US 12,220,903 B2
Apparatus for coating a surface with particles
Sasy Azar, Mazkeret Batya (IL); Benzion Landa, Nes Ziona (IL); and Yosef Shachak, Kfar Saba (IL)
Assigned to Landa Labs (2012) LTD., Rehovot (IL)
Filed by LANDA LABS (2012) LTD., Rehovot (IL)
Filed on Sep. 8, 2022, as Appl. No. 17/910,078.
Application 17/910,078 is a continuation in part of application No. PCT/IB2021/052774, filed on Apr. 2, 2021.
Claims priority of application No. 2005159 (GB), filed on Apr. 7, 2020; and application No. 2020722 (GB), filed on Dec. 30, 2020.
Prior Publication US 2023/0356521 A1, Nov. 9, 2023
Int. Cl. B41F 13/22 (2006.01); B05B 1/26 (2006.01); B05B 7/14 (2006.01); B05B 14/10 (2018.01); B05C 5/02 (2006.01); B05C 11/02 (2006.01); B05C 19/00 (2006.01); B05C 19/04 (2006.01); B41F 13/193 (2006.01); B41M 5/03 (2006.01); G01N 15/075 (2024.01)
CPC B41F 13/22 (2013.01) [B05B 1/265 (2013.01); B05B 7/1486 (2013.01); B05B 14/10 (2018.02); B05C 5/0245 (2013.01); B05C 11/025 (2013.01); B05C 19/008 (2013.01); B05C 19/04 (2013.01); B41F 13/193 (2013.01); B41M 5/03 (2013.01); G01N 15/075 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A coating apparatus for applying a layer of particles to a receiving surface, the apparatus comprising:
a) an application chamber partially bounded by the receiving surface, the application chamber being surrounded by a bell housing defining a suction chamber for preventing particles from escaping into the ambient atmosphere;
b) a source of pressurized air in fluid coupling with the application chamber;
c) an air return path forming fluid communication between the application chamber and an intake of the air source, the return path forming a portion of an air circulation loop;
d) a dosing device coupled to a supply of particles to be coated onto the receiving surface and capable of controllably introducing measured amounts of the particles into the air circulation loop, and
e) a controller electrically coupled to the dosing device and controlling the dosing device to dynamically maintain the particle concentration in the application chamber within predetermined limits.