FISCHBEIN PBC-6000, Руководство оператора

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FISCHBEIN
®
Co. MODEL PBC-6000™
OPERATOR’S MANUAL
REV. D 2005-03 57
9.2 TYPICAL BAG CLOSURES
PROPER CLOSURES
A properly closed PBC bag prevents the
sifting or leakage of products from its sealed
ends. There are specific characteristics of
properly closed bags. Properly closed bags
have a strong complete seal along the entire
length of the bag. After a bag has been sealed
by the PBC 6000 and allowed to cool, try
pulling the seal apart from the outside of the
bag. As the flap is torn away, the adhesive
should contain fibers of the bag material from
the opposite piece. Glue should be found on
both sides of the seal. Another way of testing
the seal is to take a sealed bag that has cooled
and cut the top 6 inches (153mm) bag top off.
Begin pulling apart the seal from the inside of
the bag. Check for unsealed areas within the
gussets and along the entire length of the bag.
Be certain to check for full contact between
the two surfaces of the bag. A seal with
many large wrinkles may provide an avenue
for product to leak from the bag.
The appearance of the bag is important to the
end consumer. The PBC 6000 is fully
capable of making a strong and attractive
seal. The appearance of a seal becomes more
important for bags that display artwork on the outside. The seal should be relatively straight and
even. Some cresting can be expected at the gussets due to the changing thickness in the bag. If a
flap has been sealed at an angle straight across the bag, adjustments should be made to correct the
problem.
PROBLEM CLOSURES
An incorrect closure compromises the integrity of the seal. If a closure is not complete due to a
wrinkled or angled seal, the adhesive strip has not made full contact with the bag surface. Below is
a description of the common types of problem closures that may occur and how to solve them.
A.
The diagram in
Illustration 8.32, A
represents a proper bag seal. Some cresting will occur
near the gussets and small wrinkles will be present as a result of the creaser. The seal does
make full contact along the bag when pulled apart and inspected.
B.
This diagram shows that the flap has not been completely compressed. The adhesive was
likely heated to the correct temperature, but the compression rollers must force the melted
glue into the fibers of the bag material on both sides of the seal. The wrinkles are present,
but are not pressed flat to the bag surface. (
Sections 8.5.2-3, pages 30 and 37
)
Illustration 8.32