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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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