目前我国的包装机均采用定量包装,有容积法和称重法,称重法多用单一的杠杆秤或电子秤。这对某些物品如蔬菜、水果、糖果等不易保证精度。国外研制了不定量包装机,即先将物品放到托盘内,收缩包装,然后送到电子秤进行称量,且将称量结果(单价、重量、金额)同时送入两套打印机,一套打印机按这些数据印制标签,将标签贴到称 At present, China’s packaging machines are used quantitative packaging, volumetric method and weighing method, weighing method using a single lever scale or electronic scales. This is not easy to ensure the accuracy of certain items such as vegetables, fruits, candies. Foreign developed a non-quantitative packaging machine, that is, the first article into the tray, shrink packaging, and then sent to the electronic scale for weighing, and the weighing results (price, weight, amount) into two sets of printers at the same time, The printer prints the label according to the data and labels the label