| 摘要 |
A braking device 1 for braking advancing of the rear portion of a flat sheet when the sheet is advanced and is displaced by being pulled by its front portion: a surface over which the sheet is advanced, a suction hole 10 in the surface which communicates with an exhaust orifice 30 via an air circulation channel 20, a principal compressed air injection device 40 which, by a Venturi effect, indirectly generates a braking suction air flow through the suction hole 10, a secondary compressed air injection device 50 which, by a Venturi effect, indirectly generates a cleaning suction air flow through the suction hole 10. |
