Siemens Aktiengesellschaft

Eduard Mair

Peter Sedlmeier

Ingeborg Busse

Hans Winter

Siegfried Zoeke

Gundolf Milde

Holger Schoenewolf

Peter Sedlemeier

The mounting rack has upper and lower outer walls which are each formed from two perforated shielding panels which are parallel to one another and at a distance from one another. As a result, the shielding attenuation of the mounting rack is considerably increased. In order to reduce the flow resistance, an intermediate space between the two shielding panels is filled with a congruently perforated insulator.

Sheilding device for an electrical module support

A shielding apparatus is connected in contacting fashion to a shielding ply of a backplane printed circuit board of a module chassis, is provided with contact openings at which the shielding apparatus can be contacted with metallic guide sleeves onto which plug connectors for light waveguides coming from the outside can be plugged. Specifically, contact openings are provided with star-shaped slots between which resiliently deflectable, radially resilient contact tongues are formed which engage an outside surface of the guide sleeves.

Shielding apparatus for a light waveguide plug arrangement

Shielded electrical mounting rack

Shielded multipolar connector

Shielding apparatus for an electrical assembly. A shroud that covers a front cover of the assembly is located at the front side of the electrical assembly that is insertable into a magazine. The shroud is snapped onto the front cover with retaining tabs and has laterally resilient contact tabs that are contacted by contact tabs of neighboring shrouds. As a result, the shrouds are directly connected to one another, so that only one electrical junction between the shielding parts is established per assembly. In particular, the shielding effect is so effective that the shrouds can be utilized in radio-frequency electrical systems.

Shielding apparatus for an electrical assembly

Method and arrangement for fixing toner images applied to a web-shaped

Spring contacts are arranged in the insertion direction between immediate-neighboring printed circuit boards of various assemblies, the contact locations in the spring contacts being at the distance of a parting line of the assemblies. The spring contacts are directly electrically connected to the printed circuit boards, more specifically to circuit interconnects thereof. As a result of this structure, a direct electrical connection between the printed circuit boards can be produced while avoiding plug-type connectors for the assemblies. The assemblies can nonetheless be individually inserted unimpeded in an arbitrary sequence.

Apparatus for electrical connection of insertable electrical assemblies

A paper web recording medium provided with toner images as conducted through a fixing housing containing solvent vapor over a paper deflection drum for fixing the toner images on the recording medium. The paper deflection drum is formed by a rigid roller body made of expanded or foamed plastic over which an elastic grid network fabric of toner-repellent material is drawn as an exterior surface sleeve. A low-mass paper deflection roller having low thermal conductivity is thus provided, so that no solvent vapor can condense at the surface of the fixing drum. The low-mass structure of the paper deflection drum also prevents a smear print when starting or stopping conduct of the paper web through the fixing housing.

Paper deflection roller for a printer or copier means functioning on the

A solvent vapor toner image fixing device for use with electrostatic printing or copying devices having a well-shaped container through which a paper web is guided in a loop shaped manner is provided with improved apparatus for sealing the operational opening of the container against the emergence of solvent vapor. The sealing means comprises a wedge-shaped sealing strip disposed beneath the upper reversing drum which conducts the paper web out of the container. The sealing strip defines an air flow gap with the drum which permits an introduction of air flow into the upper end of the container from which it exits through a narrow gap formed between an upper edge container wall and the upper surface of the paper guide member, thus forming a pressure zone at the upper end of the container which resists passage of solvent vapor out of the container. The assembly further includes a discharge housing through which the paper web immediately passes upon leaving the container. The discharge housing is provided with a forced air flow in counterflow relationship to the movement of the paper web such that solvent residues are evaporated from the paper web and prevented from being conducted away from the fixing station on the recording medium.

Device for fixing recordings consisting of powdery material applied to a

A device for monitoring the concentration of an air-vapor mixture in the fixing station of a non-mechanical printing or copying device has an ultrasonic transducer for generating and receiving an ultrasonic signal in the fixing station, the transit time of the ultrasonic signal between transmission and reception indicating the air-vapor mixture concentration in the station. The transit times are subdivided into at least three ranges of which the mean range or mean ranges identify a desired concentration. An evaluator circuit post-connected to the ultrasonic transducer forms signals corresponding to the ranges, the signals being entered in one of at least three status memories in accordance with their significance. The status memory which is filled first emits an output signal for triggering a corresponding reaction such as increasing the vapor density in the station, and cancels the contents of all of the status memories. False reactions as a result of brief and topically limited fluctuations from a mean concentration are thus largely avoided.

Device for monitoring the concentration of an air-vapor mixture

An ultrasonic measuring sensor for the fixing station of a non-mechanical printing or copying device has an electroacoustical transducer for both transmitting and receiving ultrasonic oscillation, and a reflector spaced a distance from the transducer for reflecting the oscillation transmitted by the transducer back to the transducer. The measuring path between the transducer and the reflector is surrounded by a fine mesh net having a mesh size which is significantly smaller than the wavelength of the ultrasonic oscillation. The mesh of the net is selected so as to permit the vapor concentration inside of the net to follow the changes in the average concentration at the fixing station with sufficient rapidity while shielding the measuring path against brief and topically limited concentration fluctuations.

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Munich, Germany

Eduard Mair