Rotary atomizer edge guard

摘要

The invention relates to rotary bell cup atomizers used in the coating of substrates; more particularly, the invention provides a protective cover for the outer atomizing edge of such devices during idle periods in the coating process, which cover is retractable to expose the atomizing edge and permit unimpeded conventional coating to proceed upon initiation of coating.

主权项

1. An edge-protecting mechanism for protecting the outer atomizing edge of a rotary bell cup atomizer comprising, in a rotary bell cup atomizing apparatus,
a cylindrical tubular cover incorporated into the housing of said atomizing apparatus and extending axially therein, the inside diameter of said cover being greater than the outside diameter of said bell cup, and means for extending said cover to a forward position forwardly of said edge during non-atomizing idling operation of said atomizer, the cover thereby circumferentially covering the atomizing edge of said atomizer, and means for retracting said cover to a rearward position rearwardly of said edge during atomizing operation of said atomizer, thereby exposing the atomizing edge to the environment, whereby, during atomization said cover is retracted and atomization proceeds conventionally, and during periods of idle from atomization said cover extends forwardly to said position forward of said edge, thereby protecting said atomizing edge from external damaging forces.