Patent ID: 7470072

Claim:
A platen gap adjustment assembly for adjusting the spacing between a platen and a print head in a printing apparatus that prints to a print medium comprising: a carriage movably supported on a frame having spaced apart opposing sides with a first mounting hole disposed on one side of the frame and a second mounting hole symmetrically disposed on the opposite side of the frame; a first mounting member adapted to fit into said first mounting hole for forming a first shaft hole; a second mounting member adapted to fit into said second mounting hole for forming a second shaft hole; a guide shaft extending between said first shaft hole and said second shaft hole for slidably supporting bidirectional movement of said carriage between said opposing sides of the frame, with said carriage carrying said print head; wherein said first shaft hole is formed by said first mounting member to render said first shaft hole eccentric to said guide shaft and to enable the first mounting member to rotate around the guide shaft with said first mounting member having first positioning engagement part(s) for positioning said first mounting member into a selected fixed position relative to one side of said frame; wherein said second shaft hole is formed by said second mounting member to render said second shaft hole eccentric to said guide shaft and to enable the second mounting member to rotate around the guide shaft with said second mounting member having second positioning engagement part(s) for positioning said second mounting member into a selected fixed position relative to the opposite side of said frame; and an urging member for urging the first and/or second positioning engagement part(s) into engagement with the frame on either or both sides respectively.