BUCKLE FOLDING UNIT AND SHEET-FED FOLDING MACHINE INCLUDING THE BUCKLE FOLDING UNIT
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United States of America Patent
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Issued Date -
Jan 19, 2017
app pub date -
Jul 18, 2016
filing date -
Jul 16, 2015
priority date (Note) -
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Abstract
A buckle folding unit for sheets includes a buckle plate, three rollers that form a transport roller pair and a folding roller pair, and a blown-air nozzle for guiding the sheets. The at least one blown-air nozzle emits a blown-air jet in a direction radial to a common roller of the transport roller pair and the folding roller pair. The air jet places the sheet against the surface of the common roller and guides it into a nip of the folding roller pair in a defined way, advantageously resulting in an improved quality of the fold. A sheet-fed folding machine including a buckle folding unit is also provided.
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