Abstract: An apparatus for use with paper, tissue and like fibrous sheet material rewinding machinery, comprising a booth disposable substantially around the rewinding machinery and having side walls, an intake-end end wall a take-off end opening through which wound rewind bars may be withdrawn, a fixed cover over at least the take-off end, leaving an uncovered top portion at the intake end through which wound reels may be introduced and withdrawn, vent openings in the booth, a moveable cover portion moveable between an inoperative position clear of the intake opening and an operative position in which it forms a closure over the intake opening, means to move the moveable cover between the inoperative and operative positions, and means to induce flow of air from the atmosphere through the vent openings to minimize egress of dust from the booth without substantially disturbing the sheets as they are rewound.