Patent ID: 9145011
Filing Date: 2015-09-29
Classification: B41J

Abstract:
1. A printing system, comprising: a printhead to eject ink onto a print medium in a print zone; a first roller pair adjacent to the print zone to advance a print medium into the print zone; a second roller pair upstream from the first roller pair, and driven by an independent motor, to advance the print medium to the first roller pair in a position control mode; a controller to cause the second roller pair to switch from the position control mode to a force control mode when a leading edge of the print medium reaches the first roller pair, wherein the second roller pair applies a substantially constant force to the print medium in the force control mode to push the leading edge of the print medium against the first roller pair with the substantially constant force while the first roller pair is stationary; and wherein the controller determines whether the print medium is a specialty print medium other than plain paper, and causes the second roller pair to switch to the force control mode only if the print medium is a specialty print medium.