Abstract: A print medium sheet feeding system for an ink jet printer having a print head with a planar array of jets is provided by clamping the leading edge of a paper after it is passed through a printing zone to a rotating assembly of parallel disks. The sheet is pulled through the printing zone by rotating the disk with the clamp being carried with the rotating drum. A platen may be provided which has a flat surface in the printing zone forming a tangent to the outer surface of the rotating disks. Alternatively, the platen may be removed and the sheet held in tension between the clamp and a nip region formed by a spring plate held against a restraining plate. In an alternative embodiment, the sheet is initially clamped against the drum by the combination of a lever arm which is selectively engageable with the drum for rotation therewith and an attached actuating arm having a plate which secures a sheet to the drum surface.

Abstract: A device for driving an oscillating auxiliary gripper of a printing press includes a driven shaft having an eccentric portion thereon, the driven shaft being rotatably mounted on the side upright of the press and on the eccentric portion of which a cam-actuated auxiliary gripper shaft is rotatably mounted for oscillation thereon. A driven gear is rigidly secured to the driven shaft and meshes permanently with a drive gear that rotates with the impression cylinder to provide positively cooperating drive elements for introducing the desired additional oscillating motion upon the continuous orbital movement of the auxiliary gripper shaft.

Abstract: A grip shaft is supported on a cylinder that makes an oscillating (reciprocating rotational) motion. The grip shaft is provided with a grip for holding a printing material. The grip is further provided with a cam follower. A cam is positioned along the path of motion of the cam follower, and the cam follower engages with an opening portion of the cam when the grip is right before a printing material feeder portion, and opens the grip. Further, when the grip reaches the printing material feeder portion, the cam follower moves to a closing portion of the cam, closing the grip to hold a printing material. After the grip has held a printing material, the cam follower disengages from the cam as the cylinder is rotated in the opposite direction. The opening portion and the closing portion composes a continuous cam surface.

Abstract: Grippers or gripper elements are attached at conveyor chain links of a revolvingly driven conveyor chain. The leading edges of each product of an imbricated product formation, in which each product bears upon the next following or trailing product, comes to lie on a clamping jaw of an associated gripper or gripper element and is engaged from above by a clamping element, such as a clamping finger of such gripper or gripper element. The product conveying direction of the transport apparatus and the product conveying direction of an infeed device delivering the products are in the same direction at a product take-over region of the transport apparatus. During the closing motion of the clamping finger of the gripper or gripper element this clamping finger raises a region or portion of the preceding or leading product which covers the leading edge of the trailing product which is to be engaged by such gripper or gripper element.

Abstract: A sheet clamping system for high speed rotatable drums is provided in which light-weight clamping bars, formed of relatively thin metal sheet stock, are configured and/or oriented for maximum resistance to deflection radially of the axis of drum rotation as well as positively secured in a sheet medium clamping position at axially spaced intervals along the length of the drum. The system further includes centrifugally actuated, axially extending rods positioned to underlie the operative portion of each clamping bar in a manner such that leading and trailing edges of a retained sheet are sandwiched between the rods and the clamping bars under a clamping force generally proportional to the square of drum rotational speeds.

Abstract: A sheet clamping system for rotatable drums especially suited for use in retaining and positioning successive receiver sheets for high speed printers. The clamping system enables unidirectional movement of a sheet during delivery of the sheet to the drum from a supply stack, during clamping of the leading edge of the sheet to the drum followed by clamping of the trailing edge of the same sheet to the drum and during subsequent release and delivery of the sheet to a receiving stack or tray. The system features a cam system for actuating respective leading and trailing edge clamps which is supported on the same shaft to which drum driving rotation is supplied by a drive motor. In one embodiment where the drive motor is reversible, a one-way clutch connection of the drum to the shaft enables drum rotation during one rotational direction of the shaft whereas clamping bar actuation is effected by rotation of the shaft in the opposite direction while holding the drum.

Abstract: A sheet turn-over assembly includes at least one cooperating pair of first and second sheet gripper sets. Each set has coacting sheet gripper fingers and sheet gripper abutment surfaces. These fingers and abutment surfaces in each set are carried on coaxially aligned rotatable shafts. Movement of one shaft with respect to the other accomplishes sheet gripping and release. Movement of the coaxial shafts of each gripper set with respect to the cooperating set accomplishes sheet turn-over.

Abstract: An individual conveyor equipped with controlled grippers arranged at a mutual uniform spacing from one another delivers the arriving printed products up to the starting region of a removal conveyor. The removal conveyor is driven at this starting region such as to move substantially in the same sense or direction as the individual conveyor at a product removal region thereof. This removal conveyor is equipped with controlled product removal grippers or gripper elements. The mouth openings of the grippers of the individual conveyor and the mouth openings of the product removal grippers of the removal conveyor are controlled in an opposite sense with respect to one another. To render the design of the removal conveyor less complex and to reduce the noise emission during operation thereof, the product removal grippers are secured at a uniform spacing from one another at a driven endless traction element. Each of the product removal grippers have a movable jaw and a fixed jaw.

Abstract: A clamping gripper for sheet-fed rotary printing presses wherein tensions produced in the paper by adhesion forces of the blanket do not react in run-on shifts of the center of a main gripper member mounted for rotation with a fit clearance on the gripper shaft. A spring is so disposed, and the bearing plane and the gripper support surface are so inclined relative to one another, that the resultant force due to the spring force, thrust and bearing load intersect the gripper finger at the transfer point.

Abstract: A transfer device for transferring a toner image onto a transfer material includes transfer material supporting device having a sheet-like material for supporting the transfer material and a supporting member for supporting the sheet-like material for movement along an endless path, gripper, mounted in an opening in the supporting member for releasably gripping an end of the transfer material, a sheet member mounted on the gripper to cover at least a portion of the gripper.

Abstract: An envelope holder is described for feeding envelopes through a printer. It comprises a pocket formed from an upper and lower sheet joined together, a window portion of which is removed to allow printing of an envelope held in the pocket. The holder is improved in that the upper sheet has longitudinal edges that extend only a fraction of the length of the lower sheet portion that forms the pocket. That fraction is between about 30% and about 85% of the lower sheet length.

Abstract: A conveyor for a sheet-fed rotary printing press for transferring sheets away from an impression cylinder includes a delivery cylinder disposed adjacent the impression cylinder, and a chain conveyor having a plurality of sheet grippers, adapted for moving the grippers about the delivery cylinder for successively engaging sheets on the impression cylinder. The delivery cylinder has a gap in its outer periphery for receiving successive of the sheet grippers during transfer of a sheet from the impression cylinder to the sheet grippers. The sheet grippers each include a support and a pivotable gripper finger, and a displacer mounted on and extending rearwardly of each gripper support for bridging the gap in the delivery cylinder within which the gripper is disposed during a sheet transfer operation, and for maintaining tension in the sheet during transfer from the impression cylinder to the chain conveyor. The displacer is comb shaped having a plurality of rearwardly extending arcute shaped teeth.

Abstract: A conveying apparatus for panels is equipped with two revolving endless conveyor belt members such as chains etc. The chains are connected with each other with successively arranged transverse organs such as cross bars. On each cross bar there are mounted displaceably with braking two panel-engaging devices comprising clamping springs for gripping and transferring panels from a charging to a discharging station past a random number of intermediate processing stations. Two pneumatically operable pusher members push the panel-engaging devices into contact with the lateral edges of an arriving panel and cause the clamping springs to grip the panel. At the discharging station, two separating pusher members of similar construction open the clamping springs and push the panel-engaging devices apart toward their terminal positions at opposite ends of their cross bar, thus setting the panel free to be discharged from the apparatus.

Abstract: An automatic document feeder including an automatic sheet winding device and an exposure device. The automatic sheet winding device includes a rotary drum and a sheet clamping device for clamping the original sheet wound around a circumferential face of the rotary drum such that a sheet clamping region and an exposure region on the circumferential face of the rotary drum are circumferentially spaced from each other.

