A digitally-controlled oscillator includes a base frequency generator having an odd number of base inverters connected end-to-end to generate an output signal that oscillates at a predetermined frequency and a frequency-adjusting unit connected to the base frequency generator. The frequency-adjusting unit includes a first string of switchable inverters connected in series with each other, the switchable inverters having sizes that decrease from an input end of the first string to the output end of the first string.

Embodiments provide a multi-phase voltage controlled oscillator (VCO) that produces a plurality of output signals having a common frequency and different phases. In one embodiment, the VCO may include a passive conductive structure having a first ring and a plurality of taps spaced around the first ring. The VCO may further include a capacitive load coupled to the passive conductive structure, one or more feedback structures coupled between a pair of opposing taps of the plurality of taps, and one or more current injection devices coupled between a pair of adjacent taps of the plurality of taps.

The present invention discloses an Oven Controlled Crystal Oscillator and a manufacturing method thereof. The Oven Controlled Crystal Oscillator comprises a thermostatic bath, a heating device, a PCB and a signal generating element, where the signal generating element is used for generating a signal of a certain frequency, the heating device, the PCB and the signal generating element are mounted in the thermostatic bath, the signal generating element is mounted in a groove formed on one side of the PCB, while the heating device is mounted against the other side of the PCB that is opposite to the groove. The signal generating element may be a passive crystal resonator or an active crystal oscillator. The Oven Controlled Crystal Oscillator according to the invention is advantageous for a small volume and a high temperature control precision.

An atomic oscillator includes: a gas cell which includes two window portions having a light transmissive property and in which metal atoms are sealed; a light emitting portion that emits excitation light to excite the metal atoms in the gas cell; a light detecting portion that detects the excitation light transmitted through the gas cell; a heater that generates heat; and a connection member that thermally connects the heater and each window portion of the gas cell to each other.

An oscillation device is provided. The oscillation device includes: a main circuit portion, a heating unit, first and second crystal units, first and second oscillator circuits, a frequency difference detector, a first addition unit, an integration circuit unit, a circuit unit configured to control an electric power to be supplied to the heating unit, a compensation value obtaining unit, and a second addition unit. The compensation value obtaining unit is configured to obtain a frequency compensation value for compensating an output frequency of the main circuit portion based on an integrated value output from the integration circuit unit, and based on a change in the clock signal due to a difference between the temperature of the atmosphere and the temperature setting value of the heating unit. The second addition unit is configured to add the frequency compensation value to a frequency setting value.

An integrated structure of compound semiconductor devices is disclosed. The integrated structure comprises from bottom to top a substrate, a first epitaxial layer, an etching-stop layer, a second epitaxial layer, a sub-collector layer, a collector layer, a base layer, and an emitter layer, in which the first epitaxial layer is a p-type doped layer, the second epitaxial layer is an n-type graded doping layer with a gradually increased or decreased doping concentration, and the sub-collector layer is an n-type doped layer. The integrated structure can be used to form an HBT, a varactor, or an MESFET.

A method, an apparatus, and a computer program product are provided. The apparatus tunes a frequency provided by a VCO. The apparatus determines a relative capacitance change associated with a first frequency and a desired frequency from a look-up table. The apparatus adjusts a capacitor circuit in the VCO based on the determined relative capacitance change determined from the look-up table in order to tune from the first frequency to the desired frequency. The apparatus determines that the frequency provided by the VCO is a second frequency different than the desired frequency after adjusting the capacitor circuit. The apparatus performs an iterative search to further adjust the capacitor circuit when a difference between the second frequency and the desired frequency is greater than a threshold.

A system is disclosed for a voltage controlled oscillator (“VCO”) having a large frequency range and a low gain. Passive or active circuitry is introduced between at least one VCO cell in the voltage controlled oscillator and the voltage source for the VCO cell which reduces a gain value for the VCO to maintain stability of the system.

Disclosed are a phase locked loop (PLL) of a digital scheme and a method thereof. More specifically, disclosed are a digital phase locked loop having a time-to-digital converter (TDC), a digital loop filter (DLF), and a digitally controlled oscillator (DCO), and that is designed to have a constant jitter characteristic at all times even though an operating condition of a circuit varies according to a process, voltage, temperature (PVT) change, and a method thereof.

