Plustek PS3140U User Manual page 24

However, don't use the ADF to scan documents if they meet any of the following
conditions:
Paper lighter than 40 g/m
Paper with clips or staples attached
Paper with inconsistent thickness, e.g., envelops
Paper with wrinkles, curls, folds, or tears
Paper with an odd (non-rectangular) shape
Paper with static electricity
Tracing paper
Carbon paper, pressure sensitive paper, carbonless paper
Items other than paper, e.g., cloth, metal foil.
Attention
2
(10 lb.) or heavier than 220 g/m
DO NOT use the ADF to scan photographic
sheets or particularly valuable document
originals; wrinkles or other damages can
happen in case of paper feeding errors.
DO NOT place paper with wet ink or
correction fluid into the ADF. Wait few
minutes for it to get dry.
20
2
(58 lb.)