DE2742906A1 - DEVICE FOR DESTRUCTION OF CARD-SHAPED INFORMATION CARRIERS OR DGL. - Google Patents

Description

LEINWEBER & ZIMMERMANN

PATENT LAWYERS

Dipl.-Ing. H. Leinweber Dipl.-Ing. Heinz Zimmermann Dipl.-Ing. A. Gf. v. Wengersky

RoMntal 7 · D-WM »MOndMn 2

2. Ascent (Kustermann-Passage) Telephone (069) 2603989 Telex 528191 lepatd Telegr.-Adr. Leinpat Munich

_the

23rd September 1977

S.E.D.I. Societe d'Exploitation de Destructeurs Industrieis,

923OO Levallois / France

Device for destroying card-shaped
Information carrier or the like.

The invention relates to a device for destroying card-shaped information carriers or the like consist of a pliable but inextensible material and have a substantially rectangular outline as well as a have extremely small thickness.

The automatic processing of information, which is becoming more and more prevalent, has in particular the establishment voluminous card indexes in which there are numerous entries, such as the identification number of a Social security or a bank account, each of which

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Provides access to a collection of data that is not only very different, but above all periodically must be brought up to date, e.g. in the case of benefits to the insured person or account movements.

Such a large amount of data cannot be stored in a computer memory, not even in a large peripheral memory The more so as such data are often stored reliably and for a long time due to legal obligations Time - up to ten years - must be archived.

Consequently, these data are conveniently recorded in graphical form and very densely packed on a carrier, which is space-saving, can be easily arranged for archiving and removed for a query and which consequently must be very stable with regard to its service life and manipulation. Convenient, carrier for recording one Large amounts of data divided into "modules" are microfilms, preferably in the form of individual easy-to-organize Microcarriers consisting of a rectangular card with an extremely small thickness and a practically indestructible synthetic one Material.

The destruction of such microcarriers after use is, however, a difficult problem because of their reduced format and their resilience, but above all because of the obvious need to destroy even the smallest information cell contained on them. The apparently simplest solution, namely to simply burn the microcarriers, is in fact not feasible because, on the one hand, they are incombustible in large quantities and, on the other hand, are made of a material that is highly polluting in the event of thermal decomposition. , _

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The invention seeks to solve this problem by mechanically destroying the microcarriers, more precisely, by breaking it into pieces so small that, on the one hand, the smallest information cells cannot be read and, on the other hand, the pieces can optionally be completely burned without harmful discharge.

The invention is therefore based on the object of creating a device of the type mentioned at the outset, whose The structure is simple and robust, does not require any adjustment and has a high hourly output despite low costs.

According to the invention, this object is essentially achieved by a rotatable inner drum and a concentric drum arranged stationary outer drum, the width of which is at least equal to one of the side lengths of the information carrier and between which a game is provided corresponding to the thickness of several information carriers, the inner drum longitudinally from the generating of its jacket, which evenly crosses the other side of the information carrier by one side Measure apart, door has at least two latches that are in radial direction are movably and elastically applied against the stationary outer drum, a milling machine whose axis is parallel ' to which the drums run and whose circumference is tangential to that of the inner drum, and cam bodies for pulling in the bar into the inner drum, when the bars reach the area of the milling machine, a distributor for periodic removal a package of information carriers stacked one above the other from a magazine and for tangential introduction between the Drums in the space between two successive bars of the inner drum and means for driving the inner drum and the milling machine and to operate the distributor synchronously with the

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Passing the bolt.

According to a preferred embodiment of the invention, you are on the one hand protruding from the rotatable inner drum Part of the bolt is designed as a comb and meshes complementarily with those provided on the inner circumference of the stationary outer drum ribs and grooves formed into a comb, and on the other hand the milling cutter is made up of disks of different diameters, which are arranged alternately next to each other and with complementary ribs and grooves on the circumference of the Comb the rotatable inner drum.

In this way, the microcarriers cannot escape fragmentation despite their small thickness and flexibility or cause clogging, and it is not necessary to adjust the tolerances between the mutually movable and to keep the parts of the device that contribute to the guidance and comminution of the microcarriers very small.

