Description
Class B31B : MAKING BOXES, CARTONS, ENVELOPES, OR BAGS
Subclass 1/22: Box, carton, envelope or bag making machinery characterised by performing specific operations (machinery for performing operations of general application, see the appropriate subclasses) Cutting, e.g. perforating, punching, slitting, trimming Cutting sheets or blanks Notching; Trimming edges of flaps