Apparatus and method for lining caps

Claim 1

A device for applying a viscous liquid material such as a hot melt adhesive in a preselected pattern such as an annular ring upon a receiving surface including a central area comprising, an elongated member having an open longitudinal bore and including upper and lower ends thereof, a longitudinally directed shaft extending through said bore and adapted for limited relative rotational contact therewith, said shaft including an extension at the lower end thereof, said extension having a lower surface adapted to contact said central area of said receiving surface, said member lower end terminating in an edge outwardly radially offset from said extension and forming a space therebetween, said shaft and said member bore cooperating to define at least one generally closed continuous helical grooved path operatively associated with a supply of said material at its upper end and terminating in at least one open arcuately shaped slot at its lower end, said slot positioned at the top of said space and extending substantially less than the full perimetal extent of such space at the top thereof, and means for effecting said relative rotation so as to force said material along said grooved path and out of said slot in a heaped pile along at least an arcuate portion of said ring pattern.

Claim 2

A device for applying a viscous liquid material such as a hot melt adhesive in a preselected pattern such as an annular ring upon a receiving surface including a central area comprising, an elongated member having an open longitudinal bore and including upper and lower ends thereof, a longitudinally directed shaft extending through said bore and adapted for limited relative rotational contact therewith, said shaft including an extension at the lower end thereof, said extension having a lower surface adapted to contact said central area of said receiving surface, said member lower end terminating in an edge outwardly radially offset from said extension and forming a space therebetween, said shaft and said member bore cooperating to define at least one generally closed continuous helical grooved path operatively associated with a supply of said material at its upper end and terminating in at least one open arcuately shaped slot at its lower end, said slot positioned at the top of said space and extending substantially less than the full perimetal extent of such space at the top thereof, and means for effecting said relative rotation so as to force said material along said grooved path and out of said slot in a heaped pile along at least an arcuate portion of said ring pattern.

Claim 12

The device of claims 1 or 10, said receiving surface being a relatively flat interior surface of an open cap, said device positioned above a rotating feed table for said caps with said member positioned so as to serially project into said caps, said table and said member adapted for periodic relative longitudinal movement towards and away from each other so as to periodically cause said member to contact said surface, and means for activating said rotation means when said member is in contact with said surface.