Suction head for sheet feeding apparatus
AssigneeHeidelberger Druckmaschinen AG
InventorArno Wirz
Life of this patent
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Abstract
A suction head for feeding sheets in sheet-processing machines from a stacked pile of sheets to further sheet transporting means includes suction separation devices for lifting sheets off of a pile of sheets and transport suction devices for taking over the lifted sheet lifted by the suction separation devices and advancing the lifted sheet in a transport direction towards the further sheet transporting means. Control means are provided for moving the separation suction devices in the transport direction for at least part of the transport distance at the same velocity as the transport suction devices whereby the suction separation devices assist in transporting the lifted sheet over the aforementioned part of the transport distance.
Claims10
A suction head for feeding sheets to further sheet transporting means comprising suction separation means for lifting sheets off a pile of sheets, transport suction means for taking over the sheet lifted by the suction separation means, said transport suction means being movable over a given transport distance for advancing the sheet in a transport direction towards said further sheet transporting means, and control means for moving said suction separation means in said transport direction over a distance shorter than said transport distance simultaneously with and at the same velocity as said transport suction means, whereby said separation suction means assist said transport means in transporting the lifted sheet over said shorter distance.
A suction head for feeding sheets to further sheet transporting means comprising suction separation means for lifting sheets off a pile of sheets, transport suction means for taking over the sheet lifted by the suction separation means and advancing said sheet in a transport direction towards said further sheet transporting means, and control means for moving said separation suction means in said transport direction for a predetermined part of the transport distance of said sheet at the same velocity as said transport suction means, whereby said separation suction means assists in transporting the lifted sheet over said part of said transport distance, said suction separation means including a suction device, a lever mechanism operatively connected to said suction device, and a first cam actuating said lever mechanism to provide vertical displacement of said suction device, said lever mechanism including a generally vertically disposed first lever on the lower end portion of which said suction device is mounted, guidance means guiding said lever as the latter moves in a vertical direction, means for pivotally and pendulously mounting said guidance means, and a second cam for effecting pivotal movement of said guidance means and the suction device mounted on said guided lever in a synchronous manner with the operation of said transport suction means.
Dependencies are inferred from the claim text.