A current output control device is provided that includes: a current cell array section including plural current cell circuits that are each connected in parallel between a first terminal (power source) and a second terminal (ground) that connect between the first terminal and the second terminal in by operation ON so as to increase control current flowing between the first terminal and the second terminal; and a code conversion section (decoder) that generates signals (row codes, column codes) to ON/OFF control current cells so as to change the number of current cells that connect the first terminal and the second terminal according to change in an externally input code and that inputs the generated signals to the current cell array section.

A ring oscillator circuit causing a pulse signal to circulate around a circle to which an even number of inverting circuits are connected in a ring, wherein one of the inverting circuits is a first starting inverting circuit, which drives a first pulse signal according to a control signal, another of the inverting circuits is a second starting inverting circuit, which drives a second pulse signal based on a leading edge of the first pulse signal, still another is a third starting inverting circuit, which drives a third pulse signal based on the leading edge of the first pulse signal after the second pulse signal is driven, and the first to third starting inverting circuits are arranged within the circle of the inverting circuits in order of the third, second, and first pulse signals in traveling directions of the pulse signals.

A ring-oscillator-based on-chip sensor (OCS) includes a substrate having a semiconductor surface upon which the OCS is formed. The OCS includes an odd number of digital logic stages formed in and on the semiconductor surface including a first stage and a last stage each including at least one NOR gate including a first gate stack and/or a NAND gate including a second gate stack. A feedback connection is from an output of the last stage to an input of the first stage. At least one discharge path including at least a first p-channel metal-oxide semiconductor (PMOS) device is coupled between the first gate stack and a ground pad, and/or at least one charge path including at least a first n-channel metal-oxide semiconductor (NMOS) device is coupled between the second gate stack a power supply pad.

The switching element is provided in a state of being electromagnetically coupled to the cavity resonator of the high frequency oscillator; the bias voltage applying terminal is connected to one electrode of the switching element; another electrode of the switching element is electrically connected to the cavity resonator (the anode shell in FIG. 1); the metal plate having a size enough for reflecting an electric wave to be transmitted before and after the switching element in a high-frequency manner is provided at any one end of the switching element; and by applying a bias voltage to the switching element and varying that, a reactance of the switching element is changed and a resonance frequency of the cavity resonator is varied. By this method, an oscillation frequency can be varied greatly relative to a small change in a bias voltage.

An enhanced negative resistance voltage controlled oscillator (VCO) circuit is provided, in which a parallel connection of a capacitor and a resistor configured to provide frequency-dependent transconductance is present across source nodes of a first pair of field effect transistors in which gate nodes and drain nodes are cross-coupled. The source nodes of the first pair of field effect transistors are electrically shorted to drain nodes of a second pair of field effect transistors of which the gate nodes are electrically shorted to the gate nodes of the first pair of field effect transistors. The parallel connection of the capacitor and the resistor includes a parallel connection of a capacitor and a resistor such that the net transconductance of the first pair of field effect transistors is less at low frequencies where thermal noise and flicker noise are dominant part of the phase noise than at the operational frequency range.

A vibration element includes a piezoelectric substrate including a vibrating section and a thick section having a thickness larger than that of the vibrating section. The thick section includes a first thick section provided along a first outer edge of the vibrating section, a second thick section provided along a second outer edge, and a third thick section provided along another first outer edge. An inclined outer edge section that intersects with each of an X axis and a Z' axis is provided in a tip section of the piezoelectric substrate.

An apparatus is disclosed that includes a first cross-coupled transistor pair, a second cross-coupled transistor pair, at least one capacitance unit, and an inductive unit. The first cross-coupled transistor pair and second cross-coupled transistor pair are coupled to a pair of first output nodes and a pair of second output nodes, respectively. The at least one capacitance unit is coupled to at least one of the pair of first output nodes and the pair of second output nodes. The inductive unit is coupled to the first cross-coupled transistor pair at the first output nodes and coupled to the second cross-coupled transistor pair at the second output nodes. The inductive unit generates mutual magnetic coupling between one of the first output nodes and one of the second output nodes and between the other of the first output nodes and the other of the second output nodes.

This invention relates to a novel rotary control valve with new joint methods and flow control mechanisms, inline-reparability and fully metal seals more particularly to a triple offset butterfly valve or ball valve with those features used for on-off and flow controlling under multiple extreme conditions or in severe services; such as the integrated gasification combined cycle under high temperature and pressure, Fluid Catalytic Cracking under high temperature over 1200 F with hard diamond like catalytic particles, shale fracking process under extreme high pressure and high velocity fluid with solid particles and corrosive additives and other critical applications for products life lasting 5 to 30 years like deepsea flow control systems and nuclear power plants and for the applications of millions cycles like jet or rocket turbine engine fuel delivery systems with high velocity fuel fluid mixed with highly oxidative gas under temperature 1365 F.

