inner wall and an outer wall and is positioned within said aperture such that the outer wall of the barrel is in close proximity with said aperture the flange comprises an inner surface which abuts the seat surface the filter plate assembly further comprises a filter cloth assembly comprising a filter cloth having an aperture and a grommet fitted within the filter cloth aperture the grommet is configured to align with the adapter ring and comprises a collar having an inner surface which is bonded or mechanically attached to a first side of the filter cloth a second side of the filter cloth abuts a sealing surface of the adapter ring application_number US 201314398159 A description as shown in fig3 a first filter plate assembly 1 is provided first filter plate assembly 1 comprises a first filter plate 100 defined by a base portion 104 having standoffs 120 peripheral walls 130 and a shelf portion 108 the shelf portion 108 is generally composed of a seat surface 101 a recess 102 a tapered surface 103 and a feed eye aperture 110 chamfers 112 surround the feed eye aperture 110 and a plurality of bores 106 are provided within the shelf portion 108 the first filter plate assembly.