[특허]Sheet registration and deskewing system with independent drives and steering

[미국특허] Sheet registration and deskewing system with independent drives and steering 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G07F-011/16
출원번호	US-0229800 (2002-08-28)
발명자 / 주소	Hwang, Shyshung S.
출원인 / 주소	Xerox Corporation
대리인 / 주소	Perman & Green, LLP
인용정보	피인용 횟수 : 18 인용 특허 : 9

초록 ▼

An apparatus for calibrating a sheet registering and deskewing device, comprising a plurality of sensors, located along a paper path, to sense a position of a sheet in the paper path at a first position and a second position, and to generate a signal indicative thereof, a pair of independent separately driven drive nips with steering mechanisms located in the paper path for forwarding the sheet from the first position to the second position and a controller, to receive signals from the said plurality of sensors and to generate motor control drive signals for the said pair of independent separately driven drive nips and steering mechanisms so as to induce a corrective action in the movement of the sheet from the first position to the second position in the paper path and to repeat the corrective action until a predetermined position is obtained.

대표청구항 ▼

1. A sheet registration and deskewing steering system with independent drives and steering comprising; a paper path for a sheet; a steerable drive mechanism for transporting the sheet along the paper path while imparting a lateral motion to the sheet as it is transported along the paper path; a sensing system for detecting the skew and lateral position of the sheet including a sensor located along the paper path; a first edge sensor, located along an edge of the paper path; and a second edge sensor located along the edge of the paper path in substantially the same lateral position as the first edge sensor; a pair of independently, separately driven first and second nips located subsequent to the steerable drive mechanism along the paper path; and a controller connected to the pair of independent and separately driven first and second nips and responsive to a signal from the second sensor for generating first and second drive signals for registering a sheet in the paper path. 2. A sheet registration and deskewing system according to claim 1 wherein the first and second independent and separately driven nips are each rotatable about an axis substantially perpendicular to a plane formed by the paper path and wherein the controller provides separate first and second drive signals to the first and second independent and separately driven nips in response to the second sensor for separately rotating the first and second independent and separately driven nips about the axis. 3. A sheet registration and deskewing system according to claim 2 wherein the first and second independent and separately driven nips each include a motor connected to the controller, an arm and yoke mechanism connected to the motor and a roll rotatably connected to the arm and yoke mechanism. 4. A sheet registration and deskewing according to claim 2 wherein said first and second independent and separately driven nips impose velocities V1and V2respectively to produce a skew angle θ to the sheet for steering and registering the sheet having an initial skew angle of θowherein the relationship between the velocities V1and V2is expressed as where φ1and φ2are the angle of steering and L is the distance between the first and second separately driven nips, and wherein 5. A sheet registration and deskewing according to claim 2 wherein said first and second independent and separately driven nips impose velocities V1and V2respectively to produce a a skew angle θ to the sheet for steering and registering the sheet having an initial skew angle of θowherein the relationship between the velocities V1and V2is expressed as wherein V1x, V2x are x-direction components, V1y, V2y are y-direction components and Nip Spacing in L. 6. The sheet registration and deskewing system of claim 2, wherein said separate rotations of said first and second nips about said axis are at different respective angles of rotation which will avoid buckling of said sheet while imparting said lateral motion to said sheet.

이 특허에 인용된 특허 (9) 인용/피인용 타임라인 분석

Alan G. Schlageter, Active pre-registration system using long sheet transports.
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Milillo William D., Adaptive electronic registration system.
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Thiemann Peter,DEX ; Olbrich Otto,DEX ; Hajdukiewicz Stefan,DEX ; Boehmer Georg,DEX, Aligning device.
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Williams Lloyd A. ; deJong Joannes N. M. ; Wolf Barry M., Calibration method and system for sheet registration and deskewing.
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Kamprath David R. (Webster NY) Hoover Martin E. (Rochester NY), Differential drive for sheet registration drive rolls with skew detection.
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Williams Lloyd A. (Mahopac NY) deJong Joannes N. M. (Suffern NY), Lateral sheet pre-registration device.
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Lawrence R. Benedict ; Joannes N. M. DeJong ; Vittorio R. Castelli ; Lloyd A. Williams ; Vincent M. Williams, Printing systems and methods.
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Wolf Barry M. ; deJong Joannes N. M. ; Williams Lloyd A. ; Savino Michael J., Process, lateral and skew sheet positioning apparatus and method.
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Suga Takeshi,JPX ; Watanabe Masao,JPX ; Mori Akihito,JPX ; Kodama Hirokazu,JPX, Sheet conveying apparatus.
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이 특허를 인용한 특허 (18) 인용/피인용 타임라인 분석

Tharayil, Marina L., Adjustable idler rollers for lateral registration.
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Repetyuk, Dmytro; Androsyuk, Sergiy; Khvostov, Vitold; Davydovskiy, Roman, Banknote alignment system for banknote validator.
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Elliot, Jack Gaynor, Gain-scheduled feedback document handling control system.
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Elliot, Jack Gaynor, Gain-scheduled feedback document handling control system.
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Kawabata, Shinichi; Kawanago, Yusuke; Okubo, Takahiro, Image forming apparatus with registration rollers configured to reset the lateral position of a sheet.
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Kawabata, Shinichi; Kawanago, Yusuke; Okubo, Takahiro, Image forming apparatus with rollers configured to reset the lateral position of a sheet.
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Storey, Matthew M; Ledgerwood, Adam D; Moore, Aaron M; Bryl, Derek A, Media rotation and translation apparatus.
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Koo, Kun Hyung, Medium transferring apparatus and financial device.
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Pasuch, Michael; Frank, Hendrik; Grandt, Helge, Method and apparatus for correcting the lateral position of a printing material, printing material conveying system and machine processing printing material.
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Mandel, Barry Paul; deJong, Joannes N. M.; Williams, Lloyd A., Method and system for skew and lateral offset adjustment.
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Kawamura, Shigemi; Hiramitu, Naruaki, Paper-like materials processing apparatus.
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DeGruchy, Paul J.; Bober, Henry T.; Zhang, Xinzhong, Pre-registration apparatus.
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Suga,Takeshi; Inoue,Hiroshige, Sheet conveying apparatus and image forming apparatus.
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Suga,Takeshi; Takagi,Masafumi, Sheet conveying apparatus, image forming apparatus and image reading apparatus.
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Inoue, Hiroshige, Sheet conveying apparatus, image forming apparatus, and image scanning apparatus.
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deJong, Joannes N. M.; Williams, Lloyd A.; Prabhat, Saurabh, Sheet registration for a printmaking device using trail edge sensors.
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Williams, Lloyd A.; deJong, Joannes N. M., Sheet registration using edge sensors.
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Hozumi, Shinji, Sheet transport apparatus and image formation apparatus therewith.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

[미국특허] Sheet registration and deskewing system with independent drives and steering 원문보기

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이 특허에 인용된 특허 (9) 인용/피인용 타임라인 분석

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[미국특허] Sheet registration and deskewing system with independent drives and steering 원문보기

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