Bates said on Yorkshire Radio: "We have four more players we want to sign and we are on with them as we speak.
"We had a very ambitious signing programme in place, but because the League dragged their feet they signed for other clubs.
"We've signed a few this week though and I have to say the players were fantastic over the summer.
"They trained without pay, some of them could have gone elsewhere, but they wanted to play here."