Hoechst Aktiengesellschaft

Joachim Stroszynski

Peter Lehmann

Franz Durst

Raimund Haas

Werner Interthal

Gerhard Sprintschnik

Gerhard Mack

Heinz Boergerding

Manfred Dammann

Walter Niederstatter

Herbert Zeisel

Guenter Hultzsch

Horst Faust

Kurt Reiss

Dieter Bohm

Walter Niderstatter

A band-changing apparatus for flying band change which consists of two unwinding stations which are arranged adjacent to a band changer. From the respective unwinding stations, a new band and a running-off band are brought together in the band changer in a V-shaped manner from the top downwards through two channels and enter into a pressure-roller unit rotary stops are provided in the channels for controlling movement of the respective bands. The band changer also possesses two rotary crosscutters for cutting the bands to size. The new band is equipped with an adhesive strip which leads to an adhesive bond with the running-off band in the pressure-roller unit.

Band-changing apparatus for a flying band change

An apparatus for guiding a coated material strip through a dryer has a plurality of guide elements disposed in the dryer so that the plurality of guide elements are equally-spaced. The plurality of guide elements each have a gas-permeable guide face which faces an underside of the coated material strip. A device for supplying a gas to the plurality of guide elements is provided so that a gas stream passes through each of the gas-permeable guide faces and supports the coated material.

Process and apparatus for guiding a coated material strip

A mechanically roughened substrate is conveyed through an electrolytic bath and is given a superposed electrochemical roughening, which is carried out by means of electrodes which are arranged in the electrolytic bath at a specific spacing from the substrate. The electrodes are connected to corresponding windings on the secondary side of a three-phase transformer. The corresponding windings on the primary side of the three-phase transformer are connected to a three-phase frequency converter, to which three-phase current is applied via leads. The three-phase frequency converter transforms the line frequency of the three-phase current supplied into a frequency range of about 50 to 300 Hz at a voltage of between about 1 and 380 V.

Apparatus for roughening a substrate for photosensitive layers

A distributor tube has tube slots in its shell surface transversely of the inflow direction of a fluid into the distributor tube. A casing tube is enclosed by the distributor tube and is divided into flow chambers, each of which is bounded by two annular plates and connected to an inlet sector. A star-shaped volume flow divider is located on the inlet side of the distributor tube as a tube insert, which divides the introduced mass flow rate into partial flow rates for the flow chambers. In another embodiment, the distributor tube encloses a rotationally symmetric pressure distributor, whereby the fluid within the distributor tube encounters equal pressure in the radial and axial flow directions over the inlet length of the distributor tube.

Process for the uniform introduction of a fluid, and apparatus for

Process and apparatus for roughening a substrate for photosensitive

A process for drying a liquid layer which has been applied to a carrier material moving through a drying zone and which contains vaporizable solvent components and non-vaporizable components, wherein a drying gas flows in the longitudinal direction of the carrier material parallel to the liquid layer and is accelerated in the drying zone in the direction of flow, is disclosed. Also disclosed is a device for accomplishing the drying process, comprising a drying channel through which the carrier material bearing the liquid layer runs in the longitudinal direction, and a gas-permeable channel-covering surface, through which the gas stream flows into the drying channel.

Process and device for drying a liquid layer applied to a moving carrier

The present invention relates to a roughened printing plate support of aluminum or an alloy thereof, which shows equally distributed tubular depressions. Furthermore, a process for the production of the printing plate-support is disclosed, in which roughening is performed in an acidic electrolyte by means of a pulsed direct current. The invention also relates to arrangements which are suitable for carrying out the process.

Process and arrangement for production of printing plate support

Disclosed is a sheet, foil or strip material comprising aluminum or an alloy thereof, which is first mechanically and then electrochemically roughened on one or both surfaces to produce the following parameters:

Sheet material of mechanically and electrochemically roughened aluminum,

Device for continuously anodically oxidizing aluminum strips on one

Disclosed is a process for the production of a material in the form of a plate, a foil or a strip, from aluminum or an alloy thereof, which has been chemically, mechanically and/or electrochemically roughened. The process comprises a two-stage oxidation involving a first stage (a) which is performed in an aqueous electrolyte having from about 60 to 180 g/l of phosphoric acid, at a temperature of the electrolyte bath of about 47.degree. to 70.degree. C. and at a voltage of about 36 to 80 V and a second stage (b) which is performed in an aqueous electrolyte having from about 60 to 300 g/l of sulfuric acid, at a temperature of the electrolyte bath of about 30.degree. to 65.degree. C. and at a voltage of about 15 to 35 V. Also disclosed is an offset-printing plate, having a radiation-sensitive coating and a support material produced by the process described above.

Two-stage process for the production of anodically oxidized aluminum

This invention relates to a printing plate comprising a support bearing either

Printing plate

This invention relates to a method for freely suspending a moving web of material in a gaseous medium, which comprises impinging a stream of the gaseous medium over the entire width of one surface of the web in order to produce a first stationary stable pressure zone, forming at least one stationary stable suction zone adjacent said first stationary stable pressure zone, deflecting the gaseous medium passing beyond the edges of the web in order to produce a second stationary stable pressure zone on the opposite side of the web, and regulating said pressure and suction zones in order to maintain the web in a freely suspended state. The invention also includes an apparatus for performing the method.

Method and apparatus for freely suspending moving webs of material

Disclosed is a process for the manufacture of a series of photoconductor webs spaced apart from each other on a carrier web by electrically conductive spacing strips extending transversely of the carrier web, comprising (a) transporting a carrier web having an electrically conductive surface disposed thereon in a feed direction across a backing member and in close proximity to a slot die arranged transversely to the feed direction; (b) pumping a photoconductive coating solution into the slot die; (c) flowing the photoconductive solution intermittently from the slot die orifice onto the carrier web for periods of time sufficient to produce the spaced photoconductor webs, the flow of the coating solution being substantially uniform during each coating period and the entire quantity of coating solution required for each coated photoconductor web being extruded from the slot die orifice in the form of a substantially uniform stream; (d) maintaining the distance between the carrier web and the die orifice constant and so small that the coating solution issuing from the die orifice forms a bridge between the orifice of the slot die and the carrier; and (e) drying the coated material. Also disclosed is an apparatus for carrying out the foregoing process.

Apparatus for the manufacture of a series of photoconductor webs

Disclosed is a process for the manufacture of a series of photoconductor webs spaced apart from each other on a carrier web by electrically conductive spacing strips extending transversely of the carrier web, comprising (a) transporting a carrier web having an electrically conductive surface disposed thereon in a feed direction across a backing member and in close proximity to a slot die arranged transversely to the feed direction; (b) pumping a photoconductive coating solution into the slot die; (c) flowing the photoconductive solution intermittently from the slot die orifice onto the carrier web for periods of time sufficient to produce the spaced photoconductor webs, the flow of the coating solution being substantially uniform during each coating period and the entire quantity of coating solution required for each coating photoconductor web being extruded from the slot die orifice in the form of a substantially uniform stream; (d) maintaining the distance between the carrier web and the die orifice constant and so small that the coating solution issuing from the die orifice forms a bridge between the orifice of the slot die and the carrier; and (e) drying the coated material. Also disclosed is an apparatus for carrying out the foregoing process.

Growing community of inventors

Wiesbaden, Germany

Joachim Stroszynski