[Tommy084]

thanks, Kencoupe, and fullraceflathead

for the link and adressing me to the US Patent and Trademark Office.
i found there an 15 page pattent folder where it describes the machine in detail,
and has somevery nice pictures.
Sadly i cannot put the link on this reply.
the patent scheet is from 1936.
so i may say they made them from 1936 until the second world war? (1945)?

thanks a lot for the help