Device and method for determining a signature lap
AssigneeHeidelberger Druckmaschinen AG
InventorsGeorge Athans, Christian Heinz Miescher, Leon Christopher Cote
Life of this patent
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Abstract
A folder system includes an adjustable-lap folder for folding signatures so-as to define folded signatures, an optical sensor for measuring a presence of the fold&ed signatures, and a controller connected to the rotary blade folder and the optical sensor for determining a lap of the folded signatures. Also provided is a method for folding signatures comprising folding signatures in a folder so as to define folded signatures, and measuring with an optical sensor the edges of the folded signatures so as to determine a lap.
Claims8
A folder system comprising:
- an adjustable-lap folder for folding signatures so as to define folded signatures, the adjustable lap folder being a rotary blade folder having a pin shell and a blade shell with at least one folding blade;
- an optical sensor for detecting a presence of the folded signatures, the optical sensor having an output;
- and
- a controller connected to the folder and the optical sensor for determining a lap of the folded signatures;
- the controller including a processor for detecting a folded edge and a last edge of the folded signatures, the controller moving the pin shell with respect to the blade shell as a function of the output.
A method for folding signatures comprising:
- folding signatures in a folder so as to define folded signatures, said folder having a pin shell and a blade shell, the folding step including pinning a lead edge of a signature and contacting the signature at a set distance from the lead edge with a folding blade;
- measurement to a controller;
- and detecting with an optical sensor edges of the folded signatures so as to determine a lap measurement;
- blade shell to alter the set distance between the lead edge and the folding blade so as to change the lap using a feedback from said controller.
Dependencies are inferred from the claim text.