Cooper Cos. has rescheduled its annual meeting...

Cooper Cos. has rescheduled its annual meeting of shareholders for July 18 from the previously scheduled July 6. The record date for the new meting is June 20 . . . Pan Am will not sign a confidentiality pact with Minneapolis-based NWA Inc. but still is considering making a bid for the parent company of Northwest Airlines, a Pan Am spokesman said . . . Olson Industries in Sherman Oaks said its Dolco Packaging Corp. subsidiary, which makes plastic packages used by fast-food chains and other firms, filed in Los Angeles for protection from creditors under Chapter 11 of the U.S. Bankruptcy Code.