Paper Static

[rsands]

We have had a few different digital machines over the year and now have a C8000. The problem has always been there...static! The sheets come out of the press on 170 gloss stocks stuck together after half hour. We then try to feed them into duplo booklet makers and the fanning isn't able to seperate them. Any tips on getting this out of the paper so they dont stick to one another? Or any ideas what causes that to happen?

 

[arossetti]

Where are you located? If you are in an arid climate you may want to think about adding some humidity into your environment. May also want to look at this product: Anti-Static Solutions for Printing Equipment

 

[lfelton]

We have had a few different digital machines over the year and now have a C8000. The problem has always been there...static! The sheets come out of the press on 170 gloss stocks stuck together after half hour. We then try to feed them into duplo booklet makers and the fanning isn't able to seperate them. Any tips on getting this out of the paper so they dont stick to one another? Or any ideas what causes that to happen?

Interesting! We've noticed that sheets off of our c8000 have much more static than sheets off of our 6501s. KM have no clue why. As you are having the same issue, it may be that the c8000 has a general issue with adding static to sheets. We've had a specialist industrial "anti static" company in to give us advice, but there doesn't seem to be any practical way of resolving the problem as we print 90%+ of our work to the high capacity stacker dollies.

Anyone figured out any workable solutions or got any constructive feedback from KM?

 

[arossetti]

That is odd considering the c8000 has a humidifier post fuser. You would think static would be less noticeable on the 8000 vs any other equipment.

 

[Possumgal]

Some people have had results keeping a fan blowing in front of the input trays. Enough air gets in to keep a little airflow and helps keep the paper separated. We just tried it on a rather large booklet job, coated stock, Xerox 700. Only one booklet had a double sheet; smoothest job we've done.

 

[CathieH]

Copper threads also help reduce static. Although our reps say they aren't allowed to put them in the paper trays, we can purchase them and put them in ourselves.

We also spray Static Guard while fanning the paper.

 

[lfelton]

That is odd considering the c8000 has a humidifier post fuser. You would think static would be less noticeable on the 8000 vs any other equipment.

The humidified is optional. We have it installed on our c8000 and what you may not be aware of is that it is only for use on uncoated paper, i.e. the gloss paper that has static issues is not affected by the humidifier.

 

[lfelton]

Some people have had results keeping a fan blowing in front of the input trays. Enough air gets in to keep a little airflow and helps keep the paper separated. We just tried it on a rather large booklet job, coated stock, Xerox 700. Only one booklet had a double sheet; smoothest job we've done.

Thanks for the suggestion, but if I understand you right, you're talking about feed issues while printing. The c8000 sounds like a different kettle of fish to the 700. It has air separation and vacuum tape feed on all trays, so feeding has never been an issue. The problems occur when the printed stock is fed through any finishing equipment, we get sheets stuck together pretty well, much more so than on our 6501s.

 

[rsands]

whats strange is we ran a load of booklet jobs this week and it double fed once. It seems if we take it straight from the printers to the booklet makers and finish it straight away the problem isnt as bad.....but that means immediately having to work schedules in the litho and digital finishing to get it through.

Is it worth looking at the humidifier devices to keep the moisture in the air around the C8000?

 

[nhprinter]

We use an air compressor. There's just enough water in the air to get rid of the static.

Jog the sheets up as best you can and then just blow some air in between the sheets from the side. Works great.

 

[rsands]

I went with air compressor blowing hard on the sheets in the collators....worked a treat. does anyone know of a retro fit system that can fan the edge of the sheets? ideally something like the blowers on a large press