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Stripper – Lock Binding

Lock Binding Layout

   Hot Melt Adhesive
   Soft cover (after front and rear cover removal)
   LBS Tabbed End sheet Reinforcement
   Perfect Binder Side Glue

ODM Lock Binding Process

✔ Add LBS tabbed end sheets to pages
✔ Perfect Bind pages either with PUR or EVA
✔ Apply side glue while perfect binding
✔ Apply regular soft cover during perfect binding
✔ The soft cover basis weight needs to be 2 to 3 times thicker than LBS end sheet reinforcement.
✔ Strip front and rear soft cover from book block, leaving 1/4” wrap around on front and rear of block. ODM Stripper makes this process easy and precise. It is important that the binding is not damaged during this process.
✔ Casing-In and Building-In normally, positioning hot melt over the soft cover wrap. (If you are using a Super Sticker™ with hot melt).

Figure A

Hinge Point of Book

(If soft cover wrap is strong enough!)

Key Points of Lock-binding

  • Cover must hinge above the joint area to protect the binding. (Figure A)
  • Soft Cover MUST be stronger than the LBS reinforcement on the tabbed end sheets
  • Soft cover front and rear must be removed cleanly, not damaging the book block

Problems and Solutions

Book Block Sags Out of Cover

a. Soft cover wrap is not strong enough (forces hinge point towards spine).
b. Build in point is too low (closer to the spine).
c. Perfect binding side glue is not applied well.

ODM Stripper

Used to cleanly remove front and back cover, leaving a 1/4” wrap around.

Hinge Point Example

Lock Binding demo:

Lock Binding Book Block “How to Hardcover Bind on Small Perfect Binders” By Werner Rebsamen, Professor Emeritus RIT

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