Abstract: A registration system for aligning a printing screen frame with an image platform includes a plurality of arms, rotatably secured to a lower surface of the image platform. The rotatable arms have retractable registration elements mounted on the outer ends thereof, and have inner ends which are mounted so as to be translated outwardly from and towards the lower surface of the image platform upon rotation of the arms, between retracted and registration positions. In the registration position, the registration elements are aligned with and cooperate with the printing screen frame to accurately align the printing screen frame over the image platform.

Abstract: A tensioning frame (1) for stencils (9) formed of metal foils or plastic films, especially for stencil printing, provided at their margins (8) with perforations (10) for tensioning. The frame includes a tensioning device operated by a pressure medium for driving tensioning bars (5) that carry hooking pins (6) that engage the perforations of the stencil. The tensioning device is formed by an elastically deformable tensioning tube (4) disposed in a frame profile (2) and uniformly supplied with a pressure medium. The tensioning bars lie with the full length of their front sides in contact with the tensioning tube and with their back sides resting against fulcrum nubs (17) which in turn are supported against an extrusion (3) which closes the frame profile. The tensioning bars can be pivoted by inflating and expanding the tensioning tubes to stretch the stencil over a bridge (16) on the frame.

Abstract: Can-holding device for holding filled beverage cans for printing on their surfaces, consisting of a frame (1) and two jaws (2) displaceable in the axial direction of the beverage can (D)to be held between a closed position (FIG. 2) and an open position (FIG. 1) for gripping the beverage can (D) to be printed at its two ends, with jaws (2) each being pretensioned by a spring (3) into its closed position and with grippers (21, 22) which permit gripping by external opening elements (Z) for optional movement of the jaws into their open position, and with each jaw (2)consisting of a jaw carrier (23) that cooperates with guide (11) on frame (1) and is provided with a gripper (21, 22), and of a jaw body (24) rotatable relative thereto, said body being lockable in a reference rotational position (FIG.

Abstract: An improved ribbon cassette is provided for a receipt printer of the impact printing type. The ribbon cassette has two raised areas disposed on the distal ends of the ribbon presenting arms, about the print area defining the ribbon window. These raised areas act as pressure bumps or spring-like retaining pads that bias the paper against the platen. In accomplishing the bias, a paper bubble commonly formed in the ribbon window area is substantially reduced or eliminated. This has the effect of reducing the noise generated by the impact wires of the print head striking the paper.

Abstract: The present invention relates to a key structure of a keyboard for easy grease injection. The key structure comprises a top cover installed with a supporting structure, a key cap, and a link bar. The supporting structure comprises two hooks at two sides. Each hook comprises a plate structure on its top portion and a horizontal sliding slot below the plate structure. The key cap comprises two clamps installed on a bottom side of the key cap. The link bar comprises two upper ends installed in the two clamps, and two lower ends installed in the horizontal sliding slots. Each of the plate structures comprises an injection hole. The injection hole is positioned so that grease can be injected into the horizontal sliding slot below the plate structure through the injection hole so as to reduce the friction between one lower end of the link bar and the horizontal sliding slot of the hook when the lower end of the link bar slides in the horizontal sliding slot.

Abstract: An inking roller has a pair of journals coaxially coupled to its opposite ends, the journals being supported by frame means for both rotation and axial reciprocation with the roller. The journals are detachable from the roller by being moved axially away therefrom, as when the roller becomes worn or flawed and needs replacement. A pair of guide rails are removably mounted to the frame means so as to extend in parallel spaced relationship to each other. On being freed from the journals, the roller rests on the guide rails for rolling thereon between a mount/dismount position, where the roller is mounted to and dismounted from the frame means via the journals, and a load/unload position where the roller is loaded into and unloaded from the press. A drive lever coupled to one of the journals to impart linear reciprocation to the roller is deprived of its fulcrum to permit that journal to travel axially away from the roller for disconnection.

Abstract: A seal for a chamber doctor blade (12) of a printing machine, with a sealing block (30) of a pliable material, which is inserted at one end of the chamber doctor blade between two doctor blades (16, 18) and closes off an inking chamber (20), bounded by the periphery of an applicator roller (10) of the printing machine, the doctor blades and a housing (14) of the chamber doctor blade, in which the surface of the sealing block (30), facing the applicator roller (10), is covered with a strip (34) of elastic material, which is harder than the material of the sealing block.

Abstract: An improvement is provided for an embossing machine of the type having a rotating dual die character wheel assembly. The die character wheels are mounted independently from their outer surfaces within the embossing machine so that a completely unobstructed region exists between the character wheels. This allows a workpiece to be marked to pass unimpeded through the region so that the entire workpiece is capable of being marked. Pinion gears are provided at the outer periphery of the character wheels which engage ring gears mounted on the character wheels whereby the character wheels are rotated simultaneously.

Abstract: A keyboard shield and copy holder is presented. The keyboard shield and copy holder has a top plate member having downward extending left and right side panels and a bottom plate member having upward extending left and right side panels. Each upward extending left and right side panel of the bottom plate member is adjustably engaged with each respective downward extending left and right side panel of the top plate member.

Abstract: A safety harness comprises a strap portion for extending over a portion of a person's body to retain the person within the safety harness. The strap portion is fabricated from a flexible material having an elastic extension in the range of approximately 3 to approximately 15% under a tensile load of approximately 10 pounds. The material of the strap portion also has a ultimate tensile load of at least approximately 5,000 lbs.

