Filling characteristics and dosing accuracy of volumetric dosing devices in vertical form-fill-seal machines

A study has been made of the physical characteristics of the particulate products to be filled in vertical form-fill-seal machines and the configuration and dimensions of the filling and dosing devices commonly employed. Filling from cups with different opening mechanisms and filling systems using an auger have been examined, and the dosing accuracy found in all instances to be more dependent on variations in the bulk density, general particle shape and size etc. of the product being filled than on the dimensions etc. of the filling device. Results are reported on many of the possible characteristics in an attempt to find the relevant one(s) but it is concluded that our knowledge of product characteristics is insufficient and that more research is required. (ILV)