A solenoid valve includes a plunger, an actuating device, and an air tap assembly. The plunger is connected to the actuating device. The air tap assembly is secured to the actuating device and has a cavity. The air tap assembly includes a main body, and first and second tubes. The first tube protrudes from the main body and defines a first through hole. The main body defines a second through hole communicated with the first through hole and the cavity. The second tube defines a third through hole. The main body defines a fourth through hole extended from the third through hole and a fifth through hole extended from the fourth through hole to the cavity. The fifth and second through holes are parallel. The plunger head is used to seal the second and fifth through holes.

An assembly structure of an electronic control unit and a coil assembly of a solenoid valve for an electronic brake system connected to the electronic control unit having a printed circuit board and applying power to the solenoid valve. The coil assembly is penetrated to allow an upper portion of the solenoid valve to be fitted thereinto, and includes a cylindrical bobbin provided with a coil and a coil case. The electronic control unit is provided with a housing having an insertion groove and joined to the hydraulic control unit, the printed circuit board being disposed spaced apart from the coil assembly, and the housing is provided with an elastic member having one end contacting the printed circuit board and the other end contacting the coil case. The elastic member is configured with a coil spring to produce different elastic forces.

A butterfly valve (100) is provided. The butterfly valve (100) includes a valve body (103) including a valve bore (109) passing through the valve body (103), with the valve bore (109) including an upstream valve bore portion (109U) and a downstream valve bore portion (109D), a shaft bore (112), a valve shaft (121) located in the shaft bore (112) and extending substantially across the valve bore (109), and a valve flap (107) affixed to the valve shaft (121) and configured to be rotated by the valve shaft (121). The valve flap (107) is configured to rotate between a closed orientation blocking the valve bore (109) and an open orientation. The valve flap (107) is affixed on an upstream valve bore portion side of the valve shaft (121), wherein incoming fluid presses the valve flap (107) against the valve shaft (121).

The invention provides a hard seal plug valve, comprising a valve body, wherein a tapered plug is arranged in the valve body, a bonnet is arranged at an upper part of the valve body, a drive valve rod penetrates the bonnet, an elastic hold-down mechanism is sheathed on the drive valve rod and arranged on a plug bearing seat, the plug bearing seat is connected with the tapered plug, and the plug bearing seat is held down when the elastic hold-down mechanism extends; and the hard seal plug valve characterized in that a telescopic mechanism is sheathed on the drive valve rod, the plug bearing seat is pushed upward when the telescopic mechanism extends, a valve rod bearing seat is arranged at the bottom of the drive valve rod, ends of the valve rod bearing seat pass through a planetary reduction mechanism, and the tapered plug is connected with the planetary reduction mechanism and rotates with the drive valve rod by the planetary reduction mechanism. In the invention, the tapered plug can reliably float and rotate under any circumstances. The drive torque of the plug valve is at least 7 times less than that of a general plug valve, therefore, when a motor is used, a general valve requires 2 minutes from opening to closing, and the valve of the invention only requires 3.8 seconds.

A ball valve which can suppress the increasing of processing labor time and reliably prevent simultaneous rotation of a ball seat and a ball when the ball is rotated by handle manipulation is provided. The valve body 2 is formed of a hard material such as stainless steel, the ball seat is formed of a relatively soft material such as a fluorine resin, and a protrusion 18 is formed on a ball seat support surface 13 of the valve body 2 made of a hard material so as to bite into the ball seat 4.

The invention provides a switching valve having a valve element which is movable in a housing, an actuating apparatus acting on the valve element in a first direction and a spring apparatus charging the valve element in a second direction. According to the invention, the first and second directions are in opposition and the spring apparatus has a progressive spring characteristic.

An outflow valve (10) for an aircraft has a frame (12) for arrangement in an opening (14) of an outer shell (16) of the aircraft, a first flap (18) pivotably arranged in the frame (12) for controlling a flow cross-section of at least one first inflow opening (24) and at least one outflow opening (15). To achieve a simplified construction of the ventilation system of the aircraft, the outflow valve (10) has a second inflow opening (26) configured to be closable by means of a drivable adjustable member (28).

