Carbon Neutral

Manufacturing process

Basic sheet-fed manufacturing process

  • Insertion of the formats
  • PRINTING
  • Die-cut of the window and marks of the folded
  • Window material glued
  • Side seams gummed
  • Folding and gluing of the side seams
  • Layered placement of envelopes in preparation for gumming the closing flap
  • Gumming of the closing flaps
  • Drying
  • Folding of the closing flaps
  • Exit and final count

A simplified manufacturing process on reel fed machines

  • Paper feeding stage
  • Paper tension units
  • Paper alignment units
  • Web printing units (flexo)
  • Scoring of closing flap and back flap in preparation for folding
  • Scoring of side seams in preparation for folding
  • Cutting of closing flap, side seams and back flap with winged blades
  • Cutting of closing flap, side seams and back flap rotary cutters
  • Window cutting station
  • Glueing of window plastic
  • Folding of side seams (interior)
  • Cut to separate paper from a reel to a single open format
  • Side seam gumming stage
  • Back flap folding stage
  • Folding of side seams (exterior)
  • Layered placement of envelopes in preparation for gumming the closing flap
  • Gumming of the closing flaps
  • Drying stage
  • Separation of envelopes in preparation for folding the closing flap
  • Closing flap folding stage
  • Delivery of the finished product throught a counting machine