According to a further embodiment of the invention, the mentioned distributor has a shaft in which the to be destroyed Microcarriers are stacked on top of one another and, for example, easily removed from the bottom by gravity Manhole exit, as well as a flat slide with a double-pointed end that is a reciprocating rectilinear Movement above the bottom of the shaft in a parallel to the microcarriers and with play tangential between the drums lying plane executes, wherein the slide carries pawls, which during the insertion movement of the slide between evade the microcarriers and on the return movement to remove and insert a package below the Stack of lying microcarriers between the drums take effect.

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The arrangement and design of the slide is guaranteed

a perfect and even supply of the device

without the risk of a malfunction such that a microcarrier is forgotten or torn to pieces.

Further details, advantages and features of the invention emerge from the following description and the drawing, express reference is made to all details not described in the text. Place in the drawing dar:

1 shows a longitudinal section through an embodiment according to the invention,

Fig. 2 is a plan view of the device of Fig. 1,

3 to 7 sections in the peripheral area of the device along the planes which are provided with corresponding reference numerals in FIG. 1, and

FIG. 8 shows a section along the plane which is provided with the same reference number in FIG. 7.

It should be noted here that in the drawing the radial scale in comparison to the other proportions is greatly exaggerated for the sake of readability.

The device according to the invention has essentially, as shown in FIGS. 1 and 2, two concentric ones Drums 10, 20, which are used for transporting and guiding calibrated packages from a microcarrier 50 with a distributor 40 equipped magazine 30 are used, the packages for a dismantling of bars 60 against a milling machine 70

be pressed.

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These microcarriers are essentially rectangular cards K with side lengths LxI (in practice 150 χ 105 now) and with a very small thickness (about 15/100 mm) made of a flexible but inextensible material, i.e., that they are dimensionally stable, wear-resistant or abrasion-proof and durable, at least for a period of several Years. Such cards are generally made from special cardboard or are made of cellulose or certain synthetic ones Polymers are built up and carry information in graphical form on a quasi-microscopic scale recorded by printing, photography (microfilms) or perforation (classic punch cards). In practice it will be These microcarriers are increasingly made of synthetic material, on which the elementary information in one size 1/100 mm or less can be recorded photographically, electronically (scanning) or optically (laser).

The destruction of such microcarriers is indispensable for moral reasons, but if they do Should be done economically, difficult technological problems because of their dimensions and mechanical and chemical properties on, whereby it must also be taken into account that it must be ensured that the fragments are so small that they can no longer contain any meaningful information.

The device according to the invention meets these requirements by combining simple technological solutions, which in particular have the result that no setting outside of the norm and no part with systematic wear and tear required are.

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The device has a stationary outer drum 10 which is supported by a base 12 connecting side walls 11 to a cover plate 13. A rotatable inner drum 20 is concentrically arranged in the stationary outer drum and has spokes 21 extending from a hub. The hub is freely rotatable on an axis 23 fixedly connected to the side walls 11 or other stationary supports. As is clearly shown in FIG. 3 and the following figures, the drums 10, 20 each have opposing ribs 14 _f 24 and grooves 15, 25 on their circumference, so that a maximum distance I and a minimum clearance J exist in the radial direction is, the latter being equal to the thickness of, for example, a pack of fifteen cards K stacked one on top of the other.

The magazine 30 is formed by a simple wall 31 which has a vertical cross section corresponding to the Cards K limited right-angled slot in which the cards are stacked and then simply moved by gravity each time wander down when a card package 50 has been removed through the distributor 40 at the foot of the stack, the thickness of which is the same as above Match J mentioned above.

The distributor 40 consists essentially of a flat strip-shaped, parallel to the cards and for example to its greatest side length L lying slide 41, which is a rectilinear reciprocating movement in one Executes plane that is at the level of the foot of the shaft 32 of the magazine 30 and tangential to the inner circumference of the outer drum 10 whose upper part is at the same level. The ar-

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end of the slide, namely that which penetrates the foot or the bottom of the magazine 30, forms one in two Regarding the tapered tip, i.e. it has an upper bevel and two beveled sides. Due to its arrangement and its shape, the slide 41 can easily be placed in the foot of the stack of cards stored in the magazine 30 are introduced and separate a package 50 located below its underside therefrom.

