For blank-fed envelope making machines, blank sheets are cut by Envelope paper punching machines, Eccentric cutters. These machines use some types of cutting dies, steel cutting rules.
Window cutting and patching to a pre-punched blank is done before making envelope process, for all kinds of envelopes such as open-end and open-side.
FG/2R machine applies arabic(remoistenable)gum to a envelope flap. FFDW/G-3 machine is provided with an arabic seal gummer and a heat-drier.
FF series and NRNH series machines can produce quality open-end envelopes. FFDW series machines can produce diamond and wallet shape envelopes.
Pressure sensitive gumming, One-touch seal gumming, Self-seal gumming is done on a seal flap or on a body of a completed envelope.