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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:
-
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.
-
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.
-
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.
-
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.

-
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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