An image forming apparatus includes a stacking unit, a feeding unit, an image forming unit, a discharge stacking unit, a detecting unit, a double-side feeding passage, and a controller. In a case that subsequent to a current recording material, a subsequent recording material is discharged, the controller determines a feeding timing of the subsequent recording material depending on a discharge interval time from discharge of the current recording material on the discharge stacking unit to discharge of the subsequent recording material on the discharge stacking unit, and determines the discharge interval time on the basis of print information of at least the subsequent recording material.

An image forming apparatus includes a stacking unit, a feeding unit, an image forming unit, a discharge stacking unit, a detecting unit, a double-side feeding passage, and a controller. In a case that subsequent to a current recording material, a subsequent recording material is discharged, the controller determines a feeding timing of the subsequent recording material depending on a discharge interval time from discharge of the current recording material on the discharge stacking unit to discharge of the subsequent recording material on the discharge stacking unit, and determines the discharge interval time on the basis of print information of at least the subsequent recording material.

An image forming apparatus includes a stacking unit, a feeding unit, an image forming unit, a discharge stacking unit, a detecting unit, a double-side feeding passage, and a controller. In a case that subsequent to a current recording material, a subsequent recording material is discharged, the controller determines a feeding timing of the subsequent recording material depending on a discharge interval time from discharge of the current recording material on the discharge stacking unit to discharge of the subsequent recording material on the discharge stacking unit, and determines the discharge interval time on the basis of print information of at least the subsequent recording material.

A folding machine includes a delivery arm, a lifting module and a mobile storage module movable horizontally relative to the lifting module. The lifting module is downstream of the delivery arm and includes a vertically positionable lifting level for folded sheets. During the delivery, the storage module is downstream of the lifting module and includes at least two vertically disposed storage levels drivable separately for putting a plurality of folded sheets into storage. A mobile storage module of a machine for folded sheets includes vertically disposed storage levels being driven separately for the storage of folded sheets. The storage levels include a driven second coupling element of a coupling device. A first coupling element of the coupling device is part of a lifting module. The machine improves workflow for post press processing. A production system for the graphic design industry in the post-production of printed products is also provided.

A folding machine includes a delivery arm, a lifting module and a mobile storage module movable horizontally relative to the lifting module. The lifting module is downstream of the delivery arm and includes a vertically positionable lifting level for folded sheets. During the delivery, the storage module is downstream of the lifting module and includes at least two vertically disposed storage levels drivable separately for putting a plurality of folded sheets into storage. A mobile storage module of a machine for folded sheets includes vertically disposed storage levels being driven separately for the storage of folded sheets. The storage levels include a driven second coupling element of a coupling device. A first coupling element of the coupling device is part of a lifting module. The machine improves workflow for post press processing. A production system for the graphic design industry in the post-production of printed products is also provided.