Part head centering and empty header

[Johannes Graumann <johannes_graumann@web.de>]

Hello

I have coded my 'Appendix' like so:

\setuphead
  [part] 
  [
    header=empty,
    footer=empty,
    alternative=middle,
    placehead=yes,
    resetnumber=no,
    number=no,
    style={
      \ss\switchtobodyfont[60pt]\setupinterlinespace[line=2.8ex]
    },
    page=right
  ]

\startappendices
\setuppagenumbering[way=bytext,partnumber=no,conversion=numbers,location={header,right}]
\framed
  [%
    height=\textheight,%
    frame=off,%
  ]
  {
    \part{Appendices}
  }
{\stopappendices}

Which gives me a nicely vertically and horizontally centered title. One
problem remains though: I can't get rid of the page number. The
framed  '\setuphead[part]' commands concerning header and footer are being
overruled and I can't figure out how to have an empty header for just the
page containing the frame.

Thanks for any hints,

Joh