Apparatus for applying bonding material to annular sealing surfaces

Claim 2

In an apparatus for applying a uniform coating of extrudable bonding material to to a nonsymmetrical annular sealing edge surface of a hollow article such as a rectangular funnel member of a color TV picture tube envelope an the like, the combination comprising: a table; rotatable article support means mounted on said table adapted to retain said article with its sealing edge surface in substantially horizontal upwardly facing relation; means for simultaneously moving said article support means rotationally and laterally to rotate the article and progressively present a localized area of said sealing edge surface at constant velocity to a substantially fixed point of delivery of said bonding material; a container for retaining said extrudable bonding material mounted in pivotal relation above and adjacent said point of delivery of said bonding material; a screw extruder connected to the lower extremity of said container extending to said point of delivery of said bonding material; means for rotating the screw member of said screw extruder; a delivery head having a bottom orifice mounted on the discharge end of said screw extruder; means for positively aligning the delivery head orifice with said sealing edge surface throughout its constant velocity passage therebeneath during rotation of said article; and timing means for controlling the delivery of said bonding material onto said sealing edge surface.

Claim 3

The combination set forth in claim 1, including valve means operated by said timing means for positively controlling the delivery of said extrudable bonding material from the bottom orifice of said delivery head.

Claim 4

The combination set forth in claim 1, wherein said means for rotating said article support means and said substantially fixed point of delivery of said bonding material are in substantially vertical alignment.

Claim 5

The combination set forth in claim 1, wherein the axis of said screw extruder and the radius of the supported article to the be coated intersect substantially at a right angle and at the fixed point of delivery of said bonding material.

Claim 6

The combination set forth in claim 1, wherein said means for positively aligning the delivery head orifice with said sealing edge surface comprises a pair of juxtaposed freely rotatable rollers mounted in spring-biased pivoted relation on said delivery head adapted to contact opposing surfaces of the sealing edge sidewall for precise coaxial alignment of said sealing surface and delivery orifice throughout rotation of the article.

Claim 7

The combination set forth in claim 1, wherein said means for rotating the screw member of said screw extruder comprises a constant-speed electric motor.

Claim 8

The combination set forth in claim 1, wherein: said rotatable article support means comprises a rotary article holder having an endless cam mounted therearound, said cam having a contour similar to said article-sealing surface; a rotary cam follower and driving gear adapted to contact and Engage said endless cam and the complemental periphery of said holder respectively in vertical alignment with said fixed point of delivery of said bonding material; pneumatic means for moving said holder laterally and am maintaining the same against said cam follower and driving gear; and motor means for rotating said driving gear to rotate said article holder at constant velocity for uniform delivery of said extrudable bonding material from said delivery head onto said coaxially aligned sealing surface.

Claim 9

In an apparatus for applying a uniform coating of extrudable bonding material in an endless path on an annular sealing edge surface of a hollow article, the combination comprising: a table; a rotatable article holder mounted in slidable relation on said table adapted to retain said article to be coated with its sealing edge surface in substantially horizontal upwardly facing relation; pneumatic means for laterally moving said article holder to bring a localized area of the sealing surface of a supported article to a substantially fixed point of delve delivery of said bonding material; means for rotating the article holder to progressively present a localize area of the sealing surface to said fixed point of delivery of said bonding material; a container for retaining said extrudable material mounted in pivotal relation above and adjacent said point of delivery of said bonding material; a screw extruder connected to the lower extremity of said container extending to said point of delivery of said bonding material, the axis of said screw extruder intersecting the article radius substantially at a right angle at said fixed point of delivery; means for rotating the feed screw member of said screw extruder; a delivery head having a bottom orifice mounted on the discharge end of said screw extruder; follower means mounted on said delivery head adapted to contact juxtaposed surfaces of the sealing edge sidewall closely adjacent said fixed point of delivery of said bonding material to positively align the delivery head orifice and the sealing edge surface of the article to be coated; and timing means adapted to control the delivery of said bonding material onto said sealing edge surface.

Claim 10

In an apparatus for applying a uniform coating of extrudable bonding material in an endless path on an annular sealing edge surface of a hollow article, the combination comprising: a table; a rotatable article holder mounted in slidable relation on said table adapted to retain said article to be coated with its sealing edge surface in substantially horizontal upwardly facing relation; pneumatic means for laterally moving said article holder to bring a localized area of the sealing surface of a supported article to a substantially fixed point of delve delivery of said bonding material; means for rotating the article holder to progressively present a localize area of the sealing surface to said fixed point of delivery of said bonding material; a container for retaining said extrudable material mounted in pivotal relation above and adjacent said point of delivery of said bonding material; a screw extruder connected to the lower extremity of said container extending to said point of delivery of said bonding material, the axis of said screw extruder intersecting the article radius substantially at a right angle at said fixed point of delivery; means for rotating the feed screw member of said screw extruder; a delivery head having a bottom orifice mounted on the discharge end of said screw extruder; follower means mounted on said delivery head adapted to contact juxtaposed surfaces of the sealing edge sidewall closely adjacent said fixed point of delivery of said bonding material to positively align the delivery head orifice and the sealing edge surface of the article to be coated; and timing means adapted to control the delivery of said bonding material onto said sealing edge surface.

Claim 11

The combination set forth in claim 8, wherein; said pneumatic means for laterally moving said article holder comprises an air piston motor; said means for rotating said article holder comprises a driving gear adapted to engage a driving chain mounted around said article holder in a contour complemental to said annular sealing edge, and an electric motor adapted to drive said driving gear.

Claim 12

The combination set forth in claim 8, wherein: said means for rotating the feed screw member of said screw extruder comprises a constant-speed electric motor; said follower means mounted on said delivery head comprises a pair of juxtaposed rollers mounted in pivotal spring-biased relation adapted to contact opposite surfaces of the sealing edge sidewall; and valve means mounted within the bottom orifice of said delivery head operable by said timing means to control the delivery of said bonding material onto said sealing edge.