WO2001054820A1 - Method for destroying stacked sheets and device for carrying out said method - Google Patents

Method for destroying stacked sheets and device for carrying out said method Download PDF

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Publication number
WO2001054820A1
WO2001054820A1 PCT/EP2001/000761 EP0100761W WO0154820A1 WO 2001054820 A1 WO2001054820 A1 WO 2001054820A1 EP 0100761 W EP0100761 W EP 0100761W WO 0154820 A1 WO0154820 A1 WO 0154820A1
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WO
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Application
Patent type
Prior art keywords
characterized
stack
direction
sheet
device
Prior art date
Application number
PCT/EP2001/000761
Other languages
German (de)
French (fr)
Inventor
Bruno Weber
Gerd Dahle
Jochen Butz
Original Assignee
WILHELM DAHLE BüRO-TECHNIK GMBH & CO. KG
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.)
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16Details
    • B02C18/22Feed or discharge means
    • B02C18/2225Feed means
    • B02C18/2283Feed means using rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B02C2018/003Removing clips, pins or staples before disintegrating

Abstract

The invention relates to a method for destroying stacked sheets (1) according to which the sheets are mechanically individualized, grasped and cut. To this end, the down-most individual sheet (16) in the stack (1) is grasped in its center section (4) from below, is folded and removed from the stack (1) as a part preceding the stack (1) in the direction of conveyance (6) and is then supplied to a cutting tool (7) with the fold (5) of its center section (4) first.

Description

description

A method for destroying stacked sheet material and apparatus for the present process is carried out

The invention firstly relates to a method for destroying stacked sheet material present.

The technical specification of document shredders is the subject of the DIN standard 32757, which relates generally to the "destruction of information carriers" in the office and data technology. Shredders include a cutting mechanism. This usually comprises two motor-driven in opposite directions cutting rollers which engage with radially projecting cutting discs and fed on one side of the sheet material feed and discharge on the other side in the form of cutting strips as a result of the extermination process. further developments of such shredders are equipped to "cross cut" cut. The cut strips for the comminution of the resulting strip lengths are additionally cut transversely or chopped. is one matching feature of this conventional paper shredder that too zerschneidendes sheet material or consisting of several superimposed sheets of sheet material is supplied as a sheet stack to the cutting unit with a Blattgutkante or corner. The cutting unit engages the sheet material on this edge or corner and pulls it automatically by the cutting rollers therethrough.

Such paper shredders or their cutters are usually designed so that they destroy the fed sheet material in limited strength or stack height. Is supplied to the paper shredder sheet stack too thick, it causes blockage of the cutting mechanism. The elimination of such a blockade considerable problems. In general, the elimination is associated with significant pollution of the environment. Although technically it is not a problem, such

equip shredder with an increased destruction capacity. but this is costly and high costs affect the marketability of the paper shredder. The invention is therefore based on the object first to develop a method which allows even the destruction of significant Blattgutmengen with conventionally operating cutting works without major personnel expenses, when the cutting unit has a limited destruction capacity in conventional Blattgutzuführung. This object is achieved according to Claim. 1 The inventive method overcomes the destruction of Blattgutstapeln with a limited destruction-capacity cutting without the need for a longer service time required by staff.

The inventive method provides that the combined stack of sheets in a sheet material processed from bottom to top, that is, sheet by sheet, or at least in automatic succession of thin-walled sheet layer for thin-walled sheet layer is destroyed. The inventively provided or targeted destruction single sheet also allows the use of a vehicle equipped with less destruction capacity cutting mechanism to cope with even large quantities leaf. The required increased cost is negligible, because it only requires mechanical and no staff time.

The processing of a forthcoming for destroying sheet material stack is carried out in a procedure that successively each of the sheet lying in the sheet stack outside is destroyed. This is advantageous in the stack of sheets, the bottom sheet. The stack of sheets is suitably processed sheet by sheet from the bottom up, so destroyed successively. Thus, the cutting needed requires its full functionality only a limited powerful drive motor. This saves considerable costs, because the cost of the drive motor significantly affect the total cost of a cutting unit.

A special feature is that the sheet material is not as conventionally supplied with a sheet edge first to the cutting unit, but with the folding of a largely arbitrary surface structure, in particular a mid-range. This folding is first according to claim 2, a bending fold, wherein the in

The conveying direction is not bent toward the cutting mechanism anticipatory Blattgutteil but supplied with a folding buckle as produced by bending forward part of the cutting unit. There only detected by the cutting bending curvature is pressed when entering and passing through the cutting rollers to bend folding. Because this is usually a single sheet, supplied to the cutting bend or leaf curvature does not affect the ability of the orbiting and meshing cutting disks of the cutting rolls to detect the single sheet, the demarcated from each other by the approximately central folding side portions with a bending fold toward each other press and pull through by the cutting.

During the actual cutting process so the cut sheet is in the form of redundant with ultimately buckled fold. That means over the passage of a single sheet in a conventional shredder with the blade edge of effective werdendem cutting about a halving of the average duration when is widely assumed to be the same speed of the cutting rollers and the peripheral speed of its cutting discs and from a non-essential center of detection of the sheet ,

The general area of ​​detection of the forthcoming for destroying sheet of the sheet stack also means that the individual sheets of the stack of sheets need not be straight and arranged aligned in order to ensure the functioning of an taking place in the flow method detection of the impending destruction, outer sheet as the example of a in the fast feed is copying usual. The sheets lie stacked on each other can rather a completely different format, a different edge shape and have any orientation with respect to their format.

It can be due to the surface friction of the underlying individually successive sheet material occasionally not be avoided that, despite the detection surface only of the sheet outside or lying down in the sheet stack is detected in more than one sheet, and drafted. The prepared, however, in practice, no problems, even if it is not sought. Anyway, there is because of the principle of gripping the stack of sheets in the outer side, in particular lying in the bottom sheet

Area from the outside no problem with so-called dog-eared. Here, if of a flat grasping the stack of sheets lying on the outside or below the sheet is the speech, so the taking does not have to relate to the center of the sheet. A secure capture and removal of the sheet to be guaranteed in order not to interrupt the flow destruction.

