Patent ID: 7434901

Claim:
An apparatus for adjusting a spacing between a printhead in a printer and a print medium advanced through the printer, wherein the printhead is mounted in a carriage which is movable along a guiding rod, the apparatus comprising: a first assembly for adjusting a position of a first portion of the carriage; and a second assembly for adjusting a position of a second portion of the carriage, wherein the second assembly comprises: a camshaft attached to the carriage and is movable with respect thereto; at least one cam attached to the camshaft, the cam having a predefined profile; a bushing member having a first member which abuts the predefined profile of the cam and a second member which abuts the guiding rod; an activation pin near a first end on the guiding rod; a pin engaging means at the first end of the camshaft for engaging the activation pin; and a connecting plate attached between the first end of the camshaft and the pin engaging means, the pin engaging means is rotatable with respect to the connecting plate, wherein the moving of the camshaft with respect to the carriage causes a distance between the bushing member and the camshaft to vary according to the predefined profile of the cam, thereby adjusting the spacing between the printhead and the print medium.