Variable jogger for a sheet feeder
AssigneeWhite Consolidated Industries, Inc.
InventorRichard L. Volpe
Life of this patent
Estimating the term…
Abstract
A pair of colinearly movable, reciprocating paddles for bumping the side edges of sheets flowing serially along a feed path is disclosed. The sheets travel between the reciprocating paddles in a direction generally perpendicular to paddle movement. The paddles jog the sheets into a correct alignment position to establish registry between the sheets and, for example, the plate cylinder of an offset printing press supplied with the sheets. The distance between each paddle and the sheet feed path centerline can be adjusted during reciprocating movement of the paddle to meet registry requirements. A disengagement mechanism permits separate use of either paddle.
Claims10
A sheet jogger mechanism comprising:
- a pair of carriage support bars extending across a sheet feeding path lying between the ends of the pair of bars, each bar being rotatable on its longitudinal axis;
- a pair of paddle providing carriage members each carried on a respective one of the pair of bars, bidirectional rotation of the bars effecting movement of the carriage members back and forth along the bars;
- drive means engaging one end of the pair of bars to effect reciprocating movement of the bars back and forth along their longitudinal axes over a predetermined range of movement;
- and
- paddle positioning means engaging the other end of the pair of bars for rotating the bars to effect carriage movement along the bars while the bars are reciprocating back and forth along their longitudinal axes.
A sheet jogger mechanism comprising:
- a pair of carriage support bars extending generally parallel to each other along axes generally perpendicular to a sheet feeding path lying between the ends of the pair of bars, each bar being mounted for bidirectional rotation on and axial movement along a longitudinal axis, each rod having a threaded length portion;
- a pair of generally rotationally fixed carriage members, each carriage member threadingly engaging a respective one of the threaded length portions of the carriage support bars, rotation of each bar effecting movement of its respective carriage along its threaded length portion;
- cam follower means mounted at and engaging one end of the pair of bars;
- a movable cam member having cam surfaces for engaging the cam follower means, movement of the cam member effecting movement of the cam follower means, movement of the cam follower means effecting reciprocating linear movement of the rods back and forth along their longitudinal axes over a predetermined range of movement;
- and
- paddle position adjustment means located at the other end of the pair of rods for rotating the carriage support rods during their reciprocating movement to effect linear movement of the carriages along the threaded length portions of their respective reciprocating support rods.
Dependencies are inferred from the claim text.