XV Engineering (The name of our Capstone Group -- derived from our group number [15]) was contracted to design a machine for the preparation of allergy patch tests by the John Elliott Professional Corporation (JEPC). The machine is to prepare 4×10 cell low-density polyethylene (LDPE) patches. Allergens are supplied in 5 mL syringes, and must be applied to separate cells of the patch in quantities of 30-45 μL and avoid cross-contamination. The goal is to reduce the time required by the nurse in patch test preparation to a maximum of four minutes per patch, on average. The geometry of the patch requires that the machine prepare patches in multiple steps, filling each cell in a logical fashion.

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