Packaging can and method and apparatus for its manufacture
AssigneeCrown Packaging Technology, Inc.
InventorsNicholas James Caunter, Tanya Ruth Gledhill, Ian Maxwell, Maurice Riviere
Life of this patent
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Abstract
A can for packaging food, comprising a metal can body and a diaphragm lid (16) formed of lidding material which comprises a multilayer structure with at least an aluminum layer of from 6 to 90 microns thickness and a bond layer for fixing the lid (16) directly to the can body. One method for forming the can forms the lidding material by using an outwardly extending curl (20) at one end of the metal can body as the draw die. Lidding material which is carried by the body maker punch is drawn around the curl of the can body draw die so as to form the lidding material into a cup shape.
Claims21
A can for packaging food, the can comprising
- a metal can body having a sidewall that includes a vertically extending portion and an angled portion that extends from an upper end of the vertically extending portion, the angled portion being inclined upwards and outwards with respect to a can body center axis at an angle from 20° to about 60°, such that the angled portion defines a sealing surface, the vertically extending portion and the angled portion of the sidewall being a unitary one-piece structure;
- and
- a lid sealed to the can body on the sealing surface;
- wherein the lid is formed of lidding material that is peelable in whole from the can body and comprises a multilayer structure with at least an aluminum layer having about 6 to about 90 microns thickness and a bond layer.
A can for packaging food, the can comprising:
- a metal can body having a vertically extending sidewall, the sidewall including an upper end that is inclined at an angle that is both upwards and outwards with respect to a can body center axis at an angle from 20° to about 60°, the upper end defining a sealing surface, the vertically extending sidewall including the upper end being a unitary one-piece structure;
- and
- a lid sealed to the can body on the sealing surface;
- wherein the lid is formed of lidding material that is peelable in whole from the can body and comprises a multilayer structure.
Dependencies are inferred from the claim text.