Abstract: Described is an automatic sheet winding and discharging device which includes of the following: a rotary drum for winding a sheet onto it; a sheet holding device provided on the circumferential surface of the rotary drum to sandwich the tip-end of the wound-up sheet; a sheet holding roller unit provided in the vicinity of the sheet discharger unit for pressing the sheet wound onto the rotary drum surface; and a device for allowing the sheet-holding roller unit to either come into contact with or separate from the surface of the rotary drum in conjunction with the operations for automatically winding and discharging a sheet onto and from the surface of the rotary drum.

Abstract: Successive sheets are drawn from a magazine by a gripper which is movably mounted on a drum-shaped rotary conveyor and serves to transfer successive sheets into a gathering machine. The position of the gripper with reference to the conveyor is indicative of the thickness of the sheet or sheets which are transported from the magazine, and such position is ascertained by a monitoring device in cooperation with an input element which is movable with the gripper. The input element can constitute a soft iron core which extends into a coil of an oscillatory circuit constituting the monitoring device, a plate which extends between the plates of a capacitor forming part of the monitoring device, or an arm for a disc bearing encoded information which is monitored by a photoelectronic transducer. The monitoring device transmits signals to a circuit which is adjacent the path of movement of the gripper and includes the transducer or a winding cooperating with a winding of the oscillatory circuit.

Abstract: A counterbalancing and sheet clamp retention system for high speed sheet handling drums of the type in which leading and trailing edge clamping bars extend along the length of the drum periphery and are capable of movement between retracted and sheet clamping positions for automatic loading and unloading successive sheets to and from the drum. The clamping bars, supported at opposite ends for movement between their respective retracted and clamping positions, are engaged centrally along their length by a retaining device which moves to a clamping bar engaging position under centrifugal force as the rotational velocity of the drum reaches a predetermined value.

Abstract: A sheet clamping apparatus for a thermal printer drum includes a clamping lever mounted in a recess of the drum, fixed cam members, and a mechanism mounted on an end surface of the drum and connected to the clamping lever and operatively associated with the cam members for moving the lever between open sheet receiving and ejecting positions and a closed sheet clamping position as the drum rotates.

Abstract: An apparatus for processing sheet products includes a rotatable drum having a plurality of pockets adapted to receive individual sheet products. Plural rollers are disposed along the periphery of the drum between adjacent pocket openings. The rollers are rotated through a portion of the drum movement and locked against rotation through the remainder of the drum movement. Cam rollers are provided to lift the pockets radially outward, tilt the pockets, and open and close sidewalls of the pockets to facilitate ingress and egress of the sheet products.

Abstract: A sheet gripper for a rotary press is provided having a hooked gripper finger pivotably connected at its lower end to a clamping element, and a roller disposed upon the gripper finger is biased against the guiding surfaces of a finger support element to ensure smooth changes from open and closed gripper finger positions, substantially without any vibrational motion or displacement resulting in the plane of sheet motion. Preferably, a compression spring is mounted in the clamping element to bias the roller against the gripper support element, the element having a rectilinear guide surface disposed substantially perpendicularly to a retaining surface, and a cam surface which extends upwardly and inclined outwardly from the rectilinear guide surface. Upon oscillation of the gripper shaft, the roller is guided along the rectilinear guide surface and cam surface, thereby defining accurate gripper finger motion.

Abstract: Apparatus for rotating a flexible sheet of material includes a rotatable axle and a generally cylindrical drum mounted on the axle for rotation therewith. A generally cylindrical cam is secured to an end surface of the drum for rotation therewith, the cam defining at least one indentation extending towards the axle. A cam follower is provided positioned to generally follow the cam. A clamp normally biased against the surface of the drum for securing a first edge of the sheet material to the drum is provided. A biasing cam is journaled to the end surface of the drum in the cam indentation, the biasing cam responsive to pressure from the cam follower for biasing the clamp away from the drum surface so as to enable the positioning of an edge of the flexible sheet of material between the clamp and the surface of the drum.

