ELECTRONIC POSTAL RATING SCALE OPERABLE IN METRIC AND AVOIRDUPOIS WEIGHT UNITS

摘要

An electronic postal scale measures the weight of anitem in metric or in avoirdupois units, at the user'selection. The scale also calculates a postal or shippingrate for the item, in accordance with a stored rate tabledefined in either metric or avoirdupois units. When theuser selects a class of service, the scale determineswhether there is a stored rate table for that class in thecurrently elected weight units. If not, the scaleautomatically changes to the other weight units andcalculates a rate according to a stored table in thoseother units.