Plate clamping unit for offset press

A plate clamping unit for use in an offset press comprising:

• a printing plate having a first and a second ends;
• a plate cylinder for receiving a printing plate;
• a first clamping mechanism for holding the first end of the printing plate;
• a second clamping mechanism for holding the second end of the printing plate;
• said plate cylinder having a groove extending in the axial direction of the plate cylinder on the outer periphery for carrying the first and the second clamping mechanisms;
• said first and the second clamping mechanism being arranged to rotate and move in the axial direction of the plate cylinder;
• a torsion adjusting screw disposed in a first end portion of the clamping mechanism for adjusting the torsion of the printing plate in accordance with the movement of the plate cylinder in it axial direction;
• and

A plate clamping unit for use in an offset press machine comprising:

• a printing plate having a first end and a second end;
• a plate cylinder for carrying the printing plate;
• a first clamping mechanism for clamping the first end of the printing plate;
• a second clamping mechanism for clamping the second end of the printing plate;
• said plate cylinder having a groove axially extending in the outer peripheral surface of the cylinder, said groove having an inner wall for mounting the first and second clamping mechanism;
• said second clamping mechanism including a plurality of clamping modules juxtaposing in the axial direction of the plate cylinder;
• a connecting member for connecting the clamping modules and changing distances between the adjacent clamping modules for in response to contracting of printing sheets;
• and
• biasing means disposed at ends of the clamping modules for pressing the second clamping mechanism in the groove.

A plate clamping unit for use in an offset press comprising:

• a printing plate having a first and a second ends;
• a plate cylinder for carrying the printing plate;
• a first clamping mechanism for holding the first end of the printing plate, said first clamping mechanism being movable in the radial direction of the plate cylinder for an opening and a closing motions;
• a second clamping mechanism for holding the second end of the printing plate, said second clamping mechanism being movable in the radial direction of the plate cylinder for an opening and a closing motions;
• a setting groove extending in the axial direction in the outer periphery of the plate cylinder for accommodating the first and the second clamping mechanisms;
• said second clamping mechanism movably disposed in the setting groove between the waiting position in the vicinity of the first clamping mechanism and the working position away from the first clamping mechanism;
• a moving mechanism for moving the second clamping mechanism from the waiting position to the working position;
• a torsion adjusting screw for adjusting the torsion of the printing plate by moving the plate cylinder in the direction of the axis thereof, said torsion adjusting screw being screwed in one end portion of the clamping mechanism;
• and
• a biasing means for pressing the torsion adjusting screw against the inner wall of the setting groove, said biasing means being provided at the other end portion of the clamping mechanism.

A plate clamping unit for use in an offset press comprising:

• a printing plate having a first and a second ends;
• a plate cylinder for carrying the printing plate;
• a first clamping mechanism being movable in the radial direction of the plate cylinder for opening and closing motions for holding the first end of the printing plate;
• a second clamping moveable in the radial direction of the plate cylinder for the opening and closing motions for holding the second end of the printing plate;
• a groove formed in the outer periphery of the plate cylinder so as to extend in the axial direction of the plate cylinder, for accommodating the first and the second clamping mechanisms;
• said second clamping mechanism being movable between the waiting position closed to the first clamping mechanism and the working position away from the first clamping mechanism;
• a moving mechanism for moving the second clamping mechanism from the waiting position to the working position;
• said second clamping mechanism having a plurality of clamping modules juxtaposing in the axial direction of the the plate cylinder;
• connecting means for connecting the clamping modules and changing distance between the clamping modules in response to contracting of printing sheets;
• and
• a biasing means disposed at ends of clamping modules for pressing the second clamping mechanism.

A plate clamping unit for use in an offset press comprising:

• a printing plate having a first and a second ends;
• a plate cylinder for being set with the printing plate;
• a first clamping mechanism for clamping the first end of the printing plate;
• a second clamping mechanism for clamping the second end of the printing plate;
• a groove formed in the outer periphery of the plate cylinder so as to extend in the axial direction of the plate cylinder, for accommodating the first and the second clamping mechanisms;
• said second clamping mechanism being movable between the waiting position closed to the first clamping mechanism and the working position away from the first clamping mechanism;
• a moving mechanism for moving the second clamping mechanism from the waiting position to the working position;
• said second clamping mechanism having a plurality of clamping modules juxtaposing in the axial direction of the the plate cylinder;
• a torsion adjusting screw screwed in an end portion of the clamping mechanism for adjusting the torsion of the printing plate by moving the plate cylinder in the axial direction;
• said second clamping mechanism including a plurality of clamping modules placed side by side in the axial direction of the plate cylinder;
• a connecting means for connecting the clamping modules to adjust each distance between the clamping modules in response to contracting of printing sheets;
• and
• a biasing means disposed at ends of clamping modules for pressing the second clamping mechanism.

A plate clamping unit for use in an offset press comprising:

• a printing plate having a first and a second ends;
• a plate cylinder for receiving the printing plate;
• a first clamping mechanism being movable in the radial direction of the plate cylinder for opening and closing motions for holding the first end of the printing plate;
• a second clamping moveable in the radial direction of the plate cylinder for the opening and closing motions for holding the second end of the printing plate;
• a groove formed in the outer periphery of the plate cylinder so as to extend in the axial direction of the plate cylinder, for accommodating the first and the second clamping mechanisms;
• said second clamping mechanism being movable between the waiting position closed to the first clamping mechanism and the working position away from the first clamping mechanism;
• a moving mechanism for moving the second clamping mechanism from the waiting position to the working position;
• said one of first and second mechanisms being arranged to rotate in the groove;
• said one of first and second clamping mechanisms being arranged to move in the axial direction of the plate cylinder;
• a torsion adjusting screw disposed at an end of the clamping mechanism for adjusting the torsion of the printing plate by moving the plate cylinder in the axial direction;
• first biasing means disposed at the other end portion of the clamping mechanism movably for pressing the torsion adjusting screw against the inner wall of the groove;
• said second clamping mechanism including a plurality of clamping modules placed side by side in the axial direction of the plate cylinder;
• connecting means for connecting the clamping modules and changing distances between the clamping modules in response to contracting of printing sheets;
• and
• second biasing means disposed at ends of the clamping modules for pressing the second clamping mechanism to support in the setting groove.