Abstract: The process is intended to establish whether the data transmitted by the transmitter (SE) to the receiver (EM) have been tapped and spuriously reintroduced at a later point in time and/or have been inadmissibly altered. For this purpose, the signature (S) assigned to the useful data (D) is enciphered symmetrically, using a combination of coupling data (K), characterizing the coupling between transmitter and receiver, and random data (Z), generated by a random generator. The coupling data are transmitted in plain text, the random data are enciphered. On the receiver side it can be established whether the transmitted message has been tapped and reintroduced at a later point in time if the coupling data are inadmissible.

Abstract: In order to produce keyboards, two pairs of diagonally connected squares with rounded corners are used as fixed contacts. A direct diagonal connection electrically connects two non-adjacent squares. The squares are conductive lacquer (carbon lacquer) and cover copper pads on a printed circuit board.

Abstract: A turnover device is provided having a W-shaped arrangement of hollow rod-like deflector rods and reverser rods with an automatic threading device. The turnover device receives continuous paper in an admission slot, self-threads the paper therethrough, and returns the paper through a discharge slot in a flipped-over manner for use with a multi-functional, electrographic printer device for printing a web-shaped recording medium in simplex and duplex printing. The rods are preferably hollow with air holes to provide an air cushion between the rod and paper. Guide channels are also preferably disposed over each rod to guide the paper thereover.

Abstract: In a thermal fixing system for fixing toner images on the front side of a recording medium in an electrographic printer or copier device, the back side of the recording medium already having a fixed toner image. The thermal fixing means contains a heat transfer fixing station that fixes the toner images on the recording medium, and contains a pre-heating saddle that precedes the heat transfer fixing station in a running direction of the recording medium. A sliding surface that accepts the recording medium over its back side is allocated to the pre-heating saddle. The sliding surface is constructed of a toner-repellant material at least in a contact region with the recording medium. A separating device can separate the recording medium from the saddle.

Abstract: For preserving and, thus, for extending the useful life of a picture tube of a picture tube screen device having a waiting state function. The filament current of the picture tube in the waiting state of the picture tube screen device is reduced by at least a slight percentage of an original filament current. Also, the picture tube is supplied with another video signal, in addition to an original video signal, that generates a beam current in the picture tube having a white image level that is at least a slight percentage of an original white image level generated by the original video signal.

Abstract: A turnover device for turning a web-shaped recording medium over between two electrographic printer or copier devices working in tandem mode, the crossing point of the turning elements is arranged offset a distance .pi.r/.sqroot.2 in the direction of the deflector element relative to the middle of the supplied recording medium, taking the cross sectional dimensions of the turning elements into consideration. A lateral offset of the recording medium is thereby avoided.

Abstract: A method for the adjustment of a disk cam, whereby an electric motor turns the disk cam out of a prescribed initial position by a prescribed rotational angle, comprising the steps of providing a disk cam having two markings in a prescribed angle from one another defining a target sector; sensing said two markings during the rotational motion of the disk cam by a sensor stationarily arranged outside the disk cam; in the initial position of the disk cam arranging the sensor having an angular spacing from a target radius of the target sector in rotational direction that is aligned to the rotational angle; identifying the running time of the passage of the markings at the sensor; and arresting the motor in response to the sensing of the second marking and supplying the motor with electrical energy for turning it in the opposite rotational sense, the amount of this energy dependent on the respectively identified running time, being taken from an energy/running time characteristic for the return of the disk cam to

Abstract: A process of scanning and evaluating binary data stored on a magnetic track of a magnetic storage card includes a calibration at the beginning of the scanning operation with certain information stored on the card and a determination of a calibrated time interval. A time curve of the output signal in the calibrated time interval is registered and compared to predefined curve patterns in order to determine deviation of the registered time curve from the curve patterns. A curve pattern showing a least deviation from the registered time curve is identified. The curve pattern may be selected on the basis of information obtained from a previously determined output signal curve. Also, the extreme values are detected to obtain information stored on the card.

Abstract: A device for sending and receiving graphical documents via teletransmission lines comprises an input station (16), a withdrawal station (20) for single-sheet graphical original, a transport system which transports the graphical originals along a reading device from the input station (16) to the withdrawal station (20), an output station (32) for a printed print carrier and a transport system which transports the print carrier material from material supply station (60) along a printer to the output station (32). The output station (32) is located in the head region and the withdrawal station (20) in the base region of the device. Both the input station (16) and the withdrawal station (20) for the printed originals in the base region (8) of the device (2) are arranged on two opposite sides (3,6) or the device so that the output station (32) in the head region (10) of the device (2) is located at a considerable distance from both the input station (16) and the withdrawal station (20).

