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    • 8. 发明授权
    • Fine-pitch paper adjustment guide for image forming devices
    • 用于成像装置的细间距纸调节指南
    • US5931456A
    • 1999-08-03
    • US926191
    • 1997-09-09
    • Anthony G. Laidlaw
    • Anthony G. Laidlaw
    • B41J13/00B65H1/04G03G15/00B65H1/00B65H31/20
    • B65H1/04B65H2402/32B65H2402/5151B65H2511/10B65H2511/20
    • The invention includes an adjustable media tray for an image forming device such as a printer, copier or facsimile machine. The media tray incorporates a media guide which is slidably mounted on the tray. The media tray and associated guide incorporate a releasable locking mechanism which, when engaged, permits the guide to be slidably moved in one direction, but prevents the guide from being slidably moved in the opposite direction. The locking mechanism incorporates a plurality of pawls and at least one ratchet rack with equally-spaced, ramp-shaped teeth. Each of the teeth has a vertical edge. Each of the pawls has associated therewith a plurality of teeth of a single rack, and each of the pawls is adapted to sequentially engage a vertical edge of each of its associated plurality of teeth. Engagement of each pawl with the vertical edge of each of its associated plurality of teeth is out of phase with engagement of each other pawl with the vertical edge of each of its associated plurality of teeth. The out-of-phase arrangement is provided either with multiple, offset pawls which operate on the evenly-spaced teeth of a single linear ratchet rack, or with multiple offset racks, each of which has associated therewith a pawl. In either case, the amount of offset between the pawls of the former arrangement or the racks of the latter arrangement is equal to the period, or distance, between teeth, divided by the number of racks or pawls.
    • 本发明包括用于诸如打印机,复印机或传真机的图像形成装置的可调节介质托盘。 介质托盘包括可滑动地安装在托盘上的介质导向件。 介质托盘和相关引导件包括可释放的锁定机构,当被接合时,允许引导件沿一个方向可滑动地移动,但是防止引导件沿相反方向可滑动地移动。 锁定机构包括多个棘爪和至少一个具有等间隔的斜坡齿的棘齿架。 每个齿都有一个垂直的边缘。 每个棘爪具有与其相连的单个齿条的多个齿,并且每个棘爪适于顺序地接合其相关联的多个齿的每个的垂直边缘。 每个棘爪与其相关联的多个齿的每个的垂直边缘的接合与每个其它棘爪与其相关联的多个齿的每个的垂直边缘的接合不相位。 异相装置提供有多个偏移爪,其操作在单个线性棘轮架的均匀间隔的齿上,或者具有多个偏移齿条,每个偏移齿条与其相关联。 在任一种情况下,前一种装置的棘爪或后者装置的支架之间的偏移量等于齿之间的周期或距离,除以齿条或棘爪的数量。