| 摘要 |
<p>A printing apparatus has a removable developing unit including a casing (118), for holding developer powder, and a developing roller (102) for use in developing an electrostatic latent image, formed on an image support member (101) of the apparatus, by transferring developer powder to the latent image, the said image support member (101) being supported at opposite ends thereof in the apparatus by first and second holding members (109, 110). First and second locating members (116, 117), secured respectively to the said holding members (109, 110), are provided with respective grooves (116a, 117a), for receiving respectively first and second mounting members (115, 114A) disposed at opposite axial ends of the developing roller (102) such that a desired operative positioning of the developing roller (102) in the apparatus can be achieved by inserting the said first and second mounting members (115, 114A) into the said grooves (116a, 117a) at respective first ends thereof and moving those mounting members (115, 114A) along the grooves (116a, 117a) into engagement with abutment portions (116b, 117b) at respective opposite ends of those grooves (116a, 117a). Since the shaft of the developing roller (102) is itself used to locate the developing unit with respect to the image support member (101), the error in the gap between the developing roller (102) and image support member (101) can be reduced, and/or fitting tolerances relaxed, as compared with prior art printing apparatus.</p> |
