Word doc printing a verical line at end of each line?

[gud98]

I have a document which is printing a vertical line out at the end of each line where there is data (such as text, underline etc etc). They appear on the far right of the document near the margin.

Where there is no data such as a return then there is no line

It is not there on print preview but is when printed. It only happens on one specific printer. If I print on another it's not there.

Anyone know what it is?

Thanks