Piper, which said it experienced at least a 45-percent decline in sales across the board, is preparing for another round of downsizing this month. At press time the company had not determined how many of its 1,200 workers will be let go. The company had to close for two weeks in the aftermath of September 11 and also dismissed more than 250 workers. “This doesn’t mean the company is not making the kind of investments to secure its future. We are going to continue to invest solidly in training, product development and customer support.”