Formax 7200 Series - Manual (Page 65)

64
Glue area
The bottom flap of the envelope
should be in-line or below the top of
the seam shoulders
Good example
Top edge of window to be flat
and free from puckering
Bad example - Out of
Specification
Windows to be securely affixed to
within 1.5mm (
1
16
") of top and side
edges.
Position of internal side seams to
give a minimum of 5mm (
3
16
")
clearance or overlap to the edge of
any insert
20mm minimum
14mm minimum to edge of address carrier
Flap crease to be scored sufficiently to prevent distortion of envelope
between window and flap crease when closing and sealing.
Window width to be less than
40% of envelope width.