A flush adaptor for use with a valve fitment assembly for dispensing liquids from a container; wherein the flush adaptor comprises an outer ring-collar; a flange with an edge molded to the bottom of the outer ring-collar; an interior ring-collar adjacent to the outer ring-collar; a ridge molded in the interior ring-collar; a seat molded onto the interior ring-collar and a pin molded into the interior ring-collar which keeps the valve in an open position; and a hollow tube molded into the adaptor to allow the flow of liquid through the adaptor and into the fitment assembly; whereby the flush adaptor allows for cleaning of the assembly and any tubes connected thereto.

In a method for operating a fluid valve for controlling or regulating a fluid, having at least one movable valve component is displaceable with the aid of at least one electrical actuating signal which contains at least one first actuating signal portion which causes an oscillating valve motion of the valve component. Pressure oscillations generated in the fluid due to the oscillating valve motion are detected, and are used for regulation of the oscillating valve motion caused by the first actuating signal portion.

A fuel system valve assembly may include a housing, a spring, and a body. The housing may have a fuel passage defined in part or more by a fuel passage wall. The fuel passage wall may have a seat and a cylindrical section. The cylindrical section may have a constant diameter and may be located downstream of the seat. In use, the body may reciprocate linearly in the housing between an open position and a closed position. The body may be biased to the closed position by the spring. The body may abut the seat when the body is in the closed position.

A steplessly adjustable hydraulic insert valve has a housing defining a radial direction and an end side in an installation direction. An inflow connector on the end side is connectable to a pressure medium source. First and second working connectors and a return connector are arranged in the radial direction. The return connector is connectable to a pressure medium tank. The housing has an axial bore and an actuator guided movably therein. The actuator can be held in an axial center position by at least one spring and is adjustable steplessly axially out of the center position by controllable actuation. At least one of the working connectors is fluidically connectable to the return connector by axial adjustment of the actuator. The actuator has a radial widened portion with first and second control edges for steplessly opening and/or closing first and second radial openings, respectively, of the return connector.

Pressure relief/drainage valve for a concrete pumper having a valve body with an axially extending passageway through which concrete flowing in a pumping line passes, an outlet port in a side wall of the passageway, and a valve member which prevents concrete from passing through the port when the valve is a closed position and permits concrete to discharge through the outlet port when the valve is in an open position.

A fluid control valve includes an inflow channel for introducing fluid, an outflow channel for discharging the fluid, a valve seat, a valve body for blocking/allowing communication between the inflow channel and the outflow channel in association with a movement thereof into contact with or away from the valve seat, and a solenoid configured to apply a magnetic force to the valve body, the magnetic force being generated in response to supply of electric power to the solenoid. The inflow channel is formed through the core of the solenoid so that the core and the fluid comes into contact with each other in the inflow channel.

A filler assembly is mounted in an axial hole of a cap of a valve. The filler assembly includes at least one first filler and at least one second filler stacked in a longitudinal direction. A valve rod received in the axial hole extends through the at least one first filler and the at least one second filler. At least one of two mutually abutting faces respectively of the at least one first filler and the at least one second filler is at a non-parallel angle to a radial direction perpendicular to the longitudinal direction. If one of the at least one first filler and the at least one second filler is subjected to a pressing force in the longitudinal direction, at least one of the at least one first filler and the at least one second filler is moved in the radial direction to press against the valve rod.

A butterfly valve including a valve body having a passage, a valve shaft assembly, a valve plate, and a tube that is friction fit inside the passage is provided. The valve shaft assembly includes a first shaft portion and a second shaft portion. The first and second shaft portions are in opposing spaced relation with the valve plate disposed therebetween. The valve plate has a flange such that when the butterfly valve is in the closed position a seal is formed with the tube, which is disposed within the fluid flow passage. The valve plate has lip extending from a portion of the valve plate that is radially outward from the circumference of the tube. The lip acts to reduce flow induced torque experienced while the valve plate is actuated from the closed to the open position.

A seal member for an aseptic coupling device includes a cross-sectional area including a first end portion, a middle portion, and a second end portion opposite the first end portion, the middle portion being thinner in radial dimension than the first and second end portions.

An apparatus includes a light foil device configured to move based on radiation pressure associated with light received by the light foil device. The apparatus includes a mechanism configured to transition between operational states in response to the movement of the light foil device, or includes a valve configured to control a flow of material through a conduit based, at least in part, on the movement of the light foil device.

Water valves and methods of regulating fluid flow for low ambient pressure water sources that reduce the amount of filtration needed for valve mechanisms operating in the water source.

