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"Cold-set"
presses are generally in the 17-inch wide
range. This of course varies as large newspaper
presses today are also mostly "cold-set."
These "baby webs" have been used mainly
by the business forms printer to print forms
that in most cases contained very little
printing. This is why many forms printers
were called "converters" as they tend to
"convert" the forms. Today the fastest dying
print market is the forms market. This is
due to the laser since today many business
forms are generated on a laser. Take, for
example, a hotel receipt. In years past
the hotel generated a two or three part
carbonless (no carbon required) form. Today
many hotels generate one or two laser copies
instead. Restaurants are doing the same.
The customer used to receive a two part
form, if paying by credit card, which was
known in the forms industry as a "guest
check." Today the consumer receives a laser
receipt or a non-printed carbonless or thermal
form.
The digital market (Xeikon, Indigo, etc.)
is also impacting the forms market today
as these presses can print 4-color as well
as variable information. The Internet is
also impacting the forms market with on-line
forms and on-line consumer buying. So what
are the forms printers doing about all this
you ask? Well, they are now moving into
the "Direct Mail Market" as well as printing
commercial work. At one time the print markets
were segregated by commercial, forms, etc.
The lines are becoming blurred today as
forms printers print commercial and commercial
printers add low end forms. The big forms
manufacturers such as Standard Register
or Moore are moving in other directions
thus subcontracting low volume forms to
smaller forms printers.
Cold
set press today instead of printing the
traditional business form is now printing
higher volume direct mail such as advertisements,
coupons, etc. One might think direct mail
is dead due to the rise of the Internet,
however, the market is on an increase. Even
Internet on-line companies such as Amazon.com
use the printed direct mail market to advertise!
The two medias can work together! The coldset
press manufactures today are even gearing
their small webs to compete against sheetfed.
Their motto; "Why print 12,000 impressions
per hour when you can print 40,000?" It
is because of this shift that the smaller
press are being equipped with press consoles,
IR or UV driers, better registration systems,
etc.

So how does the cold-set press differ from
the larger heatset version? Cold-set web
implies that the ink is not dried by heat
but by absorption and/or oxidation. Cold-set
web presses are smaller presses and generally
used for business forms printing. Press
sizes from 11" to 25" is common. While many
of the functions of the cold-set press are
similar to that of the Heatset web, they
usually are not as complicated. As they
do not need heat, no oven is needed. Small
forms press also do not usually contain
a folder section. They will, however, include
a sheeter and can run roll-to-sheet or roll-to-roll
(for future processing). The following is
a breakdown of the smaller cold-set press:
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Unwind
stand - The unwind sections are
smaller and in most cases do not have
automatic splicing sections. Generally,
a roll is run until its completion.
The press is stopped and the spent roll
taken off. A new roll is then placed
on the unwind stand an manually spliced
into the remaining web and the press
restarted.
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Web
Tensioner - Very similar to that
of the Heatset web press except that
the unit is usually smaller. The same
function applies - to control the in-feeding
of the web.
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Turn Bars - Many small forms
presses utilize 뱓urn bars?which
turn the web over. Many presses are
confi gured with 5 printing units. The
printer will print one color on the
back of the web, then turn the web over
and print the remaining 4 colors on
the front. If a printer was printing
a newsletter (both sides) he would print,
depending upon his confi guration, one
or two colors on the back, turn the
sheet over and then print the other
colors on the top.
Turn
bars are metal bars laid horizontally
at a 45 degree angle from the web direction
of the press. There are generally two
bars. Most turn bars have small air
holes so the a cushion of air assists
in "gliding" the web over the bars.
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Printing
Units - While the printing units
are similar to that of the Heatset press,
most small cold-set presses utilize
a blanket to impression system printing
only one side. Like sheetfed presses,
the impression cylinder can be adjusted
to provide maximum printing performance.
All other aspects of the printing unit,
are similar to that of the larger Heatset
press. Many direct mail presses will
use blanket-to-blanket systems and be
slightly wider.
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Perforating, cutting, punching, etc.
- Most forms type presses have units
following printing that will imprint
numbers, MICR codes, punch holes, perforate
the web, etc.. Imprinting units are
small, usually rubber plates used for
printing fixed information on a form.
Frequently, each of the offset units
prints the same information on the paper
web and the imprinter designates the
receiver of each part of the form, such
as Receiving, Purchasing, Manufacturing
and Sales.
Next
the web may be printed by a numbering
unit, with regular Arabic numbers if
the forms are to be consecutively numbered,
or with special MICR or OCR numbers.
There are two types of numbering heads;
fl at heads for numbering across the
web, parallel to the horizontal perforations
on continuous forms or at right angles
to the stub for unit sets; and barrel,
or convex, heads, used for numbering
parallel to the web travel.
The printed web can then be punched.
Punched holes are used in both continuous
and unit sets to control registration
from part to part on the forms collator.
Marginal punches for continuous forms
have been standardized by the industry
so that forms can be run on any type
of equipment regardless of the equipment
maker.
In
addition to marginal punching, forms
may also be punched for fi le, loose-leaf,
or register machine holes. These differ
in their punching requirements, both
in the hole size and spacing, so several
different punching heads are needed.
Marginal punching is a precision operation;
the holes must be in perfect alignment
along both edges, with a tolerance of
only plus or minus 1/4 of 1%. Punch
units must match the plate cylinder
size in order to maintain register with
holes exactly 1/2" apart. This is known
as "throw length."
Perforating the web follows punching.
There are both vertical and horizontal
perforators. Vertical perforations are
put in with wheels mounted on shafts.
Their purpose is to provide easy removal
of the line hole punching on continuous
forms or on the stub punches of unit
sets. The tear strength of this perforation
is determined by the number of slots
per inch. The greater the number of
slots on the wheel, the more ties will
be left on the form and the stronger
the perforation will be.
Horizontal,
or cross, perforations are made by perforating
blades mounted in slots on a cylinder.
This cylinder has the same circumference
as the plate cylinder and has several
slots in order to accommodate a choice
of form lengths. This type of perforating
is very demanding and depends on the
weight and strength of the paper, stresses
encountered on the press and collator,
and the method used to break the forms
apart. Like vertical perforating, the
tear strength of the perforation is
determined by the number of cuts per
inch and the depth of the cuts. The
fewer cuts per inch, the stronger the
perforation and the deeper the cuts.

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Scratch-Off
ink, used mostly in direct mail
printing, is usually applied just following
the printing and prior to perforating,
punching, etc. Scratch-off inks are
usually gold or silver. They are applied
to hide a piece of printed information.
The consumer "scratches off" the ink
with a coin or finger nail to reveal
the printed information. Scratch-offs
are usually used for lottery tickets,
sweepstakes, etc.
Many
direct mail and forms presses use interchangeable
printing cylinders to accommodate different
printed sheets lengths (cutoff). Many direct
mail presses, which are very similar to
a forms press, with perforating, punching,
etc., will be heat-set for greater speed.
This presses tend to be in the 17-28" wide
range.
Typical
Business Form presses which ran print roll-to-toll
or roll-to-sheet

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