Canon pixma 3620. Paper pulled in crooked resulting in paper jam/tearing. After going through all cleaning maintenance and manually cleaning it was still happening. Upon inspection I noticed a small spring attatched to a white piece of plastic that was getting caught on the paper, causing the tear and no-feed problem.. I detached the spring and pushed gently until it popped off.. Miraculously the paper instantly fed through and have not had the problem since.