Patent ID: 6877429
Filing Date: 2005-04-12
Classification: B41F,B41P

Abstract:
1. A roller holding apparatus of a printing press, comprising: a first roller; an arm having a support portion for rotatably supporting a second roller, the arm being adapted to selectively swing between a printing position in which the second roller is placed in a holding position where the second roller is in contact with said first roller and a third roller, and a replacement position in which the second roller is held in a release position where the second roller is separated from the third roller; a holder supported by said arm and selectively swingable between a holding position in which the second roller is held by said arm, and a release position in which the second roller is allowed to be released from the arm, the holder swinging to the release position when the arm is in the replacement position; a pressing member, provided in said holder, for pressing the second roller against said first roller, said pressing member including a first pin provided with a contact portion in contact with the second roller, and a first elastic member that urges said first pin in a direction in which the second roller is pressed against said first roller via said contact portion when said holder is in the holding position, and said pressing member presses the second roller against said first roller and the third roller via said contact portion when said arm is in the printing position; a second pin that engages said holder and said arm for maintaining said holder at the holding position when said holder is in the holding position; and a second elastic member that urges said second pin in a direction in which said holder and said arm engage each other, such that said holder is allowed to be moved to said release position by moving said second pin against an urging force of said second elastic member, wherein when said holder is in said holding position while said arm is in said replacement position, the second roller is held in contact with said contact portion, being urged towards the second roller by said first elastic member, said support portion, and said first roller, and wherein when said holder is in the release position while said arm is in the replacement position, the second roller is held in contact only with said support portion and said first roller, and the second roller is replaced through a space opened upon movement of said holder to the release position.