Print Controller Design Guide for Information Security
Page 47 of 86
2-2 Printer
2-2-1 Overview of Printer Operations
• The Printer function can be divided into main processes: 1) Converting the printer language data
received by the MFP/LP into image data, and 2) Printing out this image data onto the paper in
accordance with the specified job settings. The former is performed by the printer language processing
subsystem, while the latter is performed by the printing subsystem.
• Once the data sent from the host computer is accepted, and the processing subsystem begins
processing the new print job, a print job log entry is created (temporary entry). The entry is registered
as soon as the job is completed.
2-2-2 Data Flow
Printing Unencrypted Image Data
• As stated above, the printer language-encoded data sent from the host computer is interpreted by the
language processing subsystem, after which it is converted into image data and then stored
temporarily in the Page Memory in binary bitmap format. Once this is done, the data is compressed in
Ricoh original compression format, and stored in the HDD page by page. If the MFP/LP does not have
an HDD, the compressed data remains in the Page Memory and is treated the same as data written to
the HDD.
• When Spooling is enabled, the incoming data is stored directly to the spooling area of the HDD.
Following this, the data is sent to the language processing subsystem, where it is interpreted and
converted to image data page by page. Before it is printed out, the spooled data can be deleted from
the “Spool Printing” list in WebImageMonitor, or “Spooling Job” list on the MFP/LP operation panel.
The data is developed page by page in the order in which it was converted (beginning from page 1),
however the actual printing order of the pages may differ depending on the job settings received from
the printer driver (e.g. duplex vs. simplex, usage of Booklet or Stapling features, etc.).
• When Image Spooling in enabled, all pages of the incoming data are converted to image data and then
stored to the HDD. Once this is completed for all pages, the data is then sent to the printing engine for
printing out.
Note: The order in which jobs are printed out is same whether Image Spooling is enabled or disabled.
Note: The Document Server and all related Printer functions described below are supported by MFP
models only.
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