Sheet-fed rotary press with reversal mechanism

Abstract

Abstract PURPOSE:To provide the titled printing press enhanced in paper gripping accuracy, reduced in installation cost and capable of being reduced in an occupying space, constituted so as to perform both single surface printing and double-surface printing by monolithic type cylinder arrangement wherein only one reversal cylinder is provided between both printing cylinders. CONSTITUTION:At a place for bisecting the outer peripheral part of the double- size reversal cylinder 5 arranged between double-size printing cylinders 3, 4 in the circumferential direction, a pawl shaft 23 having a double bearing structure and a pawl stand bar 31 are connected by a torsion bar 37 to be supported pivotally. In this case, a cam mechanism for reversing said cylinders between a paper gripping posture and a paper release posture as well as opening and closing the reversal pawls 26 on the pawl shaft 23 in both postures and a suction lever 56 which is reciprocally revolved by the cam mechanism and sucking paper released between the pawl in the paper gripping posture and the pawl stand from the pawl of the printing cylinder of the upstream side to permit the same to be gripped by said pawl and the pawl stand are provided. In single surface printing and double-surface printing, the reversing and the opening and closing of the reversal pawl around the same pawl shaft core are enabled and the simplification in structure, the enhancement of paper gripping accuracy and the acceleration of machine speed are attained while a spring member exposed to the outside is not required and load to the shaft is reduced.

Inventors

• 👤 Shoichi Kawaguchi
• 👤 川口　昇一

Bibliographic Details