Back to results
US 4,588,605 AGranted
Method of and arrangement for applying a strip-shaped powder layer on a weld seam of containers, and a container
AssigneeSiegfried Frei
InventorsSiegfried Frei, Ernst Hohl
Life of this patent
Estimating the term…
Abstract
A strip-shaped powder layer is applied onto a weld seam of a container so that powder/gas mixture is supplied into a chamber having a lower pressure than in the surrounding atmosphere, is statically charged there, and partially applied onto the seam.
Claims8
A method of forming and applying a substantially strip-shaped powder layer onto a weld seam of a can body, comprising the steps of:
- supplying a powder composed of powder particles transported by a carrier gas and in the form of a substantially bundled powder jet into a spray chamber of a spray head, wherein said spray chamber is open at a spray opening thereof towards the weld seam and is located opposite the weld seam;
- establishing a pressure in the spray chamber which is lower than the pressure of the surrounding atmosphere to ensure retention of the bundled powder jet entering said spray chamber and to prevent formation of a spray cloud of the powder particles of said bundled powder jet composed of the powder transported by the carrier gas;
- diverting at least part of the powder particles of the bundled powder jet from the spray chamber in the direction of the weld seam;
- and
- depositing said diverted powder particles onto the weld seam in the form of a substantially strip-shaped powder layer.
2 more elements
Dependencies are inferred from the claim text.