In a control device for a technical processing plant, a pneumatically driven actuator having an actuator stem is provided together with a valve operated by the actuator, the valve having a valve stem. A valve element is attached to the valve stem. A stem connector connects the two stems to each other for a forced transmission of axial actuating movements and for modifying an axial distance between adjacent ends of the valve stem and the actuator stem to adjust a total axial length of the two stems. The stem connector comprises two half-shells connected to each other, and two positioning devices are provided for a friction-locking coupling of the half-shells to the respective ends. At least one of the positioning devices is designed to modify an axial attachment position of the half-shells along one of the stems.

The invention relates to a valve actuator (2), comprising a magnetic core (6) with an interspace (8) and at least one bifurcating branch (7), at least one variable magnetic field generating device (16), at least one permanent magnetic field generating device (13) and at least one movable magnetic component (12), wherein the bifurcating branch (7) defines a first region (4) and a second region (5) of said magnetic core (6). Said movable magnetic component (12) is movably arranged within said interspace (8) of said magnetic core (6) in such a way that a first gap (19) is formed between a first surface (23) of said movable magnetic component (12) and a first surface (22) of said interspace (8) of said magnetic core (6), a second gap (20) is formed between a second surface (24) of said movable magnetic component (12) and a second surface (25) of said interspace (8) of said magnetic core (6), and a third gap (21) is formed between a third surface (27) of said movable magnetic component (12) and a third surface (26) of said bifurcating branch (7) of said magnetic core (6). At least one of said variable magnetic field generating devices (48, 49) is associated with said first region (4) of said magnetic core (6) and at least one of said permanent magnetic field generating devices (13) is associated with said second region (5) of said magnetic core (6). Said valve actuator (2) is designed and arranged in a way that a magnetic flux, generated by at least one at least one of said variable magnetic field generating devices (16) is able to exert a force on said at least one movable magnetic component (12) and is able to cancel the magnetic flux (48, 49), generated by at least one of said permanent magnetic field generating devices (13). At least one magnetic flux limiting means (7, 12) is provided, whose magnetic flux limit can be reached or exceeded.

An electromagnetic valve with an electromagnetic circuit includes a coil wound onto a coil former, a core, a magnetic return device, a valve closure element, a guide pin, and an armature which is substantially hollow. The armature is mounted so as to be movable with an inwardly directed face on the guide pin. The armature acts at least indirectly on the valve closure element. The guide pin comprises a surface. The surface is arranged to point radially outwards so as to form a first part directed towards the core and a second part directed towards the armature. The first part is configured to be magnetized. The second part is configured not to be magnetized. A control edge is formed between the first part and the second part.

A side valve having a lateral connector, comprising an outer sleeve and an inner sleeve that has an attachment section for attachment on the outer sleeve side, as well as a connector piece for connecting to a water supply. The outer sleeve and inner sleeve are connected with one another by way of a separate connection piece, onto which the connector is formed.

A drain plug assembly that has particular application for sealing a drain hole in a high voltage battery compartment on a vehicle. The plug assembly includes a plug that inserted into the drain hole. The plug assembly further includes a return spring coupled to the plug and causing the plug to be biased into the drain hole. The plug assembly also includes at least one shape memory alloy device coupled to the plug and a support structure. The SMA device receives an electrical current that causes the device to contract and move the plug out of the drain hole against the bias of the return spring.

A solenoid valve, the magnet armature of which is designed to be movable relative to a first valve-closing element, for which purpose the first valve-closing element is accommodated telescopically in a coupling element attached to the magnet armature, wherein the coupling element is guided along the inner wall of a guide sleeve inserted in the valve housing in order to align the magnet armature precisely with the first valve-closing element in the direction of a second valve-closing element which is likewise accommodated in the guide sleeve.

A valve, in particular a vacuum valve, in which, in order to close a passage opening, in particular of the valve, at least one closure member can be moved by a valve drive, starting from a maximum open position, in which the closure member opens the passage opening at least partially, first on a first partial path into an intermediate position, and the closure member can be moved, starting from the intermediate position, on at least one second partial path which is angled away from the first partial path into a closed position, in which the closure member closes the passage opening, the valve drive having at least two cylinder spaces which are loadable in each case with a pressure medium, at least one piston being mounted displaceably in each of the cylinder spaces, and the pistons being supported on one another by way of at least one prestressing element.

