Patent ID: 8602326
Filing Date: 2013-12-10
Classification: B05B

Abstract:
1. A spray coating device, comprising: a bell cup having a parabolic flow surface defined by a variable angle relative to a central axis of the bell cup, wherein the variable angle progressively changes in a downstream direction along the central axis, wherein the parabolic flow surface comprises a plurality of stepwise surfaces having variably changing angles with respect to the central axis of the bell cup, and each stepwise surface is less than 10 percent of a distance between a central opening and an outer edge of the bell cup; and a flip edge between the parabolic flow surface and the outer edge of the bell cup, wherein the flip edge has an angle discontinuous from the parabolic flow surface, and the parabolic flow surface is at least 90 percent of a flow path from the central opening to the outer edge of the bell cup.