Abstract: The device comprises a lifting mechanism (1), a sheet-inserting means, means for detecting the front top level of the stack (32) connected to a computer acting on an electric motor (11) of the stack-lifting mechanism (1), and means for raising the stack (4). The detector (32) of the front level of the stack (4) comprises means for measuring the extent of variations in the level of the stack. The computer is also connected to a source of information (17) relating to the supply frequency in real time and to the nominal thickness of the sheets. The computer output is connected to a frequency-varying means for controlling the electric motor (11), the computer being designed so that the value of the signal appearing at its output is characteristic of the difference between the measured level of the stack (4) and the calculated level.

Abstract: The braking device comprises at least one flexible braking means (1) extending across the trajectory of the sheets (2) and mounted so as to pivot around a transverse axis (4) so that its trajectory around the said axis intersects the trajectory of the sheets (2), the direction of rotation of the end of the said flexible braking means (1) and intersecting the trajectory of the sheets (2) being opposite the direction of motion of the sheets, and also comprises drive means for pivoting the braking means (1) in dependence on the longitudinal dimensions of the sheets (2) and the frequency with which they pass. The means driving the braking means (1) around the said transverse axis (4) comprise a variable-speed electromagnetic actuator (5) connected to control means which in real time record the parameters relating to the longitudinal dimension of the sheets and the frequency with which they pass.

Abstract: A sheet-processing machine operating in cycles, inter alia a shaping press, during which a cyclic excess air pressure is produced in a covered part of the machine, where the covered part has an opening (6) on the perimeter of which a diaphragm is fixed, the diaphragm being made of an elastic material which is substantially impermeable and resistant to the oil lubricating the machine (9).

Abstract: This device comprises devices (11-13) for securing tools (10) to a supporting and heating plate (3). The heat exchange surface of the supporting and heating plate (3) is continuous, the securing devices (11-13) being arranged to permit securing of each of these tools (10) in any position within an adjusting range determined on the surface of the supporting and heating plate (3). This permits adjusting the position of, the securing the tools (10) to the supporting and heating plate (3). This device also comprises devices (7-9) for positioning the supporting and heating plate (3) on a removable frame (1) of a press for hot transfer of portions of metallic films onto a paper or cardboard substrate.

Abstract: The planar member for a stripping station for a machine for cutting sheet elements consists of a board which may be provided with openings if it is a stripping template, or if it is one of the upper or lower stripping boards is provided with working parts, on one surface and on an opposite surface is provided adjacent a downstream edge with a centering post and at least two mounting strips, an upstream edge of the member is provided with one or more mounting strips which strips protrude from the edges of the board and one of the sides of the board is provided with grasping handles. The planar member is mounted in a frame which has means for engaging the centering post and the mounting strips adjacent the downstream end so that the planar member is not subjected to warping.

Abstract: The planar member for a stripping station in a machine for cutting sheet elements consists of a board which may be provided with openings if it is a stripping template, or if it is one of the upper or lower stripping boards is provided with working parts, on one surface and on an opposite surface is provided adjacent a downstream edge with a centering post and at least two mounting strips, an upstream edge of the member is provided with one or more mounting strips which strips protrude from the edges of the board and one of the sides of the board is provided with grasping handles. The planar member is mounted in a frame which has means for engaging the centering post and the mounting strips adjacent the downstream end so that the planar member is not subjected to warping.

Abstract: A blower arrangement for detachment of a metallized belt from a sheet and for creating a braking force on a sheet, which belt and sheet are situated between platens of a press in a machine for printing sheet elements which comprises a bar arrangement near the exit of the press in which is provided a series of nozzles having the form of flattened parallelpipeds, each of these nozzles being sealed by a translational mobile cylindrical valve member movable perpendicular to an air supply duct with the valve member having a communication passage. The plane of the jets coming from the nozzles is directed approximately horizontally between the metallized belt and the sheet.

Abstract: An apparatus for processing used belts and bands of a machine for printing sheet elements comprises an accumulation bin having an upper portion for receiving the belts and bands from a supply arrangement and a lower portion provided with a grinder for grinding the belts and bands into small pieces. The grinder is automatically placed in operation intermittently under the control of a control arrangement, and the output of the grinder either discharges directly into a transport receptacle for the waste or into an evacuation pipe which conveys the waste to a transport receptacle at a remote location.

Abstract: A device for centering and locking tool-supporting frames has two centering points and one centering and locking point. The centering point as well as the point for centering and locking is equipped with a first and second centering locking device which includes a flexible rod provided with a handle and being anchored at its other end in an anchor block belonging to the movable cradle and being moved manually in a slot provided in a plate from a locking position to an unlocking position. The flexible rod extends through an upper part of the centering and locking pin, which engages in the groove for the centering points and in a groove and a bore for the centering and locking point. First and second centering and locking devices may be actuated simultaneously or individually.

