ELECTRONIC POSTAL RATING SCALE OPERABLE IN METRIC AND AVOIRDUPOIS WEIGHT UNITS

摘要

An electronic postal scale measures the weight of an item in metric or in avoirdupois units, at the user's election. The scale also calculates a postal or shipping rate for the item, in accordance with a stored rate table defined in either metric or avoirdupois units. When the user selects a class of service, the scale determines whether there is a stored rate table for that class in the currently elected weight units. If not, the scale automatically changes to the other weight units and calculates a rate according to a stored table in those other units.