Another process feature consists of claim 4 in that the gripped in a s surface area and discharged sheet is passed over when winding and feeding a suitably stationary stripping to strip about adhering staples or to existing Verklammerungsheftungen to solve with adjacent sheets by tearing and therefore if possible, the as. advantageously achieve desired ideal of a successive sheet destruction to 0th The effectiveness of the stripping edge not only for stripping deferred staples but also for tearing open interlocking Verklammerungen several superposed sheets is facilitated by the fact that the pending for destroying sheet stack is processed from bottom to top. Characterized namely the weight of the overlying sheet material weighs only approximately centrally 5 on the hood of the horizontal movement of subject sheet while the free, possibly stapled ends fall down unsupported or hanging and thereby inevitably come with its clamping in the catchment area of ​​the scraping edge. One only plugged and held by friction pressure clip is then stripped by being dragged over the bottom sheet on the scraping edge by 0 direct contact with the stripping edge. The Aufsteckklammer falls freely down into a laid down for its receiving receptacle, which is advantageously also the receptacle for the light emerging from the cutting mechanism to be cut.

If it is, however, a plurality of sheets passing through a form-fitting interlocking 5, the lower, horizontal drawn inwardly toward the passage gap sheet pulls the sheet end clamped with it and above it. The clamped ends resting bulge out downwardly and inwardly, because the resting not horizontally drawn leaves are held by the pressing device in the stack of sheets. They exert a significant, the withdrawal movement of the o lower sheet resistance counteracting pressure subjected to the clamping of the withdrawal movement, bottom sheet. This rising progresses withdrawal movement resistance pressure causes the clamping of the subject of the horizontal withdrawal movement of the bottom sheet ruptures jerky. Connected in practice with a clearly audible, pop-like sound. In this way, sheet by sheet, also a form-fitting interlocking dissolved and the last upper sheet of the Verklammerungsstapels adhering positive locking bracket is pulled down by direct contact with the stripping edge of the Abstreifbleches so that it falls within above-described manner directly into the waste container.

The isolated feeder sheet by sheet from the stack of sheets intended for the destruction to the cutting mechanism is to be ensured irrespective of the thickness of the stack of sheets. This requires a secure gripping of the stack of sheets lying in generally below the sheet by the person responsible for the detection of the sheet and their transfer to the cutting machine apparatus. Because of the often different outline shape or formatting of the stacked sheets which can particularly be problematic when the sheet stack is processed at a low stack height. Then, namely, the low on the bottom of the extractor to be taken leaf load counter-pressure from resting sheets and / or a pressing device. To avoid resulting problems for secure gripping of the stripping sheet is provided according to claim 5 to 7 in the present process that the stack of sheets of a shaking or vibration is exposed or can be exposed.

The other invention relates to a device for carrying out the method according to the invention. This device is characterized according to claim 8 by a bearing surface, in particular a bearing surface for the stack of sheet material, which contains in its center portion a through opening for grasping and pulling off the bottom of the stack of sheets lying respectively in sheet or by means of its central area. This contact surface is aligned horizontally generally, as for example is usually the case with a table surface. This need not be. It may be the contact surface, for example, also be inclined, without affecting about the processing of a style similar to only the contact surface stack of sheets from below, ie from its installation side, upward or outward. It is only important that the collection and further transportation means for respectively lying below in the stack of sheet material sheet by the approximately central passage opening in the bearing surface through is securely captured and conveyed to the cutting mechanism. Conveniently, the length of the passage opening in the bearing surface approximately corresponds to the length of the feed slot of the subsequent cutting work, so the throat width of the cutting mechanism. As a result, namely to ensure that the gripped and withdrawn from the stack of sheets in the sheet being pulled through the passage opening is not additionally folded. The longitudinal direction of the passage opening expediently extends parallel to the longitudinal direction of the inlet slot of the cutting mechanism, provide an additional Blattknickung characterized by additionally occurring resistance pressures to be avoided.

According to claim 12 the collection and conveyor device comprises two oppositely driven roller shafts, whose longitudinal axes extend approximately parallel to the longitudinal axis of the passage opening. The roller shafts are positioned below the bearing surface. They are fitted in the through hole with radially over its circumference also standing, coaxial drive rollers, which are in the range of the passage opening. The entrainer, for example, friction rollers are provided with a part of its periphery in the passage opening into it, and are effective in particular into the region of the surface of the bearing surface inside. The two roller shafts and their friction rollers are driven in opposite directions such that their facing peripheral regions towards one another in approximately the plane of the bearing surface of the sheet stack resting weggewandter conveying direction toward the cutting mechanism rotate. The effect of the acquisition and promotion of the bottom sheet in the stack of sheets is supported by additional loading of the tappet rollers with interlocking elements, such as a grain of sand circulation, or by being formed as Sägezahnscheiben according to claim. 13 and 14

Conveniently, the abutment surface forms according to claim 15 and 16, partly the bottom of an area bounded by side walls receiving box. This facilitates functionally correct destruction also a disordered layered sheet stack. Furthermore, the full functionality of the stack of sheets is a top biasing and thereby directed onto the contact surface pressure device as claimed in claim 17 ff. This pressure device ensures above all, the completeness of the destruction of the stack of sheets up to the last sheet. Suitably, the pressure device from the contact surface is mounted in this swung up, to freely hang up the next stack of sheets back onto the contact surface after processing of a sheet material stack. Conveniently, the pivot axis of the pressure device according to claim 19 in this case runs approximately parallel to the longitudinal axis of the passage opening.

Other design features of the pressing device and operatively cooperating with their contact surface are subject matter of claims 20 et seq. This should also be ensured that is loaded on both sides of the passage opening, regardless of its often irregular lamination structure of the stack of sheet material as evenly as possible in the direction of the contact surface, so that the friction rollers reach and Sägezahnscheiben of the roller shafts for detecting the underlying each sheet to its full effectiveness. Of significant efficacy in this sense is also the pivoting link according to claim 24, which is hinged on both sides between the contact surface and the pressing element of the pressing. Characterized the pressing element and, in particular regardless of its orientation are possible unaffected aligned from the stack mold approximately parallel to the contact surface, thereby effectively with full support on the stack of sheets on its two pressure surfaces. The rotary-slide joint between the pressing member and pivoting link allows a largely unaltered with this ideal full support of the pressure element to the contact surface substantially independent of the thickness of the stack of sheets.

