Basic Concepts Of Electronic Printing. William J. “Bill” McCalpin EDPP, CDIA, MIT, LIT The Xenos Group (972) 857-0776 Xplor Global Conference Los Angeles, CA 1999. About The Speaker. Mr. McCalpin is Director of Product Management at Xenos Group
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William J. “Bill” McCalpin
EDPP, CDIA, MIT, LIT
The Xenos Group
Xplor Global Conference
Los Angeles, CA 1999
Despite trade and the travels of people like Marco Polo, Europeans never learned the art of xylography (printing from wood carving) from the Chinese. The ability to print in this way was spontaneously learned by the Europeans no earlier than the last quarter of the 14th century.
1430-1450 - After 12 centuries, Europeans finally go beyond the Chinese by making durable components for Metallographic printing:
About 1450, Johannes Gutenberg first associated the idea of using die, matrix, and lead with the invention of the printing press.
The ‘screw press’ was used for the next 350 years with technological improvements allowing such a press to print up to 250 copies an hour.
The 19th century saw the introduction of:
The 20th century introduced many more advance- ments in printing: offset printing, dry offset, color printing, photocomposition, even three dimensional printing.
In 1977 or so, Xerox introduces the 9700, the first cut sheet production printer, and our industry starts to take off!
2. Each 'scan line' is dispatched to the engine.
3. A photoelectric drum which is on a circular belt is charged with a high voltage.
4. A laser is fired through a
piece of glass at a rotating, mirrored polygon.
5. The bits in the scan line cause the piece of glass through which the laser is passing to vibrate.
6. The laser beam hits the drum for each ‘off’ pixel, and discharges that spot on the drum.How A Xerox 9700 Prints
8. Paper is passed over the drum, and the toner now sticks to the paper.
9. The paper, now with toner applied, passes
through a fuser, which is a set of very hot rollers (400°F) which ‘fuse’ the toner to the paper.
10. The paper is post-processed as needed and placed into an output bin.How A Xerox 9700 Prints (cont.)
Or, how what Gutenberg did five centuries still affects you today...
Type - from the Greek word typtein - to beat or strike. Even today, the phrase in Italian for ‘to type’ is battere a macchina, literally, to ‘beat with the machine’.
A letter-sized sheet of paper in the U.S. is 66 picas long.Pica
b x px-height
The default word space for this font is 1/3 an em space.em
10 pitch is 10 characters per inch.Monopitch
the ‘M’ is many times wider than the ‘i’ in a proportional font.Proportional
Baseline - An imaginary line upon which the body of the character sits. All characters on a line of text share the same baseline, even characters in different fonts.
Descender - strokes which go below the baseline (or the body of the character).
b qAscender And Descender
Line skip - Usually, the distance from baseline to baseline. Note, this value is often larger than the font height.
pxbMFont Height And Baseline
SerifSerif And Sans Serif
This text has been left and right justified so the word spaces vary.Leading
Epson MX-80 Xerox UDK (XES)
QMS QUIC IBM PPDS
HP PCL Xerox Metacode
No two shops have exactly the same set of fonts installed!
Symbol ( ZapfDingbats ()
Pat McGrew, EDPP
WED 7:15 AM - 8:15 AM
Stephen Wowelko, EDPP, Diana Hillman, EDPP
WED 12:30 PM - 1:30 PM
THU 10:00 AM - 11:30 AM
WED 11:30 AM - 12:30 PM
David Weinberger and Stephen Poe, EDPP
TUE 1:00 PM - 2:00 PM (right now!)
THU 3:00 PM - 4:00 PM
Bill McCalpin, EDPP, and Bill McDaniel, EDPP
THU 3:00 PM - 4:00 PM
Director of Product Management
3010 LBJ Freeway Suite 1500
Dallas, TX 75234
(972) 857-0776 (voice) (972) 857-0979 (fax)