Selector latch for a sheet feeder

A selector latch mechanism for a sheet feeder attachment to a printer, said printer including a motor driven platen, said mechanism receiving motive power from said platen and delivering motive power to a sheet stripper roller on said attachment, said mechanism comprising:

• a rotatable drive gear for receiving motive power from said platen;
• a drive pin carried by said drive gear and movable therewith in a generally circular motion, said drive pin being also movable in a generally radial direction relative to said drive gear about a pivot point on said drive gear;
• biasing means carried by said drive gear for urging said drive pin radially inwardly;
• a toothed driven gear connected to said sheet stripper roller for driving said roller, said driven gear being located for receiving said drive pin between its teeth when said drive pin is at its furthest radially inward position;
• and
• a selector disc having cam means and gate means integrally formed thereon for controlling the radial movement of said pin, said cam means comprising a major formation fixed to said selector disc so as to be immovable with respect thereto, said major formation having surfaces over which said pin moves, and said cam means further includes a pair of flexible web-like formations having radially outermost surfaces over which said pin moves, each of said web-like formations having one end fixed to said selector disc so as to be immovable with respect thereto, and an opposite unconstrained end biased toward said major formation, said unconstrained ends forming said gate means which provides an escapement path for said pin.