The bending portion of the pressing member and the means for its production according to claims 26 to 28 are particularly effective when the stack of sheets approaches the end of its work-up and is therefore thin. The thinner it is namely, the stronger an outgoing from the bending area of ​​the pressing bulge of the center portion of the stack of sheets in the direction of the friction rollers of the roller rolling is pronounced. This facilitates the complete overhaul of resting on the contact surface sheet material stack to the last sheet. Also the purpose of the aforementioned work-up serves the Richtungsgehemme according to claims 29 et seq. It provides namely that the pressure device is maintained with their full, directed to the increasingly thinner in the course of the sheet stack of sheet material destruction weight pressure. Which makes this print must not be particularly large. With a largely full-surface charging both side areas ranging as pressure from the weight of the pressure device and its components for the desired effect. This is particularly the case characterized in that a re-pressing the sheet material stack high from the bottom upwards is prevented by the Richtungsgehemme. This then generates optionally an increase in the contact pressure when the Biattgutstapel should be pushed up by the detecting means. The possibility of eliminating the inhibitory effect of the Richtungsgehemmes according to claim 34 and 35 facilitates the redefinition of the contact surface with sheet material or a stack of sheets.

Claim 36 contain an appropriate structural configuration of the stripping edge for stripping of staples, such as may be typically positioned on a leaf edge, and measures to ensure their effectiveness. The bottom opening in the bearing surface is advantageous spatially directly connected to the receiving space for the destroyed sheet material, in order to collect the total waste concentrated.

In order to bring an adhesive to an underlying the withdrawal sheet staple in a best possible stripping position opposite the scraping edge, a is within the bottom opening effective additive system according to claim 37, with its configuration as a pad Spur according to claim 38 is an important significance.

The claims 42 to 46 dissolved in a particularly advantageous manner, the case situation of a desired single sheet destruction must be applied without causing the pressure device or about removed. This solution does not open namely a sheet feeder according to the novel process, but in a conventional manner by a single sheet can be fed to the cutting mechanism in a conventional manner with him facing sheet edge viz. In a preferred embodiment, the baffles normally placed in inactive position for the inventive implementation of the method need only be pivoted to its active position in which they facilitate threading of the to be destroyed single sheet through the direct supply or allow, through the funnel effect of the active position of the baffles in the free space between the platens 22,23.

The claims 47 et seq. Affect the structural design of the vibration actuator according to claims 5 to 7.

The invention is explained with reference to the drawings, for example. Show it:

Fig. 1 is a schematic side view of a suitable method for implementing the device. Fig. 2 is a detailed representation of a particular with respect to the

Embodiment of the pressure device modified or detailed embodiment, similar to Fig. 1. Fig. 3 is a side view similar to FIG. 1 and FIG. 2 with a plurality of functional positions of the pressing device. Fig. 4 is a further detailed in terms of the pressing side view analogous to FIG. 3. FIG. 5 is a perspective oblique plan view of a device for

Process implementation. Fig. 6 is a side view similar to Fig. 2 (as well as 3 and 4) with in addition to the forces acting on the device driving vibration.

The stack of sheets 1 is still relatively orderly shown in Figs. 1, 3 and 4 is of substantially horizontally layered cut sheets on to the horizontally aligned in the manner of a conventional desktop contact surface 2 of the Blattgutvernichtungsvorrichtung. The single sheets of the stack of sheets 1 are mechanically separated by the acquisition and conveyor 3 taken from the bottom of the stack of sheets 1 ago layer by layer in its central area 4 of the bottom, folded and discharged with the Faltscheitel 5 as in the conveying direction 6 ahead hurrying blade part from the stack of sheets 1 and the cutting unit 7 is supplied. The folding of the first Faltscheitels 5 is a bending fold (Fig. 1, 2) and does not buckle folding. The substantially horizontally extending plane stratification of the stack of sheets 1 is shown in Figs. 1, 2 and 4 clearly visible. The contact surface 2 for the stack of sheets 1 comprises in s their middle region 4 is a through-opening 8, through which the downstream of the bearing surface 2 positioned acquisition and conveyor 3 pass ranges from bottom to top and is effective above the contact surface. 2 The passage opening 8 has a width extension in the 9 (Fig. 5) effective feed width of the cutting mechanism 7 corresponding length, which is visible or estimated in the 0 perspective plan view of FIG. 5.

The detection and conveyor 3 comprises two oppositely driven in the directions of circulation 56.57 roller shafts 10, 11 whose longitudinal axes extend approximately parallel to the width extension 9 and to extend in the direction of the width extension 9 5 longitudinal axis of the passage opening. 8 Below the

Abutment surface 2 positioned roller shafts 10 are in their coaxial constructed as friction rollers drive rolls 12 in the passage opening. 8 They are effective with its peripheral region into the area of ​​the contact surface 2 into it.

0 The drive rolls 12 can have a soft rubber layer has a surface of its friction-increasing coating, for example.

The effectiveness of the roller shafts 10 and their drive rolls 12 is increased by concentric with the roller shafts 10 Sägezahnscheiben 54th The populated with saw teeth 5 Scope of Sägezahnscheiben 54 has an approximate arc of a circle shape. The circle center of this form is located on the longitudinal axis 11 of the roller shafts 10. The diameter of the approximately circular arc shape of the circumference of Sägezahnscheiben 54 corresponds approximately to the diameter of the drive rolls 12 so that the circumferential saw teeth protrude in the radial direction only slightly over the o circumference of the drive rolls 12th The bearing surface 2 is substantially formed by the bottom portions 51 and 52 of a limited by side walls 13,14, upwardly open receiving space for the stack of sheets. 1

The two roller shafts 10 run at a distance parallel to one another that their maintenance of and concentrically rotating with them driver rollers 12 and Sägezahnscheiben 54 an approximately 5 to 10 mm wide passage gap 15 for the Faltscheitel 5 of a stripped down and the discharged cut sheet 16 between form. The Faltscheitel 5 of the withdrawn sheet 16 lies between the two side portions 17,18. It remains in its in FIGS. 1 and illustrated curved folding mold 2 to obtain immediately before the entrance into the cutting disks 49 of the cutting unit 7 (Fig. 2). Through the first curved folding as a result of the center trigger of the lower single sheet 16 of the stack of sheets 1, the run length of the single sheet 16 is reduced by the cutter 7 practical to about half the sheet dimension, the single sheet 16 in the longitudinal extension 19 of the destruction apparatus prior to its removal from the stack of sheets 1 would have. At the inlet of the bent Faltscheitels 5 between the cutting disks 49 of the cutting unit 7 (Fig. 2) the convolution of the Faltscheitels 5 previously obtained in a bent form is converted by the detection thereof by the cutting discs 49 in a bending mold (not shown), in which the two side portions 17,18 of the single sheet are pulled flat top of one another together through the cutting unit 7 and cut into strips, as is the case with conventional cutting units. Here the cutting discs are functionally suitable for 49 "cross-cut" cut in order to exploit the receiving volume of the receptacle is not shown for the clippings optimal.

Above the resting on the contact surface 2 sheet material stack pressing device 1 an overall indicated with 20, acting on the stack of sheets 1 is arranged. The presser 20 is pivotally supported on the right side of the contact surface 2 about a horizontal axis 21st The pressure device 20 is illustrated in the sheet stack 1 be impinged position in FIGS. 3 to 5 in the pivoted and in Figs. 1 and 2. Fig. 3 comprises next to the upwardly pivoted position of the pressing device 20, two further representations of the pressure device 20 located in impingement.

The pressing device 20 includes two in tramping position (Fig. 1 and 2) the stack of sheets 1 respectively on either side of its middle region 4 which acts, separated from each other Andruckbereiche. Each pressing portion is realized by a pressure plate 22 and the 23rd The pressure plate 22 acted on almost the entire surface left with respect to the passage opening 8 side of the stack of sheets 1. The pressure plate 23 applied to the analog based right on the through hole 8 side of the stack of sheets 1 (Fig. 1, 2).

The platens 22,23 are each mounted about an pivot axis 21 of the pressure device 20 parallel swing axle 24 and 25 pivoted to the pressing device 20th Each swing axle 24,25 is positioned approximately centrally to her mounted or suspended pressure plate 22,23. Both

Pendulum axles 24,25 are part of the pressing member 26 of the pressure device 20, and this pressing member 26 is in turn pivoted on the right side of the contact surface 2 about the horizontal pivot axis 21 by means of the pivoting link 27th As shown particularly clearly and unambiguously depicted in the embodiment of Fig. 1, the pressing member 26, a central, extending over the central region of the stack of sheets 1 and horizontally aligned in pressing position substantially pressure frame which case the sheet stack 1 is approximately over its entire width extension 9 applied. The surface area of ​​the pressure device 20 and its pressure element 26 is particularly evident in the perspective view in Fig. 5.

The swiveling range of the two pressure plates 22,23 about their pivot axes 24 and 25 and 28 is limited in the embodiment of FIG. 2 to 5. In the figures, the push plates are 22,23 each substantially parallel to the carrying them shown pressure element 26th This is the middle position, out of which the two pressure plates 22,23 in the pivot direction 60 (Fig. 4.5) on both sides are pivotable about a suitably limited range. The pivotability of the two platens 22,23 as such from its illustrated central position on both sides in the pivot direction 60 is to ensure that the pressure plates 22,23 also lie at the entire contact surface of varying layer thickness or layer thickness of the stack of sheets 1 over the entire surface as possible on this, so that the contact pressure is effective over the entire surface of the pressure plates on the stack of sheets. 1 Limiting the pivotal range in the pivot direction 60 starting from the position shown in Fig. Center position should also ensure that the pressure plates illustrated 22,23 in a high swinging the pressure device 20 to the pressure element 26 their in FIGS. 3-5, a parallel position to the pressure element 26, at least approximated position maintained, in which they do not hinder a recharging of the receiving space for the stack of sheets. 1

The further pivot axis 28 between pressing member 26 and pivot link 27 is mounted for forming a rotary-slide joint approximately in the longitudinal direction 29 of the pivot link 27 at this slidable.

The pressing device 20 comprises between its two Andruckbereichen or platens 22,23 an addition standing in the pressing direction 30 or in the conveying direction 6 downward via the pressing member 26 bending portion 31 to the bulge of the center portion 4 of the sheet material stack 1 in the direction of the collection and conveyor. 3 the bending portion 31 of the pressing device 20 includes two juxtaposed, to the longitudinal axis of the passage opening 8 parallel bending rollers 32,33. Each bending roller 32,33 is positioned in the printing position (Fig. 1, 2 and 3 in part) of the pressing device 20 above one of the drive rolls 12 of the roller shafts 10. The bending rollers 32,33 urge the stack of sheets 1 each in the direction of one of the two drive rolls 12. They serve characterized the increase of the contact pressure of the stack of sheets 1 on the two drive rollers 12 and thereby increase the entrainment effect with respect to the lower, acted upon by them, sheet 24 in the stack of sheets. 1

The pressure device 20 is connected to a Richtungsgehemme at the abutment surface 2, performed in the pressing direction 30 which is approximately perpendicular to the contact surface 2 extending longitudinal guide. This longitudinal guide is basically by at least one side, preferably on both sides effective guide projections, in particular by a roller (not shown) in relation to the drawing figures, the vertical direction by insert in the vertical slots 59 of the side walls 13 (Fig. 5).

dip in pressure position (Fig. 1, 2 and Fig. 3.4, lower position), for example on both sides beyond the pressing element 26 of the pressure device 20 extends above guide rollers in the longitudinal slots 59 of the two side walls 13 of the receiving space for the stack of sheets 1 a. In this submerged position, the two vertically aligned slots 59 take over the longitudinal guide of the pressing member 26, which is also pivoted about the bearing axis 21st The bearing shaft 21 is indirectly effective in the embodiment according to FIGS. 2 to 5. The immediate bearing axis of the pressing member 26 is in the embodiment of FIGS. 2 to 5, the further pivot axis 28 which is supported from the outer end of the pivot link 27 as part of an effective there rotary-slide joint. This rotary shear joint ensures that the contact pressure element 26 over the entire surface loss over the entire height of to the last sheet to be processed from its maximum strength sheet material stack 1 within the receiving space above the contact surface 2 in the substantial parallel position on the stack of sheets 4 to the last sheet is.

