Continuous ink jet printhead having two-dimensional nozzle array and method of redundant printing

A method of redundant printing comprising:

• forming a first row of drops travelling along a first path, some of the drops having a first volume, some of the drops having a second volume;
• forming a second row of drops travelling along a second path, some of the drops having a first volume, some of the drops having a second volume;
• causing the drops having the first volume from the first and second rows of drops to diverge from the first and second paths;
• causing the drops having the second volume from the first row of drops to impinge on predetermined areas on the receiver;
• and
• causing the drops having the second volume from the second row of drops to impinge the predetermined areas on the receiver.

A method of redundant printing comprising:

• forming a first row of drops travelling along a first path, some of the drops having a first volume, some of the drops having a second volume;
• forming a second row of drops travelling along a second path, some of the drops having a first volume, some of the drops having a second volume;
• causing the drops having the first volume from the first and second rows of drops to diverge from the first and second paths;
• causing the drops having the second volume from the first row of drops to impinge on predetermined areas on the receiver;
• causing the drops having the second volume from the second row of drops to impinge on the predetermined areas on the receiver;
• and
• detecting an event, wherein detecting the event includes selectively determining to print a second line of drops displaced from the first line of drops omitting predetermined individual drops.

A method of redundant printing comprising:

• forming a first row of drops travelling along a first path, some of the drops having a first volume, some of the drops having a second volume;
• forming a second row of drops travelling along a second path, some of the drops having a first volume, some of the drops having a second volume;
• causing the drops having the first volume from the first and second rows of drops to diverge from the first and second paths;
• causing the drops having the second volume from the first row of drops to impinge on predetermined areas on the receiver;
• causing the drops having the second volume from the second row of drops to impinge on the predetermined areas on the receiver;
• and
• detecting an event, wherein detecting the event includes waiting a predetermined amount of time such that the drops having the second volume from the first row of drops are at least partially absorbed by the receiver.

A continuous inkjet printing apparatus comprising:

• a printhead having a two-dimensional nozzle array, said two-dimensional nozzle array having a first nozzle row being disposed in a first direction and a second nozzle row being disposed displaced in a second direction and aligned in the first direction relative to said first nozzle row;
• a drop forming mechanism positioned relative to said first nozzle row and said second nozzle row, said drop forming mechanism being operable in a first state to form drops from said first nozzle row having a first volume travelling along a first path and in a second state to form drops having a second volume travelling along said first path, said drop forming mechanism also being operable in a first state to form drops from said second nozzle row having a first volume travelling along a second path and in a second state to form drops having a second volume travelling along said second path;
• and
• a system which applies force to said drops travelling along said first path and said second path, said force being applied in a direction such that said drops having said first volume diverge from said first path and said second path.