PACK EXPO’s annual event PACK gives BACK, returns to PACK EXPO International (Oct. 23-26; McCormick Place, Chicago) bigger and better than ever! For the first time in its Chicago history, the event will be a musical performance, with headlining band STYX taking center stage at McCormick Place, according to show producer PMMI, The Association for Packaging and Processing Technologies. Rockwell Automation returns as title sponsor and proceeds will benefit the PMMI Foundation.