The longitudinal guide described above contains an indirectly to the

Support surface 2 associated rack 35, with which a pressure element 26 mounted on the pressure device 20 gear meshes 36th Instead of a rack 35 also similarly acting form-locking member, eg a chain bar and, instead of the gear 36 and a friction wheel or a similarly acting rotary member may be provided. The Richtungsgehemme is on

Rotary bearing 37 of the gear 36 effectively so that it blocks facing in the mating surface 2 the direction of movement of the gear 36, namely, in the pressing direction 30, with respect to the figures, that is, in the counterclockwise direction, runs freely and in opposite direction, ie clockwise. Characterized the Richtungsgehemme the rotary bearing 36 locks the gear wheel 37 lifting the pressing device 20, as long as the gear 36 meshes with the rack 35th Thereby, the force acting on the pressure device 20 on the stack of sheets 1 contact pressure is increased as necessary. but the size of the contact pressure essentially corresponds approximately to the pressure exerted by the pressure device 20 and the pressure element 26 to the stack of sheets 1 weight load.

The meshing of the gear 36 with the rack 35 can be canceled in that the gear wheel 36 is mounted on the right end of a longitudinal slide 38th This

Longitudinal slide 38 is displaceable in the longitudinal direction 19 of the pressing member 26th The gear 36 facing away from left end 39 of the longitudinal slide 38 is acted upon by the right end of the mounted on the pressing member 26 hand swing lever 40 such that it is pulled in a pivoting of the hand swing lever 40 positioned at its left end of the pressure element 26 hand pivot axis 41 to the left , The manual pivot lever 40 engages with a fixed at its right bearing eye projection 42 positively on the left end 39 of the longitudinal slide 38 at. By a pivoting of the hand lever 40 pivot clockwise about the pivot lever shaft 41 of the longitudinal slide 38 with reference to Fig. 2 to the left is drawn such that the gear 36 is disengaged from the

Rack 35 comes. Characterized by the configuration of the pivot bearing 37 of the gear wheel 36 is lifted upwards blocking direction inhibition of the pressing twentieth In addition, the pressing device can now be freely pivoted in a clockwise direction 20 about the horizontal pivot axis 21 upwards (Fig. 4,5).

The bearing surface 2 is effective on both sides of the passage opening 8 and both sides of the collection area of ​​the collection and delivery device 3 in the passage opening 8 and from the weggewandter in their effective detection and conveyor 3 direction only over a certain range. There are the side, the two bottom portions 51 and 52. On the the passage opening 8 to the sensing and conveyor 3 facing away, in addition to the bearing surface 2 forming bottom portions pronounced bottom openings 53 51 and 52 present. These two base openings 53 are in the direction of elongation on the one hand by the bottom portions 51 and 52 and on the other hand by the two 19

Side walls 14 bounded. In the direction of the width extension 9 they are only limited by the two side walls. 13 Within the mutual bottom openings 53 should merely an auxiliary unit 55 for the sheet stack effect. This auxiliary unit 55 is an approximately centrally positioned and in the direction of the width extension 9 within the base openings in the direction of the longitudinal extension above the passage opening 8 edition spur 19th The support skid 55 is fixed to a respective side wall 14 of the receiving space for the stack of sheets 1 and protrudes from the side wall 14 in the direction of the passage opening 8 before. by

Limiting the effectiveness of the two support spurs 55 only in the middle region of the inside of the two side walls 14 and with a short protruding length of the stack of sheets 1 is hung by its both sides outer corners absence dortiger support somewhat downwardly over the level of the additional unit 55 down down. This is shown in Fig. 1, not shown in detail 2 and 4. This slight down slopes of the stack of sheets 1 in the region of its outer edges is desired.

Now, if the bottom sheet of the stack of sheets 1 is drawn from the collection and delivery device 3 in the direction of the passage opening 8 on both sides inwardly and when this lower sheet is clamped by a staple 61 with one or more, overlying sheet corners, then a above the bottom sheet lying, verklammertes sheets or so are located above the withdrawn bottom sheet clinched sheets clamped in their corner region entrained. Characterized bends or bend or to bulge entrained sheet corners 62 and side portions 18 of the blades down (Fig. 2 and 1). The clinched by the stapler 61 of the lower corner 63, exposed to the train sheet is pulled taut as a result of the pressure exerted by the bending or buckling of the entrained, resting sheet corner 62 resistance pressure. With increasing Einwärtszug of the bottom sheet of the stack of sheets 1, this Widerstandszug increased up to tear off the lower corner of the sheet 63 of the staple 61. This tearing is usually connected to a clearly audible Schnalzgeräusch. After tearing off the entrained corner of the sheet snaps 62 or fast entrained sheet corners 62 back toward its only slightly drooping down starting position. This snap-back is due to the inherent elasticity in bending the leaves. So a present usually at the blade corners clamping from bottom to top sheet by sheet is achieved in the manner described. With the uppermost, last sheet clinched the staple 61 is withdrawn inwardly toward the passage opening 8 and stripped by the outer boundary edge 64 of the contact surface 2 or of its two bottom portions 51, 52nd As a result, the mutual outer boundary edge 64 of the two bottom portions 51, 52 acts as a scraping edge.

The pressing device 20 further includes two parallel to the longitudinal side edges 43,44 of the through hole 8 of the bearing surface 2 aligned and in particular parallel to the bending area 31 of the pressure element existing 26 passthrough opening 45 (FIG. 3) positioned baffles 46,47 which consists of one of the Andruckseite retracted, more lying inactive position (Fig. 3, swiveled-pressure device 20) in a projecting beyond the bending area 31 or on the platens 22,23 of the presser 20 downward toward the pass-through opening 8 in the contact surface 2, more upstanding Leitstellung convertible (Fig. 3, avg. representation of the pressure element 26 and upper horizontal position of the pressing member 26). In activated Leitstellung the baffles 46,47 together form an acute angle 48 while in the retracted inactive position an obtuse angle 49 enclose between them (Fig. 3, above). In its acute-angled (48) Leitstellung the two baffles 46,47 form the pressure plates 22,23 positioned in the free space hopper as the initial and feeding aid to a cut sheet feeder to the cutting mechanism 7. This feeder is because of sufficiently large dimension linearized with running gap 15 between the two friction rollers 12 is possible with anticipatory sheet edge when no stack of sheets 1, blocks the passage through the passage opening 8 without hindrance.

