Bi-directional record material feed apparatus

Claim 1

A record material feed apparatus for use with a printing machine of the type including a platen and drive means for rotating said platen about its longitudinal axis, said apparatus comprising: a frame capable of being attached to said printing machine adjacent the platen thereof; first and second drive shafts each rotatably mounted on said frame; first and second drive assemblies respectively mounted on said first and second drive shafts, each drive assembly including means for engaging a marginally punched record material loaded thereon and means for feeding said record material in response to the rotation of the respective drive shaft, said first drive assembly comprising at least one pin wheel feeding assembly and said second drive assembly comprising at least one tractor feed assembly; and a third drive assembly mounted to said frame and including means for engaging the platen drive means of said printing machine and means responsive to such engagement and the operation of said drive means for selectively rotating said first and second drive shafts in predetermined rotational directions, whereby said first and second drive assemblies are capable of respectively advancing said marginally punched record material in opposite directions, said third drive assembly comprising a gear train including a plurality of gears arranged in a closed loop, said plurality of gears including a first gear engageable with the drive means of said printing machine, a second gear mounted on said first drive shaft for driving said first drive shaft, a third gear mounted on said second drive shaft for driving said second drive shaft, and a fourth idler gear engaged between said first and second gears such that said first, second and fourth gears are aligned along their line of centers, said first and fourth gears being adjustable relative to said line of centers.