arranged below the shredding means and directed towards the discharge path to sense a state of filling of the receptacle and in response to sensing that state to provide a control signal to stop operation of the shredding means.
2. A paper shredder as claimed in claim 1, wherein the sensor is laterally offset relative to the discharge path and inclined relative to the horizontal in a downward direction, the sensor being mounted in a mounting at the underside of the shredding means.
3. A paper shredder as claimed in claim 2, wherein the sensor is so arranged that a sensing end face thereof is substantially parallel to the adjacent flank of the heaped accummulation of shredded paPer that, in use of the shredder, is present in the receptacle substantially in said state thereof.
4. A paper shredder substantially as hereinbefore described with reference to the accompanying drawing.
GB8805057A 1987-03-02 1988-03-03 Paper shredder Expired - Fee Related GB2215236B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873706623 DE3706623A1 (en) 1987-03-02 1987-03-02 METHOD FOR THE AUTOMATIC DRIVE SHUTDOWN OF THE CUTTING DEVICE OF A PAPER DESTRUCTOR WHEN FILLED WASTE COLLECTION BAG AND DEVICE FOR IMPLEMENTING THE PROCESS

Publications (3)

Publication Number Publication Date
GB8805057D0 GB8805057D0 (en) 1988-03-30
GB2215236A true GB2215236A (en) 1989-09-20
GB2215236B GB2215236B (en) 1991-08-21

Family

ID=6322073

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8805057A Expired - Fee Related GB2215236B (en) 1987-03-02 1988-03-03 Paper shredder

Country Status (3)

Country Link
DE (1) DE3706623A1 (en)
FR (1) FR2628343B1 (en)
GB (1) GB2215236B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5954280A (en) * 1998-05-12 1999-09-21 Fellowes Manufacturing Company Top blocker for a paper shredder
EP1584430A1 (en) * 2004-03-17 2005-10-12 Ricoh Co., Ltd. Paper processing apparatus and image forming device comprising detection means for punch debris
US8028942B2 (en) 2008-08-01 2011-10-04 Fellowes, Inc. Bin full detection with light intensity sensing
CN105645170A (en) * 2014-11-28 2016-06-08 柯尼卡美能达株式会社 Sheet processing apparatus and image forming system
US9468933B2 (en) 2012-01-27 2016-10-18 Hermann Schwelling Shredder with turbo function

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3843602A1 (en) * 1988-12-23 1990-07-05 Gao Ges Automation Org PROCEDURE OR DEVICE FOR AUTOMATICALLY MONITORING THE DESTRUCTION OF THIN LEAF
DE4042544C2 (en) * 1990-03-17 1996-06-27 Schleicher & Co Int Document shredder
US5538194A (en) * 1990-03-17 1996-07-23 Schleicher & Co. International Aktiengesellschaft Document shredder
DE4201380A1 (en) * 1992-01-20 1993-07-22 Erika Benneckenstein DEVICE FOR COLLECTING SHREDDER GOODS
DE19641934C2 (en) * 1996-10-11 1999-06-24 Hermann Schwelling Switch flap for stopping the cutting unit of document shredders and. devices
AU714941B3 (en) * 1999-04-20 2000-01-13 Angelo Morgillo Shredding cabinet

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882770A (en) * 1973-08-31 1975-05-13 Edwin Mills & Son Limited Combined shredder and baler

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1112881A (en) * 1954-10-15 1956-03-20 Supply regulator for hammer mills, pneumatic conveyors and other suction devices
FR1369149A (en) * 1963-09-11 1964-08-07 Flow control for lumpy solids
DE1244535B (en) * 1963-12-14 1967-07-13 Miag Muehlenbau Method and switching device for controlling a mill
DE1954009C3 (en) * 1969-10-27 1979-09-06 Eba-Maschinenfabrik Adolf Ehinger Kg, 7460 Balingen Housing for a document shredder
DE2942241C2 (en) * 1979-10-18 1983-05-11 Feinwerktechnik Schleicher & Co, 7778 Markdorf Device for limiting the filling height of a container to be loaded
DE3312991A1 (en) * 1983-04-12 1984-10-18 Feinwerktechnik Schleicher & Co, 7778 Markdorf DEVICE FOR CRUSHING MATERIALS, LIKE DOCUMENTS ETC.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3882770A (en) * 1973-08-31 1975-05-13 Edwin Mills & Son Limited Combined shredder and baler

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5954280A (en) * 1998-05-12 1999-09-21 Fellowes Manufacturing Company Top blocker for a paper shredder
EP1584430A1 (en) * 2004-03-17 2005-10-12 Ricoh Co., Ltd. Paper processing apparatus and image forming device comprising detection means for punch debris
US8028942B2 (en) 2008-08-01 2011-10-04 Fellowes, Inc. Bin full detection with light intensity sensing
US8336792B2 (en) 2008-08-01 2012-12-25 Fellowes, Inc. Bin level detection with light intensity sensing
US9468933B2 (en) 2012-01-27 2016-10-18 Hermann Schwelling Shredder with turbo function
CN105645170A (en) * 2014-11-28 2016-06-08 柯尼卡美能达株式会社 Sheet processing apparatus and image forming system
CN105645170B (en) * 2014-11-28 2017-04-26 柯尼卡美能达株式会社 Sheet processing apparatus and image forming system

Also Published As

Publication number Publication date
GB8805057D0 (en) 1988-03-30
DE3706623C2 (en) 1989-12-14
FR2628343A1 (en) 1989-09-15
DE3706623A1 (en) 1988-09-15
GB2215236B (en) 1991-08-21
FR2628343B1 (en) 1991-08-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee