Six pairs of glass drops on a spot plate; a pair closer than merge runs together into one piece of glass.
SVGReact
Fig 7Spot plateSlide across to open the fanmerge 20 px · 3 of 6 joined
Joined: one piece of glass, R30 + R22The neck, where a pair runs togetherThe merge bladeA spot plate with six channels, each holding a pair of glass drops at gaps from 4 to 44 px. Each pair is drawn from one distance field, so a pair closer than merge runs together into one piece of glass. The fan sets merge: each feeler blade stops at its own gap. At 20 px the 4, 10 and 16 px pairs have joined, so three blades are out.