Abstract: The cutting tool (3) formed by two cutter blocks (7) of a shredding machine has a stripping means with two stripping grids (10) located between the cutter blocks (7) and two stripping plates (11) located outside the cutting zone and which in each case engage in the gaps (9) between the cutting disks (8) of the cutter blocks (7). The stripping plate (11) associated with each cutter block (7) by one-piece construction is constructionally combined with the associated stripping grid (10), so that there is a very precise alignment of the stripping plate (11) with respect to the stripping grid (10) and all the stripping plates (11) and all the stripping grids (10) can be secured with common supporting plates (30).

Abstract: In a stripping means for shredding machines or the like with spaced interleaved cutting disks (5), primary strippers (8, 9 or 10, 11) closest to the cutting zone engage in a circumferential zone of the associated cutting roller (4), but only in every other annular slot (6). The intermediate annular slot (6) is occupied by strippers (9, 8 or 11, 10) at another circumferential zone of cutting roller (4). An advancing load of comminuted material does not simultaneously strike all the primary strippers over the entire roller length for stripping. Instead, the load strikes the strippers in time succession. The primary strippers form guide elements through which adjacent material flows (28, 29) of the comminuted material are spaced and then can optionally be brought together again for mixing purposes. As a result it is much more difficult to re-associate parts of the material flows or the particles forming the flows in attempting to recover the position of the comminuted parts in the non-comminuted original.

Abstract: A cutting tool for shredding machines has two cutting rollers meshing with cutting disks, which have "tooth on tooth" aligned, forwardly tilted, sloping sawteeth. At their tips, the teeth have notches, so that the tips are twice serrated. The slope of the teeth is such that when they engage in the material to be comminuted they face one another in substantially centrally loaded manner.

Abstract: In an electrically powered machine subject to occasional blockage, the speed, power consumption, torque and/or rate of deceleration are displayed by successive illumination of light-emitting diodes in a row. Predetermined limit values for these parameters alone or summed with one another are defined and optical couplers are positioned at corresponding locations on the row to detect parameters reaching the limits. Detection causes initiation of disconnection, braking, reversal or other means for alleviating the stoppage.

Abstract: A document shredder standing on a subframe has an outlet opening from which comminuted material falls into a basket. A swingably mounted flap loaded resiliently by a knee lever mechanism serves simultaneously as a full condition sensor against overfilling of the basket and as a closure for the outlet opening and in both these positions switches the document shredder off. It is brought from the closure position to the working position automatically on sliding in the basket, and on its removal into the closed position again.

Abstract: A shredding machine has a casing comprising an upper casing part, which is higher than the lower casing part, which has set back side walls compared with the upper casing part. Between the two casing parts is formed a supporting shoulder on which the machine is received in the opening of a frame of a stand. It can also be located on the supporting shoulder in the insertion opening of a built-in plate. Holders for a reception container for comminuted material are provided on the bottom of the lower casing part. An upwardly directed step close to the top of the machine permits a substantially surface-flush installation into a built-in plate.

Abstract: This invention relates to an apparatus for comminuting waste material comprising two driven and meshing cutter blocks formed from knife disks provided with recesses running in a transverse direction that cut into the knife disk surface. The apparatus can destroy or shred waste material such as paper files with a back width of about 7 centimeters without having to remove in advance metal clamping devices typical for files and file folders. The recesses provide an inclined running saw tooth profile, which continues as a staggered, or angled, profile in the neighboring knife disk; and each disk is provided with a saw tooth profile having inclined tooth sides enclosing an acute angle of approximately 80 degrees. Each tooth also has a cutting side, which at the same time forms a sliding surface for the waste material. A groove trailing each set of recesses cuts the elongated strips into short strips on the outlet side of the cutter blocks.

Abstract: The cutting arrangement for a paper shredder consists of two cutting rolls with interengaging star-shaped cutting discs. The points of the teeth of the cutting wheels extend approximately up to the groove base of the grooves adjacent cutting discs on the other roll. The cutting rolls, which in each case are arranged synchronized "tooth to gap" have an effective intersection surface relative to one another the real overlap between them which is substantially smaller in area than the overall theoretical intersection surface, i.e. the lenticular overlap between the outer peripheral circles of the cutting discs.

Abstract: The invention relates to a method for operating a shredding machine with high power for the comminution of multilayered paper, data carriers and the like with at least one drive motor and a stator winding, which upon overloading of the shredding machine automatically is switched to reverse. The operation of the machine is possible without fear of overloading the machine and the user has no need to nor temptation to grip with one's hand paper jammed into the shredding machine. The object of the invention is achieved by providing a second stator winding, which upon overloading of the shredding machine is initially connected in parallel to the one stator winding. Therefor, in case of overloading no switching into reverse occurs, but for a limited time of, for example, 10 seconds a second stator winding is connected in parallel to the first stator winding.

