US5219159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Translating nip registration device
Assignee: Xerox Corp
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Filing: 1992-06-01
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Granted: 1993-06-15
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Expires: 2012-06-01
Abstract
Abstract An apparatus to bilaterally register and deskew sheets in an electrophotographic printing machine by driving the sheet against a pair of stalled drive rolls and then activating the drive rolls when the sheet is deskewed. The drive rolls are then laterally translated while the sheet is within the nips of the drive rolls. The proper side registration position of the sheet is sensed and stored and the sheet is brought to that proper registration position. Once the sheet has passed through the drive rolls, the rolls return to the center of the paper path to receive subsequent sheets. A stepper motor is used to translate the roll pairs in a lateral direction and the pulse counts are utilized to store the side registration and sheet acquisition positions thereby eliminating the need for a home position sensor or switch.
Inventors
- 👤 Michael A. Malachowski
- 👤 Jacob N. Kluger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:48
CPC Classifications
B; B65; B65H; B65H9/00; B65H9/002; B65H9/16; B65H2301/00; B65H2301/30; B65H2301/33; B65H2301/331; B65H2404/00; B65H2404/10; B65H2404/14; B65H2404/142; B65H2404/1424; B65H2404/16; B65H2404/161; B65H2511/00; B65H2511/50; B65H2511/51; B65H2511/514
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
110 words
An apparatus for advancing a sheet in a primary sheet feeding direction and for deskewing and side registering the sheet, comprising: means, located in a home position, for advancing the sheet in the primary sheet feeding direction, deskewing the sheet and translating the sheet in a direction substantially transverse to the primary sheet feeding direction; means for sensing the sheet, said advancing and translating means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration postion, said sensing means detecting the sheet in the side registration position; and means for storing the registration position.
Claim 2
Independent Claim
110 words
An apparatus for advancing a sheet in a primary sheet feeding direction and for deskewing and side registering the sheet, comprising: means, located in a home position, for advancing the sheet in the primary sheet feeding direction, deskewing the sheet and translating the sheet in a direction substantially transverse to the primary sheet feeding direction; means for sensing the sheet, said advancing and translating means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration postion, said sensing means detecting the sheet in the side registration position; and means for storing the registration position.
Claim 3
Dependent Claim
29 words
The apparatus according to claim 1, wherein said advancing means returns to the home position from the side registration position in response to said sensing means detecting the sheet.
Claim 4
Dependent Claim
42 words
The apparatus according to claim 2, wherein said advancing means comprises: a roll pair defining a drive nip; and means for translating said roll pair in a direction substantially parallel to the axis of rotation of a roll of said roll pair.
Claim 5
Dependent Claim
23 words
The apparatus according to claim 3, wherein said translating means moves said roll pair in response to a signal from said sensing means.
Claim 6
Dependent Claim
14 words
The apparatus according to claim 4, wherein said translating means comprises a stepper motor.
Claim 7
Dependent Claim
14 words
An apparatus according to claim 1, wherein said sensing means comprises an optical sensor.
Claim 8
Dependent Claim
43 words
The apparatus according to claim 2, further comprises means, responsive to a signal from said sensing means, for storing the home position of said advancing means and returning said advancing means to said stored home position after each sheet exits said advancing means.
Claim 9
Independent Claim
171 words
An apparatus for advancing a sheet in a primary sheet feeding direction and for deskewing and side registering the sheet, comprising: means, located in a home position, for advancing the sheet in the primary sheet feeding direction and deskewing the sheet including a roll pair defining a drive nip, and means for translating said roll pair in a direction substantially parallel to the axis of rotation of a roll of said roll pair; and means for sensing the sheet, said advancing means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position, wherein said translating means moves said roll pair in response to a signal from said sensing means and wherein said translating means further comprises a stepper motor, means for counting the steps of the stepper motor, and means for storing a particular count responsive to a signal from said sensing means.
Claim 10
Independent Claim
171 words
An apparatus for advancing a sheet in a primary sheet feeding direction and for deskewing and side registering the sheet, comprising: means, located in a home position, for advancing the sheet in the primary sheet feeding direction and deskewing the sheet including a roll pair defining a drive nip, and means for translating said roll pair in a direction substantially parallel to the axis of rotation of a roll of said roll pair; and means for sensing the sheet, said advancing means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position, wherein said translating means moves said roll pair in response to a signal from said sensing means and wherein said translating means further comprises a stepper motor, means for counting the steps of the stepper motor, and means for storing a particular count responsive to a signal from said sensing means.
