Preventing the Jamming of the Paper in a Printer Due to Buckling
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01
Paper, for example, in a continuous web, is advanced in the forward direction and in the reverse direction along a path through a printer formed with constrictions. When being advanced in the forward direction, the paper is pulled along the path by tractors formed with pins which engage in holes in the edges of the paper. When being advanced in the reverse direction, the paper is pulled by rubber rollers which pinch against an opposing set of idler rollers. The tractors must also reverse direction, and because tractors always feed positively, the pinch rollers must overdrive slightly, slipping against the paper so that the paper column is always in tension and never pushed by the tractors.