Sheet stacking apparatus having positive control system for trailing sheet ends
Patent 4903956 Issued on February 27, 1990. Estimated Expiration Date: 
October 31, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 31, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2844373 3228273 3847388 Double bar separator for a sheet receiving tray Stripping and transfer roller assembly for sheet film processing Stack forming device Dispensing apparatus Method for trimming a signature held in a rotary clamp Envelope stacking arrangement for mail sorting machines Position control for a stacker wheel Patent #: 4638993 InventorsApplicationNo. 264724 filed on 10/31/1988US Classes:271/178, Rotating packer271/220With movable pack-limiting member(s) (e.g., hold-down)ExaminersPrimary: Schacher, Richard A.International ClassB65H 029/40AbstractA sheet stacking apparatus for receiving sheets from a printing or copying machine includes guide structure for directing output sheets onto an elevator platform and a selectively rotatable shaft having paddle arms disposed at a 108° interval. The shaft rotation is controlled so that the arms guide a sheet during stacker input and then rotates 360° to positively clear the sheet trail edge from the stacker input path. | |
