INSTALLATION FOR MANUFACTURING CLOTH FROM BASALT FIBER Russian patent published in 1998 - IPC

FIELD: mineral fibers. SUBSTANCE: installation contains primary fibers' overblow unit, perforated fiber-sedimentation drum with its internal cavity connected to vacuum generator, and diffuser located between the two latter. In side walls of diffuser, through holes are made equidistantly to cylindrical surface of fiber-sedimentation drum and connected, through controlled throttles and filters, with inside surface of drum. Perforation index of the latter, from distance equal to 0.3-0.4 its length and so on, increases linearly by 20-25% from transverse axis of symmetry to both sides. EFFECT: increased uniformity in cloth thickness and uniformity of density along width of cloth. 2 dwg