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diff --git a/FS/FS/bill_batch.pm b/FS/FS/bill_batch.pm
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+package FS::bill_batch;
+
+use strict;
+use vars qw( @ISA $me $DEBUG );
+use FS::Record qw( qsearch qsearchs dbh );
+use FS::cust_bill_batch;
+
+@ISA = qw( FS::Record );
+$me = '[ FS::bill_batch ]';
+$DEBUG=0;
+
+sub table { 'bill_batch' }
+
+sub nohistory_fields { 'pdf' }
+
+=head1 NAME
+
+FS::bill_batch - Object methods for bill_batch records
+
+=head1 SYNOPSIS
+
+  use FS::bill_batch;
+
+  $open_batch = FS::bill_batch->get_open_batch;
+  
+  my $pdf = $open_batch->print_pdf;
+  
+  $error = $open_batch->close;
+  
+=head1 DESCRIPTION
+
+An FS::bill_batch object represents a batch of invoices.  FS::bill_batch 
+inherits from FS::Record.  The following fields are currently supported:
+
+=over 4
+
+=item batchnum - primary key
+
+=item status - either 'O' (open) or 'R' (resolved/closed).
+
+=item pdf - blob field for temporarily storing the invoice as a PDF.
+
+=back
+
+=head1 METHODS
+
+=over 4
+
+=item print_pdf
+
+Typeset the entire batch as a PDF file.  Returns the PDF as a string.
+
+=cut
+
+sub print_pdf {
+  eval 'use CAM::PDF';
+  warn "Failed to load CAM::PDF: '$@'\n" if $@;
+
+  my $self = shift;
+  my $job = shift;
+  $job->update_statustext(0) if $job;
+  my @invoices = sort { $a->invnum <=> $b->invnum }
+                 qsearch('cust_bill_batch', { batchnum => $self->batchnum });
+  return "No invoices in batch ".$self->batchnum.'.' if !@invoices;
+
+  my $pdf_out;
+  my $num = 0;
+  foreach my $invoice (@invoices) {
+    my $part = $invoice->cust_bill->print_pdf({$invoice->options});
+    die 'Failed creating PDF from invoice '.$invoice->invnum.'\n' if !$part;
+
+    if($pdf_out) {
+      $pdf_out->appendPDF(CAM::PDF->new($part));
+    }
+    else {
+      $pdf_out = CAM::PDF->new($part);
+    }
+    if($job) {
+      # update progressbar
+      $num++;
+      my $error = $job->update_statustext(int(100 * $num/scalar(@invoices)));
+      die $error if $error;
+    }
+  }
+
+  return $pdf_out->toPDF;
+}
+
+=item close
+
+Set the status of the batch to 'R' (resolved).
+
+=cut
+
+sub close {
+  my $self = shift;
+  $self->status('R');
+  return $self->replace;
+}
+
+=back
+
+=head1 CLASS METHODS
+
+=item get_open_batch
+
+Returns the currently open batch.  There should only be one at a time.
+
+=cut
+
+sub get_open_batch {
+  my $class = shift;
+  my $batch = qsearchs('bill_batch', { status => 'O' });
+  return $batch if $batch;
+  $batch = FS::bill_batch->new({status => 'O'});
+  my $error = $batch->insert;
+  die $error if $error;
+  return $batch;
+}
+
+use Storable 'thaw';
+use Data::Dumper;
+use MIME::Base64;
+
+sub process_print_pdf {
+  my $job = shift;
+  my $param = thaw(decode_base64(shift));
+  warn Dumper($param) if $DEBUG;
+  die "no batchnum specified!\n" if ! exists($param->{batchnum});
+  my $batch = FS::bill_batch->by_key($param->{batchnum});
+  die "batch '$param->{batchnum}' not found!\n" if !$batch;
+
+  my $pdf = $batch->print_pdf($job);
+  $batch->pdf($pdf);
+  my $error = $batch->replace;
+  die $error if $error;
+}
+
+
+=back
+
+=head1 BUGS
+
+=head1 SEE ALSO
+
+L<FS::Record>, schema.html from the base documentation.
+
+=cut
+
+1;
+