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Diagonal-seam correspondence envelope

Diagonal-seam correspondence envelope developed as a fixed-size paper pattern with separate cut, fold and joining marks. Use the stated drawing sizes and make an empty trial before choosing material or contents.

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Paper
US Letter
Pages
3
Sheet
215.9 × 279.4 mm
Format
Print PDF
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Pages in this PDF
  • Page 1 — Assembly instructions
  • Page 2 — One-piece envelope net
  • Page 3 — Assembly instructions

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Diagonal-seam correspondence envelope / LETTER

A good fit for your idea?

Letter and A4 preserve the component dimensions. Choose the sheet you will print, not a different object size.

Materials and construction

Plain paper for a first trial, a ruler, scissors and a blunt scoring tool; adult help for internal cuts.

Before making a batch

Measure the 50 mm reference and at least two named panel dimensions.

Assemble an empty plain-paper trial; record closure, seam, clearance and material behavior.

Inside this edition

Instruction pages
2
Orientation
Portrait

Envelope front and back panels: 86 x 58 mm. Side joining flaps: 12 mm.

No postal, archival, chemical barrier or negative-storage claim is made.

From file to finished page

  1. Cut the complete envelope net, keeping both shaded side tabs attached. Score the four panel boundaries.
  2. Fold the side tabs inward, then fold the back panel over them. Apply adhesive only to the shaded side tabs and leave the top opening clear.
  3. Fold the top flap down over the back. Hold it shut with a removable seal or a separate paper band; the flap has no locking tongue or receiving slit.
  4. Dry-fit an expendable paper insert and open the closure repeatedly. Keep adhesive away from the insert and do not force a tight fit.
Printing and use notes

Nominal drawing dimensions are not a tested usable-capacity, load, mailing, food-contact or archival specification.

Do not place valuable, wet, hot or breakable items in an unreviewed paper prototype.

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Diagonal-seam correspondence envelope