[R-390] Re: Shipping R-390s

[Barry Hauser]

Todd wrote:
<snipped>
 Also best to use fiberglass
> reinforced shipping tape, not the cheap clear plastic tape and be generous
with the
> tape when sealing the cardboard boxes.  73 Todd Roberts WD4NGG.

Yes 'n no.  There's filament tape and there's filament tape.  The original
kind which comes in 1 to 1.5 inch widths with the threads running lengthwise
can cause problems.  That type should be run at right angles to the seams
only while the clear stuff should run along all the seams -- up the middle
and the edges.

The burst strength ratings of the cartons usually assume all seams are
taped.  One problem -- the lengthwise filament tape can come loose at the
end, then it has a tendency to form a "tail" that can get caught in the
conveyor equipment. UPS doesn't like it -- but in addition to causing them
some inconvenience, that tail is strong enough to get the package flung off
the conveyor if it catches on something.  Yes, it's a long shot, but
Murphy's Law postulates that -- if in the rare event that should happen --
it will be on a hair pin turn on the 30 ft. high conveyor.

Solution -- first use some of that filament tape at 90 degrees to each
seam -- two pieces on each flap and two or three pieces across the middle
seam -- top and bottom.  Then, do the usual with clear tape -- but get the
heavier clear tape.  In addition, cover the filament tape with clear,
overlapping and extending well beyond it to prevent any "tails" from
developing.  The clear tape generally has better adhesion and doesn't tend
to catch.

There is a relatively new kind of plastic tape that is similar to the clear,
2 inches wide, but has filament running in both directions -- lengthwise and
crosswise.  This is a good alternative and can be used by itself.  That gets
applied along the seams.

Another extra step that adds strength to the package -- glue the flaps down
with a bit of hot melt glue -- not too much or there will be a heck of a
time getting it opened.  In addition to keeping the box closed it also forms
a more solid top and bottom and the carton is more resistant to twisting.

Some UPS centers will refuse a carton with exposed lengthwise-filament
reinforced tape.  In addition, it is not suitable for running along seams.
As with plain plastic tape, once it splits up the middle at one point,
that's it.

My 2 cents.

Barry