Line Gluing | Edge
Gluing | Spot Gluing
Line gluing is the most common method of attaching
the parts together on a unit set. Usually two lines of glue are applied to the
stubs between each part as the parts are being collated together. Two glue lines
are required on carbon interleaved forms: one to hold the parts together and
another to hold the carbon to the paper.
Unit sets can also be manufactured without the stub to bind
the sets together. The parts can be attached to each other by being glued along
one of the edges with a fugitive glue that allows the parts to be easily torn
apart. Edge gluing can be applied as the individual parts are put together on
a collating machine or they can be edge glued in an offline process. It is usually
the preference of the manufacturer as to what process is used. The edge gluing
of a unit set can be less expensive at times, but it will depend on the process
used, the quantity of forms, and the size of the form. Edge gluing a form will
not necessarily have any affect on the price of the form. It eliminates having
to discard the stub, but when pulling apart an edge glued form, the glued edge
may not lay smooth and flat. You must consider all of these factors when deciding
on whether or not to use edge gluing on your carbonless unit sets.
Note: Edge gluing
is available on carbonless forms only!
Spot gluing is the same as line gluing except that it goes
on the form as intermittent spots of glue. This method of gluing is used if
the customer would like to remove parts easily from one another without detaching
the stub perforations. It is also used to hold two parts together after the
stubs have been removed.
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