US 11,654,425 B2
Method of coating a substrate with a washcoat
Neil Burgess, Royston (GB); Christopher Hayton, Royston (GB); and Craig Thomson, Royston (GB)
Assigned to Johnson Matthey Public Limited Company, London (GB)
Filed by Johnson Matthey Public Limited Company, London (GB)
Filed on Dec. 7, 2020, as Appl. No. 17/247,292.
Claims priority of application No. 19215031 (EP), filed on Dec. 10, 2019.
Prior Publication US 2021/0170386 A1, Jun. 10, 2021
Int. Cl. B01J 37/02 (2006.01); B05D 1/26 (2006.01); B05D 7/22 (2006.01); B05D 3/04 (2006.01); B05C 5/02 (2006.01); B05C 7/04 (2006.01)
CPC B01J 37/0215 (2013.01) [B05C 5/02 (2013.01); B05C 7/04 (2013.01); B05D 1/26 (2013.01); B05D 3/0493 (2013.01); B05D 7/22 (2013.01); B05D 2259/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of coating a substrate with a washcoat, wherein the method comprises the steps of:
engaging the substrate with a headset of a substrate coating apparatus so as to locate an upper surface of the substrate below a washcoat showerhead of the substrate coating apparatus;
discharging a washcoat out of the washcoat showerhead towards the upper surface of the substrate;
drawing the washcoat through the substrate by applying a suction force to a lower surface of the substrate,
wherein the step of engaging the substrate with the headset comprises engaging a headset seal of the headset with the substrate, the headset seal comprising a perimetral portion extending around the headset and a cantilevered portion extending down from the perimetral portion which engages against a sidewall of the substrate.