Patent ID: 7123341

Claim:
An image recording apparatus in which scanning exposure is performed to a sheet-like photosensitive material at an exposure position with light to record an image, the image recording apparatus comprising: a first feeding nip roller which is arranged on an upstream side of the exposure position in a feeding direction and attached while the first feeding nip roller is movable between a nip state and a nip released state, the first feeding nip roller feeding the photosensitive material; a first guide nip roller which is arranged between the exposure position and the first feeding nip roller and attached while the first guide nip roller is movable between the nip state and the nip released state, the first guide nip roller suppressing a rise of the photosensitive material; a second feeding nip roller which is arranged on a downstream side of the exposure position in the feeding direction and attached while the second feeding nip roller is movable between the nip state and the nip released state, the second feeding nip roller feeding the photosensitive material; a second guide nip roller which is arranged between the exposure position and the second feeding nip roller and attached while the second guide nip roller is movable between the nip state and the nip released state, the second guide nip roller suppressing the rise of the photosensitive material; and a drive controlling section which moves the first feeding nip roller, the first guide nip roller, the second feeding nip roller, or the second guide nip roller to the nip state and the nip released state, the drive controlling section setting ascent/descent speed W to a value determined from an equation of W=V×0.004/tan θ, where W is a maximum value of ascent/descent speed when the first feeding nip roller, the first guide nip roller, the second feeding nip roller, or the second guide nip roller comes into contact with the photosensitive material or separates from the photosensitive material, θ is an exposure angle, and V is exposure feeding linear speed.