A valve assembly having a valve-seal on a valve member that moves between an open and a closed position within a valve support housing for controlling fluid flow, particularly for use as a shut-off valve. In many embodiments, advancing the valve member sealingly engages the valve-seal with a valve seating area of the housing to close the valve and shut-off fluid flow through the housing, while retracting the valve member moves the valve-seal away from the seating area to allow fluid flow around the valve-seal and through the valve-seating area. In many embodiments, the valve member includes a proximal handle and angled ramp that engage with a helical ramp of the housing to translate rotation of the handle into axial movement of the member between open and closed positions.

A flow control valve element has a generally spherical ball. An inlet is formed in the ball. An outlet is also formed in the ball, the outlet opposing the inlet. A hollowed-out portion extends between the inlet and the outlet. A pair of opposing flats are formed in the ball, the flats each having a first flat portion formed in an external portion of the ball and an opposing second flat portion formed in the hollowed-out portion of the ball.

In a processing machine including a processor having a processing blade and a receiver having a reception member and in which a blade edge of the processing blade and a reception portion, of the reception member, engage with each other to process a paper sheet therebetween, the processing blade is one processing blade selected from a blade group and is attached to the processor so as to be changeable to another processing blade of the blade group, reception portions of kinds corresponding to a plurality of kinds of the processing blades of the blade group are formed on the reception member, and the processing blade attached to the processor is positioned so as to be in a position where the blade edge is engageable with the reception portion of the corresponding kind.

A method and device for the production of books, including: moving book blocks successively along a conveying section of a book production line; supplying a stack of book cases to the book production line; identifying a marking on each of the book blocks and the book cases; transmitting an identified marking on at least one book case to a machine control of the book production line; assigning a dataset stored in the machine control for a sequence of book cases to the supplied stack; determining a sequence in the machine control for book blocks positioned on the conveying section; comparing the dataset for the sequence of the book cases to the sequence of the book blocks; and removing and/or supplying at least one book block from or to the conveying section if the sequence of the book blocks deviates from the sequence of the book cases using the machine control.

A method for operating a processing system, in which product units of different formats are processed. The processing system contains a plurality of processing devices that are arranged one after the other in a processing line. In the event of a format changeover, certain component arrangements arranged in the processing system must be adapted to the new product format. In the event of an upcoming format change, a gap in the conveyed goods is generated while the conveying operation is maintained, wherein the gap in the conveyed goods runs through the processing system along the processing devices. As soon as the gap in the conveyed goods runs through a component arrangement to be adapted to the new format, the format is changed over at the component arrangement while the gap in the conveyed goods runs through the component arrangement.

A sheet handling apparatus includes a sheet folding unit configured to perform folding on a sheet; and a sheet stacking unit configured to stack the folded sheet on a sheet stacking surface having an inclined surface and a horizontal surface in order from upstream to downstream in a sheet conveying direction. A downstream end of the inclined surface is higher than an upstream end of the inclined surface with respect to a horizontal plane. The sheet handling apparatus also includes a discharging unit configured to discharge the folded sheet to the sheet stacking unit; a sheet conveying unit configured to convey the discharged sheet from the inclined surface to the horizontal surface; and a conveying force applying unit configured to apply a conveying force to the sheet in contact with an upper surface of the sheet from above the inclined surface.

The post-processing device includes: a binding unit that forms a cut in a sheet stack and cuts a part of the sheet stack into a predetermined shape to form a tongue portion in the sheet stack, the tongue portion having a part where one end part of the tongue portion is not separated from the sheet stack, and binds the sheet stack by bending the tongue portion and inserting the other end part of the tongue portion into the cut; and a sheet stack transport unit that transports the sheet stack in an orientation such that the one end part of the tongue portion in the sheet stack bound by the binding unit is on a downstream side of the other end part of the tongue portion in the sheet stack transport direction.

A supply device (10) for a machine for transversely cutting two strips (11 and 12) of a flexible material, in particular a strip of paper, moving continuously, to produce separate stacks of documents cut transversely according to predetermined formats. The device comprises lower and upper driving mechanisms (13, 14) associated with the two strips (11, 12) of flexible material respectively, which each include a mechanically rotated first roller (13a, 14a) and a freely rotatable second bearing roller (13b and 14b). The driving mechanism is mounted on a frame (15) supported by a movable platform (16) which is rigidly connected to a linear actuator (17) arranged to be moved transversely with respect to the direction of movement of the strips (11 and 12). Optical reading cells (11a, 11b, 12a, 12b) define the operating modes of the driving servomotors (13b and 14b) and of the linear actuator (17).