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1. 发明公开

EP0651095A1 Method and assembly for coating a moving web 失效
标题翻译： Verfahren und Vorrichtung zur Beschichtung eines laufenden Bahnes。
公开(公告)号：EP0651095A1
公开(公告)日：1995-05-03
申请号：EP94115045.0
申请日：1994-09-23
申请人： VALMET PAPER MACHINERY INC.
发明人： Paloviita, Petri , Koskinen, Jukka
IPC分类号： D21H25/16 , D21H23/72
CPC分类号： D21H23/72 , D21H25/16
摘要： A method and an assembly for coating a board or paper web (5) with the help of an air knife (4) as the doctoring means comprising a first backing roll (1) which backs the web during the application of the coating mix to the web (5) and a second backing roll (3) around which the web (5) passes after the coat application and which backs the web during the smoothing of the coat with the help of the air knife (4). The invention is based on applying the coating mix to the web (5) with a correct thickness of the coat by means of a slot-orifice applicator apparatus (2). In the applicator apparatus (2) the coating mix flow is directed in a reverse direction to the travel of the web (5) and only a desired portion of the flow is allowed to adhere to the web (5), whereby the critical doctoring process in the region of the air knife (4) can be easily optimized under varying process conditions.
摘要翻译：一种用于在气刀（4）的帮助下涂覆板或纸幅（5）的方法和组件，因为刮刀装置包括第一背衬辊（1），其在将涂层混合物施加到纤维网（5）和第二背衬辊（3），所述纤维网（5）在所述涂层施加之后通过所述第二背衬辊（3），并且在所述涂层的平滑期间借助于所述气刀（4）而将所述纤维网背后。本发明基于通过狭缝孔施加装置（2）将涂层混合物施加到具有适当厚度的涂层的幅材（5）上。在涂抹器装置（2）中，涂层混合物流动与纸幅（5）的行进相反的方向被引导，并且只有流动的期望部分被允许粘附到幅材（5）上，由此临界刮除过程在气刀区域（4）可以在不同的工艺条件下轻松优化。

2. 发明公开

EP0606874A1 Method and assembly for preventing air entry between a moving material web and a roll 失效转让
标题翻译：一种用于防止移动幅材和辊之间的空气通路的方法和装置。
公开(公告)号：EP0606874A1
公开(公告)日：1994-07-20
申请号：EP94100259.4
申请日：1994-01-10
申请人： VALMET PAPER MACHINERY INC.
发明人： Paloviita, Petri
IPC分类号： D21H23/30
CPC分类号： D21H23/30
摘要： Investigations have shown that curtailing the entry of air between the coater backing roll (3) and the web (5) being coated can offer a significant reduction in the number of uncoated blotches. By virtue of preventing the occurrence of such coat defects, the rotational speed of the kiss roll (2) in kiss roll coaters can be reduced. The invention is based on pressing the web (5) being coated against the backing roll (3) from the opposite side of the web (5) relative to the backing roll (3) at a point preceding the nip between the kiss roll (2) and the backing roll (3), whereby air is prevented from entering between the web (5) and the backing roll (3). The means employed for pressing the web (5) against the backing roll (3) is an air jet to avoid imposing additional stress on the web.
摘要翻译：研究已经表明并削减空气的涂布支承辊（3）和纸幅之间的入口（5）被涂覆可以提供在未涂覆的斑点的数量的减少显著。凭借防止寻求涂层缺陷的发生的，可以减少在吻辊涂机的辊舔式（2）的旋转速度。本发明是基于上按压所述幅材（5）的在点涂针对来自幅材（5）相对于背衬辊（3）的相反侧的背衬辊（3）preceding-吻辊之间的辊隙（2 ）和支承辊（3），其中空气从幅材（5）和支承辊（3）之间进入防止。用于挤压所述幅材（5）相对于背衬辊（3）中使用的装置是一个空气喷射，以避免在网络上施加额外的应力。

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