The roller shafts 10 also contain a Richtungsgehemme between them the friction rollers and carried by them 12th This is designed such that there is a transmission of the in the conveying direction 6 effective rotary drive (not shown) of the roller shafts 10 locks to the friction rollers 12, but permits the rotation speed of the roller shafts 10 by increasing rotational speed of the friction rollers 12th This feature is of importance when the Faltscheitel 5 of the gripped, withdrawn from the stack of sheets 1 lower cut sheet 16 is detected by the cutting discs 49 of the two cutting rollers 50 of the cutting mechanism 7 and now with the rotational speed of the cutting discs 49 of the cutting rollers 50 of the cutting mechanism 7 by the cutting unit 7 is pulled. This pull-through is not to be hindered by an approximately reduced circumferential speed of the constant rotating in the conveying direction 6 friction rollers 12 may whose circumference are eventually biased by the two side portions 17,18 of passing through the cutting unit 7 lower, withdrawn from the stack of sheets 1 cut paper 34th

assigned to a non-illustrated in Fig. 6, the drive of the cutting mechanism 7 Drive shaft 70 is fixed to the eccentric disc 71st It runs in

Direction of rotation 72 of the drive shaft 70 to and acted upon by their relative to the drive shaft 70, the eccentric peripheral surface 73, the free end 74 of the drive lever arm 75 of the two-armed pivot lever 76. The two-armed pivotal lever 76 is pivotally mounted to the perpendicularly extending to the plane of pivot axis 77th The pivot axis 77 extends parallel to the axes of the

Cutting disks 49 of the cutting mechanism 7, the friction rollers 12 and supported on the hand swing lever 40 of the pushing device 20 the gear wheel 36. This held and the hand swing lever 40 supported by it by means of the bearing axle 37 toothed wheel 36 engages with increasing reduction of the height of the stack of sheets, that is, with increasing approach of the pressure plates 22,23 to the bottom portions 51, 52 of the bearing surface 2 increasing in the teeth of vertically oriented rack 35th The rack 35 is mounted in the vertical direction 78 longitudinally displaceable at the bearing surface 2 containing the sheet stack holding apparatus. The pivot lever 76 engages with the outer end 79 of its output drive lever arm 80 in a peripheral recess 81 of the rack 35 and thereby provides a driving connection forth. Furthermore, there is the outer end 79 of the output lever arm 80 of the swing lever 76 under permanent Zugfederdruck by the fixed on the holding device the tension spring 82. The tension spring 82 urges the pivot lever 76 in a clockwise direction about the pivot axis 77 such that the free end 74 of the drive lever arm 75 permanently is pressed against the peripheral surface of the eccentric disc 71st The tension spring 82 thus provides the permanent actuation of the pivot lever 76 by the peripheral surface of the eccentric disc 71 safely. The gear 36 is supported only at downward effective in the pressing direction 30 direction of rotation 83 in a counterclockwise direction relative to the counter-toothing of the rack 35 freely about its bearing shaft 37 relative to the pressure device 20 rotatably. In the counterclockwise direction 83, the free rotatability of the gearwheel 36 is locked by acting on the bearing axle 37 Richtungsgehemme. Clockwise, however, the Richtungsgehemme between the bearing shaft 37 and the gear 36 causes a complete transfer of the part of the eccentric disc 71 introduced into the pivot lever 76 and transmitted to the rack 35 pressure pulses through the gear 36 at a scale of about 1: 1 on the pressure device 20, more precisely said on the hand pivot arm 20 and thus to the two on the handle pivot lever 40 pivotally mounted pressure plates 22 and 23. the vibration pulses or vibration shocks generated by the eccentric disk 71 thus act in the vertical direction 78 to the top of the stack of sheets as a shaker drive and thus support a secure gripping of the bottom sheet of the stack of sheets by the friction rollers 12 even when the stack height of the stack of sheets is reduced, so the sheet stack nears its complete exhaustion, and the distance between the contact surface 2 and the bottom portions 51, 52 on one hand and the plates 22,23 of the pressing device 20 is always less than the other.

