Patent US4072412A successfully refreshed from Google Patents.
US4072412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image transfer device
Assignee: Canon Inc
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Filing: 1975-12-23
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Granted: 1978-02-07
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Expires: 1995-12-23
Abstract
Abstract An image transfer device, in which a developed image formed on an image-bearing member is transferred therefrom to a transfer medium, comprises a corona discharge device opposed to the image-bearing member for imparting corona discharge, a device for gripping the leading end edge of the transfer medium, a support extending between the corona discharge device and the image-bearing member and supporting the gripping device for circulatory movement, and an element for confining the path of the transfer medium gripped and guided by the gripping device substantially within the path of that device.
Inventors
- 👤 Masashi Suda
- 👤 Shunichi Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:33
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0105; G03G15/0131; G03G15/14; G03G15/16; G03G15/163; G03G15/1635; G03G15/165; G03G15/1655; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0174; G03G2215/0177
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
120 words
An image transfer device for causing developed images formed on an image-bearing member to be transferred therefrom to a transfer medium, said device comprising: corona discharge means opposed to said image-bearing member for imparting corona discharge; gripper means for gripping the leading end edge of said transfer medium; support means extending between said corona discharge means and said image-bearing member and supporting said gripper means for circulatory movement; and transfer medium confining means for confining the path of the transfer medium gripped and guided by said gripper means substantially within the path of said gripper means, said transfer medium confining means including at least one set of confining roller pairs disposed with the path of said gripper means intervening therebetween.
Claim 2
Dependent Claim
120 words
An image transfer device for causing developed images formed on an image-bearing member to be transferred therefrom to a transfer medium, said device comprising: corona discharge means opposed to said image-bearing member for imparting corona discharge; gripper means for gripping the leading end edge of said transfer medium; support means extending between said corona discharge means and said image-bearing member and supporting said gripper means for circulatory movement; and transfer medium confining means for confining the path of the transfer medium gripped and guided by said gripper means substantially within the path of said gripper means, said transfer medium confining means including at least one set of confining roller pairs disposed with the path of said gripper means intervening therebetween.
Claim 3
Dependent Claim
28 words
An image transfer device according to claim 1, wherein said pairs of rollers are rotatable at a velocity equal to the velocity of movement of said gripper means.
Claim 4
Dependent Claim
33 words
An image transfer device according to claim 1, wherein at least one of said pairs of rollers is displaceable out of the path of said gripper means when the latter traverses the former.
Claim 5
Dependent Claim
144 words
An image transfer device for causing developed images formed on an image-bearing member to be transferred therefrom to a transfer medium, said device comprising: corona discharge means; a drum supported for rotation about the axis thereof and containing therewithin said corona discharge means, said drum having an opening formed in the side wall thereof for permitting the corona discharge to act therethrough; gripper means provided on said drum for gripping the leading end edge of said transfer medium; and transfer medium confining means for confining the path of the transfer medium gripped and guided by said gripper means substantially within the path of said gripper means, said transfer medium confining means comprising first transfer medium confining members disposed within said drum and outwardly displaceable in said opening of said drum, and second transfer medium confining members disposed along the outer periphery of said drum.
Claim 6
Dependent Claim
144 words
An image transfer device for causing developed images formed on an image-bearing member to be transferred therefrom to a transfer medium, said device comprising: corona discharge means; a drum supported for rotation about the axis thereof and containing therewithin said corona discharge means, said drum having an opening formed in the side wall thereof for permitting the corona discharge to act therethrough; gripper means provided on said drum for gripping the leading end edge of said transfer medium; and transfer medium confining means for confining the path of the transfer medium gripped and guided by said gripper means substantially within the path of said gripper means, said transfer medium confining means comprising first transfer medium confining members disposed within said drum and outwardly displaceable in said opening of said drum, and second transfer medium confining members disposed along the outer periphery of said drum.
Claim 7
Dependent Claim
23 words
An image transfer device according to claim 4, wherein at least one of said first transfer medium confining members is a movable roller.
Claim 8
Dependent Claim
29 words
An image transfer device according to claim 5, wherein said movable roller is rotatively driven in said opening at a velocity equal to the peripheral velocity of said drum.
Claim 9
Dependent Claim
23 words
An image transfer device according to claim 4, wherein at least one of said second transfer medium confining members is a movable roller.
Claim 10
Dependent Claim
25 words
An image transfer device according to claim 7, wherein said movable roller is rotatable at a velocity equal to the peripheral velocity of said drum.
Claim 11
Dependent Claim
24 words
An image transfer device according to claim 4, wherein at least one of said second transfer medium confining members is a stationary guide plate.
Claim 12
Dependent Claim
25 words
An image transfer device according to claim 4, wherein at least one of said second transfer medium confining members is a paper feed guide plate.
Claim 13
Dependent Claim
32 words
An image transfer device according to claim 4, further comprising means disposed within said drum and adjacent to said corona discharge means for pressing said transfer medium against said image bearing member.
Claim 14
Dependent Claim
16 words
An image transfer device according to claim 11, wherein said pressing means comprises a spring member.
Claim 15
Dependent Claim
17 words
An image transfer device according to claim 11, wherein said pressing means comprises a movably mounted roller.
Claim 16
Dependent Claim
138 words
An image transfer device for causing developed images formed on an image-bearing member to be transferred therefrom to a transfer medium, said device comprising: corona discharge means; a drum supported for rotation about the axis thereof and containing therewithin said corona discharge means, said drum having an opening formed in the side wall thereof for permitting the corona discharge to act therethrough; gripper means provided on said drum for gripping the leading end edge of said transfer medium; and transfer medium confining means for confining the path of the transfer medium gripped and guided by said gripper means substantially within the path of said gripper means, said transfer medium confining means comprising first transfer medium confining members disposed at said opening of said drum, and second transfer medium confining members disposed along the outer periphery of said drum.
Claim 17
Dependent Claim
138 words
An image transfer device for causing developed images formed on an image-bearing member to be transferred therefrom to a transfer medium, said device comprising: corona discharge means; a drum supported for rotation about the axis thereof and containing therewithin said corona discharge means, said drum having an opening formed in the side wall thereof for permitting the corona discharge to act therethrough; gripper means provided on said drum for gripping the leading end edge of said transfer medium; and transfer medium confining means for confining the path of the transfer medium gripped and guided by said gripper means substantially within the path of said gripper means, said transfer medium confining means comprising first transfer medium confining members disposed at said opening of said drum, and second transfer medium confining members disposed along the outer periphery of said drum.
Claim 18
Dependent Claim
23 words
An image transfer device according to claim 14, wherein said at least one of second transfer medium confining members is a movable roller.
Claim 19
Dependent Claim
19 words
An image transfer device according to claim 14, wherein said first transfer medium confining members are filament-like guide members.
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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |