초록 ▼

A dryer section in a papermaking machine has two reversing rolls to form a pocket between each pair of dryers in a dryer tier. The first reversing roll is a vacuum roll and the second reversing roll is a grooved roll. A blow box is disposed between the two rolls, the blow box provides suction for th

A dryer section in a papermaking machine has two reversing rolls to form a pocket between each pair of dryers in a dryer tier. The first reversing roll is a vacuum roll and the second reversing roll is a grooved roll. A blow box is disposed between the two rolls, the blow box provides suction for the grooved roll and provides vacuum which restrains a web on the dryer fabric as it travels between the first and the second rolls. The blow box also provides a supply of make-up air which extends in a cross machine direction along the pocket formed by the two reversing rolls. The blow box also supports a pivoting foil which is positioned against the dryer fabric as it moves from a first dryer, towards the first reversing roll. The foil defines a region of low pressure which restrains the web as it travels between the first dryer and the first reversing roll.

대표청구항 ▼

[ We claim:] [5.] A dryer section in a papermaking machine comprising:a first dryer roll;a second dryer roll spaced from the first dryer roll in a machine direction;a paper web which traverses the first and second dryer rolls;a dryer fabric overlying the paper web as it traverses the first and secon

[ We claim:] [5.] A dryer section in a papermaking machine comprising:a first dryer roll;a second dryer roll spaced from the first dryer roll in a machine direction;a paper web which traverses the first and second dryer rolls;a dryer fabric overlying the paper web as it traverses the first and second dryer rolls;a vacuum roll positioned between the first dryer roll and the second dryer roll;a grooved roll positioned between the vacuum roll and the second dryer roll;a pocket between the first and second dryer rolls, the pocket defined between the vacuum roll, the grooved roll and a portion of the web and the dryer fabric which extends from the first dryer roll to the vacuum roll to the grooved roll to the second dryer roll; anda blow box positioned between the vacuum roll and the grooved roll, the blow box supplying vacuum to at least a portion of the dryer fabric which forms the pocket, and supplying vacuum to the grooved roll, the blow box further supplying make-up air to the pocket, to limit the cross machine direction air flows.