National Can Corporation

Robert W George

Kenneth Rapey

Casper W Miller

A method and apparatus for molding and curing liners in cap closures includes a molding head having a plurality of molding stations, a feeding mechanism for feeding unlined caps with charges of lined material to the molding head and a take-off mechanism for removing the completed liner. The feeding mechanism consists of a dispensing unit which is capable of dispensing more than one-thousand charges of material per minute and includes a gun having a lining compound receiving chamber with a needle reciprocated therein. The needle is normally biased to a closed position and is electrically moved to an open position through a solenoid and a photosensing mechanism which accurately senses the position of a rotating wheel of the feeding mechanism.

Apparatus for applying liners to closures

Method of lining closures

A new tamper-proof closure includes a cap having a plurality of circumferentially spaced slits separated by bridges with a plurality of lines of weakness extending perpendicular to the slits and aligned with the respective bridges. The lines of weakness have a residual thickness which varies between opposite ends.

Tamper-proof closure

A new tamper-proof closure and apparatus for forming such tamper-proof closures is disclosed herein. The closure includes a cap having a plurality of circumferentially spaced slits separated by bridges with a plurality of lines of weakness extending perpendicular to the slits and aligned with the respective bridges. The lines of weakness have a residual thickness which varies between opposite ends. The apparatus includes a cutting and scoring tool having a first elongated member that defines a cutting edge which has spaced V-shaped recesses and a second member having an elongated surface extending across each of the recesses with the elongated surface having a plurality of projections that extend perpendicular to the cutting edge and are centrally spaced with respect to the V-shaped recesses.

Growing community of inventors

Naperville, IL, United States of America

Robert W George