| 摘要 |
A screen printing machine has a conveyor which is preferably an endless conveyor belt (2) for conveying a material (3) to be printed, the conveyor being drivable over a printing table in a manner such that the belt (2) can be stopped in a first position for registering the material (3), e.g. by front stops 8, 9 and side lays 6, 7, whilst pressurised air is applied beneath the material, and then driven to convey the material (3) to a printing position (3'). Subsequently to the material (3) being registered in the first position the friction between the material (3) and the conveyor is increased by subjecting the undersurface of the material (3) to a negative pressure which is maintained during the conveyance of the material to the printing position (3'). The printing table is conveniently divided into sections of limited longitudinal and lateral extent. Means can then be provided for controlling those sections at which the negative pressure is created during transportation of the material (3) so that only in those sections on which the material sits is a negative pressure created. <IMAGE> |
