Abstract: A printer assembly for printing on a supply of media traveling in a media direction. The printer generally includes a platen assembly, a print head assembly and a pivot member. The pivot member provides for pivoting of the print head assembly relative to the platen assembly to adjust for variations in the media as it passes therebetween. Advantageously, the pivot member may be supported directly by the platen assembly, such as by bearing supports of the platen assembly, to reduce positioning error from intervening components. Preferably, the pivot member is positioned upstream of the print head assembly. Also, a pair of pivot members may each be supported at the ends of an angulation arm which is coupled to the print head assembly for angulation in the media direction but is uncoupled in the cross-media direction.

Abstract: One embodiment of the invention is a notch finding mechanism that at least partially supports and drives a core carrying printer media. The notch finding mechanism includes a notch finding spring and a plurality of support posts that extend from a support disk. The notch finding spring includes a plurality of fingers constructed of a flexible sheet material, and the fingers are positioned circumferentially and adjacent each other to define a plurality of spaces between the fingers. In addition, the fingers are biased radially outwardly, and each of the fingers has a free end that has a width that is approximately matched to a width of a notch in an end of the core. The bias of one of the fingers urges the free end of the finger into the notch aligned with the finger when the core is placed over the fingers and is rotated a small amount.