Maschinenbau Oppenweiler Binder Gmbh & Co.

Fritz Heina

Axel Adam

A sheet deflector for noise reduction in multi-stage folding machines having first and second folding rollers (1,3) with a clearance space (5) between them, with said space (5) being in the path of a sheet (8) to be folded, comprising a sheet deflector (4) having a curved guide surface (20) for deflecting the sheet, at least one slot-shaped opening in the sheet deflector (4) extending toward the bottom of said curved guide surface (20) and extending towards an intake opening (7) between a third folding roller (2) and the second folding roller (3) and a blade-shaped slide (12) which can be horizontally moved out of said slot-shaped opening towards the intake roller opening (7) when the sheet deflector (4) is inserted between said first and second rollers (1,3), whereby the blade-shaped slide (12) is adapted to guide the sheet so that it is folded exactly and faultlessly with very little noise into the bite between first and second rollers (1,3).

Sheet deflector for noise reduction in multi-stage folding machines

A device for reducing the emission of noise in buckle folding units provided with noise control enclosures, comprising a noise control hood 5 essentially completely enclosing the upper 41 and lower folding pockets 42 and the folding rolls 7, said noise control hood 5 being at least partially slidingly displaceable, tiltable and/or removable and being provided with a slot for the passage of the sheet in the associated hood section, which slot is aligned with the nip of the pair of intake and discharge rolls, respectively, is improved by further reducing the noise emission in the sheet discharge area without influencing dependable function and easy access to this area. This is obtained by the fact that the hood section associated with the pair of discharge rolls 71, 72 comprises a cover plate 10 having a vertical first section 12 secured to the hood and a second section 11 held on the first section 12 pivotably between an inclined closed position adjoining to the hood and an opened position above the folding rolls 7, wherein the longitudinal edges, being parallel to the roll axes, of the discharge slot 15 provided in the vertical section 12 are arranged such as to form noise emission sealing sites in cooperation with the peripheral surfaces of the pair of discharge rolls 71, 72.

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Murrhardt, Germany

Fritz Heina