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What is the envelope construction and material for the FastPac Inserting System DI900 or DI950

UPDATED: 19 June 2015

Envelopes shall be standard side seam, diagonal side seam, executive or die cut, with or without patched windows.

Note: Unpatched (open) window outer envelopes are not permitted.

Window patches shall be flat, ripple free and glued to within 0.06 inch (1.6 mm) of the top edge of the patch material and the window cutout.

Envelope materials shall include new or recycled white wove, manila, cranes crest and lithographic material. Tyvek® envelopes or envelopes with external fasteners are not permitted.

Envelopes with re-moistenable flap adhesives made of starch (dextrin), resin (tropical formulation) or combination of the two may be used. No self-seal, peel and stick, or pressure seal envelopes are permitted. 

Envelope Size for Insertion

  • Envelopes should be at least 0.5 inch (13 mm) wider than the sum of the maximum width of the insert pack plus the thickness of the pack
  • Envelopes should be at least 1/4 inch (6 mm) deeper than material to be inserted

Envelope Curl/Wrap

  • An envelope placed flap up on a flat surface under its own weight shall have no corner raised more than 0.5 inch (13 mm) from the surface
  • Curl/Warp of the envelope flap should not exceed 1/16 inch (3 mm) measured while holding flap on flat surface at the crease line


Letter-Sized Envelope Specifications

Parameter

Minimum Value

Maximum Value

Width  

6.37" (162 mm) 

10.5"(266 mm)

Depth

3.5” (45 mm)

6.5” (165 mm)

Throat Depth 

   

Paper Weight

70 gsm

90 gsm

Flap Depth

1.2” (30 mm)

2.5” (63 mm)

Curl/Wrap

 

1/16” (3 mm) (measured holding flap at the crease line)

90 gsm Flap Depth

 

Throat Depth

 

 

Flat-Sized Envelope Specifications

 

Parameter

Minimum Value

Maximum Value

 

Width

9” (228 mm)

10.5” (266 mm)

Depth

6.5” (89 mm)

13” (330 mm)

Paper Weight

80 gsm

2.5” (63 mm)

Curl/Wrap

1/16” (3 mm) (measured holding flap at the crease line)