Patent GB-1165530-A (GB)
Title: Apparatus for Applying Bonding Material to Annular Sealing Surfaces
IPC: H01J5/20
Filed: 1968-08-29
Abstract: 1,165,530. Coating apparatus. OWENSILLINOIS Inc. 29 Aug., 1968 [8 May, 1968], No. 41212/68. Heading B2L. Apparatus for coating an annular edge surface of a hollow article comprises a holder for retaining the article with said surface upwardly-facing and substantially horizontal, means for simultaneously imparting rotational and lateral movements to the holder for progressively presenting a localised area of said surface at a constant velocity to a substantially fixed delivery point of coating material, a container pivotally mounted above and adjacent the delivery point, rotatable screw means for conveying coating material from the container, a delivery head mounted on the discharge end of the screw conveyor and having a bottom orifice, means for positively aligning said orifice with said surface throughout its passage therebeneath, and means for controlling delivery of coating material on to said surface. A holder 16, rotatably mounted on a carriage 17, has a central aperture 22 for receiving the cylindrical neck 12 of a television tube 11 and carries brackets 21 for supporting the corners of tube 11 to maintain the upper edge 10 of the latter horizontal. Carriage 17 is slidably mounted on fixed horizontal bars 18, is secured to the piston rod 20 of a doubleacting air cylinder 19, and carries an endless cam 24 and an endless driving chain 25, both of which are shaped to correspond with the edge 10. A motor 30 drives a vertical shaft carrying a sprocket 27 adapted to co-operate with chain 25, and a follower 31 adapted to co-operate with cam 24. A column 35 pivotally carries at its upper end atank 36 containing viscous solder glass frit which is agitated therein by blades 40 mounted on a rotary shaft 39 driven by a motor 42. Container 36 communicates via a valve 37, controlled by a rod 38, with a horizontal cylinder 45 containing a rotary screw conveyor member 46 driven by a motor 48. Cylinder 45 communicates with a downwardly-directed nozzle (50) provided in a delivery head 47, the passage between cylinder 45 and nozzle (50) being controlled by the piston rod of a double-acting air cylinder 51. A sleeve 53, pivoted on head 47, carries a single-acting air cylinder 54 and a pair of intermeshing pinions 60. The piston rod of cylinder 54 is linked to an arm 56 rigid with one pinion 60, and arms 57, rigid with the respective pinions 60, carry respective rollers 58, whereby, on energisation of cylinder 54, rollers 58 engage tube 11 on opposite sides of edge 10 to align nozzle (50) with the latter. Initially, piston rod 20 is retracted and a tube 11 is then positioned in holder 16. On manual actuation of a switch 70, piston rod 20 advances until cam 24 and chain 25 engage follower 31 and pinion 27 respectively, and a limit switch 72 is actuated, whereby motors 30 and 48 are started, the piston rod of cylinder 51 is raised to establish communication between cylinder 45 and nozzle (50), and the piston rod of cylinder 54 is lowered to engage rollers 58 with tube 11. Coating of edge 10 then proceeds until terminated on completion by a timing device 76.