Abstract: A sufficiently thick gliding layer is produced on the recording surface of a record carrier of the type comprising an aluminum layer applied over a lacquer layer coated on a support layer. The back surface of the support layer is also coated with a lacquer layer. A fatty acid or a mixture of fatty acids is admixed with one of the two lacquer layers and a metal-diketone or a metal-keto-ester is admixed with the other lacquer layer in approximately in a stoichiometric ratio to the fatty acid. Following the coating of the material with aluminum in a vacuum, the record carrier material is wound into a roll, and stored.

Abstract: The invention concerns a method of recording information on an electrosensitive record carrier, preferably a record carrier covered with a metallic or metalliferous layer, by means of a print head movable relatively parallel to the surface of the record carrier and comprising at least one print electrode controllable by print pulses, and a control circuit for the timely generation of the print pulses from digital or analog signals received in such a manner that the duration and amplitude of each print current pulse are chosen so that the print process triggered by the individual print pulse is completed by the time the print pulse stops.

Abstract: A record carrier is formed with a substrate, a lacquer layer, and a metallic layer, with the lacquer layer containing from 0.5 to 5 percent by weight of fine particles of calcium carbonate.

Abstract: The invention concerns a process for producing compact, cellulose acetobutyrate based lacquer layers with a high degree of dullness for record carriers coated with a metallic or metalliferous layer, wherein high-molecular polysaccharides, having side chains and containing lignin, are admixed with the basic lacquer compound as a filler with a particle size distribution of less than 10 .mu.m and a molecular weight of about 10.sup.6.

Abstract: A storage circuit for editing printing data for metal paper printers in which the printer has a plurality of spaced electrodes arranged on a slope. The data in binary form are to be recorded in a matrix of rows and columns and are supplied in columnar fashion to a register from which they are grouped and read into a storage with corresponding bit positions of the groups being stored concurrently during a write operation. An address control appropriately places the stored bits to accommodate the spacing between electrodes for the respective data bits.

Abstract: For record carriers with a greatly varying thickness of the metal layer, the burn out process is effected dynamically with respect to the current strength. During the starting phase up to the beginning of the actual arcing phase a relatively high current is applied which is sufficient to burn out even thick metal layers. As burning out proceeds, the print current, after a particular arc voltage has been reached, is reduced in a short time, maintaining the arc and avoiding an undesirable burning out which would increase the print spot. For thinner metal layers the burn out current is correspondingly lower. The maximum burn out current is automatically adjusted to the thickness of the metal layer by measuring the arc voltage between electrode and metal surface of the record carrier. Suitable arrangements for controlling the burn out current are characterized by an (arc) voltage-controlled current control circuit.

Abstract: A record carrier for electro-erosion printers in which the surface of the lacquer (3) and consequently also the surface of the superimposed aluminum layer (5) show a multitude of shallow dimples (6) in the .mu. range which are very small compared with the front surfaces of the print electrodes, which are of maximum uniformity, and whose spacing is equally in the .mu. range.

Abstract: For record carrier material, the front and the back sides of which are provided with a lacquer layer and the front side of which is coated with an aluminum layer, one of the two lacquer layers is admixed with a material, such as metal azide, which forms a metal radical suitable for reacting with fatty acids, while at least one of the lacquer layers is admixed with a fatty acid or a mixture of fatty acids.

Abstract: To reduce scratches on the aluminum-covered front surface of a record carrier substrate having a back surface covered with a nitrocellulose lacquer, 0.1 to 2 percent by weight of a fatty acid, as referred to the weight of the wet lacquer, is added to the last applied layer of lacquer. When the record carrier is wound into a roll, the aluminum layer contacts and reacts with the fatty acid forming a sliding layer.

Abstract: A record carrier for an electro-erosion printer having an outer metal layer surface with roughness of high frequency, low amplitude and a soft, rounded-off waviness practically without edges or steps.

Abstract: A process for producing a mechanically stable, heat resistant lacquer for record carriers on a cellulose monobutyrate basis, whereby the cellulose aceto monobutyrate and a polyvinyl ester copolymer with long aliphatic side chains are mixed with each other and are processed in the form of a lacquer after addition of the fillers and/or pigments.

Abstract: After having been pretreated by kneading at its softening temperature, a cellulose acetate is subjected to block polymerization by being kneaded with, for example, an ethylene vinyl acetate copolymerizate, at its mean softening temperature. If necessary, the block copolymerizate may be subsequently cross-linked by adding a peroxide.

Abstract: The invention concerns a process for reducing, or completely eliminating, traces of abrasion or scratches on the surface of a record carrier covered with a thin metallic layer, preferably consisting of aluminum. The process is characterized in that the surface of the record carrier is covered with a 2 to 1000 nm thick layer of a metallic soap, preferably a saturated metallic soap, an unsaturated metallic soap or a mixture thereof.

Abstract: The lacquer contains a white pigment with a grain size bigger than all other pigments in the lacquer. This white pigment either changes its color itself under the influence of heat, or under the influence of heat with a substance coacting with the pigment. Preferably used is a natural or synthetic hard polymer, or in particular, calcium carbonate with an admixture of approximately 10% sodium glycolate.

Abstract: Step motor control in which a coded emitter disk is formed with a plurality of sensible secondary marks between each pair of primary motor step marks for use as different optional delay times for the generation of a motor advance pulse after a step mark is sensed. A circuit is disclosed to select predetermined ones of the secondary marks which will generate motor advance pulses in a closed loop system. This arrangement of secondary marks permits the elimination of circuits of fixed delays for feedback signals which are inappropriate when the motor load or temperature varies.

Abstract: Apparatus for and method of providing multiplex control for the plurality of electrodes in an electroerosion print head. This technique allows the elimination of a number of control leads originally required and reduces the cost of electrode drivers. Electrode spacing is modified slightly to accommodate the multiplexing control.

Abstract: Sheathed electrode for metal paper printer in which the core is of material having a higher melting point than the encasing material. This arrangement permits the use of electrodes having smaller cross-section and attainment of finer resolution since only the core is effective during marking.

Abstract: Control circuit for a print head of a metal paper printer in which electrodes are arranged on a slope, said electrodes being staggered in horizontal projection by the D-fold of their electrode width. The martrix-like structurized character to be printed consists of individual image elements stored in a main storage. This character information is read out column-by-column and written into predetermined locations of a read/write buffer storage. The write phase is followed by a readout phase of predetermined locations of the buffer storage for the direct addressing of the electrodes of the writing head. Write and read phases alternate. For determining the address of the storage locations during the write and read phases two counters are used in connection with a multiplier and an adder as well as a register for storing the D-value.

Abstract: In a high resolution electroerosion printer, a print head comprises a print head body of plastic or glass in which are embedded closely spaced glass tubes. The glass tubes provide low friction passageways for fine wire electrodes which extend through the glass tubes protruding beyond the print head body to be in uninterrupted flexible contact with the metal layer of a record medium. A pair of feed rolls frictionally engage the individual wires such that when the feed rolls are operated they can adjust the position of the wires to compensate for wear of the ends thereof in contact with the metal layer.