EP 0405166 A2 19910102 - Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine.
Title (en)
Device for smoothing the sheets on the impression cylinder of a sheet-fed rotary printing machine.
Title (de)
Vorrichtung zur Bogenglättung am Druckzylinder in einer Bogenrotationsdruckmaschine.
Title (fr)
Dispositif pour déplisser les feuilles sur le cylindre d'impression dans une presse rotative à feuilles.
Publication
Application
Priority
DE 3920730 A 19890624
Abstract (en)
[origin: JPH0336033A] PURPOSE: To effectively and sufficiently smooth a printing sheet on an impression cylinder by swingably supporting an air flow nozzle at a swinging shaft parallel to an axis of the cylinder as a center, and connecting it to a driving member to conduct a swingingly moving forward and reverse at the time of an operating stroke of a printer. CONSTITUTION: In order to effectively and sufficiently smooth a printing sheet 1 on a circumference of an impression cylinder 3, air supply nozzles 8 at an interval to a printing gap 5 forward from the gap 5 are directed toward the circumference of the cylinder 3, swingably supported to a swinging shaft 9 as a center. And when a feeding direction of the sheet 1 is observed at the time of an operating stroke of a printer, it is connectible to a driving member 13 to swing forward and backward. The nozzles 8 are constituted as a lead type nozzle. An air flow in a turning angle range β1 is directed toward a rear end of the sheet by turning to a forward position from a return rotated position '0'. Thus, the sheet is raised from the circumference of a conveyor drum 2 and hence not stained.
Abstract (de)
Die Vorrichtung ist zum glatten Anlegen von Druckbogen (1) am Druckzylinder (3) vor dem Druckspalt (5) einer Bogenrotationsoffsetdruckmaschine bestimmt und weist wenigstens eine gegen den Umfang des Druckzylinders (3) richtbare Blasdüse (8) zum Anpressen des Bogens durch die Kraftwirkung strömender Luft auf. Diese Blasdüse (8) ist mit einem Abstand vor dem Druckspalt (5) um eine parallel zur Achse des Druckzylinders (3) liegende Pendelachse (9) pendelbar gelagert und mit einem Antrieb kuppelbar, der die Blasdüse im Arbeitstakt der Maschine schwingend in Laufrichtung des Druckbogens (1) vor- und zurückbewegt.
IPC 1-7
IPC 8 full level
B41F 21/00 (2006.01); B41F 25/00 (2006.01)
CPC (source: EP US)
B41F 21/00 (2013.01 - EP US); B41F 25/00 (2013.01 - EP US); B65H 2406/1222 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0405166 A2 19910102; EP 0405166 A3 19910731; EP 0405166 B1 19940309; AT E102546 T1 19940315; CA 2015948 A1 19901224; CA 2015948 C 19950117; CN 1017034 B 19920617; CN 1048353 A 19910109; DE 3920730 A1 19910110; DE 3920730 C2 19911010; DE 59004865 D1 19940414; JP H0336033 A 19910215; US 5086698 A 19920211
DOCDB simple family (application)
EP 90110278 A 19900530; AT 90110278 T 19900530; CA 2015948 A 19900502; CN 90103691 A 19900524; DE 3920730 A 19890624; DE 59004865 T 19900530; JP 15887890 A 19900619; US 54242590 A 19900622