Ribbon cartridge for dual automatic typewriter function

Claim 2

A cartridge for a typewriter, which typewriter includes means for receiving the cartridge and operational means to perform a typewriter function for causing the alignment of a selected platen impact point relative to the typewriter print point, the cartridge comprising: means disposed on the cartridge for actuating the typewriter operational means to thereby perform the typewriter function upon insertion and again upon removal of the cartridge.

Claim 3

A cartridge as defined in claim 1 wherein said actuating means includes an abutment carried by the cartridge.

Claim 4

A cartridge as defined in claim 2 wherein said abutment is in the path of said operational means for actuating the typewriter function upon insertion and removal of the cartridge.

Claim 5

An automatic backspacing ribbon cartridge for a typewriter having a traversable carriage, a fixed ribbon cartridge platform for supporting and guiding the ribbon cartridge to the typewriter print station when the ribbon cartridge is inserted into the typewriter; an actuating mechanism pivotally supported on the ribbon cartridge platform, and a backspace mechanism responsive to the actuating mechanism for incrementally reversing the forward traverse of the carriage, the ribbon cartridge comprising: an abutment on the ribbon cartridge, the abutment including a plurality of camming surfaces for engaging the actuating mechanism for actuating the typewriter backspace mechanism when the ribbon cartridge is inserted into and removed from the typewriter.

Claim 6

An automatic backspacing ribbon cartridge for a typewriter having a traversable carriage, a fixed ribbon cartridge platform for supporting and guiding the ribbon cartridge to the typewriter print station when the ribbon cartridge is inserted into the typewriter; an actuating mechanism pivotally supported on the ribbon cartridge platform, and a backspace mechanism responsive to the actuating mechanism for incrementally reversing the forward traverse of the carriage, the ribbon cartridge comprising: an abutment on the ribbon cartridge, the abutment including a plurality of camming surfaces for engaging the actuating mechanism for actuating the typewriter backspace mechanism when the ribbon cartridge is inserted into and removed from the typewriter.

Claim 7

An automatic backspacing ribbon cartridge as defined in claim 4 wherein said abutment includes a first cam surface for actuating the backspace mechanism when the ribbon cartridge is inserted into the typewriter and a second cam surface for actuating the backspace mechanism when the ribbon cartridge is removed from the typewriter.

Claim 8

An automatic backspacing ribbon cartridge as defined in claim 5 wherein said abutment is carried by the ribbon cartridge in a substantially vertical orientation and wherein said first and second cam surfaces are disposed on the lowermost portion of said abutment.

Claim 9

An automatic backspacing ribbon cartridge as defined in claim 6 wherein said abutment projects from a housing wall of the ribbon cartridge.

Claim 10

An automatic backspacing ribbon cartridge as defined in claim 6 wherein said first and second surfaces are sloped opposite one another for bidirectional actuating of said backspace mechanism.