In order to introduce this card package 50 between the drums 10, the slide at the rear end of its Tip 42 has two lateral pawls 43 articulated on pegs 44, which because of their parallelogram shape behind the thickness of the slide, but due to their imbalance they tend to move with their rear and lower, a stop forming end to run in grooves 45 to the edge that previously when penetrating the slide from the Take stacks of detached card packets 50 with you. To enable a sufficient slide path for this effect, among other things, shows the front one Wall of the magazine 30 has an opening 46 of smaller width than that (1) of the K cards.

Finally, the slide 41 can also have teeth on its upper side so that it can pass through the distributor 40 can be moved back and forth.

Each card package 50 discharged in this way in the magazine 30 is then passed through the distributor 40 during the Return movement of the slide 41 guided between the stationary outer drum 10 and the rotatable inner drum 20,

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more precisely in the game J, the one between their respective opposing Ribs 14, 24 is present, as can be clearly seen from FIGS. 4 and 5.

Each card package 50 brought between the drums 10, 20 in this way is secured by one of the bolts 60 of the rotatable inner drum 20 conveyed, as shown in particular in Figures 1 to 6. The arrangement of these latches and you Cooperation with the drums form an essential part of the invention, because as a result - regardless of the manufacturing tolerances and excessive signs of wear increase must - eliminates any risk of cards escaping from a package.

Each bar is formed by a punched plate 61, which is in one of the spokes 21 in the axis the inner drum 20 provided radial slot 26 is displaceable and its outwardly projecting part teeth 62, which engage in the grooves 15 on the inner circumference of the outer drum 10 and are separated by recesses 63, which are normally aligned with the back of the ribs 24 on the outer circumference of the inner drum 20. Thwart this way the teeth 62 of the bolt 60 in the radial direction the play J, by which the drums are separated, and prevent inevitably that any card of the card package 50 escapes in the circumferential direction.

The latches 60 are pressed into this radial position by springs 64, which are attached to the plates 61 and Stop strips 66, which are guided freely over the bottom 27 of the radial slots 26 of the outer drum 20, interact (see Figures 6 to 8).

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The introduced in this way into the space between two successive bars of the inner drum 20 Packets of cards 50 fill the game for the stationary outer drum 10, as clearly shown in FIGS. 1 and 4 to 6 is. Each card package 50 enclosed in this way is pushed against the milling machine by the rotation of the inner drum 20 70 out, which ensures a comminution by cutting.

The milling cutter 70, the axis of which is parallel to that of the drums 10, 20, is along the lower generatrix of the drums arranged in such a way that their parts with the largest diameter are tangent to the outer circumference of the inner drum 20. For in the event that the latter is smooth, the milling cutter 70 - as shown in FIG. 1 - can be a five-start cylindrical worm milling cutter be made of steel made extra hard with cobalt. Preferably, however, and as shown in Figures 7 and 8, the milling machine is made of saw tooth disks 73, 74 different Diameter built up on one and the same axis 71 with alternating diameter and joined by a fastening wedge 72 can be secured. The saw tooth disks 73, 74 would come with the ribs and grooves 24, 25 on the outer circumference the rotatable inner drum 20.

From Figures 7 and 8 it can be clearly seen in this case that no part of the microcarriers of the package 50 Crumbling by the milling cutter 70 can counteract, without paying particular attention to installation tolerances or signs of wear ought to be respected. Indeed, those trapped between the drums and driven by the bolt can be Despite their small thickness and flexibility, microcarriers cannot be passed through the milling machine without being destroyed,

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the more so as each saw tooth disc 73 _t 74 engages at a different angle and a different height (see FIG. 8) and each attack zone is separated from the adjacent one by the discontinuity of the angle and the height to which the microcarriers cannot adapt under any circumstances .

Obviously, the bolts 60 must for their part avoid the milling cutter 70. For this, theirs can be used in an advantageous manner elastic arrangement in the radial slots 26 of the inner drum 20 are utilized by making suitable in the area of the milling cutter Cam body are provided. In a particularly simple embodiment illustrated in FIGS. 7 and 8 are arranged laterally and loosely on the axis 71 of the milling cutter cam disks 80, which are in engagement with the Stop strips 66 protrude from the plate 61 outwardly beyond the side walls 11 of the outer drum 10. One Another possible arrangement consists in providing the cams in question on the inside of the side walls 11 in a vertical plane to the milling machine or in the area thereof.

