Abstract: An electrographic printer device for printing tape-shaped recording media (10) in duplex and simplex printing contains two transfer printing stations (15/1,15/2) that can be pivoted against and away from the photoconductive drum (11). The first transfer printing station (15/1) serves for transferring toner images allocated to the front side, the second transfer printing station (15/2) serves for transferring back side toner images. A mechanical buffer storage (29) and a turn-over means (28) with preceding intermediate fixing station in the form of a photoflash fixing station (31) are arranged between the transfer printing stations (15/1,15/2).

Abstract: A document printer, configured as a check printer, in a check dispenser (18) contains a reading device (30), disposed immovably in the delivery-side transport duct (10) of the printer, for registering a consecutive-running control marking imprinted on the reverse of the checks. The reading device makes use of the transport motion of the check, during its passage through the printer and delivery, for scanning purposes.

Abstract: Power supply system having a buffered intermediate voltage which is supplied by an auxiliary voltage source in the event of failure of a principal voltage source, there being generated from the intermediate voltage by comparison with a threshold value a digital failure signal which both controls the auxiliary voltage source and is used to form a final failure signal.

Abstract: The invention relates to a dispensing unit for banknotes (42), comprising a banknote container (12) and a receiving module (14) which is in the form of the frame into which the banknote container (12) can be pushed. The unit includes an extracting and separating device for extracting banknotes (42) through an opening of the banknote container. The opening can be closed by a flap (26) and a closure plate (30). A retracting element (34) presses the banknotes against the extracting device by a force (P), before the flap is closed. The banknotes which are located in the banknote container are thereby forced away from the opening, back into the container interior. The retracting device is displaced in the direction of the extracting device (34) until the banknotes (42) come into the extracting position.

Abstract: In a system having modules (20), voltage supply (15), signal transmission via terminated signal lines (13) and signal ground (14), the impedance of the signal lines (13) with respect to both the signal ground (14) and the voltage supply (15) is identical, an AC coupling of the contacts for signal ground and voltage supply being effected on the modules and close to the termination of the signal lines.

Abstract: Document processing device, especially a document printer (10, 110), has a document issuing section which has a slit-like document issuing aperture (28) and a document support (16, 116) arranged downstream of the latter in the document issuing direction. There is arranged on the document support ( 16, 116), parallel to the document issuing aperture (28), a region (50, 150) which inhibits the sliding of a document and projects beyond at least parts (42, 142) of the document support (16, 116).

Abstract: An electrographic printing or copying machine contains, by way of example, a preheating saddle (20,21) positioned upstream of a pair of fixing rollers in the recording substrate running direction and a braking element (10). The preheating saddle (20,21) and braking elements (10) form a gliding surface (23). Suction openings (18,19) in fluid communication with a vacuum-generating device ensure good contact between gliding surface (23) and recording substrate. With the aid of a valve (1), the vacuum can be matched to the operating parameters of the printing and copying machine, or to the parameters of the recording substrate.

Abstract: The invention relates to a connecting rear wall (10) for subracks in electronic systems. Metal plates (14, 16) are mounted parallel to a wiring board (12) by being screwed thereto and simultaneously serve to feed the supply voltages and to screen high-frequency interferences. Cutouts (26) and openings (A) in the metal plates (14, 16) have a maximum dimension which does not exceed 1/10 to 1/20 of the wavelength of the interference signal of highest frequency which is to be screened.

Abstract: A cutting device for cutting a print carrier in a printer (10), especially in a till printer, has a blade (22) which is movable along at least one guideway (28) against a fixed counterblade (24) and which, in an open setting, frees an opening (20) to allow the printer carrier to be passed through and, in a closed setting, has at least partially cut through the print carrier. The blade (22) can be moved between the open setting and the closed setting by an adjusting mechanism. The blade (22) has at least two guide elements (38), which are disposed at a distance apart on the side facing away from the cutter (42) of the blade (22). The adjusting mechanism (30) engages in the guide elements (38) in order to adjust the blade (22).

Abstract: A developer station for an electrophotographic printing or copying machine has a developer chamber (12), a mixing chamber (13) and a developer-station sump (14) connected to the two chambers. Two developer-mixture circuits are produced in the developer station, namely a developer-mixture circuit for receiving fresh toner and a developer-mixture circuit for the actual development in a developer gap (18). A paddle roller (37) arranged in the developer-station sump (14) generates, in the outlet region of the mixing chamber (13), a mixture vortex which is enriched with fresh toner and from which developer mixture is extracted continuously for the development process. The mixture vortex serves essentially as a buffer store for compensating a high toner requirement during development and, in conjunction with the mixing chamber (13), for the triboelectric activation of the developer mixture.

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: The invention relates to a single contact spring, especially for RF-screening of electronic devices, for latch-locking into sheet-metal apertures. The invention envisages, in a first embodiment, that the single contact spring includes a latch cage (14) and a resilient contact part (2) configured as a contact cup (6), the latch cage (1) is generally configured in a trough shape and, in its lower part, trapezoidally in cross-section, being open at its two front ends and being provided on its two longitudinal sides with two opposing cutouts (16). The top edge of the longitudinal side is angled-off outward and the contact cup (6) is held by means of an angled-off, resilient carrier part (14) fastened to one of the front ends. The advantage of this spring is that it can be mounted in one mounting direction and can be laterally traversed. The contact cup can also, in a further embodiment, be configured in a roof shape.

Abstract: Single sheets A are drawn in the usual way from a first stack 8 of single sheets and conveyed on a first recording carrier conveying path 1. At its end there is a switch 10 which alternately feeds the single sheets A to a second and a third recording carrier conveying path 2, 3. In the second recording carrier conveying path 2 which is in the form of a loop, the single sheets A are shifted sideways by the width of one single sheet. A sideways shifted single sheet A1 and a single sheet A2 which has not been shifted sideways simultaneously reach a fourth recording carrier conveying path 4 on which they are conveyed in pairs to a printing unit D which spans the fourth recording carrier conveying path 4 and conveyed out of it again. Subsequently, one single sheet A1 per pair of single sheets is shifted back by the width of one single sheet in a fifth recording carrier conveying path 5 which is also designed as a loop while the other single sheet A2 is conveyed onwards linearly.

Abstract: A device for the releasable fastening of a fixing drum on a bearing flange of a fixing station in an electrophotographic printer or copier apparatus has a cone-shaped spreader element allocated to the bearing flange and also has a resiliently designed receptacle bushing having an inwardly disposed counter-cone that embraces the spreader element in the fashion of a collet chuck. An outwardly disposed seating surface for the seating of the receptacle bushing is provided at an inside radius of the fixing drum. For the fastening of the fixing drum on the bearing flange the spreader element spreads the receptacle bushing and presses it against the inside radius of the fixing drum.

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.