The most common reason is a wavy leading edge of the image. Ensure the leading edge is cut straight and at 90 degrees, and use both hands to apply outward force keeping the leading edge taught and flat when feeding into the laminator.

This may also be caused by a lack of supply roll tension. Ensure that the films are tight and wrinkle free on the main laminating rollers. Apply tension evenly to the upper and lower roll films and run the laminator until there are no wrinkles.

Tip Apply tension a small amount at a time while running the laminator. The laminator may run for a couple of feet before showing the full effect of the adjustment.