Abstract: A cylinder for a rotary printing press is provided with a thin slit into which leading and trailing ends of a plate to be secured to the cylinder are inserted. The slit has two legs that meet at a central apex and define a generally arrow-shaped slit. A plurality of these slits can extend across the cylinder in a zig-zag shape.

Abstract: A compression tool embossing die having a frame and a movable embossing pad. The frame has a U-shaped member and two side plates attached to opposite ends of the U-shaped member. The side plates have slots therein. The embossing pad has an embossing pad member, a dowel and a backstop. The dowel has its ends movably located in the slots of the side plates. The pad member has two wedge shaped slots in its bottom surface. The die further comprises two springs located in the wedge shaped slots and biasing the embossing pad at a first position on the frame.

Abstract: A printing system for transferring ink from an inked ribbon supplied from a ribbon roll having a tubular core with an inner surface onto a substrate. The system includes a rotatable locking cam hub having a reel hub with a first surface engageable with the inner surface of the ribbon roll, and an eccentric hub having a second surface engageable with the inner surface of the ribbon roll. The eccentric hub is rotatable relative to the reel hub to provide a variable diameter between the first surface of the reel hub and the second surface of the eccentric hub. The diameter of the locking cam hub may be reduced by rotating the eccentric hub relative to the reel hub to permit disposal of the ribbon roll tubular core about locking cam hub, and the diameter of the locking cam hub may be increased by rotating the eccentric hub relative to the reel hub to engageably retain the inner surface of the ribbon roll by the first surface of the reel hub and the second surface of the eccentric hub.

Abstract: A device for securing printing forms on the circumference of a printing form cylinder, wherein a leading edge and a trailing edge of a printing form are receivable in a gap formed in the printing form cylinder and, in a clamped or locked-up state of the printing form, engage respective side faces defining the gap, including a rotatable cross-bar received in the gap, and a clamping element for acting upon one of the edges of the printing form, the clamping element being secured to the cross-bar, further includes a protrusion formed on a side wall having one of the faces defining the gap of the printing form cylinder, the clamping element being cooperable with the protrusion for clamping a printing form edge in a tangential direction to the printing form cylinder during a clamping or locking process.

Abstract: A printing machine includes, like a gold blocking press, a printing plate mobile relative to an object support to apply to an object to be printed a foil appropriate to the required printing. The printing plate is curved when in contact with a support block mounted so that it can rock on an applicator head mobile transversely to the object support. Applications of the printing machine include printing on flat objects.

Abstract: Plate cylinder of sheet-fed printing press is disclosed whose circumference is covered by minute glass beads 14 of approximately uniform diameters in order to decrease a friction force between a plate as well as to prevent the generation of static electricity.

Abstract: Sheet delivery in a printing press, wherein, at acceptance of a sheet, a gripper bar of the delivery has a speed which is increased in comparison with a sheet-surrendering or transferring gripper bar includes delivery chains, and a drive for driving the chains so as to increase the speed of the gripper bar of the delivery at an instant at which a sheet is transferred to the gripper bar of the delivery by the sheet-surrendering gripper bar.

Abstract: A paper feed device that uses a separating pawl for preventing overlapped feeding of sheets of recording paper wherein the separating pawl does not resist the feed of paper, thereby ensuring smooth paper feed. In the paper feed device, a sheet of paper is fed from a hopper and moved along a separating tilt plane to be separated from the stacked paper by the separating pawl which is pressed toward the paper path by a spring. Each separate sheet of paper is fed between a paper guide plane and an arm section to a print head by a feed roller and a follower roller. When a paper supply roller is in a stopped state, the sheet of recording paper is pulled by the feed roller to be straightened between a collar member and the paper guide plane such that the sheet of paper is away from the separating pawl and therefore is not affected by the resistance of the separating pawl, ensuring a smooth feed.

Abstract: An ergonomic computer keyboard including a front edge section, a character control section, an edit control section, and a number control section, wherein the character control section includes a left character control section and a right character control section, the left character control section and the right character control section having a respective hollow, rounded shape; the edit control section and the number control section are arranged between the left character control section and the right character control section.

Abstract: A conveyance apparatus for an ink-jet printer for ejecting sheets of recording paper from the ink-jet printer regardless of whether the cover to the printer is closed or open. The ink-jet printing apparatus has a cartridge including a print head for forming an image on the recording paper. After passing the print head, the sheets of recording paper pass through the conveyance mechanism used to eject the sheets of recording paper. The ejecting occurs by pressing a spring loaded star-wheel against an eject roller. However, when the cover is opened, the star wheel becomes disengaged with the eject roller, causing the paper to jam instead of being ejected. To correct this problem, the star wheel engages a second eject roller when the cover is opened, allowing the paper to be ejected instead of jammed when the cover is opened.