Abstract: A device for unloading metallized belts comprises a pair of parallel arms rotatably mounted respectively between each of two lateral side walls of the last station of the machine. The arms are connected to one another by crossbeams, which may accept support levers for small-diameter bobbins. Each arm has a base plate for supporting the ends of the axles for the large-diameter bobbins. The device includes an arrangement for rotating the sub-frame formed by the arms from the operating position to an extended position, which has a portion of the arms extending out of the downstream end of the machine to enable exchanging bobbins.

Abstract: An arrangement for transporting metallized belts or bands in a machine for transferring the metallized images from the belts or bands onto a sheet comprises a support for the belt supply bobbins, advance rollers for intermittent unrolling and advancing the belts, guide rollers for guiding the belts between the platens and then a discharge state around one of the platens of the press, a tension roller for placing the belts under tension and an arrangement for removing the worn belts from the machine. The advance rollers are arranged in a parallel group downstream from the platen press and slightly above a plane of transport for the sheets through the press. The machine includes at least one window provided in at least one of the lateral walls of the frame of the machine above this group of advance rollers so that an operator may easily obtain access to the rollers for replacement of the bands and/or adjusting the position of the bands.

Abstract: A device for sidewise alignment of a flat workpiece on a table includes a lower pull member for moving a flat workpiece toward a side stop and a pad for pressing the flat workpiece onto the pull member. The pad is fitted above the pull member on a bar that is lowered when the flat workpiece is applied against a front stop, and this pad is movable in translation along an axis parallel to the pull member. A spring urges the pad back to its initial position when the bar is raised to disengage the pad from the surface of the workpiece. The pull member and bar extend over the whole width of the table and the pull member is arranged in a groove made along an upper surface of a crossbar of the table, whereas the sides of the bar are held by ends of lever arms which are mounted for rotation on sides of the table frame.

Abstract: A decelerating device for decelerating movement of die cut sheets into the delivery station of a sheet fed die cutter wherein die cut sheets are rapidly pulled along a substantially horizontal path into the delivery station and are abruptly stopped at predetermined stopping points including a rear tablet underlying the path of travel of the die cut sheets and movable toward and way from the predetermined stopping point to provide support for the trailing edge of a sheet passing into the delivery station in accordance with the length of the sheet and a deceleration brush positionable in the path of movement of the sheet into the delivery station which deceleration brush is carried by a movable carriage also carrying the rear tablet.

Abstract: A single-face station for a machine that produces corrugated cardboard comprises a frame which includes a stand with two lateral wall members, a lower cassette which carries a lower pressure roll being positioned on support and resting surfaces formed in the lateral walls, an upper cassette having a pair of corrugating rolls resting on the lower cassette and on guide surfaces in each of the side walls. The resting surface and support surface extend at right angles to each other and obliquely to a horizontal plane and the arrangement includes a holding arrangement to exert a downward force on anchoring points provided in a lower rear portion of the upper cassette in order to hold the upper cassette and lower cassette on their respective resting, supporting and guiding surfaces. In addition, there is an extracting arrangement for allowing the upper cassette to be withdrawn laterally from the frame.

Abstract: A suction table which, in a machine converting sheets into package, transfers the last, lowermost sheet of a batch to a subsequent processing station. The table is provided with numerous blowing and sucking nozzles and is fitted on a hollow frame movable with regard to a fixed distributory housing which provides sucking and blowing action. The housing comprises a distributory shaft and tubes movable with respect to the table and thereby sliding within corresponding guides formed in the frame. The shaft and tubes are provided with cooperating ducts which will allow the nozzles to suck or blow as required by the angular position of the distributory shaft and the position of the table.

Abstract: A device for correcting lateral alignment of a workpiece removed from a pile of workpiece prior to being fed into a processing machine. The device includes at least two pairs of rollers spaced along the direction of movement of the sheet, with each pair of rollers including a driven lower roller and a driven upper roller, with the upper roller having its axis forming a slight angle with the axis of the lower roller to provide a lateral force to move the workpiece against a lateral guide. The device can be used in the second arrangement providing front stops for aligning the front or leading edge of the workpiece after the lateral position alignment has been accomplished.

Abstract: A method and device are provided to prepare a cutting tool such as used for die cutting sheet material, by mounting the cutting members in a mounting support with the method and device controlling the operational stages of the preparation. The device includes improvements in the press which are that a plurality of individual pressure elements are arranged on a support surface of a lower bed in rows and columns to form a rectangular configuration with each of the elements being individually controlled so that different groups of elements can be actuated to act on a pressing plate depending on the size of the cutting tool being prepared. To insure an accurate and equal pressure, the elements in each corner are actuated with a low pressure to bring the pressing plate and the tool being acted on into contact with the pressure surface of the upper bed and then high pressure is applied to the selected pressure element to insure the securing of the cuttings blades and members into a support of the cutting tool.