Sweetheart Cup Company Inc.

Daniel E Hammett

Derek S Matheson

Ronald A Durgin

Delvin K Border

Romano Balordi

David W Norwood

Robert Brown

Donald C Lundgren

Carlton L Kemmet

Wesley R Bush

Onisim Krasnokutsky

Carton L Kemmet

Carlton L Kennet

A method is described for continuously producing a smooth, high gloss coating on a paper container comprising the steps of applying a substantially uniform coating of melted wax material to the outside surface of the container or sheet stock, maintaining the temperature of the wax coating above its melting point and above its congealing temperature, imparting a constant surface velocity to the outside surface of the container or sheet stock and applying a substantially uniform film of liquid coolant, particularly water, to the outside surface of the container or sheet stock whereby the surface velocity of the coolant is substantially equal to the surface velocity of the container or sheet stock.

High gloss paper cup

Single ply paperboard containers are wax-coated by directing a relatively narrow spray band of atomized wax towards the interior surfaces of the containers being treated. The spray band is volumetrically asymmetrical and is oriented relative to the interior surfaces of the container such that its volumetric asymmetry is directed towards the bottom circumferential seam between the tubular side wall and bottom wall of the containers. In this manner, a minimal (but fluid-impervious effective) nonsaturating amount of wax will be applied to the interior surfaces of the container so as to preserve the vivid appearance of color graphics and/or indicia that may be printed on the exterior surface of the container. At the same time, the volumetric asymmetry and orientation of the spray band ensures that a maximum amount of wax will be applied at or near the circumferential bottom seam so that a fluid-impervious fillet seal may be established thereat. The appearance of the color graphics and/or indicia may optionally be further improved by the electrostatic spray application of a suitable lacquer. The applied lacquer, when dried, will thereby enhance the 'glossy' exterior appearance of the interior wax-coated containers.

Wax-coated paperboard containers

Method for producing high gloss cup

Growing community of inventors

Brodbacks, PA, United States of America

Daniel E Hammett