Patent ID: 6907908

Claim:
A hopper apparatus for applying joint compound to corner beads, comprising: a hopper having an open upper end, a lower end, and an interior for holding a quantity of joint compound; a feeder apparatus secured across the lower end of the hopper, the feeder apparatus comprising a channel having opposite ends; a series of elongate feeder inserts for selectively securing in the channel to extend between the ends of the channel for feeding a selected corner bead along the channel, the feeder inserts comprising a first set of outside inserts each having a generally V-shaped indented groove extending along their length for guiding an outside corner bead through the feeder apparatus with the concave face of the corner bead facing the joint compound in the hopper, and a second set of inside inserts each having a generally V-shaped ridge extending along their length with an apex facing the joint compound in the hopper for guiding an inside corner bead through the feeder with the convex face of the corner bead facing the joint compound in the hopper, the feeder inserts in each set having grooves and ridges of different angles and corner shapes matching those of a plurality of different inside and outside corner beads; and at least one fastener device for releasably securing a selected feeder insert in the channel.