Print medium handling system including cockle ribs to control pen-to-print medium spacing during printing
February 28, 2014. 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 3673960 3915281 Dot matrix impact printer having retractable platen Printer having swingable printing rings Paper feed mechanism with varying contact pressure Paper feed apparatus for typewriters or business machines having a paper levelling gap disposed in the paper guidance channel Printer comprising spring biased print head and roller platen Printer with drive on swinging platform Single sheet ink-jet printer with passive drying system Ink-set printhead-to-paper referencing system InventorsApplicationNo. 203152 filed on 02/28/1994US Classes:400/642, Including sheet guide (e.g., for sheet insertion, etc.)347/8, Of spacing between fluid ejector and receiving medium347/104, Physical handling400/646Sheet table at delivery side of platenExaminersPrimary: Burr, Edgar S.Assistant: Nguyen, Anthony H. International ClassB41J 013/14AbstractA printer mechanism to control pen-to-print medium spacing during printing is described. The preferred embodiment of the mechanism includes a printhead and an adjacent platen, the printhead and the platen defining a print zone therebetween. The platen includes ribs adapted for contacting a lower surface of the print medium such that the print medium bends downwardly between the ribs, thereby reducing uncontrolled bending of the print medium in the print zone. The ribs preferably extend parallel to a direction of travel of the print medium and may be positioned adjacent a transition zone, the transition zone facilitating a smooth transition of a leading edge of the print medium onto the ribs.Field of SearchIncluding sheet guide (e.g., for sheet insertion, etc.)Sheet table at delivery side of platen PLATEN OR PLATEN-MOVING MECHANISM Bar (i.e., line size) platen For feeding web record-medium By friction-feed means (e.g., reciprocating finger or gripper or pinch roller, etc.) SHEET OR WEB (E.G., RECORD-MEDIUM FEEDING MECHANISM) For feeding sheet from stack or pack holder Including web guiding or aligning (e.g., laterally, relative to print-line, etc.) INCLUDING ADJUSTMENT FOR OPTIMUM PRINTING PLANE Responsive to thickness of record-medium By adjustment of carriage (e.g, carriage-guide rollers) RECORD RECEIVERS AND/OR DRIVING MEANS THEREFOR Means to bow sheets during delivery With means to bow sheets | |
