Patent US5802422A successfully refreshed from Google Patents.
US5802422A
Expired / Lapsed
US
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Image forming device
Assignee: Fujifilm Business Innovation Corp
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Filing: 1997-07-02
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Granted: 1998-09-01
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Expires: 2017-07-02
Abstract
Abstract An image forming device detects a standard pattern transferred to a transfer belt by an image carrier. The standard pattern is transferred onto the transfer belt at an image transfer position and detected at a standard pattern detection position. The distance between the image transfer position and the standard pattern detection position is a non-integer-multiple of the distance which the transfer belt is moved by one rotation of the image belt drive roll.
Inventors
- 👤 Norio Hokari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:59
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5054; G03G15/5058; G03G15/01; G03G15/0142; G03G15/0178; G03G15/0194; G03G15/14; G03G15/16; G03G15/1605; G03G15/1615; G03G2215/00; G03G2215/00025; G03G2215/00029; G03G2215/00033; G03G2215/00037; G03G2215/00042; G03G2215/00059
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
116 words
An image forming device, comprising: a transfer belt having a surface and moving in a moving direction; a drive roll for driving the transfer belt, the drive roll moving the transfer belt a first distance by one rotation of the drive roll; an image carrier for transferring an image onto the surface of the transfer belt at an image transfer position; and a pattern detecting sensor for detecting a standard pattern transferred onto the transfer belt by the image carrier, the pattern detecting sensor detecting the standard pattern at a standard pattern detecting position, wherein a second distance between the image transfer position and the standard pattern detecting position is a non-integer-multiple of the first distance.
Claim 2
Dependent Claim
116 words
An image forming device, comprising: a transfer belt having a surface and moving in a moving direction; a drive roll for driving the transfer belt, the drive roll moving the transfer belt a first distance by one rotation of the drive roll; an image carrier for transferring an image onto the surface of the transfer belt at an image transfer position; and a pattern detecting sensor for detecting a standard pattern transferred onto the transfer belt by the image carrier, the pattern detecting sensor detecting the standard pattern at a standard pattern detecting position, wherein a second distance between the image transfer position and the standard pattern detecting position is a non-integer-multiple of the first distance.
Claim 3
Dependent Claim
22 words
The image forming device claimed in claim 1, wherein the second distance is an odd-integer-multiple of a half of the first distance.
Claim 4
Dependent Claim
22 words
The image forming device claimed in claim 1, wherein the second distance is within the range of 1/4-3/4 times the first distance.
Claim 5
Dependent Claim
13 words
The image forming device claimed in claim 2, wherein the odd-integer-multiple is one.
Claim 6
Dependent Claim
50 words
The image forming device claimed in claim 1, wherein the standard pattern is formed of a striped pattern having a predetermined pitch in the moving direction of the transfer belt, and the pattern detecting sensor reads the striped pattern over a length equal to an integer-multiple of the first distance.
Claim 7
Dependent Claim
44 words
The image forming device claimed in claim 1, wherein the standard pattern is formed of a striped pattern having a predetermined pitch in the moving direction of the transfer belt, and the predetermined pitch is an inverse of an integer-multiple of the first distance.
Claim 8
Dependent Claim
167 words
An image forming device, comprising: a transfer member having a surface and moving in a moving direction; a drive source for moving the transfer member at a speed; a speed altering device connected to the drive source for altering the speed at which the drive source moves the transfer member, the speed altering device moving the transfer member a first distance by one rotation of the speed altering device; an image carrier having a surface and for transferring an image onto the surface of the transfer member at an image transfer position; and a pattern detecting sensor for detecting a standard pattern for image position measurement transferred onto the transfer member by the image carrier, the pattern detecting sensor detecting the standard pattern for image position measurement at a standard pattern detecting position, wherein a second distance between the image transfer position and the standard pattern detecting position is a non-integer-multiple of the first distance and the standard pattern for image position measurement has a predetermined pitch.
Claim 9
Dependent Claim
167 words
An image forming device, comprising: a transfer member having a surface and moving in a moving direction; a drive source for moving the transfer member at a speed; a speed altering device connected to the drive source for altering the speed at which the drive source moves the transfer member, the speed altering device moving the transfer member a first distance by one rotation of the speed altering device; an image carrier having a surface and for transferring an image onto the surface of the transfer member at an image transfer position; and a pattern detecting sensor for detecting a standard pattern for image position measurement transferred onto the transfer member by the image carrier, the pattern detecting sensor detecting the standard pattern for image position measurement at a standard pattern detecting position, wherein a second distance between the image transfer position and the standard pattern detecting position is a non-integer-multiple of the first distance and the standard pattern for image position measurement has a predetermined pitch.
Claim 10
Dependent Claim
22 words
The image forming device claimed in claim 7, wherein the second distance is an odd-integer-multiple of a half of the first length.
Claim 11
Dependent Claim
22 words
The image forming device claimed in claim 7, wherein the second distance is within the range of 1/4-3/4 times the first distance.
Claim 12
Dependent Claim
15 words
The image forming device claimed in claim 8, wherein the odd integer multiple is one.
Claim 13
Dependent Claim
50 words
The image forming device claimed in claim 7, wherein the standard pattern is formed of a striped pattern having a predetermined pitch in the moving direction of the transfer member, and the pattern detecting sensor reads the striped pattern over a length equal to an integer-multiple of the first distance.
Claim 14
Dependent Claim
44 words
The image forming device claimed in claim 7, wherein the standard pattern is formed of a striped pattern having a predetermined pitch in the moving direction of the transfer member, and the predetermined pitch is an inverse of an integer-multiple of the first distance.
Claim 15
Dependent Claim
16 words
The image forming device claimed in claim 7, wherein the transfer member is an interim-transfer belt.
Claim 16
Dependent Claim
18 words
The image forming device claimed in claim 7, wherein the transfer member is a paper carrying transfer body.
Claim 17
Dependent Claim
20 words
The image forming device claimed in claim 14, wherein the paper carrying transfer body is a paper carrying transfer belt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |