Abstract: An apparatus and method is shown to retrofit a printing press to provide for perforations in a paper at the time of printing, which perforations aid the end user in tearing out coupons or redeemable items from the paper. An existing pipe roller is removed and replaced with a perforator assembly and a perforator roller. The assembly has perforator wheels that are adjustable left and right between limits, and can be lowered when perforations are desired. A threaded drive shaft moves the perforator wheels left or right. Cylinders lower the perforator wheels during perforating. Adjustments may be made electronically, as where to set the perforator wheels.