Printhead-carriage alignment and electrical interconnect...

Details Printhead-carriage alignment and electrical interconnect... Printhead-carriage alignment and electrical interconnect...

B - Operations, Transporting

41

J

101/96.022

B41J 25/34 (2006.01)

Patent

CA 1304983

PRINTHEAD-CARRIAGE ALIGNMENT AND ELECTRICAL INTERCONNECT LOCK-IN MECHANISM ABSTRACT OF THE DISCLOSURE A printhead cartridge and carriage assembly (10) is provided comprising: (a) a carriage (12); (b) a snap-spring (62) for securing a print- ing cartridge (14) in position on the carriage; and (c) an interconnect strip (16) for supplying electrical signals to the cartridge, including a force loading spring pad (24) for urging a portion of the interconnect strip against a portion of the cartridge. The cartridge has top (32), bottom (34), sides (36, 38), front (40) and rear (42) surfaces and in- cludes a printhead (44) on the bottom surface, an elec- trical contact strip (46) on the back surface connected to the printhead, referencing pads (56) on the side surfaces, and a lip (64) on the back surface for ac- cepting the snap-spring. Referencing surfaces (60) are provided for receiv- ing the referencing pads on the cartridge. The spring pad urges the interconnect strip against the electrical contact of the cartridge. The printhead cartridge/carriage assembly of the invention requires only one hand of the operator to both insert and lock the cartridge in position. Fur- ther, the cartridge/carriage assembly provides simul- taneous alignment of the printhead in the X, Y, and Z directions. Finally, contact between the printhead and the interconnect strip is reliably made each time the cartridge is inserted and locked in position, thereby ensuring proper nozzle firing each time.

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