Abstract: A sheet feeder for sheet-processing machines having a positively driven, gripping mechanism which travels over at least two deflection wheels including at least one sheet-transporting gripper which is opened or closed during the course of travel through a revolving path. A number of toothed belts can be used; each belt includes a plurality of spaced aparet recesses into which a support body carrying a gripper mechanism is removably inserted. The deflection wheels are provided with circumferential recesses which correspond to an inwardly protruding part of the support body of the gripper mechanism in the form of an actuating lever that is actuated on striking or leaving a cam race, which may be part of the circumferential recesses of the deflection wheels.

Abstract: A feeding device for photosensitive materials arranged between the printing unit and the developing unit of a photographic processor. A photosensitive material supplied from the printing unit is smoothly transported on the surface of a feed drum which intermittently rotates, synchronized with the speed of development at the developing unit. While the web is being fed, its leading and tail ends are pressed by presser bars against the drum surface. Also provided is a loop formation plate adapted to tilt gradually downwardly under the increasing weight of the photosensitive material lying thereon to allow it to slide down smoothly. Thus, the web is formed into a loop while hanging. The material is fed straight without meandering owing to an anti-meandering mechanism including a pair of restrictor frames for restricting the material from moving sideways and a roller for pushing the material into between the restrictor frames when it is in its operative position.

Abstract: An inverter apparatus for strips of sheet material which are affected by a magnetic field. The apparatus includes a pair of parallel drums which rotate in opposite directions immediately adjacent each other. Mounted within the drums in prescribed and fixed relationship are permanent magnets. A strip adheres to the first drum under the effects of the magnets within and rotates with that drum until it comes between the two drums. At that point the strip enters the field of the magnets in the second drum and departs the field of those in the first whereby it adheres to the second drum. The strip rotates with the second drum until it departs the field of the magnets therein, whereupon the strip drops off the drum in inverted relationship.

Abstract: A suction system is arranged in a sheet guiding cylinder of a printing machine which is switchable from the first form mode to the printing on both sides of the sheet which is turned over by the suction system around its rear edge. The suction system includes an arrangement for automatically controlling suction air for operating a suction head which is movable in a sucker body of the suction system.

Abstract: A process is described in which an oscillating gripper unit is utilized, having a gripper foot for the oscillating gripper member carried angularly fixed by the respective control shaft; during the return stroke of the gripper unit from the rotating cylinder of the printing machine towards the table carrying the sheets, the gripper foot is turned eccentrically with respect to the axis of its control shaft making this latter turn with appropriate means in a directional sense in concordance with that of the rotation of the whole unit in such a way as to produce a raising of it with respect to the gripper member such as to carry it out of the path of this latter while the axis of oscillation of the unit is maintained stationery with respect to that of the cylinder.

Abstract: This invention concerns a sheet gripper for sheet processing machines, especially for single- and multi-color printing presses of random printing processes as well as for numbering machines, coaters, folders, and similar apparatus. To permit interchange of one of several sheet grippers for another without removing the gripper spindle from the machine, the sheet gripper is formed with an open portion which encloses the gripper spindle through a maximum arc of 180.degree. and is fixedly retained in radially centered relation against the gripper spindle by a gripper lifter or carrier, also referred to as a drive dog, which is fixedly secured to the gripper spindle as by means of a screw or other removable fastener which extends through the drive dog or carrier and into the gripper spindle.

Abstract: Method and apparatus for loading an unexposed film on a rotary drum in a exposure/recording apparatus, such as raster plotter or a color scanner, and unloading the exposed film out of the drum, the replacement of films being automatically carried out by the use of a supply pallet and a discharge pallet, suckers, and maneuverable linkages so as to enable the film to travel from the supply pallet to the drum, and, after exposure, to the discharge pallet.

