  The ionized disc reflection model of Ross & Fabian is applied to a sample of
five Seyfert 1 galaxies observed by BeppoSAX. Good fits were obtained for all
the objects in the sample. NGC 4051 and Mkn 335 (usually classified as NLSy 1s)
show evidence of a highly ionized accretion disc (xi ~ 350 erg cm s^{-1} and xi
\~ 800 erg cm s^{-1}). While NGC 3783 seems to be a ``pure Sy 1'' characterized
by a highly ionized accretion disc (xi ~ 500 erg cm s^{-1}). All the sources
are consistent with having a face-on disc. The accurate determination of the
continuum emission allows us to investigate the spectral variability in the
case of Mkn 509.
