centerless ground carriage support rods the slider bar also has a plurality of dual edge paper pinch wheels supported thereon which are biased into engagement with the paper or other medium on which printing takes place by a plurality of springs integrally formed from a single member affixed to the slider bar application_number US 5663993 A description as seen in fig1 and 2 the printer 2 includes a print head carriage 10 mounted in a printer housing or chassis 4 for sliding movement on a slider rod 6 and a slider bar 8 which each extend transversely of the path of movement of the paper or other printing medium through the printer in the embodiment shown the carriage 10 is supported on the slider rod 6 by two laterally spaced bushings in the lower rear portion of the carriage and by a single front slider support fig2 shows a perspective view from the bottom front of the printer carriage 10 which is particularly useful in an ink jet printer which uses a plurality of ink cartridges ordinarily four ink cartridges are provided comprising the color black and three primary colors for color ink jet printing the carriage comprises a molded plastic member comprised of five generally l shaped parallel spaced plates 12 14 16 18 20 which define four printer cartridge receptacles.