Abstract: A printed sheet removal assembly selectively disengages sheets from the grippers of a sheet transport by actuation of a pivotable switch lever that moves an axially slidable rotating switch shaft. A two step switch cylinder is carried by the switch shaft and has adjacent rolling surfaces. One of these rolling surfaces is cam shaped and causes a control roller to move a gripper opening segment into the path of a sheet gripper. The switch cylinder is spring loaded and returns to its switched off position once the switch lever has been released.

Abstract: The disclosed apparatus has a data reading head and an elastomer ring on a driven rotor within stationary arcuate outer guide means for driving a sheet along a path starting and ending at a common location and passing the reading head. The elastomer ring and the outer guide are shaped so that their cooperation biases sheets against and into edgewise alignment with side guide means along portions of the path approaching the reading head and departing from the reading head. The sheet feeding path is arched away from the elastomer ring in the region of the elastomer ring, and the guide means has a light-absorbing channel that is uninterrupted by the elastomer ring disposed opposite the data reading head. The entire apparatus is readily opened up for service virtually without resort to tools and restored to operative condition without need for adjustments.

Abstract: To prevent impact shock of copy elements formed as a single sheet or package of sheets, against grippers of a gripper cylinder which operates at a slower speed than the arrival speed of the copy elements, the grippers of the gripper cylinder engage the leading edges of the arriving copy elements, deflect the leading edges below the plans of arrival and carry the leading edges about the circumference of the gripper cylinder to thereby convert kinetic energy inherent in the copy elements into energy required to cause bending stresses in the copy elements as they are bent about the gripper cylinder, the copy elements, upon rotation of the gripper cylinder, being turned or flipped over, with the trailing edge being guided by sheet-metal guide elements or the like; the sheets are delivered to a delivery apparatus operating at a slower speed than the incoming speed, for example in imbricated or shingled form upon opening of the grippers and delivering the copy elements to the delivery transport belt system upon ali

Abstract: A device for safeguarding a rotary printing machine for printing sheets in a first form and perfector printing operation having a storage and a turning drum, first adjusting elements for adjusting a trailing drum body of the storage drum to different format sizes, second adjusting elements for adjusting the turning drum, and grippers and mechanical and electrical means for safeguarding the printing machine during a system-determined function setting includes a first coupling wheel assigned to the trailing drum body of the storage drum, a second coupling wheel mounted on a shaft journal of the turning drum, both of the coupling wheels being linked free of slippage via drive means in such a way that the second coupling wheel and the turning drum run in synchronism, the second coupling wheel being braced axially via trip cams on a disk secured to the shaft journal so that, in a case of rotation between the second coupling wheel and the turning drum due to a fault, a switching pulse is issued which releases a sig

Abstract: The collating apparatus comprises a plurality of collating or collecting conveyors or product advancing means revolvingly driven about the axis of revolution of the collating apparatus. These collating conveyors are pivotably mounted at each end face of the collating apparatus in control levers or rocker arms. These rocker arms are pivotably mounted on two disc-shaped supporting or support elements. These support elements are mounted in mutual axial separation on a shaft of the collating apparatus rotatably driven about the axis of revolution. The control levers or rocker arms support control rollers or followers which travel in guide grooves of guide or control curves or cams. The control curves or cams are constructed such that the rocker arms together with the collating conveyors are pivoted inwardly and subsequently are again pivoted outwardly relative to the axis of revolution of the collating apparatus during its revolution.

Abstract: Disclosed is an apparatus for wrapping paper on a cylindrical drum for use in a recording or reading system. The apparatus includes a roller for pressing the paper wrapped on the cylindrical drum. The roller is disposed in the vicinity of the cylindrical drum and in parallel to the axis of the cylindrical drum and is supported by a pair of roller-supporting plates disposed facing each other. Also included is a connecting rod disposed in parallel to the roller. The connecting rod penetrates a through-hole made in a substantial center portion of each of the roller-supporting plates and is supported by a pair of rod-supporting plates disposed outwardly with respect to the pair of roller-supporting plates. A lever is mounted on an end of at least one of the roller-supporting plates, which end is opposite to the other end where the roller is supported, so that the roller is rotatable about the axis of the connecting rod with the operation of the lever.

