US 6,553,331 B2 · Weight checking apparatus

Abstract

A weight checking apparatus is provided to prevent items that have not been properly checked from slipping through the weight checker. A weight checker includes a weight conveyor, a loading sensor, a weighing portion, a weighing conveyor weight change monitoring means, an item weight calculation means, and a controller. The loading sensor detects the loading of an item on the weighing conveyor. The weighing portion detects the weight of the weighing conveyor. The controller switches between the weighing conveyor weight change monitoring process and the item weight calculation process based on a detection signal from the loading sensor. The weighing conveyor weight change monitoring process monitors a change in the weight value of the weighing conveyor. The item weight calculation process calculates the weight of the item from the weight value detected by the weighing portion.

Claims17

Dependent claims

A weight checking apparatus comprising:

a weighing conveyor for conveying an item;
a sensor configured to detect a loading of the item on said weighing conveyor;
weight detection means configured to detect a weight value of said weighing conveyor;
and
a controller having weight calculation means and weight change monitoring means and operatively coupled to said sensor and said weight detection means, said weight calculation means being for calculating a weight of the item based on the weight value detected by said weight detection means and capable of functioning when said sensor detects a loading of the item, said weighing conveyor weight change monitoring means being for monitoring a change in the weight value detected by said weight detection means and capable of functioning when said sensor does not detect a loading of the item.

2 more elements

Dependencies are inferred from the claim text.

Weight checking apparatus

Life of this patent

Weight checking apparatus

Life of this patent

Abstract

Claims17