COEUR d'ALENE – Bob Palm would like to keep that used printer cartridge out of the landfill, and make a few bucks, too. The goals are twin pursuits of Palm's business, Rapid Refill Ink. Five days a week, Palm stops at the company's 30-plus drop boxes in North Idaho, where people drop off used cartridges from their printers, copiers and fax machines. Within 48 hours, they're refilled with ink and ready for pickup.