GB351303A - Improvements in printing machines - Google Patents

Abstract

351,303. Printing-machines. HUCKINS, A. S., 257, Diamond Street, Philadelphia, U.S.A. Aug. 11, 1930, No. 24009. [Class 100 (i).] Sheet-separators; pile supports; grippermechanism.-Envelope blanks 1 are fed to the impression cylinder 2 of a rotary printing couple by means of a suction separator 17 mounted on an oscillating shaft 11 carried by endplates 12, 13 of the cylinder2, the nozzle at the end of the separator being moved outwardly from the cylinder at each rotation to. engage the foremost blank of the pile 1, and to separate a blank therefrom. The separator 17 is connected by a flexible tube 19 to the hollow shaft 5 of the cylinder 2, and the shaft 5 is periodically exhausted of air by means of a pump 4 and an oscillating valve which connects the shaft 5 to the pump. The movement of the separator 15 is controlled by means of an arm 14 which is secured to the shaft 11 parallel to the separator 17, and a fixed cam segment 15 which acts on the arm 14 and rotates the shaft 11 against the action of a spring 16. After the separator 17, which is formed with an orifice of oblong shape with the long side thereof parallel to the axis of the shaft 5, has seized a blank it remains substantially parallel to its original position, but is withdrawn into the cylinder 2. It moves backwards relatively to the cylinder 2, and the separated blank is gripped by an oscillating gripper 26 on a spring-controlled shaft geared to an oscillating segment. The pile 1 is retained by a holding device 21, and an oscillating picker 22 assists the separation of the blank by moving down between the holder 21 and the blank attached to the separator 17. After the arm 14 is released from the cam 15, the parts 14, 17 return to their original position relatively to the cylinder 2 under spring action. The blanks are printed on by a cylinder 29, and are detached from the cylinder 2 by a stripper 31 and stacked in a pile 32.