| 摘要 |
A transfer roller apparatus for use for example in an electrographic copier including a dielectric member adapted to carry electrostatically developed marking particle images. The transfer roller apparatus employs a locating and tacking mechanism of simple construction which is capable of accurately locating a receiver member on the periphery of the transfer roller without damaging the dielectric member of the copier. Such apparatus includes a cylindrical roller to which an electrical bias is applied to establish a transfer field between the roller and the dielectric member to effect transfer of marking particle images from the dielectric member to a receiver member accurately located on the peripheral surface of the roller. A flexible member having a receiver member locating feature is associated with the roller. The flexible member is attached to the transfer roller such that the feature is normally in a first position extending above the peripheral surface of the roller for locating the receiver member on the peripheral surface, and is urged to a second position at least coincident with the peripheral surface to prevent damage to the dielectric member as the roller rotates to bring the flexible member in opposed relation to the dielectric member. The lead marginal edge of the a receiver member located by such locating mechanism is vacuum tacked to the peripheral surface.
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