Printing paper large area flattening device

Application (patent) No. CN200520023767.2 Filing date: 2005.04.04 Name: A large-area flattening device for printing papers (publication) No.: CN2773678 Date of publication (announcement): 2006.04.19 Main classification number: G01N21/956 ( 2006.01) Division I original application number: Classification code: G01N21/956(2006.01)I;G01N21/84(2006.01)I;G01N21/17(2006.01)I;G01N21/64(2006.01)I Certificate date: Priority: Application (patent) Person: China Banknote Printing and Coinage Corporation Address: 100044 No. 143, Xizhimenwai Avenue, Xicheng District, Beijing Invention (design) Person: Zhu Min; Zhang Dianbin; Hu Zhenyu; Jiang Lilin International Application: International Publication: Date of Entry into the Country: Patent Agency: Shijiazhuang New Century Patent & Trademark Office Co., Ltd. Agent: Dong Jinguo Abstract The utility model relates to a large bank note flattening device for a securities offset printing printing quality detector, which has a negative pressure cabin. Suction plate, a uniform pressure plate with vent holes on the suction plate, and a flat plate arranged on the pressure plate, and the upper end of the flat plate A suction hole is evenly provided, and a negative pressure chamber is arranged at the lower end of the flat plate. The suction hole communicates with the negative pressure chamber. The negative pressure chamber on the flat plate passes through the vent hole on the pressure plate and the negative pressure on the suction plate. The chambers are connected and the negative pressure cabin on the suction plate communicates with the fan through the suction holes. The utility model is applied to the RMB offset printing quality detection instrument, and the utility model is very simple, adopts the pneumatic negative pressure flattening method, and has a large exhibition surface. , notes adsorption and removal speed and so on. Sovereignty item 1. A large-area flattening device for printing paper, characterized in that it comprises a suction plate (5) with a negative pressure chamber (6), a ventilation hole provided on the suction plate (5) ( 4) The pressure plate (3) and the flat plate (1) provided on the pressure plate (3), and the upper end of the flat plate (1) is evenly provided with a suction hole (2), and the lower end of the flat plate (1) is set. There is a negative pressure chamber (9), the suction hole (2) and the negative pressure chamber (9) communicate with each other, and the negative pressure chamber (9) on the flat plate (1) passes through the air hole (4) on the pressure plate (3). It communicates with the negative pressure chamber (6) on the suction plate (5). The negative pressure chamber (6) on the suction plate (5) communicates with the fan through the suction hole (8).