Abstract: For assembly substitution actions during ongoing operation of a bus system, effects can occur that lead to oxidation of connecting contacts, to the destruction of assembly components or to the disturbance of bus signals because of the transmission of electrical energy via the connecting contacts of plug-type connectors (SP1 . . . SPn) of the assemblies (BG1 . . . BGn) when inserting or removing an assembly. Since bus signals can also be disturbed when the supply voltage is disconnected before the assembly substitution action, the bus system is inhibited before an assembly substitution action. After the conclusion of the assembly substitution action, the assemblies affected by the assembly substitution action are selectively reinitialized.

Abstract: Assembly of semiconductor chips is accomplished using an acrylate-based adhesive which can be cured rapidly by UV light and which gives an adhesive bond that is resistant to soldering by can be readily removed by solvents after soldering. During assembly, the back sides of the semiconductor chips are bonded to a temporary carrier by the adhesive and adjusted to the proper mirror image position on the carrier before the adhesive is cured. The chip array is then soldered on a component and the temporary carrier is removed from the chips by a solvent.

Abstract: A paper-separating device for prefolded continuous paper (12) which is drawn from a stockpile (11) a paper-transport device (44) and is fed to a printer, in particular a non-mechanical printer or photocopier includes a swivellable first deflecting element (32) is arranged between the paper-transport device (44) and the stockpile (11) and a second deflecting element (34) is arranged in stationary fashion in the swivel area of the first deflecting element (32). In a swivelled position of the first deflecting element (32), the paper web can be inserted into the paper-transport device of the printer. By swivelling the first deflecting element (32) into an operational position, the deflecting element grips the paper web (12) on one side and places it in the area of the second deflecting element (34).

Abstract: A paper feed device for feeding continuous stationery (12), provided with lateral perforations, into the transport elements (44) of a transfer station (17) of a non-mechanical printing device, in which paper feed device the transfer station (17) has in the transport direction of the continuous stationery paper transport belts (44) which are motor-driven both on the input and on the output side and engage in the lateral perforation of the continuous stationery (12), and a paper brake (31), which can be actuated when required, is arranged upstream of the input-side transport elements (47) in the transport direction. A switch device (D, C) is provided to feed the continuous stationery accurately after the continuous stationery (12) has been deposited in the output-side paper transport elements (48), which switch device drives the output-side paper transport elements (48) at least for a predeterminable feed time when the paper brake (31) is activated.

Abstract: An arrangement for the lateral positioning of a recording medium (100) in a printer or photocopier comprises a scanning arrangement (S) for establishing the ACTUAL position of the recording medium and a motor-drivable roll arrangement consisting of a counter-roll (201) and a pressure roll (205) which can be pivoted onto and away from the counter-roll (201), between which rolls the recording medium is guided. Furthermore, an apparatus (E) is provided for the controllable adjusting of the pressing force at the feed roll (205) on the counter-roll (201) along its roll length, and a control arrangement (P) which registers the ACTUAL position of the recording medium (100) via the scanning arrangement (S) and adjusts the pressing force of the feed roll (205) via the said apparatus (E) as a function of a predeterminable REFERENCE position. The arrangement is used preferably in the fuser station of an electro-photographic printer for the controllable lateral positioning of the recording medium (100).

Abstract: In a process for authenticating a user using a data station (16) in relation to a computer system (14) connected to the data station (16), a first value z is determined in the computer system (14) from an identification word (u) stored for the user in the computer system and a random number r generated in the computer system, and a second value y is determined in the computer system (14) from the password a given by the user and the random number r. The password a is encoded before being sent to the computer system (14) and coded there by a one-way function (30). As a result of these measures, the password a does not appear in the clear text at any point in the data transmission.

Abstract: For the representation of information mon a data display device with picture elements with different side ratios, the speed of readout from the picture information store is changed such that the different kinds of picture elements (A) and (A') are geometrically similar to each other.

Abstract: For purposes of the smooth and rapid checking out especially even of damaged goods labels, a process for the checking out of goods is proposed in which the data concerning them are automatically, and preferably also manually in the event of faulty checking, entered in the check-out device. In addition, at least two devices for implementing the process are described which have a goods check-out device with both an automatic scanning device and a manually operable input console. One of these devices also makes it possible to relieve and reduce the number of the service staff.

Abstract: An electromagnetic driving device for driving a print needle of a printer employing an E-shaped magnetic yoke. In order to improve print speed, the armature and arms of the yoke are specifically dimensioned. The precise lengths and widths of the armature and yoke provide an inductive circuit that minimizes both magnetic losses and inductance.