Apparatus and method for coating substrates with washcoats

Patent metadata

Field	Value
Publication number	US-2023241596-A1
Application number	US-202318296578-A
Country	US
Kind code	A1
Filing date	Apr 6, 2023
Priority date	Dec 10, 2019
Publication date	Aug 3, 2023
Grant date	—

Abstract

A substrate coating apparatus is disclosed. A substrate coating apparatus comprises: a source of a washcoat; a washcoat showerhead for discharging the washcoat towards an upper surface of a substrate; a conduit fluidly connecting the source of the washcoat to the washcoat showerhead for supplying washcoat to the washcoat showerhead; a headset for engaging the substrate to locate the upper surface of the substrate below the washcoat showerhead; and a vacuum generator for drawing the washcoat discharged from the washcoat showerhead through the substrate. The headset comprises a headset seal for engaging against the substrate. The headset seal comprises a perimetral portion that extends around the headset and a cantilevered portion that extends down from the perimetral portion and which is configured to engage against a sidewall of the substrate.

First claim

1 . A headset seal for engaging against a substrate, the headset seal comprising a perimetral portion for extending around a headset and a cantilevered portion that extends from the perimetral portion and which is configured for engaging against a sidewall of a substrate.

2 . The headset seal according to claim 1 , wherein the cantilevered portion is arc-shaped.

3 . The headset seal according to claim 1 , wherein the cantilevered portion subtends a central angle of between 45 and 120°.

4 . The headset seal according to claim 1 , wherein the cantilevered portion subtends a central angle of between 45 and 90°.

5 . The headset seal according to claim 1 , wherein the cantilevered portion subtends a central angle of between 65 and 75°.

6 . The headset seal according to claim 1 , wherein the cantilevered portion has a depth, in a radial direction, of between 2.5 to 5.0 mm.

7 . The headset seal according to claim 1 , wherein the perimetral portion and the cantilevered portion are formed unitarily.

8 . The headset seal according to claim 1 , wherein the perimetral portion and the cantilevered portion are separate.

9 . The headset seal according to claim 1 , wherein the perimetral portion and the cantilevered portion are formed of different materials.

10 . The headset seal according to claim 1 , wherein the cantilevered portion has a shore hardness of between 35A and 45A.

Assignees

• Johnson Matthey Plc

Inventors

• Burgess Neil
• Hayton Christopher
• Thomson Craig

Classifications

• B01J35/56 Primary

  Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths · CPC title

• B01J37/0215 Primary

  Coating · CPC title

• B05C5/02

  {the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g.} from an outlet device in contact or almost in contact, with the work · CPC title

• B05C7/04

  the liquid or other fluent material flowing or being moved through the work; the work being filled with liquid or other fluent material and emptied · CPC title

• B05D1/26

  performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface · CPC title