Patent ID: 8911072

Claim:
A pre-applying liquid applying apparatus for an inkjet printer, comprising: an applying roller which applies a treatment agent onto a recording medium before an image is formed; a squeeze roller which abuts against the applying roller; and a treatment agent supplying unit which supplies the treatment agent to a nip portion of the applying roller and the squeeze roller, wherein a squeeze pressure adjusting mechanism is provided which adjusts an abutting force of the squeeze roller against the applying roller, and wherein the squeeze pressure adjusting mechanism includes a first oscillating arm which rotatably supports the squeeze roller at one end and which includes an oscillating supporting point inside the first oscillating arm; a second oscillating arm, one end of which is disposed close to another end of the first oscillating arm, and which second oscillating arm includes an oscillating supporting point inside he second oscillating arm; an extension spring which is installed between the one end of the second oscillating arm and the other end of the first oscillating arm; a cam member which is in contact with another end of the second oscillating arm; a motor which rotationally drives the cam member; and an angular sensor which detects an oscillating angle of the second oscillating arm.