| 摘要 |
A screen off contact arrangement in which a rectangular screen holding frame [11] is adapted to secure the screen [13] on its two side rails [17,18]. Four off contact devices at the corners of the frame [11] allow adjustment of the off contact distance between the screen and the pallet. A scaled knob [33] enables incremental movement of the shaft [29] to move it relative to the fixed front and rear rails [15,16]. Each shaft [29] is secured to the ends of the side rails [17,18] so that incremental movement of the knob [33] results in movement of the screen [13]. The advantage is a simple repeatable manual adjustment.
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