Man Roland Druckmaschinen Ag

M.a.n.-roland

Herbert Geschwindner

Paul Abendroth

A device for the delayed piling of sheets in a delivery mechanism of a sheet fed printing press to provide time for the insertion of a temporary receiving tray as a filled pile board is removed and replaced by an empty pile board. A buffer storage device is located immediately above the support for the receiving tray for intercepting sheets entering the receiving space. The buffer storage device includes a front edge support for supporting the front edge of a sheet and a rear edge support for supporting the rear edge of the sheet. At least the rear edge support, which occupies a normal horizontal position, has a hinge mounting but is lightly counterbalanced so that the first few sheets, upon making a pile change, are intercepted providing a time delay for insertion of the receiving tray, but with the accumulated weight of the first few sheets being sufficient to overcome the counterbalancing force so that the intercepted sheets, following the time delay, are automatically dumped as a group upon the tray. In the preferred form of the invention the rear support is of dog-leg cross section having a horizontal support leg and a generally vertical counterbalancing leg with a pivot axis between them. Also in the preferred embodiment a sheet brake assembly is mounted on the frame adjustably positionable for accommodating sheets of different length, with the rear edge support being hinged to the subassembly for simultaneous adjusting movement therewith.

Device for the delayed piling of sheets

A delivery mechanism for a sheet fed printing press in which a rear edge guide in the form of a traverse member guides the rear edges of the downwardly settling sheets into a condition of register. A brake assembly is provided for engaging the trailing edges of the sheets to decelerate them, the assembly being horizontally adjustable to accommodate sheets of different length and the traverse member being coupled by linkage to the brake assembly for simultaneous adjustment therewith. An intermediate stacking mechanism is provided having a horizontal frame and an intermediate pile receiver which is shiftable between a receiving position and an out-of-the-way position for temporarily accumulating sheets during a pile change. Detent assemblies at the ends of the traverse member lock the traverse member to the frame following horizontal adjustment. The frame of the intermediate stacking mechanism is adjustable in vertical position and the linkage for connecting the traverse member to the braking assembly is vertically extensible, being in the form of a pantograph, so that the traverse member serves as a positively positioned rear edge guide for both (a) the sheets deposited to form the intermediate pile and (b) the sheets subsequently deposited thereon to form a main pile thereby to maintain the rear edges of all of the sheets in register.

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Wachtersbach, Germany

Herbert Geschwindner