| 摘要 |
<p>Treatment apparatus has up-stream rollers 2 and down-stream rollers 3. Between the rollers are provided a pair of upper and lower treatment zone plates 4,5, spaced by a gap 6 through which sheet material to be treated can be passed. The plates have grooves 9 occupied by strips defining up- and down-stream even slots 14,15 for flow of treatment liquid into the gap 6. The ends of the upper plate 4 are smoothly rounded at 37. When sheet material is fed into the gap flow occurs on top of the sheet and up over the rounded edge of the plate. Thence it flows sideways off the top of the plate without flowing over the top of the upper rollers.</p> |