LIST OF REFERENCE NUMBERS

Stack of sheet material 44 side longitudinal edge

Abutment surface 45 passthrough opening

Detecting and baffle 46

Conveyor baffle 47

Surface area, the central region 48 acute angle

Faltscheitel 49 cutting disc

Conveying direction of the cutting roll 50

Cutting unit 51 the bottom area

Passage opening 52 bottom portion

Width extension 53 bottom opening

Roller shafts 54 Sägezahnscheibe

Longitudinal axis 55 additional conditioning, circulation Sporn

Tappet roller 56 circulating direction

Side wall 57 the direction of rotation

Side wall 58 sheet guide wall

Passage gap 59 slot

Blade 60 pivoting direction

Page area 61 Staple

Side portion 62 of the side end portion 18

Longitudinal extension 63 lower corner of the sheet

horiz pressure device 64 stripping edge boundary edge. Pivot axis 70 drive shaft

Pressure plate 71 press-eccentric

Pressure plate 72 press-on direction of rotation

Swing axle 73 peripheral surface

Swing axle 74 end

Pressure element 75 drive lever arm

Pivoting links 76 pivot lever further pivot axis 77 pivot axis

Longitudinal direction 78 vertical direction

The pressing end 79

Bending region 80 drive lever arm

Bending roller 81 peripheral recess

Bending roller 82 spring lower sheet 83 Drehsicherung.Gegenuhrzeigerric

Rack Pla

gear

Bearing axis, pivot bearing

Longitudinal slide left end

Hand pivoting lever

Manual swivel pin

head Start

Longitudinal edge

Claims

claims
1. A method for mechanically destroying stacked sheet material, which is taken from the outside, in particular from the underside of a sheet material stack (1) fro layer by layer, in particular sheet by sheet and a motor-driven
Cutting is supplied, wherein a stack of sheet material in the (l) outboard each blade (16)
- recorded in an area, in particular in a central region (4) from the outside, - folded,
- introducing discharged with the Faltscheitel (5) than in the conveying direction (6) anticipatory part from the stack of sheets (1) and in the cutting unit (7).
2. The method according to claim 1, characterized in that the fold (5) is a bending fold.
3. The method according to any one of claims 1 or 2, characterized in that the outer, in particular the bottom sheet (16) of the
Sheet material stack (1) extending in a direction transverse to the surface extension of the layers of the layer stack of sheets (1) direction (6) is discharged, and the cutter (7) is fed.
4. The method according to any one of the preceding claims, characterized in that the gripped and withdrawn sheet (16) and sheet position with the end (62) of at least one of the side portions (17,18) on either side of the costs associated with the sheet removal Faltscheitels (5 ) are, (a scraping edge 64) is passed over.
5. The method according to any one of claims 1 to 4, characterized in that the stack of sheets (1) is shaken by a vibration drive.
6. The method according to claim 5, characterized in that the vibrations from the drive of the cutting mechanism (7) are generated.
occurs 7. The method according to claim 5 or 6, characterized in that the vibration input by a biasing the stack of sheets (1) pressing device (20), in particular by variation of the contact pressure.
8. Apparatus for carrying out the method according to one of the preceding
Claims, characterized in that a contact surface (2), in particular a supporting surface for the
Stack of sheet material (1) in its central area (4) includes a passage opening (8) through which one on the contact surface (2) opposite side, in particular one below the contact surface (2) positioned capture and
Conveying means (3) is effective.
9. Device according to one of the preceding claims, characterized in that the stripping edge (64) by an outer edge of the bearing surface (2) for the stack of sheets (1) or by the outer edge (64) is formed itself.
10.Vorrichtung according to claim 8 and / or 9 for carrying out the method according to one of claims 1 to 7, characterized in that the cutting unit (7) comprises two cutting discs (49) and / or cutting teeth intermeshing and motor-driven in opposite directions cutting rollers (50) contains, which grip the sheet material applied to its detection area and transverse to the bearing surface (2) facing away from this by the cutting unit (7) pass through on.
11. Apparatus according to claim 10, characterized in that the passage opening (8) of the bearing surface (2) has an approximately the throat width of the cutting mechanism (7) corresponding length.
12. Device according to one of claims 8 to 11, characterized in that the detection and conveyor (3) outside, in particular below the bearing surface (2) comprises two oppositely driven roller shafts (10) whose longitudinal axes (11) approximately parallel to the longitudinal axis the passage opening (8) run, and that the roller shafts (10) coaxially carried by them
Drive rollers (12) are provided in the passage opening (8) and through the passage opening (8) passes into the region of the bearing surface (2) are effective.
13. Apparatus according to claim 12, characterized in that the drive rollers (12) equipped with interlocking elements, in particular as Sägezahnscheiben (54) are formed.
14. The apparatus according to claim 11, characterized in that the Sägezahnscheiben (54) protrude with circumferential serrations in a radial direction slightly beyond the periphery of drive rollers (12).
15. The device according to one of claims 8 to 14, characterized in that the bearing surface (2) by the bottom portions (51, 52) of one of side walls (13,14) peripherally limited receptacle space is formed.
16. The apparatus according to claim 15, characterized in that the bottom areas (51, 52) bordering the passage opening (8) on both sides.
17. Device according to one of claims 8 to 16, characterized by a in the direction of the contact surface (2) effective pressure device (20) for the sheet stack (1).
18. The apparatus according to claim 17, characterized in that the pressure device (20) on one side of the contact surface (2) about a horizontal axis (21) is pivotally mounted and the stack of sheets (1) towards the bearing surface (2) is applied.
19. The apparatus according to claim 18, characterized in that the pivot axis (21) runs approximately parallel to the longitudinal axis of the passage opening (8).
20. Device according to one of claims 17 to 19, characterized in that the pressure device (20) includes two separate Andruckbereiche, each of the stack of sheets (1) in the direction of the one of the two
Passage opening (8) flanking the bottom portions (51, 52) of the bearing surface (2) is applied.
21. Device according to one of claims 17 to 20, characterized in that each pressing portion is formed by a pressure plate (22,23) disposed about a the pivot axis (21) of the pressing device (20) parallel swing axle (24,25) pivotally connected at the pressing device (20) is mounted.
22. The device according to claim 21, characterized in that in the stack of sheets (1) be impinged printing position of the pivoting range is limited s either side of a parallel position of the push plates (22,23) to the bearing surface (2).
23. The apparatus of claim 21 or 22, characterized in 0 that each swing axle (24,25) approximately centrally to the associated pressure plate (22,23) is positioned.
24. Device according to one of claims 21 to 23, characterized in 5 that the swing axles (24,25) parts of a pressure element (26) of the
are pressing device (20) and that the pressure element (26) by means of a pivoting link (27) on one side of the bearing surface (2) is pivoted.
25. Apparatus according to claim 24, 0, that the pivot axis (28) for forming a rotary-slide joint in the longitudinal direction (29) of the pivoting link (27) at this slidably mounted between pressing element (26) and pivot arm (27) ,
5 26. Apparatus according to one of claims 8 to 25, characterized in that the pressure device (20) between its two Andruckbereichen (22,23) (a in the pressing direction on the pressure element (26) also projecting bending area (31) for protrusion of the central region 4 ) of the stack of sheets (1) contains 0 towards the detection and conveyor (3).
27. The device according to claim 26, characterized in that the bending region (31) of the pressing device (20) at least one, s particular two adjacent, to the longitudinal axis of the
