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1. (WO2018177755) DOSING DEVICE FOR DOSING A GRANULAR MATERIAL, SPRAYING DEVICE AND METHOD FOR APPLYING A GRANULAR MATERIAL TO A SUBSTRATE

Pub. No.:    WO/2018/177755    International Application No.:    PCT/EP2018/056458
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Thu Mar 15 00:59:59 CET 2018
IPC: B05B 7/14
G01F 1/00
G02F 1/13
G01F 11/00
B05B 16/00
B05B 1/20
Applicants: MERCK PATENT GMBH
Inventors: VAN DEN HEUVEL, Ronald
Title: DOSING DEVICE FOR DOSING A GRANULAR MATERIAL, SPRAYING DEVICE AND METHOD FOR APPLYING A GRANULAR MATERIAL TO A SUBSTRATE
Abstract:
The invention relates to a dosing device (10) for dosing a granular material (16) comprising a reservoir (12) for storing the granular material (16), a dosing disc (20), anda suction device (24). The dosing disc (20) is rotata- ble around a rotational axis (22). The reservoir (12) has a dosing opening (14) facing the dosing disc (20) and the dosing opening (14) is arranged above the dosing disc (20) such that a dosing gap is formed between a surface of the dosing disc (20) and a surface (26) surrounding the dosing opening (14).The dosing opening (14) isarranged eccentric with respect to the rotational axis (22). The suction device (24) has an opening (25) facing the dosing disc(20), the opening (25) being arranged above the dosing disc (20) and likewise being arranged eccentric with respect to the rotational axis (22). The size of the dosing gap ischosen such that a mon- olayer (18) of the particles (17) of the granular material (16) is dosed from the reservoir (12) through the dosing opening (14) onto the surface of the dosing disc (20). The suction device (24) isconstructed and arranged such that the monolayer (18) of particles (17) is being sucked into the suc- tion device (24) and mixed with a gas stream when the particles (17) are being transported to the suction device (24) by rotation of the dosing disc (20). Further aspects of the invention relate to a spraying device comprising such a dosing device and a method for applying a granular material to a substrate.