Gatherer-stitcher having a folded-sheet feeder
AssigneeHeidelberger Druckmaschinen AG
InventorsSteffen Hoffmann, Falk Preuss
Life of this patent
Estimating the term…
Abstract
A gatherer-stitcher has a folded-sheet feeder and an apparatus for transferring folded sheets from the feeder to a transporting configuration of the gatherer-stitcher. The apparatus has a plurality of shafts or drums with grippers for gripping the folded sheets. The apparatus opens the folded sheets and places them astride the transporting configuration. The apparatus also has a blowing configuration which, as a folded sheet is transferred from one shaft or drum to another, subjects the folded sheet to a surge of air in time with a folded-sheet transportation.
Claims10
A gatherer-stitcher, comprising:
- a folded-sheet feeder;
- a transporting configuration;
- and
- an apparatus for transferring folded sheets from said feeder to said transporting configuration;
- said apparatus having a plurality of shafts or drums with grippers for gripping the folded sheets;
- said apparatus opening the folded sheets and placing the folded sheets astride said transporting configuration;
- said apparatus having a blowing configuration subjecting a folded sheet to a surge of air in time with a folded-sheet transportation, as the folded sheet is transferred from one shaft or drum to another, to ensure that the folded sheet is not missed by at least one of said grippers, said blowing configuration including nozzles rotating with one of said shafts or drums;
- and
- said blowing configuration being configured to direct said surge of air obliquely onto an overfold of the folded sheet and force said overfold onto at least one of said grippers.
A method for operating a gatherer-stitcher, the method comprising the following steps:
- transferring folded sheets from a folded-sheet feeder to a transporting configuration with a transfer apparatus;
- gripping the folded sheets with grippers of a plurality of shafts or drums of the transfer apparatus;
- opening the folded sheets and placing the folded sheets astride the transporting configuration with the transfer apparatus;
- subjecting a folded sheet to a surge of air in time with a folded-sheet transportation using a blowing configuration of the transfer apparatus, as the folded sheet is transferred from one shaft or drum to another, ensuring that the folded sheet is not missed by at least one of the grippers, the blowing configuration having nozzles rotating with one of the shafts or drums;
- and
- said blowing configuration being configured to direct said surge of air obliquely onto an overfold of the folded sheet and force said overfold onto at least one of said grippers.
Dependencies are inferred from the claim text.