Abstract: A composition useful as an impregnant for the making of laminates for printed wiring boards including an epoxy resin a first cross-linking agent of a strene-maleic anhydride copolymer and a second co-cross-linking agent.

Abstract: In a cleaning arrangement for a moving element to be cleaned in an electrographic printing apparatus, a cleaning element is provided that has a cleaning member for cleaning which rests on a surface of the moving element to be cleaned. A drive unit for the cleaning element is provided that actuates the cleaning element such that the cleaning member cleans the surface of the moving element to be cleaned region-by-region.

Abstract: Laminates for printed wiring boards for the making of laminates for printed wiring boards having an impregnant including an epoxy resin, a first cross-linking agent of a strene-maleic anhydride copolymer and a second co-cross-linking agent.

Abstract: Laminates for printed wiring boards for the making of laminates for printed wiring boards having an impregnant including an epoxy resin, a first cross-linking agent of a strene-maleic anhydride copolymer and a second co-cross-linking agent.

Abstract: A composition useful as an impregnant for the making of laminates for printed wiring boards including an epoxy resin, a first cross-linking agent of a strene-maleic anhydride copolymer and a second co-cross-linking agent.

Abstract: A composition useful as an impregnant for the making of laminates for printed wiring boards comprises a FR4 epoxy resin which is a bisphenol A epoxy resin advanced with tetrabromobisphenol A, a crosslinking agent of a strene-maleic anhydride copolymer and a co-crosslinking agent is an optionally brominated bisphenol A and/or an optionally brominated bisphenol A diglycidyl ether.

Abstract: In a cleaning arrangement for a moving element to be cleaned in an electrographic printing apparatus, a cleaning element is provided that has a cleaning member for cleaning which rests on a surface of the moving element to be cleaned. A drive unit for the cleaning element is provided that actuates the cleaning element such that the cleaning member cleans the surface of the moving element to be cleaned region-by-region.

Abstract: A composition useful as an impregnant for the making of laminates for printed wiring boards comprises a FR4 epoxy resin which is a bisphenol A epoxy resin advanced with tetrabromobisphenol A, a crosslinking agent of a strene-maleic anhydride copolymer and a co-crosslinking agent is an optionally brominated bisphenol A and/or an optionally brominated bisphenol A diglycidyl ether.

Abstract: A resin composition comprising a copolymer of styrene and maleic anhydride (SMA) as cross-linking agent, an epoxy resin, and a co-cross-linking agent, characterized in that the co-cross-linking agent is an optionally brominated bisphenol A (BPA), or an optionally brominated bisphenol A diglycidyl ether (BPADGE), or a mixture thereof, and that the composition is free from an allyl network forming compound. The resin composition may be applied to make laminates and printed wiring boards.

Abstract: An electrographic printing device has at least one printing unit with a toner image carrier. A printing device for producing a toner image prints at least one mark on a photoconductor belt. The toner contained on the photoconductor belt is transferred to a transfer belt at a first transfer point and transferred from said transfer belt to a strip-shaped support material at a second transfer point. A sensor situated on the transfer belt detects the passage of the mark and a control unit determines the time that has elapsed between the time of printing and the time at which the mark is detected and controls the transportation of the strip-shaped support material accordingly.

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 can already have 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. The preheating saddle is designed as a low temperature saddle with the largest possible constructional length, so that a temperature difference between recording substrate and saddle surface is as small as possible. The preheating saddle has, in the recording substrate running direction, a plurality of heating zones.

Abstract: A method and apparatus for an electrographic printer or copier provides a first layer of toner particles is deposited on a first toner receiving surface by a force field. The amount of toner actually applied is detected at at least one point in the first layer. The force field is modified according to changes in the actual amount of toner from the predetermined amount of toner.

Abstract: A printer or copier and method generates toner images for transfer onto a recording medium. A latent charge image is generated on a photoconductor and is developed by the application of toner by at least one developer station to generate the toner image for transfer to the recording medium. A plurality of the developer stations are provided along the photoconductor to develop the images in color using a color separation method. A transfer band collects the color separations on top of one another to generate the overall toner image which is transferred to the recording medium. Multiple modules, each with developer stations, a photoconductor and a transfer band may be provided for one sided or two sided printing.

Abstract: A printer or copier device has a developer station with fixing drums for fixing the toner image on the recording medium. A guide yoke guides the recording medium to the fixing drums. The guide yoke includes a deflector edge over which the recording medium is fed. The deflector is replaceable and is formed of wear-resistant material in the region that contacts the recording medium. The deflector edge may include a deflector element with a plurality of deflection edges and which can be rotated to expose different edges.

Abstract: A method for operating electrographic printers or copiers uses toner particles of two different colors applied to a toner image carrier by at least two developing units. A force field is applied to at least one section of the travel path of the toner particles from a toner container to the toner image carrier to cause the toner particles to be carried in the direction of the toner image carrier. Changing the force field causes an interruption of the transfer of the toner particles with the developer stations are in a rest position.

Abstract: A printer or copier has a developer station for a toner image wherein a photoconductive drum is provided with a latent charge image that is developed by applying a toner/air mixture to a developer drum that in turn applies the toner to the photoconductive drum. The toner is charged by a charging device as it is applied to the developer drum. A sensor senses the toner on the developer drum and a control varies the quantity of toner applied. The sensor is an optical sensor or a capacitive sensor, and the charge applied to the toner by the charging device is varied depending on the sensor output. A voltage applied to the developer drum may also be varied.

Abstract: A printer for printing endless paper webs on both sides has two printing stations with a web turnover station therebetween. The paper web is fed in parallel side-by-side to the two printing stations which are on the same rollers. The drive of the web through the printer is by a positive drive, using pins to engage holes in the paper web, for example, into the first printing station. The drive of the paper web thereafter is by friction drive to permit slippage in the drive to compensate for variations in paper length during heating, etc. The slippage is controlled by brakes or other drag inducing devices acting on one or both of the two portions of the paper web.

Abstract: An electrographic printer with a printing unit that comprises a photoconductor provided with a toner image during the printing process and which further comprises a corona device arranged at a distance from the photoconductor that generates an electrical field during the printing process for transferring the toner image onto an endless carrier material is provided. The printer, in a first operating mode, can print a first web section of the endless carrier material conducted along a transport path and, in a second operating mode, can simultaneously print a second web section conducted along a parallel transport path and arranged next to the first web section at a distance therefrom. The length of the electrical field generated by the corona device is adjustable according to whether a first web section or a first and second web section is transported along the transport path.

Abstract: A printer for optionally printing the front side and back side of a band-shaped recording medium has a feed device to move the recording medium from the front side printing and fixing stations to a turn-overs station where it is turned over and returned to the printing and fixing station to print the back side. Pairs of driven rollers are provided in the paper channel to move the recording medium, wherein the frictional forces on the recording medium by the rollers can be set. The rollers are reversible and can also be swivelled out for certain printing modes and recording media sizes. Automatic threading of the recording medium is provided.

Abstract: An electrographic printer has an intermediate medium for simultaneously printing a first web section of an endless medium and a second web section arranged next to and at a distance from the first web section. Both web sections are drawn along a path past the intermediate medium by a transport system. During the printing process, a tensioning device biases the first and second web sections against the intermediate medium. A web-tensioning unit located downstream relative to the direction of transport of the transport device, applies a traction force to the web sections in the direction of travel. In addition, a first compensation device and a second compensation device separated from the first compensation device are provided between the transport device and tensioning device. The compensation devices bias the first or second web sections as appropriate, against the direction of transport during the printing process.