Abstract: Substantially uniform heat transfer through the cylindrical heat transfer wall of a steam heated hollow dryer drum is attained by longitudinal spoiler bars effecting turbulence of condensate throughout a major extent of the inner surface of the heat transfer wall, and condensate turbulence is generated in a narrow annular area from which a stationary siphon intake head withdraws the condensate from the steam chamber. A turbulence promoter is carried by the intake head and may comprise rigid or yieldably supported structure, e.g. a brush, rigid or flexible bar structure, an array of fingers, mounted on the downstream or off-running side of the intake head having regard to the direction of rotation of the drum.

Abstract: An improved spoiler bar, for rotatable, steam heated cylindrical dryers, which comprises an assembly of magnets, non-magnetic flux conducting backing and base plates, and magnetic flux conducting rails constructed to position the magnets in spaced adjacency to the dryer drum whereby the installation of the assemblies is facilitated and their strength of adherence to the inner surface of the dryer drum is optimized.

Abstract: A means and method for attaining desired temperature conditions at not only the major extent of the heat transfer surface of a rotary heat transfer roll but also at the edges of the roll. Temperature conditioning fluid is introduced and distributed in part directly into a first end of an annular passage between an inner and an outer roll shell and in part into the annular passage adjacently downstream relative to the first end. Spent conditioning fluid is evacuated from the second end of the passage in part directly from the second end of the annular passage and in part through the inner shell adjacently upstream relative to the second end. While the roll is continuously rotating, the relative temperature conditioning effect of the conditioning fluid is adapted to be selectively controlled in respect to either or both ends of the temperature fluid circulating annular passage in the roll.

Abstract: A steam heated dryer drum for use in a papermaking machine with the drum including a cylindrical rotary hollow drum shell and a structure for removing condensate from the steam from the shell including a conduit leading from inside to outside the shell and an improved structure for receiving the condensate with a siphon tip having a hollow chamber within and an opening facing the inner surface of the dryer shell and closely spaced thereto and a flange at the lead end of the siphon tip with an inclined ram surface and a wall across the center of the chamber in engagement with the inner surface of the shell.

Abstract: A steam heated dryer drum for use in a papermaking machine with the drum including a cylindrical rotary hollow drum shell and a structure for removing condensate formed from the steam within the shell including a conduit leading from inside to outside the shell and an improved shoe structure connected to the conduit extending axially along the inner surface of the drum with a leading and a trailing angled face and end walls resting on spacers to lift the leading face and form a condensate receiving gap and a chamber within the elongate shoe for receiving condensate passing under the edge of the faces.