Abstract: An electromechanical abutment stop intended particularly for folding machines comprises of a coil (4) and a magnet (2) which are resiliently movable relative to each other. Disposed between coil (4) and magnet (2) is a damper plate (9) of softly resilient material as defined. The abutment sensor is characterized by low overall height. In a preferred embodiment, at least one surface of the damper plate (9) is occupied by projections (10), the shape of which can be used to determine the signal:mechanical pulse characteristic within wide limits, particularly so that the rise in the magnitude of signal will become ever smaller as the mechanical pulse becomes greater. By limiting the free length of travel .DELTA.x coil 4 or magnet 2), it is possible to confine the signal within an upper limit or threshold.

Abstract: In order to adjust desired web lengths between perforations, a perforating cutter (6) is used which consists of two mutually rotatable cutter discs (10 and 11) which can be fixed in the adjusted positions relative to each other. One cutter disc (11) has thereby a flat radial cutting surface (12) which constitutes the base of a flat truncated cone, the lateral face (16) of which corresponds to the inner lateral face (15) of a pot-shaped cutter disc (10), of which the outer lateral face (14) forms, together with the cutting face (12), a cutting edge (19) at which also terminate the lateral face (16) of one cutter disc (11) and the inner lateral face (15) of the other cutter disc (10). Provided in the cutting edge (15) and around the periphery are regularly equidistant cut-outs (24), of which the length and thus the length of the webs between the perforations can be adjusted by rotation of the cutter discs (10 and 11 ) in relation to each other.

Abstract: In order to cut through one or several sheets located wholly or partially on top of one another and guided, held by two transport conveyors, through a cutting zone in which a rotating cutting knife is arranged, of which the cutting edge is coordinated with the edge of one face of a cutting roller on the circumferential surface of which one transport conveyor is guided, with firm pressure and in order to achieve a precise cut, a pressure roller is provided, coordinated with the second transport conveyor and pressing it against the first transport conveyor, in the circumferential surface of which pressure roller an indentation has been made to accommodate the second transport conveyor and which extends axially, without contact, to the cutting plane of the cutting knife.

Abstract: A guide block (11) has a groove (16) with a flat floor cut into it, in which an endless belt (15) containing perforations (17) travels. A suction opening (18) opens into the floor of the groove (16), to which a vacuum is periodically applied by means of a valve (12). The endless belt (15) travels over a stack (1) of sheets (2) by means of guide rollers (4,5) and a drive roller (3). The vacuum, when periodically applied by the valve (12), operates through the perforations (17) so that the topmost sheet (2) of the stack (1) is sucked against the endless belt (15) and carried away in the same direction (28). One preferred form of the endless belt (15) is a toothed belt, with spaces between the teeth (21) that form vacuum chambers (22). With this compact and therefore easily positionable device, sheets (2) are sucked up from a stack (1) and transported away while maintaining their orientation, meaning that very high production rates are attained.

Abstract: For simple and rapid tightening of one or more presser belts of a continuous sheet feeder two support-levers are connected to a swivelling shaft next to the feeder frame, at the free ends of which the tension roller is pivoted. Furthermore, a tension lever is connected to the swivelling shaft. A holding member is slidably mounted on the swivelling shaft and can be fixed in any set position. One end of a spring engages the holding member and the other end is pivoted on the feeder.

Abstract: A folding machine comprises at least one folding unit including a plurality of conveyor belts (12), a stop member (14) extending transversely of the conveyor belts, a plurality of folding rolls disposed below the conveyor belts and extending parallel thereto, a folding blade adapted to be moved within a gap defined by the folding rolls, and a detector device (light barrier 16). The folding machine is characterized by a length-of-path pulse generator (22) coupled to the conveyor belts (12), a presettable counter (24) coupled to the length-of-path pulse generator (22), the start input (26) of said counter being connected to the detector device (16) and the distance between the detector device (16) and the stop member (14) at least equalling the length of the longest sheet to be handled, and a logic circuit (30, 36, 38) adapted to start the folding blade driving means (21) only upon the counter (24) reaching a predetermined count and upon the terminal edge of a sheet having passed the light barrier.

Abstract: A sheet deflector for noise reduction in multi-stage folding machines having first and second folding rollers (1,3) with a clearance space (5) between them, with said space (5) being in the path of a sheet (8) to be folded, comprising a sheet deflector (4) having a curved guide surface (20) for deflecting the sheet, at least one slot-shaped opening in the sheet deflector (4) extending toward the bottom of said curved guide surface (20) and extending towards an intake opening (7) between a third folding roller (2) and the second folding roller (3) and a blade-shaped slide (12) which can be horizontally moved out of said slot-shaped opening towards the intake roller opening (7) when the sheet deflector (4) is inserted between said first and second rollers (1,3), whereby the blade-shaped slide (12) is adapted to guide the sheet so that it is folded exactly and faultlessly with very little noise into the bite between first and second rollers (1,3).

Abstract: A device for pivoting the knife in its longitudinal axis and for adjusting the knife depth on knife folding machines having a coupling and brake unit disposed between drive motor and knife drive, for the upwards and downwards movement of the knife bar guided in a housing pivotable in the direction of rotation of the drive, characterized in that in the course of the driving axis there is between drive motor and the coupling-brake unit mounted on the housing an elastically deformable rotary joint and in that a substantially vertically extending guide plate is arranged to be rigid with the machine frame and in that for pivoting the knife there is at the bottom end of the housing a stay bolt, the space-forming length of which is adjustable between housing and guide plate, whereby there is in the upper part of the housing on the guide plate side and parallel with the drive axis, a horizontal pivot arbor which serves as a pivoting axis and in that to adjust the knife depth a substantially vertically disposed setscr

Abstract: A device for reducing the emission of noise in buckle folding units provided with noise control enclosures, comprising a noise control hood 5 essentially completely enclosing the upper 41 and lower folding pockets 42 and the folding rolls 7, said noise control hood 5 being at least partially slidingly displaceable, tiltable and/or removable and being provided with a slot for the passage of the sheet in the associated hood section, which slot is aligned with the nip of the pair of intake and discharge rolls, respectively, is improved by further reducing the noise emission in the sheet discharge area without influencing dependable function and easy access to this area.

Abstract: A fluid substance sprayer for spraying substances, such as liquids, paste, etc., includes a container for the substance with a lifting tube extending downwardly into the lowermost portion of the container and terminating at its upper end in a discharge fitting which includes a valve for closing off the lifting tube and opening it under the control of an actuator for the discharge of the substance out through a conduit terminating in a nozzle discharge. A filling tube is also provided on the interior of the container and it connects to a filling valve. A propelling gas, such as air, may be charged into the container through the valve to the top of the container above the substance level.