公开(公告)号：US3783071A

公开(公告)日：1974-01-01

申请号：US3783071D

申请日：1972-01-07

Applicant: ALUMINUM CO OF AMERICA

Inventor： MONKS F

IPC: B05D1/28 ,  B05D5/08 ,  B65D65/42 ,  B05C1/16 ,  B29D23/10

CPC classification number: B65D65/42 ,  B05D1/28 ,  B05D7/52 ,  Y10T156/1026 ,  Y10T156/1036 ,  Y10T156/1052 ,  Y10T156/1087 ,  Y10T428/266 ,  Y10T428/31522

Abstract: A method of manufacturing a package which comprises; coating substantially all of one surface of a metal web or foil or sheet thickness with a homogenous coating of a heat sealable thermoplastic material having a lubricant constituent; applying said coating material in uniform thickness to at least one first elongated zone of metal web; simultaneously applying the coating material in a uniform thickness greater that the coating thickness in the first elongated zone disposed adjacent opposed transverse sides of the first zone; applying the coating by means of a gravure roll; providing a coating thickness in the second zone of about 0.75 to 4.0 lb./ream and providing a coating thickness in the first zone of about 0.30 to 2.0 lb./ream; and forming a package employing said coated metal web as a body component by heat sealing at least a portion of said second zone to a portion of said metal web or to another package component. A coated container body comprising a metal web provided with such two level coating; a first elongated zone of uniform coating thickness spaced inwardly for opposed transverse edges of the metal web; a second elongated zone of uniform coating thickness positioned intermediate each transverse edge of the metal web and the first elongated zone; the first zone having a width substantially greater than the second zone; and said metal web having at least one said second zone heat sealed to another portion of said metal web or to a separate package component to form said container body.