Patent US1440875A successfully refreshed from Google Patents.
Patent US4857943A successfully refreshed from Google Patents.
US4857943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus having edge-guiding member for guiding a recording medium
Assignee: Canon Inc
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Filing: 1988-05-02
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Granted: 1989-08-15
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Expires: 2008-05-02
Abstract
Abstract An image forming apparatus has a paper guide, a feed roller and a pinch roller for feeding and guiding a recording medium. The pinch roller is biased to normally be pressed agaisnt the feed roller and can be separated from the feed roller so that the recording medium can be introduced between them. The paper guide comprises two guide members that contact respective side edges of the recording medium when the pinch roller is separated from the feed roller.
Inventors
- 👤 Shigeru Yoshimura
- 👤 Tetsuo Suzuki
- 👤 Makoto Takemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:17
CPC Classifications
B; B41; B41J; B41J29/00; B41J29/02; B41J29/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
An image forming apparatus comprising: a rotary member for conveying a recording medium in a conveying direction; a pinch member for urging the recording medium against said rotary member; an opening/closing mechanism for moving said rotary member and said pinch member relative to each other between a pinching position, wherein said pinch member urges the recording medium against said rotary member, and a retracted position, wherein said pinch member is separated from said rotary member; and first and second guide members for contacting respective side edges of the recording medium and including means for placing said guide members so as to guide the recording medium in the conveying direction when said rotary member and said pinch member are in the retracted position.
Claim 2
Dependent Claim
122 words
An image forming apparatus comprising: a rotary member for conveying a recording medium in a conveying direction; a pinch member for urging the recording medium against said rotary member; an opening/closing mechanism for moving said rotary member and said pinch member relative to each other between a pinching position, wherein said pinch member urges the recording medium against said rotary member, and a retracted position, wherein said pinch member is separated from said rotary member; and first and second guide members for contacting respective side edges of the recording medium and including means for placing said guide members so as to guide the recording medium in the conveying direction when said rotary member and said pinch member are in the retracted position.
Claim 3
Dependent Claim
19 words
An apparatus according to claim 1, wherein said pinch member is a rotatable member for contacting said rotary member.
Claim 4
Dependent Claim
35 words
An apparatus according to claim 1, wherein said first and second guide members each has a portion for holding and guiding each of the side edges of the recording medium in the width direction thereof.
Claim 5
Dependent Claim
53 words
An apparatus according to claim 1, further comprising a recording medium conveying and guiding member for forming a recording area upstream of said rotaary member and said pinch member in the conveying direction, and an ink jet recording unit opposite the recording area for recording by discharging ink droplets onto a recording medium.
Claim 6
Dependent Claim
52 words
An apparatus according to claim 4, further comprising recording means having a recording unit comprising plural recording heads for different liquids arranged along the conveyance direction, each said head having a width substantially corresponding to the width of the recording medium, wherein the recording area is a surface opposiste said recording unit.
Claim 7
Dependent Claim
66 words
An apparatus according to claim 4, further comprising a pair of second conveying members spaceable from each other for pinching and conveying the recording medium, said second conveying members being upstream of said recording medium conveying and guiding member in the conveying direction, wherein the conveyance speed of said second conveying members is slower than the conveyance speed of said rotary member and said pinch member.
Claim 8
Dependent Claim
45 words
An apparatus according to claim 4, said apparatus further comprising a pair of second conveying members spaceable from each other for pinching and conveying the recording medium, said second conveying members being upstream of said recording medium conveying and guiding member in the conveying direction.
Claim 9
Dependent Claim
243 words
An image forming apparatus comprising: a rotary member for conveying a recording medium in a conveying direction; a pinch member for urging the recording medium against said rotary member; an opening/closing mechanism for moving said rotary member and said pinch member relative to each other between a pinching position, wherein said pinch member urges the recording medium against said rotary member, and a retracted position, wherein said pinch member is separated from said rotary member; first and second guide members for contacting respective side edges of the recording medium and including means for placing said guide members so as to guide the recording medium in the conveying direction when said rotary member and said pinch member are in the retracted position; a recording medium conveying and guiding member for forming a recording area upstream of said rotary member and said pinch member in the conveying direction; a pair of second conveying members spaceable from eadch other for pinching and conveying the recording medium, said second conveying members being upstream of said recording medium conveying and guiding member in the conveying direction; and an ink jet recording unit opposite the recording area, for recording by discharging ink droplets onto a recording medium, said recording unit comprising plural recording heads for different liquids arranged along the conveyance direction, each said head having a width substantially corresponding to the width of the recording medium, and wherein the recording area is a surface opposite said recording unit.
Claim 10
Dependent Claim
243 words
An image forming apparatus comprising: a rotary member for conveying a recording medium in a conveying direction; a pinch member for urging the recording medium against said rotary member; an opening/closing mechanism for moving said rotary member and said pinch member relative to each other between a pinching position, wherein said pinch member urges the recording medium against said rotary member, and a retracted position, wherein said pinch member is separated from said rotary member; first and second guide members for contacting respective side edges of the recording medium and including means for placing said guide members so as to guide the recording medium in the conveying direction when said rotary member and said pinch member are in the retracted position; a recording medium conveying and guiding member for forming a recording area upstream of said rotary member and said pinch member in the conveying direction; a pair of second conveying members spaceable from eadch other for pinching and conveying the recording medium, said second conveying members being upstream of said recording medium conveying and guiding member in the conveying direction; and an ink jet recording unit opposite the recording area, for recording by discharging ink droplets onto a recording medium, said recording unit comprising plural recording heads for different liquids arranged along the conveyance direction, each said head having a width substantially corresponding to the width of the recording medium, and wherein the recording area is a surface opposite said recording unit.
Claim 11
Dependent Claim
29 words
An apparatus according to claim 8, wherein the conveyance speed of said second conveying members is lower than the conveyance speed of said rotary member and said pinch member.
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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |