In this embodiment, the spring leg 54 can be coated with a low coefficient of friction material configured to allow the bag to readily traverse the guide assembly 19.Alternatively, as shown in FIGS. 6 and 7, the guide assembly 19 can be any mechanism or structure, such as a wedge 150 or a series of rollers 250, or any other mechanism or structure configured to urge the bag 22 of compressed blowing