Patent US 3,953,017

An improved system for producing different magazines composed of different predetermined combinations of signatures for different subscribers in accordance with predetermined criteria from known subscriber information includes a main gatherer for forming main combinations of signatures. A secondary gatherer provides special combinations of signatures in accordance with the known subscriber criteria. Each special combination of signatures is combined with a main combination of signatures to form a complete magazine. In one form of the invention, if for some reason the secondary gatherer should malfunction, a resulting imperfect special combination of signatures is rejected. A supplemental feed is then activated to replace the rejected special combination of signatures with a standard combination of signatures which is combined with a main combination of signatures to form a magazine.