Claim 11
Independent Claim
182 words
An apparatus for advancing a sheet in a primary sheet feeding direction and for deskewing and side registering the sheet, comprising: means, located in a home position, for advancing the sheet in the primary sheet feeding direction and deskewing the sheet; means for sensing the sheet, said advancing means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position wherein said advancing means returns to the home position from the side registration position in response to said sensing means detecting the sheet; and means, responsive to a signal from said sensing means, for storing the side registration position of said advancing means and returning said advancing means to said stored side registration position when said advancing means moves, from the home position to a position spaced from the side registration position wherein said advancing means returns to the home position from the side registration position in response to said sensing means detecting the sheet.
Claim 12
Independent Claim
182 words
An apparatus for advancing a sheet in a primary sheet feeding direction and for deskewing and side registering the sheet, comprising: means, located in a home position, for advancing the sheet in the primary sheet feeding direction and deskewing the sheet; means for sensing the sheet, said advancing means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position wherein said advancing means returns to the home position from the side registration position in response to said sensing means detecting the sheet; and means, responsive to a signal from said sensing means, for storing the side registration position of said advancing means and returning said advancing means to said stored side registration position when said advancing means moves, from the home position to a position spaced from the side registration position wherein said advancing means returns to the home position from the side registration position in response to said sensing means detecting the sheet.
Claim 13
Dependent Claim
118 words
An electrophotographic printing machine of the type in which a sheet is advanced in a primary sheet feeding direction and is deskewed and side registered, wherein the improvement comprises: means, located in a home position, for advancing the sheet in the primary sheet feeding direction, deskewing the sheet and translating the sheet in a direction substantially transverse to the primary sheet feeding direction; means for sensing the sheet, said advancing and translating means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position; and means for storing the registration position.
Claim 14
Dependent Claim
118 words
An electrophotographic printing machine of the type in which a sheet is advanced in a primary sheet feeding direction and is deskewed and side registered, wherein the improvement comprises: means, located in a home position, for advancing the sheet in the primary sheet feeding direction, deskewing the sheet and translating the sheet in a direction substantially transverse to the primary sheet feeding direction; means for sensing the sheet, said advancing and translating means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position; and means for storing the registration position.
Claim 15
Dependent Claim
30 words
The printing machine according to claim 10, wherein said advancing means returns to the home position from the side registration position in response to said sensing means detecting the sheet.
Claim 16
Dependent Claim
43 words
The printing machine according to claim 11, wherein said advancing means comprises: a roll pair defining a drive nip; and means for translating said roll pair in a direction substantially parallel to the axis of rotation of a roll of said roll pair.
Claim 17
Dependent Claim
24 words
The printing machine according to claim 12, wherein said translating means moves said roll pair in response to a signal from said sensing means.
Claim 18
Dependent Claim
15 words
The printing machine according to claim 13, wherein said translating means comprises a stepper motor.
Claim 19
Dependent Claim
15 words
A printing machine according to claim 10, wherein said sensing means comprises an optical sensor.
Claim 20
Dependent Claim
15 words
The printing machine of claim 10, wherein the sheet being advanced is a copy sheet.
Claim 21
Dependent Claim
15 words
The printing machine of claim 10, wherein the sheet being advanced is an original document.
Claim 22
Dependent Claim
179 words
An electrophotographic printing machine of the type in which a sheet is advanced in a primary sheet feeding direction and is deskewed and side registered, wherein the improvement comprises: means, located in a home position, for advancing the sheet in the primary sheet feeding direction and deskewing the sheet including a roll pair defining a drive nip, and means for translating said roll pair in a direction substantially parallel to the axis of rotation of a roll of said roll pair; and means for sensing the sheet, said advancing means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position, wheren said translating means moves said roll pair in response to a signal from said sensing means and wherein said translating means further comprises a stepper motor, means for counting the steps of the stepper motor, and means for storing a particular count responsive to a signal from said sensing means.
