Inside stripe by intermittent exterior spray guns
AssigneeContinental Can Company, Inc.
InventorsLarry V. Cernauskas, Harry B. Foss
Life of this patent
Estimating the term…
Abstract
Methods and apparatus for coating the interior side seam of can bodies. The can bodies proceed down a line in serial order with end toward end and uniformly spaced from each other down the line extending from a can body side seaming machine. An airless spray coating is shot into each can body from the front and the rear to leave a coating of plastic along the interior side seam of a soldered can body.
Claims16
A method of coating the inside of can bodies comprising the steps of:
- axially moving a series of can bodies through a can body side seaming machine, with the length of side seam of each can body being parallel to the direction of can body motion,
- spacing each of said can bodies in said series axially apart from its preceeding and succeeding can bodies, continuing the axial travel of the can bodies,
- placing at least one spray nozzle at a point exterior to the space through which said can bodies axially travel so that said nozzle is not touched by the can bodies as they pass said nozzle,
- aligning said spray nozzle so that the spray material sprayed from said nozzle falls onto the interior surface of each axially moving can body one at a time, and
- intermittently spraying coating material from said spray nozzle through the space between said cans and into each said can interior as said cans pass along said can line causing the coating material to form a protective layer on the interior of said can body seam.
A method of striping the inside of a can body seam as it passes from a can body side seaming machine comprising the steps of:
- axially moving a series of can bodies from a can body side welding machine with the length of the side seam of each can body in the direction of can body movement,
- axially spacing each of said can bodies in said series a distance apart, continuing the axial travel of the can bodies,
- allowing said can body to cool as it leaves the seaming machine,
- spraying coating material from nozzle means at a fixed external position only through the space between successive axially moving can bodies and onto the interior of one of said can bodies to produce a can body having interior coating with the spraying being done at such time as the side seam temperature of said can body is at an optimum temperature for hardening the applied coating material.
A method of striping the inside of a can body seam as it passes from a can body side seaming machine comprising the steps of;
- axially moving a series of can bodies from a can body forming and side seaming machine with the length of the heated side seam of each can body being parallel to the direction of the can body movement,
- axially spacing each of said can bodies in said series a distance apart, allowing each can body of said series of can bodies to cool as it progresses from said side seaming machine, continuing the axial travel of the can bodies,
- spraying a first coating material from a first fixed external position only through the space between axially moving can bodies and onto the interior of a first can body when said can side seam temperature is at an optimum temperature for hardening said side seam coating to form a protective coating for said interior side seam, and
- spraying a second coating material having a lower temperature for hardening than said first coating material from a second fixed external position only through the space between can bodies to deposit on the interior of said first can body when said side seam temperature is at an optimum temperature for curing said second side seam coating to form a protective coating on the interior of said can body.
Dependencies are inferred from the claim text.