Abstract: A microfilm destructing apparatus with a case and with a feed shaft disposed at the case for feeding of one or possibly more film cards along a cutter plate to a rotating milling cutter, which disintegrates the film card into fine particles; and which a complete and interference free removal of the generated microfilm particles is assured. The exhaust shaft is connected near the output end of the milling cutter, and is also connected to a suction blower. An air stream passes through the air gap slot, which is formed between the milling cutter teeth and the tip of the cutter plate. A pressure air stream may be employed fed from the input side to the milling cutter or if a suction air stream is present, it functions at the output end of the milling cutter.

Abstract: A baling press has a filler opening and workpiece in which a press piston is movable between retracted and compressing positions. Elongated flexible warning bands or cords, preferably elastic, are attached to the press piston and engage apparatus on the housing for extension between the piston and an edge of the filler opening to provide warning against inserting material through the filler opening. The engaging apparatus on the housing may comprise a tension arrangement to maintain the warning bands or cords taut at all positions of the piston. The tensioning apparatus may comprise a spring-loaded arrangment or an arrangement wherein the bands or cords extend about one or more rollers and are tensioned by a weight. Only a limited area of the filler opening is covered in order to provide manual access therethrough. The bands or cords may be arranged in crossing or in parallel relation.

Abstract: The subject matter of the present invention is a feed door for a baling press with a vertical work direction, where at one press case there is fastened a press door tiltably at hinges, in order to bring material to be pressed into the work room of the baling press. The invention has the object to improve the feed door such that a large dimensioned feed opening is created upon formation of a lower support table attached horizontally tiltable at the press case, without that the feed door required for this purpose leads to a hindrance for the user of the press. For resolving the object set forth, the invention is characterized in that the feed door is separated along a horizontal line and comprises a lower and an upper part.

Abstract: An improved baling press with a vertical operating direction and with a press plate guided within a press case by means of rollers and cooperating coordinated guides, and with the press plate being solidly connected to spindle nuts, which in each case are crossed through by a driven press spindle; the baling press permitting the guiding of the press plate of the press case only along one wall thereof, while the other walls with the exception of the wall disposed above or below the drive are available for other use, such as corresponding feed openings. Thus, the guiding of the press plate of the press case is only along one wall of the press case, preferably the rear wall thereof.

Abstract: A closure indicator for the door of a baling press, comprising at least one switch finger disposed on the swingable part of the door, which switch finger is adapted to actuate one or more switching cams of electrical switches disposed in said baling press, and said switch finger actuates a disc cam having control surfaces which are situated under a spring-loaded electrical switching element.

Abstract: A clampable closure device for the press door (3) of a baling press comprises a lever (5) nonrotatably connected to a shaft (13) the other end of which is fixed to an end of eccentric lever (12). The other end of the eccentric lever (12) is fixed to a shaft (14) mounted on spaced apart bearing members (2) secured to the top of the press housing (1). Beams (6) each have one end rotatably connected to a shaft (13) and the other end of each beam (6) has an angled guide recess (10) receiving a traverse shaft (7) connected to the press door (3). Rotation of the lever (5) effects a clampable closure and locking of the press door (3) to the press housing (1). The device for the press door (3) may be used on conjunction with a filler slide (19) having an angle lever (20). Lever arm (22) effects retraction movement of a closure bolt (24 ) against the resistance of spring (26) to effect opening of the filler slide (19).

Abstract: A safety device is provided for a baling press, wherein a press piston or plate is reciprocable in a press housing, for inactivating a pressing plate drive when a filler lid is opened. The safety device has a switch disposed on the housing in a position which is remote from and is separated from the filler lid and the opening path of the lid, and has a lever pivotally mounting the lid with an arm of the lever extending oppositely from the lid, with a control rod connected with the lever means arm part to engage the switch by moving in response to opening movement of the lid to engage and operate the switch to inactivate the plate drive. The lever may be a two-armed angle lever pivotally mounted on the press housing, and the control rod may be connected with an energy store, typically a spring. The control rod may have an angled portion for operating engagement with a sensing roller of the switch.

Abstract: Apparatus for limiting the filling height of containers for receiving shredded or minced paper film or the like from cutting or shredding machines, characterized by a switch for stopping the machine when the container is filled to a predetermined height, the container being pivotally mounted with one side of its bottom edge on a housing and the opposite edge on a spring, and a switch controlling the operation of the cutting or shredding machine mounted in the path of the spring.

Abstract: A motor driven drive is provided for a press in the nature of a baling press which translates rotary motion into reciprocating pressing motion of a pressing plate. The translation of motion is through a drive system which is flexible and adjustably connected to the drive of the plate to assure minimized frictional operation of the plate by reason of a rotary and tilting type of drive screw mechanism. Electrical switch means is provided for controlling the actuation of the plate in accordance with the development of the bale which is being pressed.

Abstract: A drive for paper shredding or cutting apparatus having two counter-rotating cutting rollers each carrying a plurality of cutting knives, the knives of each roller being in engagement. Each roller is independently driven by an induction motor through a direct gear drive.