Continuous form printer having multiple feed sensors and method
November 14, 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 Re34406 Web feed with incremental advance control for a printer Paper feeding control apparatus Recording apparatus with recording medium length sensors Precision paper transport system Printer supplies monitoring system Paper feeding apparatus for printer Electrophotographic printer using a continuous-form recording sheet Electrophotographic image forming apparatus having continuous form skew prevention Printing position adjustment mechanism for printer InventorsAssigneeApplicationNo. 339890 filed on 11/14/1994US Classes:400/582, Including programmed-control-system for record-medium feed (e.g., on auxiliary record)400/583, For web record-medium400/707By means driven from platen cylinderExaminersPrimary: Hilten, John S.Attorney, Agent or FirmInternational ClassB41J 011/42Foreign Application Priority Data1993-11-13 JPAbstractA continuous form printer is provided with two rotary encoders, corresponding to different paper feed intervals, and mounted coaxially on a drive shaft. The drive shaft drives a tractor for feeding the paper. The rotary encoders are read by photo-interruptor sensors, and the sensor signals are selected by a selector. The selector is able to select either one of the sensor signals generated by the encoders, or a signal formed by performing an AND operation on the two sensor signals. A controller controls a motor driving the drive shaft according to the selected signal, the selected signal corresponding to a chosen feeding interval. The controller is further able to precisely adjust the leading edge of the paper to a predetermined position based on the selected sensor signal, a known paper length, and a paper top sensor.Field of SearchIncluding programmed-control-system for record-medium feed (e.g., on auxiliary record)Including feed responsive to presence of sheet Including detector of record-medium For web record-medium Including aligning of sheet edge prior to typing For indicating position of line or end-of-page By means driven from platen cylinder | |
