also known as a squeegee roller, removes entrained air between the imaging drum and the print media. Next, a length of donor material (in roll form) is metered out of the material supply assembly or carousel, and cut into sheet form of the required length. The donor material is then transported to the imaging drum and wrapped around the periphery of the imaging drum. The load roller removes any air entrained between the imaging drum, print media, and the donor material. The donor material is now superimposed in the desired registration, with respect to the print media, which has already been mounted onto the imaging drum.
With the donor sheet material and print media secured to the periphery of the imaging drum, the scanning subsystem or write engine, providesDepartment of Agricultural, Food and Nutritional Science at the University of Alberta, Edmonton, Canada.

**Gary Van Domselaar**, PhD (University of Alberta, 2003), is the Chief of the Bioinformatics Laboratory at the National Microbiology Laboratory and Adjunct Professor in the Department of Medical Microbiology at the University of Manitoba, Winnipeg, Canada.