Abstract: A key structure of computer keyboard includes a base, a conductive film, an elastic member, a frame, and a cap. A plurality of coupling parts including sliding grooves are arranged on the cap and the base. The frame has a plurality of pivoting shafts arranged within the sliding grooves such that the frame can be pressed down. The top and bottom ends of the elastic member are fixed between the cap and the conductive film such that the elastic member will not leap out when the key structure is disassembled. A clamping device is arranged between the cap and the base such that the key will not shake when pressed.

Abstract: A wire connecting structure of a connector comprises a connector housing, a terminal holding portion protruding from an end of the connector housing, terminal incorporating holes which are provided in the terminal holding portion and communicate with the connector housing, terminals disposed within the terminal incorporating holes, covered wires placed on the terminals, and upper hole wall portions which are provided in the terminal holding portion to define upper portions of the terminal incorporating holes and when pressed, subside into the terminal incorporating holes so as to contact the covered wires, core elements of the covered wire and the terminal being subjected to ultrasonic vibration through the upper hole wall portion which is pressed so as to contact the covered wire, so that the core elements and the terminal are conductively contacted with each other, the upper hole wall portion being settled by fusion in each of the terminal incorporating holes by the ultrasonic vibration.

Abstract: An offset printing machine having a plate cylinder which carries a printing form and which is operatively connected to an inking unit and a dampening unit is provided. The dampening unit includes a dampening applicator roller which is mounted in contacting relation with the dampening applicator roller. The dampening applicator roller also includes at least one auxiliary roller which is mounted in contacting relation with the dampening applicator roller downstream or after the contact point between the dampening applicator roller and the plate cylinder. The auxiliary roller has a surface with a coating of non-stick material which blocks the transfer of ink and dampening medium to the surface of the auxiliary roller and is axially movable relative to the dampening applicator roller and selectively rotatable at circumferential speeds substantially equal to or different from the circumferential speed of the dampening applicator roller.

Abstract: A light radiating device of a heatsensitive perforating device includes a casing having an opened lower surface arranged at a perforating plane of a heatsensitive stencil sheet; a light emitting device arranged within the casing, the light emitting means having a bulb portion, a base portion and a contact; an electrode connected to a power supply for energizing the light emitting device, said electrode contacting with the contact of the light emitting device; lower side reflection mirrors contacting with the perforating plane of the heatsensitive stencil sheet; upper side reflection mirrors continuous with the lower side reflection mirrors in a predetermined angle; an upper reflection mirror arranged continuous with the upper side reflection mirrors and in parallel with the perforating plane of the heatsensitive stencil sheet; a holding device for holding the light emitting device in such a manner that a line passing straight through the contact, the center of the base portion and the center of the lower surf

Abstract: A lowered profile electrical connector assembly is composed of a socket and a detachable plug. A flat dielectric socket base mounts a plurality of arrayed first terminals each having a first spring contact. A dielectric plug base mounts a plurality of arrayed second terminals each having a second spring contact. Each first terminal includes a first lead which extends outwardly from a bottom of the socket base for electrical connection with an external circuit. The first and second terminals are each provided with first and second leads for electrical connection with external circuits. Each first terminal is shaped to have a S-shaped section composed of inverted and upright U-shaped portions which are continuous with one leg of the upright U-shaped portion shared by the inverted U-shaped portion. The upright U-shaped portion includes a free spring leg which defines the first spring contact having a free contact end for engagement with the second spring contact.

Abstract: A keyboard cover of the present invention includes a cover holder removably mounted to one side of a keyboard. A flat plate is mounted on the cover holder and selectively rotatable toward the top of the keyboard for covering it or toward the bottom of the keyboard for covering it. A connecting device is rotatably connected to the cover holder at one end and rotatably connected to the plate at the other end for connecting the cover holder and plate. With this configuration, the keyboard cover is capable of selectively playing the role of a cover, a keyboard angle adjusting device or, when the keyboard is not used, a bookrest or a mouse table, as desired.

Abstract: A stenciling device for applying a multi-color design on a cylindrical object includes a registration assembly for synchronizing the rotational speed of the object to be stenciled with a silk screen assembly. The registration assembly includes a cable assembly that is interconnected between the silk screen assembly and a rotation member that is adjustable to increase or decrease the size of its circumference so that it conforms to the size of the object to be stenciled.

Abstract: In a device for inking a pitted cylinder, and for ensuring a regular inking, a pressing roller is placed within a seal tight chamber formed between doctor blades provided for laminating ink within the seal tight chamber.

Abstract: An improved stencil set and method of applying stenciled designs to a surface is provided. A plurality of stencil sheets are provided wherein each stencil sheet has a distinct portion of the design represented by cutout areas in the sheet and remaining portions of the design visibly printed on the sheet. The sheets are used in sequence to apply the design to a surface and, in the preferred embodiment, with each sheet, the portions of the design not being immediately applied to the surface are visible to the user on the stencil sheet itself.

Abstract: A method for coating a printing machine cylinder, especially a rubber blanket cylinder of a web- or sheet-fed rotary offset printing machine, includes applying to a cylinder body a first layer containing at least one zinc-bearing substance selected from the group consisting of ZnFe, ZnCo, ZnNi and Zn.