US 11,708,647 B2
Apparatus for making melt-blown multilayer nonwoven
Raphael Hermes, Niederkassel (DE); and Markus Wuescht, Rheinbach (DE)
Assigned to PARAT BETEILIGUNGS GMBH, Neureichenau (DE)
Filed by Raphael Hermes, Niederkassel (DE); and Markus Wuescht, Rheinbach (DE)
Filed on Mar. 2, 2021, as Appl. No. 17/189,341.
Claims priority of application No. 102020106532.9 (DE), filed on Mar. 10, 2020.
Prior Publication US 2021/0285129 A1, Sep. 16, 2021
Int. Cl. D01D 4/02 (2006.01); D04H 1/56 (2006.01); D01D 5/08 (2006.01)
CPC D01D 4/025 (2013.01) [D01D 5/08 (2013.01); D04H 1/56 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An apparatus for making nonwoven, the apparatus comprising:
a mesh-belt system having an upstream endless section and a downstream endless section aligned therewith in a horizontal direction;
respective upstream and downstream spinnerets spaced apart in the direction above the upstream and downstream sections of the mesh-belt system, having downwardly opening tips at respective vertical spacings above the respective sections of the mesh-belt system, and each emitting fibers that are deposited at locations on the respective sections of the mesh-belt system directly below the spinnerets to form on the respective sections respective nonwoven layers;
a support carrying the mesh-belt system;
means for moving the support and thereby orienting the mesh-belt system into a position forming an acute angle with respect to horizontal and thereby varying the spacings; and
upstream and downstream drive means respectively connected to the upstream and downstream sections for independently moving same in or against the direction.
 
9. An apparatus for making a multilayer nonwoven, the apparatus comprising:
a base;
a support carried by the base;
an endless belt system supported on and movable with the support and having an upper reach extending generally horizontally;
a drive for advancing the belt system such that the upper reach moves in a machine direction;
upstream and downstream spinnerets fixed above the base, separated in the direction by a gap, having downwardly open tips spaced apart in the direction at vertically fixed positions at respective spacings above respective deposition locations on the belt system, and emitting melt-blown fibers that drop from the tips onto the respective deposition locations to form respective layers;
a pivot supporting the support and belt system on the base for pivoting about a horizontal axis transverse to the direction;
a guide on the base only allowing the pivot to move vertically; and
actuators for raising and lowering the pivot on the base and for pivoting the support on the base about the axis to vary the spacings.