Xerox Corporation

Russell L Phelps

Denis J Stemmle

Timothy M Minerd

Jeffrey L Sisson

Karl E Liechty

An apparatus in which a set of sheets is stapled together. A predetermined length of wire is fed to the stapler. A wire cutter is positioned along the wire as a function of the movement of the clamper clamping the sheets of the set. The wire cutter cuts the wire at the cutting position and a forming bar forms the cut wire into a staple. A driving bar then drives the staple through the set of sheets to staple the sheets together.

Stapling apparatus

A document transport system for a copier has associated with it a platen having anti-static properties. A platen glass surface is coated with an optically transmissive grounded coating which serves to dissipate electrostatic fields which occur as a consequence of the movement of the document across the platen surface. In one embodiment wherein the transport system includes rollers which frictionally engage and move the document across the platen, the conductive coating is omitted in areas generally underlying the rollers.

Platen having anti-static properties for use with a document transport

For a document sheet feeding and registration apparatus and method for deskewing and registering a document sheet relative to a registered copying position on a copier platen by feeding it against a sheet aligning document registration member, there is disclosed apparatus for initially feeding the document sheet towards the registration means with a first document sheet feeder exemplified by a widely transversely spaced pair of high friction sheet feeding rollers, which resist skewing of the document sheet, and removing the first document sheet feeder from the document sheet after its lead edge is engaged by a second document sheet feeder and before the document sheet engages the registration edge stop so that final skewing control of the document sheet is only by the second document sheet feeder, this second document sheet feeder being a single sheet feeding roller positioned centrally of the document sheet lead edge area and positioned closely adjacent the registration edge. This single roller provides a brief low rotational resistance deskewing of the document sheet while driving the document sheet into final alignment with the registration member. All of the sheet feeding rollers are positioned over the document on the platen extending through a backing plate so as to be hidden during copying.

Document deskewing system

In a document sheet feeding and registration apparatus for deskewing a document sheet relative to a desired copying position on a copier platen while feeding the document sheet onto the platen into said copying position, there is disclosed a method and apparatus including obtaining an electrical signal corresponding to the actual velocity of the document sheet being fed onto the platen, and actuating an automatic document sheet deskewing device at a precise actuating time occurring slightly before the document sheet reaches the copying position, so that the actuating time of said document sheet deskewing corresponds to the actual velocity of the document sheet. The electrical signal corresponding to the actual document sheet velocity may be obtained by counting the elapsed time between the actuation of first and second switches substantially spaced from one another along the document sheet path upstream of the copier platen. The actuating time of the document sheet deskewing device may be a resettable time delay count after the actuation of said second switch, which time delay count is resettable by a change in the counted time period between the actuation of said first and second switches. The automatic document sheet deskewing device may comprise a releaseable skew preventing document feeder releasing the document sheet at said actuating time to another feeder for briefly driving the document sheet into a registration aligning edge while freely allowing deskewing movement of the document sheet thereagainst after said actuating time.

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.

Growing community of inventors

Penfield, NY, United States of America

Russell L Phelps