US 11,905,065 B2
Method and apparatus for producing a rolled curl on an open end of metal container
Thomas James Chupak, West Middlesex, PA (US); and Keith Osborne Mitchell, Fredonia, PA (US)
Assigned to Exal Corporation, Youngstown, OH (US)
Filed by Exal Corporation, Youngstown, OH (US)
Filed on Apr. 7, 2017, as Appl. No. 15/482,261.
Claims priority of provisional application 62/320,401, filed on Apr. 8, 2016.
Prior Publication US 2017/0333970 A1, Nov. 23, 2017
Int. Cl. B65D 1/02 (2006.01); B65D 41/40 (2006.01); B21D 51/26 (2006.01); B21D 19/12 (2006.01); B21D 51/10 (2006.01); B21D 51/32 (2006.01)
CPC B65D 1/023 (2013.01) [B65D 41/40 (2013.01); B21D 19/12 (2013.01); B21D 51/10 (2013.01); B21D 51/2623 (2013.01); B21D 51/2661 (2013.01); B21D 51/32 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A method bottle comprising a cylindrical main body; a rounded shoulder disposed between the cylindrical main body and a tapered neck, wherein the tapered neck defines a first diameter where the tapered neck intersects with the rounded shoulder and a second diameter where the tapered neck intersects with a tapered upper end, wherein the first diameter is larger than the second diameter; and wherein the tapered upper end defines an opening and a rolled curl around the opening, wherein the rolled curl receives a crown closing cap and has a leading edge tucked inside of the rolled curl that is in a substantially vertical position, wherein an outside surface of the leading edge engages an outer surface of the tapered upper end of the metal bottle and wherein the rolled curl defines an outer edge having a substantially flat surface wherein an angle between a line lying in a plane of the substantially flat surface and a longitudinal centerline of the metal bottle is about 10°; wherein a portion of the rolled curl defines a curve having a radius of 1.4 mm; and wherein the rolled curl has a height of 4 mm.