(8) parallel bending axes or bending rolls (32,33) includes the passage opening.
28. The device according to claim 27, characterized in 0 that each bending roll (32,33) in the printing position of the pressing device (20) above one of the friction rollers (12) of the roller shafts (10) is positioned and the stack of sheets (1) in the direction of the friction rollers (12) acted upon.
29. The device running according to one of claims 17 to 28, s characterized in that the pressure device (20) connected to a Richtungsgehemme at one with the contact surface (2) in the pressing direction (30), in particular approximately perpendicular to the bearing surface (2) longitudinal guide is performed and that the Richtungsgehemme releases a longitudinal movement of the pressure device in the urging direction 0 and blocks in the opposite direction.
30. Device according to claim 29, characterized in that the longitudinal guide is connected with a contact surface (2) 5 form-locking member, for example, includes a rack (35), which enables on the
Pressing apparatus (20) mounted rotary member, for example meshes with a gear (36) whose effective as Richtungsgehemme pivot bearing (37) in the bearing surface (2) facing the direction of movement (30) runs freely and blocks in the opposite direction.
31.Vorrichtung according to claim 29 or 30, characterized in that the longitudinal guide by a slot (59) in a side wall (13) of the receiving space for the stack of sheets (1) is formed.
32. Apparatus according to claim 31, characterized in that the slot (59) associated with one of the pressing (20) guide projection, in particular performs a role.
33. Device according to one of claims 29 to 32, characterized in that the two mutually parallel side walls (13) comprise a longitudinal guide or form (rack 35, slot 59).
34. The apparatus of claim 29 or 30, characterized in that the direction of inhibition is canceled.
35. Device according to one of claims 30 to 33, characterized in that the rotary member (gear 36) by one hand to the pressure device (20) disposed pivot lever (40) can be brought into or out of engagement with the positive locking element (rack 35).
36. Device according to one of claims 8 to 35, characterized in that the bearing surface (2) on their sides facing away from the passage opening (8) outside of the bottom portions (51, 52) at least approximately parallel to a
includes the passage opening (8) and extending approximately over the length thereof extending bottom opening (53) and that the bottom opening (53) facing limiting edge of a bottom portion (51, 52) forming the scraping edge (64).
s is effective 37. Apparatus according to claim 36, characterized in that in the end opposite the passage opening (8) of the bottom opening (53) an auxiliary unit (55) for the sheet stack (1).
38. Apparatus according to claim 37, characterized in that the auxiliary unit (55) in the direction of the width extension (9) 0 within the base opening (53) positioned approximately centrally and in the direction of the
is the passage opening (8) protruding support spur.
39. The apparatus of claim 37 or 38, characterized in 5 that the additional unit (55) is inside from the outside in the direction of the passage opening (8) in the bottom opening (53).
40. Apparatus as claimed in any one of claims 37 to 39, 0 that the auxiliary unit (55) is on a side wall (14) of the receiving space for the stack of sheets (1) or fixed part of a side wall (14).
41. Device according to one of claims 37 to 40, characterized in that 5 outside both the passage openings (8) flanking the bottom portions
(51, 52) each having a bottom opening (53) in stationary in their outer region auxiliary unit (55) is present.
42. Device according to one of the preceding claims, o characterized in that the pressure device (20) comprises two in parallel to the longitudinal side edges (43,44) of the passage opening (8) aligned, movable guide plates (46,47) carries for guiding the sheet material.
43. Apparatus according to claim 42, characterized in that the baffles (46,47) from an inactive position out into a standing over the Andruckseite towards the passage opening (8) Leitstellung are convertible, in which it between the side walls of one (to the cutting mechanism form 7) directed towards the hopper to the single sheet implementation or for single-layer implementation of sheet material.
44. Apparatus according to claim 43, characterized in that the baffles (46,47) pivotally attached to the pressing device are mounted (20) such that they form in a retracted inactive position and an obtuse in an acute Leitstellung (48) angle.
45. Device according to one of claims 12 to 44, characterized in that the roller shafts (10) contain a Richtungsgehemme which blocks a transmission of the in the conveying direction (6) effective rotary drive of the roller shafts (10) on the drive rollers (2), but in a rotational speed of the roller shafts (10) allows excess rotational speed of the drive rollers (12) conveying direction (6).
46. ​​Device according to one or more of the preceding claims, characterized in that parallel to the passage opening (8) and a funnel in the direction towards the passage opening (8) projecting sheet guide walls (58) are hitched to the slot-like inlet opening of the cutting mechanism (7).
47. Apparatus for carrying out the method according to any one of claims 5 to 7, characterized by on a drive shaft of the cutting mechanism (7) arranged eccentric disc (71) for producing the vibrations.
48. Apparatus according to claim 47, characterized in that the eccentric disc (71) acts on the pressure device (20) of the holding device drivingly.
49. Apparatus according to claim 48, characterized in that the eccentric disc a drive lever arm (75) of a two-armed pivot lever (76) is applied, the output drive lever arm (80) the
applied pressure device (20) of the holder.
50. Apparatus according to claim 49, characterized in that the output drive lever arm (80) is applied substantially in the pressing direction (30) of the pressing effective longitudinal guide (20).
51. Apparatus according to claim 50, characterized in that the output drive lever arm (80) which as part of a relative to the
Pressing device (20) effective Richtungsgehemmes acted upon existing form-locking element (rack 35) in its longitudinal direction (30).
52. Apparatus according to claim 51, characterized in that the form-locking element (rack 35) in the longitudinal direction (30) is displaceably mounted relative to the cutter housing.
53. Device according to one of claims 49 to 52, characterized in that the pivoting lever (76) acting from a him against the eccentric disc (71) back pressure is acted upon.
54. Apparatus according to claim 53, characterized by a permanent spring pressure (82) as a restoring pressure.
55. Apparatus according to claim 54, characterized in that the pressure spring (82) acts on the output end (71) of the pivot lever (76) in the swing direction thereof.
PCT/EP2001/000761 2000-01-26 2001-01-24 Method for destroying stacked sheets and device for carrying out said method WO2001054820A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE2000103218 DE10003218B4 (en) 2000-01-26 2000-01-26 A method for destroying stacked sheet material and apparatus for the present process is carried out
DE10003218.4 2000-01-26
DE2000128546 DE10028546A1 (en) 2000-01-26 2000-06-06 A method for destroying stacked sheet material and apparatus for the present process is carried out
DE10028546.5 2000-06-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU3370501A AU3370501A (en) 2000-01-26 2001-01-24 Method for destroying stacked sheets and device for carrying out said method

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CN102631972A (en) * 2012-04-19 2012-08-15 东莞市邦泽电子有限公司 Automatic paper feeding mechanism, automatic paper feeding and shredding machine and automatic paper feeding and shredding method
US9776191B2 (en) 2013-09-25 2017-10-03 Hermann Schwelling Method and device for shredding sheet-shaped material
CN105642419A (en) * 2016-01-03 2016-06-08 安徽律正科技信息服务有限公司 Paper jam preventing protection device of paper shredder
CN107570315A (en) * 2016-07-05 2018-01-12 上海震旦办公设备有限公司 Autofeed paper shredder with clip and staple removal

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DE10003218A1 (en) 2001-08-09 application
DE10003218B4 (en) 2005-02-17 grant

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