Abstract: An apparatus applies a coating composition consisting of a resin and fine abrasive particles like corundum particles, to a paper web by feeding the composition to the paper web as it loops around a guide roller to a metering roller juxtaposed with the guide roller. The coating composition, which may develop stripes, is then equalized with a structured roller engaging the paper-web pass leaving the guide roller and formed with at least one thread-like structuring element which may be followed by or preceded by a doctor blade arrangement or a smooth-surfaced roller.

Abstract: The invention relates to a device for applying a coating substance to a continuous paper web in a process for producing abrasion-resistant laminates for manufacturing decorative paper. The coating substance consists of a viscous mixture of melamine resin and alphacellulose to which particles of corundum are added, and is applied to the visible surface of the paper. The inventive device includes a deflector roll (2) on which the paper web (1) lies in an area in which it loops around; a metering roll (6) which is arranged parallel to the deflector roll (2) and forms the boundary of a gap with the same, and which is driven synchronously or almost synchronously with the deflector roll; a slit nozzle (7) for applying the coating substance either directly to the paper web (1) on the deflector roll (2) or to the metering roll (6); and a doctor blade of a rectangular piece (9) of flexible rubber type material.

Abstract: A system for treating a porous web with a liquid treatment liquid continuously moves the web along a path sequentially through a saturating station, steaming station, and drying station. A drum in the saturating station engages a back face of the web and a trough closely surrounds the drum and confronts a front face of the web. Seals form between the drum and trough a generally closed and pressurizable chamber through which the web passes and which is supplied with the treatment liquid at superatmospheric pressure so as to force the liquid against only the front face of the web. In the steaming station jets of steam are directed against the back face of the web to heat the web and disperse the treatment liquid throughout the web. The web is heated and dried in the drying station.

Abstract: A paper web impregnated with a liquid resin and following impregnation is coated with an abrasive particle containing coating mass or composition and then dried before a liquid resin is applied which does not contain the abrasive particles. The web is then finally dried and the resulting paper is particularly suitable as a cover sheet in the hot pressing of laminates since it minimizes wear of the laminate press.