Claim 23
Dependent Claim
179 words
An electrophotographic printing machine of the type in which a sheet is advanced in a primary sheet feeding direction and is deskewed and side registered, wherein the improvement comprises: means, located in a home position, for advancing the sheet in the primary sheet feeding direction and deskewing the sheet including a roll pair defining a drive nip, and means for translating said roll pair in a direction substantially parallel to the axis of rotation of a roll of said roll pair; and means for sensing the sheet, said advancing means moving in unison with the deskewed sheet in a direction substantially transverse to the primary sheet feeding direction from the home position to a side registration position, said sensing means detecting the sheet in the side registration position, wheren said translating means moves said roll pair in response to a signal from said sensing means and wherein said translating means further comprises a stepper motor, means for counting the steps of the stepper motor, and means for storing a particular count responsive to a signal from said sensing means.
Claim 24
Dependent Claim
44 words
The printing machine according to claim 18, further comprises means, responsive to a signal from said sensing means, for storing the home position of said advancing means and returning said advancing means to said stored home position after each sheet exits said advancing means.
Claim 25
Dependent Claim
57 words
The printing machine according to claim 18, further comprises means, responsive to a signal from said sensing means, for storing the side registration position of said advancing means and returning said advancing means to said stored side registration position when said advancing means moves, from the home position to a position spaced from the side registration position.
Claim 26
Independent Claim
108 words
A method for deskewing and side registering a sheet in an electrophotographic printing machine comprising the steps of: advancing the sheet in the primary sheet feed direction until a portion of the sheet engages a non-operative roll pair so as to deskew the sheet; actuating the roll pair after deskewing the sheet to advance the sheet in the primary sheet feed direction; moving the roll pair in unison with the advancing sheet in a direction transverse to the primary sheet feed direction from a home position to a side registration position; and sensing the presence of the sheet in the side registration position; and storing the registration position.
Claim 27
Independent Claim
108 words
A method for deskewing and side registering a sheet in an electrophotographic printing machine comprising the steps of: advancing the sheet in the primary sheet feed direction until a portion of the sheet engages a non-operative roll pair so as to deskew the sheet; actuating the roll pair after deskewing the sheet to advance the sheet in the primary sheet feed direction; moving the roll pair in unison with the advancing sheet in a direction transverse to the primary sheet feed direction from a home position to a side registration position; and sensing the presence of the sheet in the side registration position; and storing the registration position.
Claim 28
Dependent Claim
31 words
The method of claim 21, further comprising storing the home position of said roll pair and returning said roll pair to the stored home position after each sheet exits roll pair.
Claim 29
Independent Claim
167 words
A method for deskewing and side registering a sheet in an electrophotographic printing machine comprising the steps of: advancing the sheet in the primary sheet feed direction until a portion of the sheet engages a non-operative roll pair so as to deskew the sheet; actuating the roll pair after deskewing the sheet to advance the sheet in the primary sheet feed direction; moving the roll pair in unison with the advancing sheet in a direction transverse to the primary sheet feed direction from a home position to a side registration position; sensing the presence of the sheet in the side registration position; storing the home position of said roll pair and returning said roll pair to the stored home position after each sheet exits roll pair; and storing the sensed proper side registration position of said roll pair and returning said roll pair to the stored side registration position when said roll pair moves, from the home position to a position spaced from the side registration position.
Claim 30
Independent Claim
167 words
A method for deskewing and side registering a sheet in an electrophotographic printing machine comprising the steps of: advancing the sheet in the primary sheet feed direction until a portion of the sheet engages a non-operative roll pair so as to deskew the sheet; actuating the roll pair after deskewing the sheet to advance the sheet in the primary sheet feed direction; moving the roll pair in unison with the advancing sheet in a direction transverse to the primary sheet feed direction from a home position to a side registration position; sensing the presence of the sheet in the side registration position; storing the home position of said roll pair and returning said roll pair to the stored home position after each sheet exits roll pair; and storing the sensed proper side registration position of said roll pair and returning said roll pair to the stored side registration position when said roll pair moves, from the home position to a position spaced from the side registration position.
References Cited (Backward Citations)
US4480825A
Cited
US4685664A
Cited
US4453659A
Cited
US4500045A
Cited
JPS6481741A
Cited
US4805892A
Cited
JPH02198952A
Cited
US5094442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |