16 Stationery; bookbinding cloth; bookbinding tape; bookbinding wire; mechanical binder sets composed of rings and dividers; adhesives for stationery and for bookbinding purposes; envelopes; electric typewriters and duplicating machines; plastic sheets for printing, writing and marking; file folders; letter files; plastic bubble packs for packaging; paper tray covers; stationery-type binding portfolios; metal wires and thermal covers for stationery and bookbinding purposes, paper rolls for calculators; foils and bags for lamination, paper, cardboard and plastic covers for use with laser printers, inkjet printers, and bookbinding and publication binding machines