In Fig. 1 the drive means of the various movable members described above are shown.

A motor M drives the milling cutter 70 at high speed via a belt No. The same engine is in use of reduction members N1, N2 and a belt R connected to the axis 23 of the rotatable inner drum 20, the although it runs in the same direction as the milling cutter, it does so at a significantly lower peripheral speed. This axis is Connected via a synchronous power transmission S to a device T which converts the movement and supplies the distributor 40

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drives such that the slide 41 reciprocates in phase with the passage of the latches 60. The one shown here Drive device is not mandatory and can be modified.

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Claims (10)

Patent claims: 1J Device for destroying card-shaped information carrier or the like, which are made of a flexible, but inextensible material and a substantially rectangular Outline and extremely thin, characterized by a rotatable inner drum (20) and a stationary outer drum (10) arranged concentrically therewith, the width (l) of which at least equal to one of the side lengths (L, 1) of the information carrier is and between which a game (J) is provided corresponding to the thickness of a plurality of information carriers, the Inner troraiel (20) along generators of their coat, the evenly around the other side length (L) of the information carrier Exceeding the amount apart, carries at least two bolts (60) that are movable in the radial direction and are elastically urged against the stationary outer drum (10), a milling cutter (70) whose axis (71) is parallel to that of the drums runs and whose circumference is tangential to that of the inner drum, and cam body (80) for retracting the bolt into the inner drum (20) when the bolt arrives in a vertical plane to or in the area of the milling machine, a distributor (40) for the periodic removal of a package (50) of stacked information carriers from a Magazine (30) and for the tangential introduction of the package between the drums in the space between two successive ones Bolt (60) of the inner drum (20) and MiUeI (M, N1, N2, R, No, S, T) for driving the inner drum (20) -14- 809813/0951 ORIGINAL INSPECTED 7742906 and the milling cutter (70) and for actuating the distributor (40) in synchronism with the passage of the bolt. 2. Device according to claim 1, characterized in that that the portion of the bolt protruding from the rotatable inner drum (20) has teeth (62) which mesh with complementary ribs (14) and grooves (15) on the inner circumference of the stationary outer drum (10). 3. Apparatus according to claim 1 or 2, characterized in that the milling cutter (70) is constructed by an alternating row of disks (73 _f 74) of different diameters, which are formed with complementary ribs (24) and grooves (25) on the outer circumference the rotatable inner drum (20). 4. Device according to claims 2 and 3 _t, characterized in that the ribs (14, 24) and grooves (15, 25) of the two drums are distributed in the same way over their width and in each case opposite one another. 5. Apparatus according to claim 1 or 2, characterized in that the milling machine (10) is a five-start worm milling machine, the cylinder jacket of which is tangent to the smooth outer circumference of the inner drum (20). 6. Device according to one of the preceding claims, characterized in that the distributor (40) is a magazine (30) in the form of a shaft (32), the horizontal cross-section of which corresponds to the outline of the information carrier (K), which are stacked therein so that they can move down freely, as well as a flat slide (41) with a Tip (42), which is in a parallel to the information carriers, 809813/0951 -15- lying above the foot or the bottom of the shaft (32) and running tangentially between the drums with play Horizontal plane executes a straight, reciprocating movement. 7. Apparatus according to claim 6, characterized in that the tip (42) of the slide (41) is double-pointed, that is, it has two lateral beveled edges and at least one inclined surface. 8. Apparatus according to claim 6 or 7, characterized in that the slide (41) at the rear end of its Point (42) has two lateral latches (43) that each time disappear or evade behind its thickness, when the slider penetrates the stack of information carriers, but falls back and takes effect during each return movement are to remove the package of the lower information carrier separated from the stack by the pusher and between bring in the drums (10, 20). 9. Device according to one of the preceding claims, characterized in that the distributor (40) and the milling cutter (70) are arranged along the upper and lower generatrix of the drums. 10. Device according to one of the preceding claims, characterized in that the inner drum (20) and the Milling cutters (70) run in the same direction of rotation at very different peripheral speeds. 109813/0951