Canon Perfect Binder A1 Troubleshooting Manual page 24

If glue is applied in this condition, the stack goes sagged and registration adjustment is not performed correctly, and this leads
to [Slanted spine glue] [E] or [Imbalance of side glue] [F].
In this case, execute the curl correction in the step 1) and perform again from the step 5).
After performing the step 5), if the [Slanted spine glue] or [Imbalance of side glue] is resolved but the side glue amount is still
excessive, then perform b) Spine glue is pushed and spread over in a T (L) letter shape or an excessive amount of glue.
Refer to the following table for details.
Location Condition
[E] Slanted spine glue
[F] Imbalance of side glue
d) Curved spine glue or an imbalance of side glue amount between the front and the rear sides
A curved spine [G] due to insufficient application to corners in folding the spine or a difference of side glue amount between the
front and rear sides [H] due to the foreign substances on the stack registration guide rarely occurs. In this case, check if any
foreign substance is on the stack registration guide as stated in the step 4) and if there is any, remove the foreign substances.
Spine glue slants.
Only one side of the side glue is excessive and reaches 7mm or more.
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Description