Method of producing inner book involves sticking holder strips across inner book spine, and outer sheets of spine

摘要

Holder strips (2) gripping the rear edges (1b) along the spine (1a) of the inner book are stuck to the outer sheets of an inner book (1) and to the inner book spine. Near the top and bottom of the inner book spine are holder strips (3) stuck across the inner book spine. The inner book is then rounded and pressed. Holder strips (4) are stuck a across the inner book spine.