Spray coating articles

Claim 1

A MECHANISM FOR SPRAY COATING ELONGATE TUBULAR OPEN END ARTICLES TO LEAVE A WELL-DEFINED MARGINAL PORTION AT ONE END UNCOATED, COMPRISING A SUPPORT FOR HOLDING AN ARTICLE WITH THE MARGINAL PORTION TO REMAIN UNCOATED UPPERMOST, A SPRAY NOZZLE HAVING A PREDETERMINED SPRAY PATTERN INSERTABLE INTO SAID ARTICLE FOR THE SPRAYING OPERATION, MEANS FOR EFFECTING RELATIVE AXIAL MOVEMENT BETWEEN SAID NOZZLE AND SAID ARTICLE SUPPORT SO AS TO POSITION SAID NOZZLE WITHIN THE ARTICLE AND WITHDRAW THE SAME THEREFROM IN EACH CASE TRAVERSING SAID MARIGNAL PORTION,. AND ALSO SO AS TO SPREAD THE COATING MATERIAL TO SAID THE ARTICLE WALL, MEANS FOR FEEDING COATING MATERIAL TO SAID NOZZLE, MEANS FOR CONTROLLING THE FLOW OF COATING MATERIAL TO SAID NOZZLE, AND MEANS FOR SO COORDINATING SAID MOVEMENT EFFECTING MEANS AND SAID FLOW CONTROLLING MEANS AS TO CAUSE FLOW OF COATING MATERIAL FROM SAID NOZZLE DURING THE SPREADING MOVEMENTS THEREOF BUT ONLY WHILE THE NOZZLE AND ARTICLE ARE AT RELATIVE POSITION SUCH THAT THE SPRAY PATTERN OF THE NOZZLE IS ENTIRELY BELOW THE MARGINAL PORTION OF THE ARTICLE, SAID COORDINATING MEANS ALSO INCLUDING MEANS FOR STARTING AND STOPPING THE FLOW OF COATING MATERIAL ONLY AT TIMES WHEN THE SPRAY PATTERN IS REMOTE FROM SAID MARGINAL PORTION.