Patent DE-102010041505-A1 (DE)
Title: Device for applying a liquid or pasty medium to a moving fibrous web such a paper, bank note paper, cardboard or packaging paper web on both sides, comprises a first application roller and a second application roller, and a feed device
Inventor: SCHILZ ANDREAS
IPC: D21H23/38
Filed: 2010-09-28
Abstract: The device (1) for applying a liquid or pasty medium (2) to a moving fibrous web such a paper, bank note paper, cardboard or packaging paper web on both sides, comprises a first application roller and a second application roller, which extend over the width of the moving fibrous web and which form a roller gap having a roller inlet area, where the moving fibrous web is fed through the roller gap, and a feed device (7) for feeding the liquid/pasty medium into the roller inlet area of the two application rollers. A liquid sump (8) is formed in the roller inlet area of the application rollers. The device (1) for applying a liquid or pasty medium (2) to a moving fibrous web such a paper, bank note paper, cardboard or packaging paper web on both sides, comprises a first application roller and a second application roller, which extend over the width of the moving fibrous web and which form a roller gap having a roller inlet area, where the moving fibrous web is fed through the roller gap, and a feed device (7) for feeding the liquid or pasty medium into the roller inlet area of the two application rollers. During the operation of the device, a liquid sump (8) is formed in the roller inlet area of the two application rollers. The moving fibrous web runs through the liquid sump and the level of the liquid sump is adjusted by the feed device. An immersion bath device (10) that accommodates the liquid or pasty medium is arranged upstream from the liquid sump and the roller gap as viewed in the web movement direction of the moving fibrous web. The immersion bath device has a liquid level of 300-800 mm for the liquid or pasty medium. The immersion bath device is formed as a feeding device for the liquid sump formed in the roller inlet area of the roller gap of the both rollers, is implemented in two-part and has an adjustable nozzle gap, which comprises two parallely spatial nozzle walls, through which the moving fibrous web is guidable and which open for threading the moving fibrous web. The nozzle gap has an adjustable gap width of 0.5-1 mm. The adjustment of the nozzle gap of the immersion bath device takes place by using a worm gear screw jack and associated linking device. Both nozzle walls forming the nozzle gap and spaced in the operation of the device are fixedly implemented. One of the both nozzle walls forming the nozzle gap and spaced in the operation of the device is flexibly implemented at the outlet side. The outlet side flexibly implemented nozzle wall comprises a pre-stressed bent-blade, a wiper lip and a water puller at the outlet side. The moving fibrous web in the area of the immersion bath device has a web angle to the verticals by up to 5[deg] . An independent claim is included for a method for applying a liquid or pasty medium to a moving fibrous web such a paper, bank note paper, cardboard or packaging paper web on both sides.