Paper feed mechanism with varying contact pressure
Patent 4537521 Issued on August 27, 1985. Estimated Expiration Date: 
October 26, 2003. 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 26, 2003. 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 784366 1371909 1401103 2007360 Self aligning paper feed roller assembly Paper feeding apparatus Paper feed roller assembly for a typewriter or printer Patent #: 4364683 InventorsAssigneeApplicationNo. 06/545812 filed on 10/26/1983US Classes:400/637.6, Mounted on single carrier having pivot intermediate front and rear lower feed-rollers400/637Including lower feed-roller(s) (e.g., pressure roller, etc.)ExaminersPrimary: Burr, Edgar S.Assistant: McDaniel, James R. Attorney, Agent or FirmInternational ClassB41J 13/036 (20060101)Foreign Application Priority Data1982-11-05 DEAbstractThe paper transport shaft of a paper feed mechanism is movably mounted on an arm of a frame-supported spring wire lever. Another arm of the spring wire lever is pivotably mounted and may be set to flex the body of the spring wire lever through a pivot lever. Depending on the pivoting of the pivot lever the contact pressure between a paper pressure roller mounted on the paper transport shaft and a platen is varied. Selectively, the paper transport shaft can be pivoted away from the platen to allow adjustment of the paper inserted in the paper feed mechanism.Other References
Field of SearchIncluding feed-roller having equalizing or pressure-adjusting meansIncluding friction-feed means (e.g., band) By roller couple (e.g., rotatable pinch rollers, etc.) Including lower feed-roller(s) (e.g., pressure roller, etc.) Including single carrier pivot intermediate front and rear lower feed rollers Mounted on single carrier having pivot intermediate front and rear lower feed-rollers Including feed or pressure roller mounted on "paper-finger" SHEET OR WEB (E.G., RECORD-MEDIUM FEEDING MECHANISM) | |
