An employee was operating a continuous vulcanizing line, which extrudes rubber jacketing around a conductor cable and uses an indent printing process to label the cable. The indent printer housing had a steel cap on the side; the employee had just tightened this cap into place and was making adjustments on a panel when steam pressure ejected the cap into his abdomen. The cap knocked the wind out of him and he suffered first- and second-degree burns from the steam. He was hospitalized.