Abstract: A device for applying a free-flowing medium to a continuously conveyed web, wherein the medium can be transferred to the web by a continuously rotating transfer (gravure) roll. An application head is provided in order to transfer the free-flowing medium to the circumference of the gravure roll. The application head includes a chamber which is open toward the circumference of the gravure roll and has an inlet and an outlet for the medium to be applied. The front outer face, in the direction of rotation, of the chamber is delimited by a front doctor blade and the rear outer face, in the direction of rotation, is delimited by a rear doctor blade. Both doctor blades are seated against the circumference of the gravure roll. The front doctor blade can be pressed against the circumference of the gravure roll by a pressing body with an adjustable pressing force.

Abstract: A device for applying a free-flowing medium to a continuously conveyed web, wherein the medium can be transferred to the web by a continuously rotating transfer (gravure) roll. An application head is provided in order to transfer the free-flowing medium to the circumference of the gravure roll. The application head includes a chamber which is open toward the circumference of the gravure roll and has an inlet and an outlet for the medium to be applied. The front outer face, in the direction of rotation, of the chamber is delimited by a front doctor blade and the rear outer face, in the direction of rotation, is delimited by a rear doctor blade. Both doctor blades are seated against the circumference of the gravure roll. The front doctor blade can be pressed against the circumference of the gravure roll by a pressing body with an adjustable pressing force.

Abstract: To provide uniform treatment criteria over the entire surface of a material web (10) in the region of a drying chamber (11), the treatment air or intake air is directed onto the material web (10) from above and below by means of slot nozzles (19, 24) from nozzle boxes (17, 18). The return air reflected from the material web (10) is conducted away upwards and downwards via return-flow ducts (25, 26) in the nozzle boxes (17, 18) into a collection space (34), on the one hand, and a return-air space (35), on the other hand.). The return air is conveyed upwards from the lower return-air space (35) through return-flow shafts (36, 37) into the region of the upper collection space (34).

Abstract: A running web of thermoplastic material is uniformly relaxed across its width by monitoring the tension in its marginal sections and by adjusting the corresponding heaters adjacent the path of the marginal sections. The median section of the web is relaxed in response to generation of a signal which denotes the tension profile across the entire web and is obtained as a result of the processing of signals which denote the monitored tension in marginal sections of the web. Those sections of the web wherein the tension is higher are heated less intensively than the sections wherein the tension is lower.

Abstract: A running strip-shaped substrate of paper or thermoplastic material is provided with several layers of adhesive or other coating material at a transfer station where it comes in contact with discrete layers of coating material which are supplied by individual belt conveyors and are heated during travel with the respective conveyors to promote the expulsion of solvent which is gathered by individual streams of an inert gas flowing counter to the direction of travel of the layers with the conveyors. The layers are heated by the respective conveyors each of which is heated by a discrete heating device.

Abstract: Apparatus for regulating the flow of a fluid from a supply conduit at one end of an elongated housing to a nozzle having one or more orifices extending longitudinally of the housing has a partition which is installed in and divides the interior of the housing into a first compartment receiving fluid from the conduit and a second compartment communicating with the orifice or orifices of the nozzle. Two marginal portions of the partition are adjacent the bottom wall of the housing at opposite sides of the nozzle and define with the bottom wall a number of paths in the form of passages and/or channels for the flow of fluid from the first compartment into the second compartment. The inclination of the marginal portions of the partition relative to the bottom wall of the housing is adjustable by hand or by one or more motors to thereby select the rate of fluid flow along the respective path or paths.

Abstract: Solvent which is contained in coating material to be applied to a running web is recovered in a chamber which is sealed from the atmosphere and wherein the solvent-containing coating material is first applied to one or more endless belt conveyors which transport the respective layers to discrete transfer stations for application to the running web. Streams of an inert gaseous fluid are circulated through the chamber to withdraw the solvent and to convey it into a condenser wherein the solvent is recovered from the gaseous fluid. The inert gaseous fluid is heated to promote the expulsion of solvent from the coating material on the conveyor or conveyors. The web can be provided with a base coat upstream of the first transfer station so that the layers of coating material are applied over the base coat. The latter is dried upstream of the transfer stations.