Feeder for sheet-feed printing machine

A feeder for a sheet-feed printing machine capable of feeding paper sheets of different widths and having a pallet on a pile board loaded with a paper sheet pile movable to the right and left in a direction lateral to the feed direction to feed paper sheets and for moving up said pile board to a printing unit through a side register lay, comprising;

• an automatic lateral position control mechanism disposed above said pile board along the lateral direction having a rotatable threaded shaft and a means coupled thereto to rotate said threaded shaft,
• a first sensor means, disposed movably along said threaded shaft according to the rotation of said threaded shaft, and disposed against the upper lateral sides of said paper sheet pile for detecting the position of a side edge of said paper sheet pile on said pile board,
• paper sheet position adjusting means for moving said pallet on said pile board in the right and left directions in response to a detection signal from said first sensor means to adjust the position of the paper sheets,
• a remaining paper sheet detecting sensor means for detecting reduction in amounts of remaining original paper sheets on said pile board,
• a pile top surface detecting sensor means for detecting, as said pile board loaded with a new paper sheet pile is moving up, the top surface of said new paper sheet pile reaching a predetermined position, and
• control means for controlling said automatic lateral position control mechanism so that, when said remaining paper sheet detecting sensor means detects a reduction in the amount of paper sheets, said first sensor means is separated from the side edge of said paper sheet pile and that, when said pile top surface detecting sensor means detects that the top surface of said new paper sheet pile reaches a predetermined position, said first sensor means is moved to a position where said first sensor means can detect the side edge of said paper sheet pile.

A feeder for a sheet-feed printing machine having a pallet on a pile board loaded with a paper sheet pile movable to right and left in a direction lateral to the feed direction to feed paper sheets and for moving up said pile board to a printing unit through a side register lay, comprising;

• an automatic lateral position control mechanism disposed above said pile board along the lateral direction having a rotatable threaded shaft and a means coupled thereto to rotate said threaded shaft,
• a first sensor means, provided on a member movable along said threaded shaft according to the rotation of said threaded shaft, for detecting the position of a side edge of said paper sheet pile,
• paper sheet position adjusting means for moving said pallet on said pile board right and left in response to a detection signal from said first sensor means to adjust the position of the paper sheets,
• non-interrupting paper replenishing means comprising,
• a rod inserted under the bottom surface of said paper sheet pile through a groove of said pallet and loaded on said rod,
• a second sensor means for detecting insertion of said rod, and
• control means for interrupting operation of said paper sheet position adjusting means while said second sensor means is detecting inserting of said rod.

A feeder for a sheet-feed printing machine having a pallet on a pile board loaded with a paper sheet pile movable to the right and left in a direction lateral to the feed direction to feed paper sheets and for moving up said pile board to a printing unit through a side register lay, comprising;

• a threaded shaft extending in a direction lateral to the feed direction,
• a first sensor means movable along said threaded shaft in the lateral direction in response to rotation of said threaded shaft to detect an edge of said paper sheet pile,
• a moving mechanism to move said first sensor means together with said threaded shaft in the lateral direction an amount equal to the distance between a position at which said paper sheet pile is to be positioned when a left-pulling side register lay is used and a position at which said paper sheet pile is to be positioned when a right-pulling side register lay is used,
• paper sheet position adjusting means for moving said pallet on said pile board right and left in response to a detection signal from said first sensor means to adjust the position of the paper sheets,
• non-interrupting paper replenishing means comprising, a rod inserted under the bottom surface of said paper sheet pile through a groove of said pallet and loaded on said rod,
• a second sensor means for detecting insertion of said rod, and
• control means for interrupting operation of said paper sheet position adjusting means while said second sensor means is detecting insertion of said rod.

A feeder for a sheet-feed printing machine having a pallet on a pile board loaded with a paper sheet pile movable to the right and left in a direction lateral to the feed direction to feed paper sheets and for moving up said pile board to a printing unit through a side register lay, comprising;

• a threaded shaft extending in a direction lateral to the feed direction,
• a first sensor means along said threaded shaft in the lateral direction in response to rotation of said threaded shaft to detect a side edge of said paper sheet pile,
• a moving mechanism to move said first sensor means together with said threaded shaft in the lateral direction in an amount equal to the distance between a position at which said paper sheet pile is to be positioned when a left-pulling said register lay is used and a position at which said paper sheet pile is to be positioned when a right-pulling side register lay is used,
• a remaining paper sheet detecting sensor means for detecting reduction in amounts of remaining original paper sheets on said pile board,
• a pile top surface detecting sensor means for detecting, as said pile board loaded with a new paper sheet pile is moving up, the top surface of said new paper sheet pile reaching a predetermined position, and
• control means for controlling rotation of said threaded shaft so that, when said remaining paper sheet detecting sensor means detects a reduction in the amount of paper sheets, said first sensor means is separated from the side edge of said paper sheet pile and that, when said pile top surface detecting sensor means detects that the top surface of a new paper sheet pile reaches a predetermined position, said first sensor means is moved to a position where said first sensor means can detect the side edge of said paper sheet pile.