TRIMPAK CORPORATION, Plaintiff-Appellant, v. SCHENECTADY LUMBER COMPANY, Inc., Defendant-Appellee (IROQUOIS MILLWORK CORPORATION, Defendant-Intervener); SAME v. Henry B. RUTLAND, Defendant-Appellee (IROQUOIS MILLWORK CORPORATION, Defendant-Intervener); SAME v. Calvin H. ATWATER, Defendant-Appellee (IROQUOIS MILLWORK CORPORATION, Defendant-Intervener)