Abstract:
An electrophotographic process and arrangement for generating a macro-charge zone inkable by toner applicators and delimited by an inking limit (EG) having an adjustable contour on a photoconductor of a printing or copying machine use at least one lighting- and position-variable controllable light source (LED), such as a LED-comb arrangement or laser. By controlling the lighting power of the light source and its photoconductor irradiation position, and by adjusting a bias voltage (UB) applicable between the photoconductor and the toner applicator, an electrostatic potential relief (UR) made of individual adjacent micro-charge zones (UM) of lighting-dependent size is generated on the photoconductor and the inking limit (EG) is set. The contour of the inking limit is determined by the bias voltage level (UB) on the potential relief (UR). This process and arrangement allow an offset-like printing quality to be obtained, both of half-tone images and of lines and characters.
Abstract:
Two pairs of diagonally linked squares with rounded edges are used as fixed contacts in the production of keyboards. A direct connection is ensured in the diagonal direction; the squares consist of conductive lacquer (carbon lacquer) and cover copper pads on a printed circuit board.
Abstract:
With the single-sheet delivery device of the invention, the individual sheets (2) coming from a printing device are laid down in stacks. The single-sheet delivery device has a single-sheet acceptance plate (4) surrounded by single-sheet alignment means (11, 12, 13) which align the single sheet (2) in such a way that its edge regions project in front of the surface of said acceptance plate (4). In the stacking direction (55) above the single sheet acceptance plate (4) there is a single-sheet cassette (15) with an aperture at the bottom. Supports (18) reducing the cross-section of the aperture are arranged within the periphery of said aperture. The cross-section of the aperture determined by the supports (18) is smaller than the area of a single sheet to be delivered and the sheets to be delivered (2) are pushed through the aperture by the single-sheet acceptance plate (4). The edges of the last single sheet (2) pressed through the aperture of the single-sheet cassette (15) are supported on the supports (18). The stacks (21, 24) of single sheets can be taken from the single-sheet cassette (15) by an operator without interrupting the delivery process.
Abstract:
An electrophotographic printing or copying machine has a cooling device (K) for the heated recording medium arranged downstream of the thermofixing device (W) in the direction of transport of the copying medium. The cooling device (K) consists of a cooling saddle through which the cooling medium flows and which has a cooling surface (19) over which the recording medium is guided so as to cover the cooling surface (19). The cooling surface may have air outlets (20) through which air is supplied into a gap between the copying medium (17) and the cooling surface (19) so as to form an air cushion. Additional cooling devices may be provided for further cooling the copying medium by generating a current of cooling air blown over the surface of the copying medium against its direction of transport.
Abstract:
A till has a quadrilateral housing (10) with an open front wall into which can be slid a drawer (20) with a lower part (22) and an insert (24, 26) subdivided into compartments. The insert has a first removable section (34) next to the front wall (32) of the drawer (20) and a second rear section (26) movable on the lower part (22) of the drawer in a direction parallel to the sliding direction of the drawer (20) between a first position, in which it covers the bottom the lower part (22) of the drawer, and a second position, in which it gives free access to the rear bottom zone of the lower part (22) of the drawer.
Abstract:
In order to produce screen angles in digital printing, for the purposes of converting separated, digitally coded signal-screen values (SRW) containing the grey value/colour intensity of pixels of an image pattern (BV), a plurality of at least two different half-tone cells (HZ) taking account of the outer shape of the screen angle to be produced in a superior half-tone cell block (HZB) with i cell element columns and j cell element rows are continuously mutually allocated in accordance with a principle of order to the screen angle to be produced. The various half-tone cells (HZ) are thereby differentiated in relation to thresholds (SW) allocated to the cell element (ZE) by at least one threshold level. The half-tone cell block (HZB) is periodically arranged in an nxm screen plane (HZF). It is thus possible to find the thresholds (SW) needed for conversion according to the pseudo half-tone method with the aid of a modulo calculation (mod i, j) from the half-tone cell block (HZB).
Abstract:
The device is used when attaching a round cable (30) to a flat plug. The device is used to isolate and flatten the leads of the round cable (30). It comprises at least one retaining template with a base plate (4) on which several leads (26) may be laid side by side and with a clamp (36) for pressing the leads on the base plate (4) which can be laid upon or lifted off said base plate. The clamp (36) comprises a flexible strip which, by means of a rolling movement transversely to the direction of the leads (26), can be laid upon or removed from the base plate (4). In addition, the flexible strip (36) is securely arranged in relation to the base plate (4) at one end and has a rolling and unrolling mechanism (48) which is adjustable over the base plate (4) transversely in relation to the leads (26).
Abstract:
The invention relates to a printing or copying device with a photoconductor drum (10) to record two adjacent toner images for a verso and a recto of a recording medium (15). There are two separate transfer ribbons for the verso and recto toner images for the simultaneous transfer of the toner images to the recording medium (15). A transfer ribbon is diverted via a guide device in such a way that the transfer ribbons (T1 and T2) are arranged one above the other in a fixing station (19) in the form of a thermoprinting fixing station. The recording medium (15) is guided between the transfer ribbons (T1 and T2) and thus printed recto-verso simultaneously.
Abstract:
The belt-conveyor thermo-fixing station described includes upper and lower belts (31/1, 31/2) which are disposed above and below a feed channel (32) and are heated by an infra-red heater (36) located between the belts. The fixing belts (33/1, 33/2) pass round the fixing roller and the pressing roller, and round an additional guide roller (34) mounted at the input end of the fixing station. This gives a feed channel (32) which is wedge-shaped in cross-section, making it possible to feed the individual sheets gently into the fixing station. In order to avoid stripping defects, the fixing belts can be passed in addition over guide rollers (45) mounted at the output end of the fixing station.
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 z 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.