Printing media feed and retaining apparatus for a thermal inkjet printer/plotter

A printing media feed and retaining apparatus for a computer driven primer/plotter comprising:

• a) a pinch roller support member having an arcuate media guide surface thereon, said arcuate media guide surface having an axis of generation, said support member being moveable into and out of a pinching position adjacent a platen roller;
• b) said pinch roller support member having at least three pinch rollers freely rotatably mounted on said print roller support member on at least two spaced parallel roller axes;
• and
• c) said pinch roller support member having a support and actuation arm extending therefrom on a side opposite said arcuate media guide surface, said arm having a central axis and said arm being positioned with respect to the pinch rollers so that said central axis intersects a centerline through a point substantially in the middle of a polygon figure defined by lines connecting the pinch rollers and having one each of said pinch rollers at intersections of the sides of said polygon figure.