Electro-mechanical marking device

An electro-mechanical marking device, for use with a machine having a frame and a stack sheet feed assembly for which individual sheets are removed intermittently in succession to subsequently have the machine perform an insignia applying operation thereon, said machine further including a driven circular element that rotates as each of the individual sheets is removed from the stack sheet feed, said marking device including in combination:

• a housing having an open lower end and a pair of slide guide means fixedly mounted to said housing at the open end thereof, each of said slide guide means being positioned on opposite sides of said housing and extending below said housing,
• fastening means engageable with said housing for adjustably mounting the marking device to the machine above the stack sheet feed assembly, such that said slide guide means is positioned adjacent the uppermost sheet in the stack sheet feed assembly,
• drive element means slidably supported from said housing,
• electro-mechanical means mounted in said housing and engageable with said drive element to move the same from an at rest position to an extended actuated position,
• interchangeable marking head means adapted to be loosely mounted to and received by said slide guide means in said open end of said housing and mounted to be engaged by said drive means, said marking head means having foot element means mounted thereon, such that upon the energization of said electro-mechanical means, said drive element means, said marking head means and said foot element means are moved from an at rest position to an extended actuating position whereby said foot element means engages the stack sheet feed and marking head means engages the upper-most sheet on the stack sheet feed to mark the same.