Apparatus for coating the inside of a cylindrical member

Claim 1

A spray coater for spray coating the interior of a substantially horizontal axis rotating cylinder without mechanical contact with the interior thereof comprising a stationary support fixedly mounted adjacent the location of one end of such cylinder, a hollow spray lance having an end projectible into said cylinder from said one end of the cylinder to adjacent the other end of the cylinder while free of contact with the interior of said cylinder and said lance having a laterally directed nozzle thereon adjacent its said projectible end and means for receiving a supply of a substance to be sprayed adjacent its other end for flow through said lance and out through said nozzle, a lance carrier fixedly positioned on said support in operation comprising a pair of guide wheels on axes in parallel planes spaced longitudinally of said lance from one another and directly engaging said lance both on the same side thereof for supporting and positively positioning said lance on a predetermined longitudinal alignment when the lance is held against said wheels while permitting it to move longitudinally of itself along such cylinder axis while the cylinder is rotating and means opposed to and bearing against the opposite side of the lance from said wheels holding said lance against said wheels.