Abstract: A sheet winding apparatus with a detection mechanism for detecting incorrect winding of a sheet and stopping the movement of the apparatus. The detection mechanism includes an actuator member movably provided on a front cover of the apparatus so as to detect incorrect winding of a sheet as well as to detect opening of the front cover.

Abstract: A resilient sheet gripper for a sheet-fed rotary printing press having a gripper shaft and a gripper finger disposed in a recess of a cylinder of the printing press and including an asymmetrical four-pivot mechanism having the gripper finger as one of its links for governing the motion of the gripper finger and ensuring perpendicular closing of the tip thereof with respect to a sheet engaged on a gripper support at the edge of the recess.

Abstract: A sheet presenting assembly, for example for dispensing banknotes, comprises a rotatably mounted set of stacking wheels (2-5) each having a plurality of sheet receiving slots (7). A stripping device (13) cooperates with the stacking wheels (2-5) in a first position to strip sheets from the stacking wheels to form stack of sheets. The stripping device (13) is movable to a second position in which the stack of sheets (28) is clamped between the stripping device (13) and outer surfaces of two belts (20, 20'). Drive including a drive motor (22) and the belts (20, 20') move the stripping device 13 with the stack of sheets (28) clamped therebetween towards a present station (29).

Abstract: A printing device is provided with a paper insertion mechanism including a paper stop and a pair of paper driving rolls operable in association with the rotation of a printing cylinder which includes an actuating cam. A paper presser operates synchronously with printing operation to press the paper against a paper guide during printing to impart tension to the paper to prevent transverse movement thereof.

Abstract: An automatic sheet-like winding and outputting apparatus with a drum for mounting a sheet-like member, a first claw for catching the front edge of the sheet-like member, a second claw for gripping the sheet-like member in cooperation with the first claw, and a cam member for driving the first and second claws in accordance with the rotation of the drum. The second claw is also operated to separate the front edge of the sheet-like member from the drum. A sheet pressure member is further provided for pressing the sheet-like member toward the surface of the drum thereby pressing the sheet-like member in close contact with that surface.

Abstract: An infrared dryer is provided for a printing press which uses a series of carriers, each comprising one or more gripper bars, on a conveyor to respectively carry printed sheets past the dryer. The sensor produces different binary signals in response to the presence or absence of material, viz, a gripper bar structure or carried sheets in the path, each carrier producing a predetermined number of transitions between the presence and absence signals, the only change between an empty carrier and one carrying a sheet being the duration of the presence and absence signals. A microprocessor is programmed to cyclically count from zero to the predetermined number of transitions, with each count cycle representing the passage of a carrier. The microprocessor also measures and compares the total durations of the presence and absence signals during each count cycle. If the presence signal duration exceeds the absence signal duration, then the heater is actuated to a preselected operating intensity.

Abstract: An improved sheet gripper system disposed on the impression cylinder of a printing press having regular sheet grippers mounted on a gripper shaft on the impression cylinder with additional grippers provided in the spaces between the regular grippers, which spaces are intended for cooperating transfer grippers, the additional grippers being adapted to retract into a gripper channel and extend out into the gripper plane only in one zone of the movement of the impression cylinder in which the between-gripper spaces are freed of the cooperating transfer grippers so that the front edge of a sheet is held by both the regular grippers, as it passes through the printing zone, and the additional grippers and the tension to which the printing material is subjected is greatly reduced, and the registry and print quality are improved.

Abstract: A device for moving offset plates from a stack of such plates to a fixing device by grasping a plurality of offset plates having positioning engagement holes from a stack and moving them through a print-through device to a fixing device utilizing a transport mechanism having positioning pins to receive the engagement holes of the offset plates and to release them when the offset plates have completed the desired movement.

