US 5,296,013 A · Process and apparatus for the continuous production of mineral wool nonwovens

Abstract

A process and apparatus for the continuous production of mineral wool nonwovens in which the objective is to provide a process and an apparatus for the continuous production of mineral wool nonwovens, by means of which a stable flow pattern is created in the chute, thus facilitating a clearly defined, homogeneous layer of deposited mineral wool in which at least one backflow region (24, 25) is generated in the chute (9) outside the fibre flow (23), which backflow region (24, 25) is sufficient for such a large-volume backflow with such a low mean velocity that appreciable upward fibre transport is avoided. In this connection, a portion (32) of the process air entrained with the fibre flow is deflected upward in the backflow, and another portion (34) of the process air is extracted.

Claims6

Dependent claims

A process for continuous production of mineral wool nonwoven fabrics, comprising the steps of:

discharging a generally vertical stream of mineral wool fibers together with process air into a chute;
accumulating the fibers on a nonwoven formation zone of a conveyor beneath the chute;
applying suction with suction means and through the nonwoven formation zone of the conveyor to extract a portion of the process air through the conveyor and adhere the fibers to the conveyor, wherein another portion of the process air is deflected upward from the conveyor;
and
extracting a further portion of the process air via extraction devices located adjacent said conveyor and outside of said nonwoven formation zone.

2 more elements

Dependencies are inferred from the claim text.

Process and apparatus for the continuous production of mineral wool nonwovens

Life of this patent

Process and apparatus for the continuous production of mineral wool nonwovens

Life of this patent

Abstract

Claims6