Instead of patting DS on the back to burp in the middle of his bottle i put him on my shoulder and tickle his sides...he squirms so much he wiggles the burp out and it wakes him up for the rest of his bottle
I used to do something like that with DD. I would cup her chin and then use my other hand to tickler her back. Starting near the lower middle of her back gently pinch (lightly) while quickly going up the spine to her neck. It would make her arch her back and kinda sit up. Generally it was good for a burp if she was in an alert mood.
Re: burping: the tickle technique