Digital BW, The Print

A couple questions about roller marks...

1.  How do I know if a "band" on the paper is from a roller?  
- i have a band on one side of the paper, about half an inch wide and 
20% from the edge, that looks like the paper is compressed and maybe 
there is some ink there than can be rubbed off with some brisk rubbing 
from a t-shirt.  if there is a print on the paper (the example above 
was when the paper was rolled through the printer without printing) 
there appears to be a scuff type mark within that same half inch band, 
most noticably in the darker tones. 

2.  Is that fixed by this? http://inksupply.info/index.php?
_a=knowledgebase&_j=questiondetails&_i=75&nav=+%26gt%3B+%3Ca+href%3D%
27index.php%3F_a%3Dknowledgebase%26_j%3Dsubcat%26_i%3D1%27%3ETips%
2C+Tricks%2C+and+Terms%3C%2Fa%3E

3.  Will pinning the roller up harm the ability of the printer to feed 
certain types of paper?  

4.  Is it better to clean the roller rather than pin them up as 
described in #2?  If so, is there an article with instructions on 
cleaning the roller(s)?  

Thanks,

Brian
http://www.brianchapmanphotography.com