However, the Plexiglas doors interfered with routine maintenance. The Plexiglas enclosure required Borden mechanics to reach over the top of the enclosure by use of a ladder. A bypass switch was therefore installed, approximately one month after the Plexiglas enclosure was added to the machine. The bypass switch allowed mechanics to insert a key and turn the switch to "maintenance mode," providing access to the moving parts of the labeler.
Although the bypass switch was intended to provide maintenance personnel access to the machine, the evidentiary material presented suggests that the switch was also for the purpose of allowing operators easy access to the machine while in operation. This was necessary because the operators had continuous problems with excess glue accumulating between the machine's moving parts. The glue hadlabeling department. However, six weeks prior to her accident, Vicky Melencoff, the trained Alfa Labeler operator, instructed plaintiff for approximately an hour and half on how to insert labels into the machine, and remove excess glue from the machine's wheels and bands. When demonstrating the process, Melencoff showed plaintiff how to open the Plexiglas doors to adjust the labels, and clean the wheels with a rag. The machine continued to run when Melencoff opened the doors.
Approximately four weeks later, plaintiff was requested to operate the Alfa Labeler. On that occasion, Calvin Ireland, another regular Alfa Labeler operator, showed plaintiff the basic operation for an hour before her shift. Ireland explained that an operator was required to load the labels, inform maintenance of jams, and clean the machine of