Mid-weight simple spine booklets have the following characteristics:
See Exhibit 4-6.4 for various types of mid-weight simple spine booklets and further descriptions.
Exhibit 4-6.4
Mid-weight Simple Spine Booklets
Type
Description
Cover-to-Cover
Cover extends no more than 5/8" beyond inner pages.
Seal with a continuous glue line and one nonperforated tab 0.5" from the bottom leading edge. Minimum tab size: 1.5".
External Flap
Addressed side of the cover extends over all pages on the back to create a flap.
Flap length: At least 1.5" wide when measured down from the top edge. It may be longer, but it cannot be closer than 1" from bottom edge.
Flap attaches to the outside of the non-addressed side of the cover.
Internal Flap
Addressed side of the cover extends over internal pages to create a flap.
Flap length: At least 1.5" wide when measured down from the top edge.
Flap attaches to the inside of the non-addressed side of the cover.
Seal with a continuous glue as described in 4.5h, and one nonperforated tab 0.5" from the bottom leading edge. Minimum tab size: 1.5".
