US4355881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus having roller type fixing device
Assignee: Konica Minolta Inc
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Filing: 1980-06-23
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Granted: 1982-10-26
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Expires: 2000-06-23
Abstract
Abstract A recording apparatus having a roller type fixing device made up of a first roller and a second roller for fixing the image to the transfer paper. The recording apparatus has an upper guide plate placed over the transfer paper passage on the inlet side of the roller type fixing device, the upper guide plate being curved down gradually toward the front end and extending near the lower portion of the first roller. The upper guide plate has on its underside a plurality of projecting strips extending in the direction of the paper feed.
Inventors
- 👤 Noriyoshi Tarumi
- 👤 Kiyoaki Kawamoto
- 👤 Kenji Ueno
- 👤 Hirofumi Sakaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:14
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6529; B; B65; B65H; B65H5/00; B65H5/36; B65H5/38; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2028
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
A recording apparatus having a roller type fixing device made up of a first roller and a second roller for fixing the image to the transfer paper, comprising an upper guide plate placed over the transfer paper passage on the inlet side of the roller type fixing device, the upper guide plate being curved down gradually toward the front end of the fixing device in the direction of the paper feed and having a front edge extending near the lower portion of the first roller so that an angle α less than 80° is made by a line parallel to the direction of the paper feed and a line tangent to the outer circumferential surface of the first roller at a point where a line passing through the front edge of the upper guide plate intersects the circumferential surface of the first roller.
Claim 2
Dependent Claim
143 words
A recording apparatus having a roller type fixing device made up of a first roller and a second roller for fixing the image to the transfer paper, comprising an upper guide plate placed over the transfer paper passage on the inlet side of the roller type fixing device, the upper guide plate being curved down gradually toward the front end of the fixing device in the direction of the paper feed and having a front edge extending near the lower portion of the first roller so that an angle α less than 80° is made by a line parallel to the direction of the paper feed and a line tangent to the outer circumferential surface of the first roller at a point where a line passing through the front edge of the upper guide plate intersects the circumferential surface of the first roller.
Claim 3
Dependent Claim
54 words
A recording apparatus as set forth in claim 1, wherein an angle β made by a line parallel to the direction of the paper feed and a line passing through the front edge of the upper guide plate and tangent to the outer circumferential surface of the first roller is between 10° and 50°.
Claim 4
Dependent Claim
17 words
A recording apparatus as set forth in claim 1 or 2, wherein the angle α is 70°.
Claim 5
Dependent Claim
131 words
A recording apparatus having a roller type fixing device made up of a first roller and a second roller for fixing the image to the transfer paper, comprising an upper guide plate placed over the transfer paper passage on the inlet side of the roller type fixing device, the upper guide plate being curved down gradually toward the front end of the fixing device in the direction of the paper feed and having a front edge extending near the lower portion of the first roller so that an angle β made by a line parallel to the direction of the paper feed and a line passing through the front edge of the upper guide plate and tangent to the outer circumferential surface of the first roller is between 10° and 50°.
Claim 6
Dependent Claim
131 words
A recording apparatus having a roller type fixing device made up of a first roller and a second roller for fixing the image to the transfer paper, comprising an upper guide plate placed over the transfer paper passage on the inlet side of the roller type fixing device, the upper guide plate being curved down gradually toward the front end of the fixing device in the direction of the paper feed and having a front edge extending near the lower portion of the first roller so that an angle β made by a line parallel to the direction of the paper feed and a line passing through the front edge of the upper guide plate and tangent to the outer circumferential surface of the first roller is between 10° and 50°.
Claim 7
Dependent Claim
35 words
A recording apparatus as set forth in claim 1 or 2 or 4, wherein the upper guide plate has on its underside a plurality of projecting strips extending in the direction of the paper feed.
Claim 8
Dependent Claim
20 words
A recording apparatus as set forth in claim 2 or 4, wherein the angle β is between 20° and 40°.
References Cited (Backward Citations)
US3331592A
Cited
US3846151A
Cited
US3937919A
Cited
US3794417A
Cited
US3826896A
Cited
US3898425A
Cited
US4188109A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |