Title:
塗工装置ならびに塗工方法
Document Type and Number:
Japanese Patent JP4495273
Kind Code:
B2
Abstract:
At the assembly (10) to apply a liquid or paste coating (18) to the surface of a moving web of paper or cardboard, using a spray curtain applicator (16), a system (30,34) to register the air back pressure determines the pressure of built-up air in front of the strike line (T) of the coating curtain (20) in the direction (L) of web (12a) travel. A control (32) sets the suction power of the air suction unit (24) according to the air back pressure recorded by the measurement system (30,34). The air pressure monitor gives a direct reading of the air back pressure with at least one sensor (30), located in front of the coating curtain (20) strike line (T) in the direction (L) of web (12a) travel. The monitor also has at least one sensor (34) to register the speed of travel by the web surface (12a). The coating medium (18) has a solid content of 5-50% and pref. 30-75%. It contains at least one inorganic or organic pigment and at least one synthetic or natural bonding agent. It is applied in a coating with a weight of 2-40 g/m<2> and pref. 3-30 g/m<2>. The speed of web surface (12a) travel is ≥ 600 m/min. and pref. ≥ 1000 m/min. The web (12) width to be coated is ≥ 2.5 m and pref. ≥ 4.0 m. A scraper bar (36) is in front of the coating strike line (T), in the direction (L) of web travel, to detach any air (26) carried by the moving web surface (12a). In a direct coating application, a unit (38) stabilizes the web (12) movement, such as by a further suction unit (38) which applies an underpressure to the side of the web (12) opposite the coating applicator (16), to draw the web (12) against a support and pref. a support roller (14). An Independent claim is included for a web coating process, where a suction unit (24) extracts air (26) carried by the moving web surface (12a) in front of the coating curtain strike line (T). The suction power of the air extractor (24) is set according to the air back pressure sensor (30) readings. Preferred Features: The sensor (30) gives a direct reading of the air back pressure at the moving web surface (12a) in front of the coating curtain strike line (T). The web (12) movement speed is indirectly registered by a sensor (34).
Inventors:
Martin Custerman
Application Number:
JP18793299A
Publication Date:
June 30, 2010
Filing Date:
July 01, 1999
Export Citation:
Assignee:
Voith Sulzer Papiertechnik Patent GmbH
International Classes:
B05C5/00; B05D1/30; B05C9/10; B05C11/00; B05D7/00; D21H23/48
Domestic Patent References:
| JP10277458A | ||||
| JP5245426A | ||||
| JP8108119A | ||||
| JP10165869A | ||||
| JP6039333A | ||||
| JP62289264A | ||||
| JP3123657A | ||||
| JP4000962U | ||||
| JP4330959A | ||||
| JP9141170A | ||||
| JP6246215A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Toshiomi Yamazaki
Takuya Kuno