Abstract: A chain conveyor for the delivery device of printing presses has gripper systems (1) being carrier directly by the endless conveying chains (2). The gripper system (1) is embodied by a unitary aluminum basic member (6). A steel tube (9) is cast into the basic member (6) at its center of gravity and over its whole length and optimizes the flexural and torsional rigidity of the gripper system (1).

Abstract: Collation of folded printed signatures or sheets is accomplished by a rotating collating cylinder or rotary collator which is rotatably driven about its longitudinal axis of revolution. The rotary collator comprises a plurality of collating conveyors arranged substantially parallel to this longitudinal axis. These collating conveyors are substantially annularly positioned about this longitudinal axis and extend substantially parallel to the longitudinal axis of the rotary collator. The folded printed signatures or sheets are fed or conveyed by three feeding conveyors or infeed devices and are deposited to straddle the collating conveyors or the respective folded printed signatures or sheets already straddling the collating conveyors. The folded printed signatures or sheets are displaced in the direction of conveyance of the rotary collator while revolving about the longitudinal axis of the rotary collator.

Abstract: Sheet-guiding drum for sheet-fed rotary printing machines, having a drum body carrying at least two gripper bridges adjustable to different paper thicknesses, includes gripper supports carried by the drum, the gripper supports being adjustable in at least substantially radial direction of the drum; play-free adjusting elements carried by the drum body and adjustable independently of one another for adjusting the gripper supports; and a central adjusting device mounted readily accessibly on the drum body for actuating the adjusting elements in common.

Abstract: A clip 12 is engaged with the leading end portion of a photosensitive material 10 of continuous length which has been printed with images. The clip is propelled by a driving force to convey the photosensitive material. In a clip removing device 56, rotating arms 66 bend the leading end portion of the photosensitive material in the direction of the thickness thereof such that the leading end portion is disengaged from the clip. The photosensitive material is then fed by rollers 72, 74, 80, 82 to a subsequent stage 87 where it is cut off.

Abstract: A sheet is disposed around the outer peripheral surface of a drum. The drum is provided with sheet suction holes for attracting the sheet against the drum surface. The sheet suction holes extend through the drum from the interior to the exterior thereof, and are disposed in a plurality of circumferentially spaced rows. Each of the rows includes a plurality of sheet suction holes and is connected to suction means, which is operable to withdraw air outside the drum into the interior thereof through the row of suction holes. At least the leading edge of the sheet is retained by a sheet seizing claw which is movable toward or away from the drum surface. The claw is urged into abutment against the drum surface under the influence of a centrifugal force as the drum rotates.

Abstract: A sheet winding and discharging device which includes a drum rotatably mounted in the device for winding a sheet therearound, sheet feeding members for feeding the sheet to the drum, a pair of sheet detecting sensors for detecting the length of the sheet to be fed, a pair of claw members mounted on the drum for holding the sheet which is fed to the drum and control members for controlling the movement of the claw members, the control members having a function for discharging the sheet without winding it around the drum in case that the sheet has a length more than the predetermined length.

Abstract: The folded items (9) arriving from a folding apparatus (1) are grasped on the leading folded spine (10) by forward grippers (12) on an opening cylinder (8). Then the overhang (11) of each item is grasped by rearward grippers (13). Because of centrifugal force and optionally by means of an electrostatic charging device (7), the lower part of the folded item (9), after being released from the conveyor belts (5, 6), is repelled. As a result, rods (14) secured on a chain system (15) can be introduced, during their upward movement that is at a tangent to the opening cylinder (8), it between the two halves of one printed item, after which the transporting of the folded items (9) to further chain systems (such as 17) can be effected. Subsequently, folded items (9) can be collected one on top of the other and/or accelerated or delayed in accordance with how the transfer location is embodied.

Abstract: A board for feeding a single sheet of paper including holes for paper-feeding which are to be engaged by the sprocket for a paper-feeder of a printer formed at specified intervals on both sides thereof and a part for gripping the rear end of the single sheet of paper and a part for gripping the front end of the single sheet of paper respectively formed on the surface of the board at a specified distance between them in the paper-feeding direction.