Abstract: A printing machine comprises a frame, a turntable or other object circulating device on the frame for carrying an object support to a print head. The object support includes a plate with a plurality of suction ports opening onto a receiving surface of the plate. A suction source is connected to the suction ports by a conduit. Elastically deformable bellows is connected to the pipe. The bellows has a closed free end. A displacement detector is responsive to the position of the free end of the bellows for detecting the presence of an object on the plate.

Abstract: A rotating printing machine comprises several printing stations with each station having a printing form cylinder being driven directly by an asynchronous vectorial electric motor controlled by an electronic circuit for monitoring and control of the angular position at a command value that changes over time and is received from a electronic calculating station for the synchronization of the stations with one another. Each of the printing cylinders has an axle connected to the axle of the rotor of the adjacent motor and the axle of the cylinder and motor can be moved in an axial translation for the correction of lateral registration of the printing forms of the cylinder.

Abstract: When the head driving voltage V is of the first level V1 and when the detected temperature exceeds the second threshold T2, the driving pulse voltage V is switched to the second level V2. Afterward, the driving pulse voltage V will be maintained at the second level V2 even though the ambient temperature slightly changes. When the temperature becomes lower than the threshold T1, the driving pulse voltage V is switched into the first level V1. The driving pulse voltage V will be maintained at the first level V1 even though the ambient temperature slightly changes.

Abstract: An ink roller device which permits easy and smooth removal and installation of an ink roller without soiling hands and which also ensures a prolonged service life of the ink roller, and a numbering machine which is equipped with the ink roller device. The numbering machine is equipped with a numbering main body comprised of a frame, a character wheel unit which is incorporated in the main body so that it is allowed to move up and down between a printing position and a home position thereof, an operating means equipped with an operating knob which enables the character wheel unit to be depressed against the spring force of a resetting spring, a swinging arm mechanism which is provided on the numbering main body and which can be swung as the operating knob is depressed, and a cassette-type ink roller device which is detachably held at the bottom of the swinging arm mechanism.

Abstract: A reusable mandrel for use in a plate cylinder of a printing press. The reusable mandrel includes two semi-cylindrical shells spaced slightly apart to form a tube having two opposing longitudinal slots. Disposed inside the tube is a controller that may be activated in order to selectively adjust the diameter of the tube. The tube is preferably set at an initial diameter so that the tube may incrementally accept plate material from a supply mandrel. Thereafter, the controller may be activated in order to decrease the diameter of the tube so that the tube may be removed from a spool of used plate material.

Abstract: An embossing roll for embossing pile fabric having foreground portions that are either mill engraved or acid etched, and background portions formed with a router engraved technique. The foreground portions of the embossing roll have a depth in the order of 1.5/2.0 to 100 times that of the background portions.

Abstract: A stamp has a stencil paper at a central portion of which a stamp pattern is formed including an ink permeable portion and an ink impermeable portion. A frame member holds an outer peripheral portion of the stencil paper, and an ink impregnated body is arranged with the frame member in contact with the central portion of the perforated stencil paper. The frame member and ink impregnated body are secured to a supporting member. A groove is formed in the supporting member between the frame member and the ink impregnated body. The stamp assembly is capable of stamping with no leakage of ink outside the device and with no peeling off of the stencil paper.

Abstract: A process and apparatus for automatically changing the stack of sheets in a sheet-fed printing machine is disclosed comprising sheet-carrying surfaces, sheet-separating devices, a pallet, sensors and a control system. The sheet-carrying surfaces act in concert with the sheet-separating devices to create an auxiliary stack separate from the existing stack of printed sheets. In this manner, the existing stack of sheets are removed and the auxiliary stack is deposited on a new stack base as brief and as closely coordinated as possible. The timing of the transition from the sheet-separating devices to the sheet-carrying surfaces is coordinated such that, even in the case of thin printing materials, the stack changing apparatus functions properly during the stack-changing process.

Abstract: A thermal printer includes a sprocket wheel (11) for forwarding sheets, a platen roller (9), a thermal head (26) pressed on the platen roller (9), and a reduction gear (8) by which a rotating drive of a motor is reduced and is communicated to the sprocket wheel (11) and the platen roller (9). The sprocket wheel (11) is engaged with perforations (33) of a transfer sheet (4), and the transfer sheet (4) and an ink ribbon (21) are forwarded while being tightly sandwiched between the platen roller (9) and the thermal head (26), and the ink of the ink ribbon (21) is thermally transferred onto the transfer sheet (4) by the thermal head (26). In the thermal printer, a gear (10) with a friction clutch is disposed between the platen roller (9) and the reduction gear (8), and the peripheral speed of the platen roller (9) is set to be higher than that of the sprocket wheel (11).

Abstract: A releasable connection assembly couples fluid supply lines in a printing machine with the use of first and second coupling parts. The first coupling part is part of a subassembly fastened to the printing machine frame and adapted for pivotal movement about the frame. The second coupling part is arranged on a movable assembly, such as a washing unit.