Copier registration method and apparatus
AssigneeXerox Corporation
InventorRussell L. Phelps
Life of this patent
Estimating the term…
Abstract
In a copier, a recirculating document handler having a corner registering mechanism for precisely positioning a document on a platen prior to imaging. The document is initially driven onto the platen and then corner registered against two mutually orthogonal edge guides by a dual paddle wheel drive mechanism. A clamp plate mounted above the platen is then lowered to flaten the document against the platen thereby insuring it is imaged in the copier's depth of field. Once the document is imaged it is side shifted away from one of the edge guides and driven from the platen and stacked in a copier stacking tray. This process of registering, clamping, and removing is repeated for successive documents rapidly enough to have a document throughput of greater than one per second.
Claims13
Apparatus for repetitively registering successive document sheets above a copier platen comprising:
- (a) drive means for driving said sheets across said platen;
- (b) means for disengaging said drive means to allow two dimensional registration of a particular sheet with respect to said platen;
- (c) means for driving said sheet into registration along two orthogonal registration positions;
- and
- (d) means for shifting said sheet away from one of said registration positions before said drive means is re-engaged to drive said sheet off said platen.
A mechanism for repetitively registering successive document sheets above a copier platen comprising:
- (a) drive means for driving said sheets across said platen;
- (b) means for disengaging said drive means to allow two dimensional registration of a particular sheet with respect to said platen;
- (c) means for driving said sheet against registration guides positioned along two mutually perpendicular platen edges to achieve said two dimensional registration;
- and
- (d) means for moving the drive means into engagement with said registered sheet for both shifting said sheet away from one of said registration guides and for driving said sheet off said platen.
A process for two dimensional registering a series of successive document originals above a transparent copier platen comprising the steps of:
- (a) driving a document onto said platen with a drive roller;
- (b) disengaging said drive roller from said document;
- (c) driving said document into corner registration on said platen;
- (d) contacting said corner registered document with said drive roller;
- (e) shifting said drive roller along a direction parallel to an axis of drive roller rotation to re-position said document in relation to said platen;
- (f) driving said document from said platen;
- and
- (g) repeating steps a-f for successive documents.
In a copier, a process comprising the steps of moving a document original along an input path to a platen for copying, stopping said document at an initial position on said platen, repositioning said document on said platen to a registration position so that an image of said original will be properly aligned on said copier photoreceptor, clamping said original to said platen to insure said document is within a copier imaging depth of field, transmitting said image to said photoreceptor, jogging said document away from said registration position, and removing said document from said document from said platen along an exit path.
Dependencies are inferred from the claim text.