Abstract:
A material level detecting mechanism of three-dimensional system includes a bracket, a printing head, first piston, a second piston, a first detecting unit and a second detecting unit. The bracket includes an aligner holder and a supporter. The printing head detachably located in the aligner holder, and including a nozzle with an outlet for extruding the modeling material. The first piston includes a piston rod attached to a piston head, and the second piston slidably located inside the cartridge is adapted to be pushed by the first piston toward the direction of the outlet. The first detecting unit is adapted to detect the home position of the first piston and the second detecting unit is adapted to detect the touching of the first piston and the second piston which provide the initial amount of material present in the cartridge which is subject to print.
Abstract:
Electrode-driver circuits for use with non-contact spark-discharge imaging systems. The circuits rapidly produce short-duration, high-voltage pulses that cause the discharge of a spark to the surface of a printing plate; they feature short rise times, rapid operation and clean decays, thereby facilitating high-speed spark-discharge imaging.
Abstract:
Disclosed is a system and method for reducing the level of electromagnetic emission radiated by electrical discharge type printers. Such printers utilize one or more styluses which are scanned across the width of a roll of electrosensitive paper and are selectively energized to vaporize small areas on the paper's coating to thereby form characters. When the coating vaporizes, a spark is produced which generates a broad band of electromagnetic energy which is conducted into the environment due to the conductive coating of the previously printed paper acting as an antenna.In order to reduce the effective antenna length and/or propagation capability to thereby reduce the energy radiated, the present system creates isolation bands at preset intervals as the printing occurs. The isolation bands are produced by continuously energizing all styluses as they scan across the full width of the paper, thereby causing an entire band of the paper's conductive coating to be burned off across the entire width of the paper. Each isolation band severs the conductive surface of the paper, thereby reducing the effective length and/or propagation capability of the antenna created by the printed paper and lowering the level of radiated energy.
Abstract:
The invention concerns a method and a circuit arrangement for electrically driving print electrodes in an electroerosion printer by means of driver stages producing relatively strong and relatively short ignition pulses as well as by means of driver stages producing relatively weak burning pulses which are of longer duration than the ignition pulses. The burning pulse is first initiated and if an arc is struck, the ignition pulse is not required. Use of the burning pulse alone produces a sharp edge printing mark. Only if the burning pulse is unable to strike an arc is the ignition pulse delivered to assure that printing occurs.
Abstract:
The non-impact dot matrix printer is a high speed alpha-numeric, electric spark discharge printer that utilizes a rotating perforated dielectric belt in cooperative association with a laminar stack of insulated electrical conductors to control electric spark discharge printing on an electrical conductive erosive surface of a recording medium. The belt is disposed between the laminar stack and the conductive surface of the recording medium, and alpha-numeric characters are printed on the printing surface by applying a controlled source of voltage between the printing surface and the stack to cause spark discharging through the perforations in the rotatable belt, under the overall control of appropriate electronic circuitry.
Abstract:
In an electrosensitive recording member having a surface recording layer wherein the surface recording layer comprises a resin binder, a pigment dispersed through said binder and an effective amount of at least one particulate smudge inhibitor to inhibit the formation of smudge produced by the action of an electronic recording means on the surface of the recording member. The smudge inhibitor is a divalent metal palmitate or stearate, or N,N'-ethylene-bis stearamide, or mixtures thereof. The particulate smudge inhibitor is either incorporated into and dispersed throughout the surface recording layer or applied to the surface recording layer as a separate coating thereon.
Abstract:
Two electrodes are arranged within an insulating tube to have longitudinal contact with each other. One of the electrode wires is connected to a voltage source and the other can be pulled out of the insulating tube as it is consumed, as for electrode feeding in metal paper printers.
Abstract:
A printing apparatus for multiple signal printout has separate multiplexers for analog and pulse channels. The multiplexed analog signal is digitized, formatted, and applied via a selector to an adder, alternatively and selectively, the pulses are applied as digital signals to the adder. The adder receives zero offset numbers which differ for the different channels and the resultant numbers are applied to a one-out-of-n decoder driving printing electrodes. The system is under control of a cyclically addressed ROM whose outputs controls the multiplexing and furnishes the offset numbers. A clock sequencer times each acquisition frame.
Abstract:
In addition to having two lithographic layers of complementary lithographic character, an electrically inscribable lithographic printing blank may be provided with a solid but solvent-removable protective surface layer serving to inhibit spurious abrasion of the underlying layer during inscription of the blank and prior handling and storage. To prepare a printing plate from the blank, an electric current is passed between the blank and an electrical stylus so as to inscribe through the protective layer and immediately underlying layer and expose the bottom layer locally, whereafter the protective layer is removed by treatment with solvent to expose the surface of the underlying layer.
Abstract:
A method of purifying utero-evacuant extracts from the zoapatle plant is described. The method involves the purification of extracts from the zoapatle plant which contain an active principle utilizing chromatographic techniques.