Zero-point adjusting method for automatic weighing apparatus

An automatic weighing apparatus comprising:

• a first conveyer for bringing in a commodity;
• a second conveyer for receiving the commodity from said first conveyer;
• a third conveyer for receiving the commodity from said second conveyer;
• first, second and third sensors each disposed adjacent to one of the three conveyers and having an output for indicating when a commodity is present on the adjacent conveyer;
• control means for preventing the transfer of additional commodities from the first conveyer to the second conveyer when the second sensor indicates the presence of the commodity on the second conveyer;
• means connected to said second conveyer for weighing the commodity and said second conveyer and producing a weight signal;
• first storage means for receiving a first weight signal when the second sensor indicates the absence of the commodity on the second conveyer and storing a zero point weight in response thereto;
• second storage means for receiving a second weight signal when the second sensor indicates the presence of the commodity on the second conveyer and storing a commodity weight on the basis of the second weight signal and the zero point weight;
• labeling means positioned adjacent to said third conveyer so as to apply a label indicating the commodity weight to the commodity while carried by said third conveyer.