lprng-doc 3.8.A~rc2-3 / usr / share / doc / lprng-doc / LPRng-Reference-Multipart / x6254.htm

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  <title>Duplex Printing</title>
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<body class="SECT1" bgcolor="#FFFFFF" text="#000000" link="#0000FF"
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    <table summary="Header navigation table" width="100%" border=
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      <tr>
        <th colspan="3" align="center">LPRng Reference Manual: 24
        Sep 2004 (For LPRng-3.8.28)</th>
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        <td width="10%" align="left" valign="bottom"><a href=
        "p450.htm" accesskey="P">Prev</a></td>

        <td width="80%" align="center" valign="bottom">Chapter 12.
        Printcap Database</td>

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  <div class="SECT1">
    <h1 class="SECT1"><a name="AEN6254" id="AEN6254">12.21. Duplex
    Printing</a></h1>

    <p>Duplex printing is when you print on both sides of a page.
    Some printers which do duplex printing require that you send
    them special commands to force this mode. This is usually done
    by the FILTERS. The <b class="APPLICATION">ifhp</b> filter
    makes a stab at sending the PJL or PostScript commands to the
    printer. Many people have reported problems doing duplex
    printing, so here is a check list.</p>

    <ol type="1">
      <li>
        <p>Make sure you have enough memory for the worst case
        print job. Usually the printer has to rasterize both pages
        before it can produce an impression. It may require much
        more memory than you expect.</p>
      </li>

      <li>
        <p>Check your printer manual to discover the EXACT form of
        the <tt class="LITERAL">enter duplex mode</tt> command and
        make sure that either the command is part of the job (PJL
        language at the start of the job, postscript header, etc),
        or that the filter generates the correct form.</p>

        <p>Note there is a PostScript Printer Description file
        (PPD) for most printers that support PostScript, and they
        even have the PJL and PostScript code for this in the PPD
        file.</p>
      </li>

      <li>
        <p>It has been observed that even with what would
        apparently be sufficient memory, that many duplex jobs
        print 'oddly', that they are not aligned on the same side
        in the same way, etc etc. This may not be the fault of the
        software, but of the support for duplex operation.</p>
      </li>

      <li>
        <p>Read the <b class="APPLICATION">ifhp</b> documentation,
        and create a configuration section in the <tt class=
        "FILENAME">ifhp.conf</tt> file for your printer.</p>
      </li>
    </ol>

    <p>I know this is painful, but until there is a uniform way to
    get the correct commands extracted from either PPD or some
    other database then this appears to be the only way to do it.
    <a name="AEN6272" id="AEN6272"></a></p>

    <blockquote class="BLOCKQUOTE">
      <p><span class="emphasis"><i class="EMPHASIS">Patrick
      Powell</i></span></p>
    </blockquote>
  </div>

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        "x6275.htm" accesskey="N">Next</a></td>
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        <td width="33%" align="left" valign="top">Tektronix Phaser
        Printers</td>

        <td width="34%" align="center" valign="top"><a href=
        "printcapref.htm" accesskey="U">Up</a></td>

        <td width="33%" align="right" valign="top">Solaris,
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