Device for evaluating wrinkles in a double rolled seam

摘要

A seam projector has a seam holding device attached to the base portion of the seam projector. The seam holding device has a lever arm which is pivotally attached to the base portion of the seam projector. The seam holding device has a seam guide attached to the lever arm such that the seam guide is aligned with a mirror head on the side of the seam projector when the lever arm is oriented vertically. A nomograph may be overlayed on the projection screen of the seam projector for quantitatively evaluating the severity of wrinkles which appear on the projection screen.