“Deepdrawing method”

…for steelpan described by PANArt:

“The deepdrawing is made with a huge press, which is about six meters high and weighs 22 tons.”

http://www.seetobago.org/trinidad/pan/archive/r&d/panart/ir_archivecopy_the_technology_of_a_new_rawform.htm#nav1

Hang® Gubal – Deepdrawing of the Gubal-“Gugel” shown at the movie “Spira Mirabilis:

“The Rolling Method”

2017, Pantheon Steel dedicates their US Patent US8455745 B2 to the public.

“Hydroforming Method”

2016, Colin Foulke makes the method available for the public.