Printing apparatus a correction ribbon

Claim 1

A printing apparatus using a printing ribbon and a correction ribbon, said apparatus comprising a platen; a carriage which is movable along said platen; a holder for supporting said printing ribbon and said correction ribbon in normally held respective rest positions and for moving said printing ribbon and said correction ribbon swingably to a print position, said holder being swingably mounted on said carriage; a first lever having a first end, a second end and an intermediate part, said first lever being pivotally supported about a pivot point at said intermediate part on said carriage so as to be swingable between a normally held first position and a second position; a first electromagnet disposed in attracting relation to said first end of said first lever for shifting said first lever from said first position to said second position by rotating said first lever about said pivot point, and for holding said first lever at said second position; a second lever having a first end, a second end, and an intermediate part, said second lever being pivotally supported on said second end of said first lever so as to be swingable between a normally held resting position and a working position, and wherein said second end of said second lever has a closed slot therein; a second electromagnet having a plunger and a pin holding means thereon, said second electromagnet being disposed to have said pin holding means connected rotatably to said closed slot of said second lever for shifting said second lever from said resting position to said working position and holding said second lever at said working position; coupling means movably coupling said first end of said second lever to said holder, said coupling means comprising a first pin supported on said second lever, and said holder having formed therein a first slot having cam surface and being shaped to cooperate with said first pin; and said coupling means operating on said holder for holding said holder positioned at any desired position by movement of said second lever; wherein to select and move said printing ribbon from said rest position to said print position, said first electromagnet is actuated to said first lever from said first position to said second position so that said holder is caused to swing through said second lever, thereby to move said printing ribbon from its rest position to said print position whereat said coupling acting through said second lever on said holder holds said printing ribbon at said print position; and wherein to select and move said correction ribbon from said rest position to said print position, said first electromagnet is actuated to shift said first lever from said first position to said second position and said electromagnet is concurrently actuated to shift said second lever from said resting position to said working position, thereby to move said holder to swingably move said correction ribbon from its rest position to said print position whereat said coupling means acting through said second lever on said holder holds said correction ribbon at said print position.