Abstract:
The invention relates to microcapsules the polymer wall of which has thermo- and/or photolabile groups as the structural element. Said groups are obtained by interfacial surface polycondensation of azo group-carrying monomers with correspondingly reactive more functional compounds to form polyamides, polycarbonates, polyesters, polyureas or polyurethane.
Abstract:
An inking ribbon for thermographic printers contains components which can be decomposed by heat or radiation, in particular components which liberate a gas on decomposing. The ink-transfer regions (decomposition regions) of inking ribbons manufactured in this way are more sharply defined, the heat output required for printing is reduced, and adherence of the ink to the paper is improved.
Abstract:
In the printing process proposed, a multiplicity of image data (BD), each describing the half-tone gradation of a screen dot (RP) of the original image (VB), are transferred to processing zones (V15). From the image data (BD) in the processing zones (V15), colour-gradation values (FS0...FS5) are obtained which determine the shades of coloured dots (FP0...FP5) produced at selected points (DP) on a print screen. In order to produce a reproduction image (WB) with a large number of half-tone gradations (HS0...HS65), and at the same time achieve high resolution in areas of the original image (VB) showing a pronounced change in contrast, a colour-gradation value (FS1...FS5) is obtained from each item of image data (BU) by virtue of the fact that a colour-gradation value (FS1...FS5) in a reference pattern (R0...R65) associated with the half-tone graduation concerned (HS0...FS65) is allocated in accordance with the half-tone gradation (HS0...HS65) described by the item of data and its position (01...013) in the processing zone (V15).
Abstract:
In a recording device (1) powered by at least one rechargeable accumulator (2), the number of recording processes is limited by the capacity of the accumulator (2). In order to reduce the power requirement of the recording device (1) and thus obtain a greater endurance, the recording device (1) is set to stand-by position (Z3) during inoperative periods in which its control electronics (22) runs in a power-saving mode. If a charger (3) is connected the accumulator (2) is then charged. An activating signal sets the recording device (1) to a ready state (Z4) provided that the accumulator (2) is sufficiently charged. To reduce the power requirement further, the recording device (1) is separated from the accumulator (2) in the stand-by position (Z3) by opening an electric switch (12) if it has been on stand-by for a certain time. The state of charge of the accumulator (2) is monitored and, when it falls below a certain level with the charger (3) off and the recording device (1) electrically switched off (2), it is set to stand-by (Z3) with the charger (3) switched on. Power supply to recording devices.
Abstract:
In a process for printing a half-tone image by means of individually controllable printing elements (E1...E7), the half-tone image is made up of pixels (BE) which are formed of several printing positions (11, 12, 21, 22) arranged on a grid on which colour points (FP1...FP4) may optionally be laid. The size and/or optical density of each colour point (FP1...FP4) are adjusted stepwise from a colour step value (F0...F4) obtained from printing data (D1). In order to increase printing speed and reduce storage requirements, a paginated store (S) with at least two storage pages (S1, S2, S3) is used to store the colour step values; each printing position (11, 12, 21, 22) has a binary storage cell (B, G0, G1) allocated on each storage page (S1, S2, S3) allocated to it and the content of the storage cells allocated to the same printing position (11, 12, 21, 22) is logically interlinked (D3) with all the pulses (P1, P2, P3, P4) of the printing elements (E1...E7) for control.
Abstract:
The invention relates to a process for producing thermo- and/or photolabile microcapsules containing an aqueous phase by interfacial surface polycondensation of a dispersion with an aqueous continuum stabilized by a dispersing agent, and to a microcapsule containing an aqueous phase and an active substance; the wall of the capsule is a polymer containing an azo (-N=N-) or peroxo (-O-O-) group.
Abstract:
In a known functional component with a plurality of electrical functional elements closely aligned in linear fashion on a substrate, the functional elements are connected in groups to collecting lines connected by connecting lines to selector switches so that groups of functional elements can be actuated in succession. To prevent undesirable contacts in the region of the functional elements, the connecting lines (8) are designed as thick-film tracks on the substrate (11), on a plane below the functional elements (2) from which they are separated by an insulating layer (15), and are connected to the corresponding collecting lines (4) in the region of the front edge (12) of the substrate. The functional components can be thermal printing heads, light-emitting diode components, or line sensors.
Abstract:
In micro-capsules with a polymer wall, the polymer of the capsule wall contains thermolabile and/or photolabile fracture points in the form of azo functions (-N=N-) or dioxy functions (-O-O-) to permit the contents of the capsule (various effective agents, e.g. dyes, medicaments, developers, curing agents, flame-protection agents) to be intentionally released under the action of temperature and/or light.
Abstract:
In a functional component with a plurality of electrical functional elements closely aligned in linear fashion on a substrate and connected to integrated circuit (IC) components, manufacturing defects are virtually evitable as the distance between the functional elements decreases. By grouping the input lines (19) to the circuit components (5) by means of underlying connecting lines (13) to common contact connections (12) and by forming below the line (17) with the functional elements a return conducting layer (23) which extends to the contact connections (12) in order to return the sum of all the individual currents flowing through the functional elements, a functional component (1) is obtained from which defect-free segments can be removed and used individually or in groups. The functional component can be, for example, a thermal printing head, a light-emitting diode component or a line sensor.
Abstract:
In known thermal printing processes, in which rows of heating elements in a thermal printing head are selectively controlled in consecutive control cycles, a relatively high-powered voltage source is required to supply the heating elements. In the new process, the power to be supplied by the voltage source (2) is low and the output voltage of the latter is varied according to the number of heating elements (R1...Rn) selected simultaneously for printing in each control cycle in such a way that the voltage source supplies the maximum power required; at the same time, the duration of control of the heating elements (R1...Rn) and the feed rate of the recording support to be printed (10) are regulated so that the energy expended per unit surface of the recording support (10) remains virtually constant.