JPS6416653A - Printing press - Google Patents

Abstract

PURPOSE:To enable both thick printing paper and thin printing paper to be printed on a single press, by switching the timing for starting transmission of a rotating force from a rotating force transmitting means to a rotating means, to either a predetermined timing or a timing delayed behind the predetermined timing by a predetermined period of time. CONSTITUTION:With printing started, the leading end of a printing paper 12 comes into contact with a front guide 23, and is thereby once stopped. Thereafter, when the front guide 23 is tilted down forward or lifted upward, a cam 42 rotated in the direction of an arrow together with a transfer cylinder 28 comes into a roller 46 with a predetermined timing. By this, a lever 43 is turned counterclockwise, and a feeding roller 21 started rotating in the direction of an arrow by the action of the meshing of a rack 52 and a pinion 55, whereby the paper 12 is normally fed. A variation in the position of the roller 46 causes a variation in the timing for the contact of the cam 42 with the roller 46, whereby the contact can be delayed by a predetermined period of time.