US5126762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording sheet used with image recording apparatus, and method and apparatus for forming image
Assignee: Canon Inc
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Filing: 1990-06-18
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Granted: 1992-06-30
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Expires: 2010-06-18
Abstract
Abstract The present invention provides a recording sheet used with an image forming apparatus comprising: an optical functional portion disposed along at least one edge of the recording sheet and arranged asymmetrically with respect to a center of the edge and having a functional feature regarding light different from that of an image forming portion of the recording sheet.
Inventors
- 👤 Tatsuo Takeuchi
- 👤 Koji Amemiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6588; G03G15/6591; G03G7/00; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00371; G03G2215/00443; G03G2215/00493; G03G2215/00497; G03G2215/00523
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A recording sheet used with an image forming apparatus, comprising: an optical functional portion disposed along at least one edge of the recording sheet and arranged asymmetrically with respect to a center of said edge and having a functional feature regarding light different from that of an image forming portion of the recording sheet, wherein a front surface of the recording sheet has a feature different from that of a back surface of the recording sheet and said optical functional portion is detected in order to determine the front and back surfaces of the recording sheet.
Claim 2
Dependent Claim
96 words
A recording sheet used with an image forming apparatus, comprising: an optical functional portion disposed along at least one edge of the recording sheet and arranged asymmetrically with respect to a center of said edge and having a functional feature regarding light different from that of an image forming portion of the recording sheet, wherein a front surface of the recording sheet has a feature different from that of a back surface of the recording sheet and said optical functional portion is detected in order to determine the front and back surfaces of the recording sheet.
Claim 3
Dependent Claim
19 words
A recording sheet according to claim 1, wherein said front surface of the recording sheet is coated by resin.
Claim 4
Dependent Claim
15 words
A recording sheet according to claim 1, wherein said recording sheet comprises a rectangular sheet.
Claim 5
Dependent Claim
24 words
A recording sheet according to claim 1, wherein said recording sheet comprises a transparent sheet, and said optical functional portion comprises an opaque portion.
Claim 6
Dependent Claim
23 words
A recording sheet according to claim 4, wherein said opaque portion cuts the light from a detecting light source by 60% or more.
Claim 7
Dependent Claim
23 words
A recording sheet according to claim 4, wherein said opaque portion reflects the light from a detecting light source by 60% or more.
Claim 8
Dependent Claim
15 words
A recording sheet according to claim 1, wherein said recording sheet comprises an OHP film.
Claim 9
Dependent Claim
85 words
A recording sheet used with an image forming apparatus, comprising: an optical functional portion disposed along at least one edge of the recording sheet and arranged asymmetrically with respect to a center of said edge and having a functional feature regarding light different from that of an image forming portion of the recording sheet, wherein said optical functional portions are disposed along two edges of the recording sheet and said two edges along which said optical functional portions are disposed are perpendicular to each other.
Claim 10
Dependent Claim
85 words
A recording sheet used with an image forming apparatus, comprising: an optical functional portion disposed along at least one edge of the recording sheet and arranged asymmetrically with respect to a center of said edge and having a functional feature regarding light different from that of an image forming portion of the recording sheet, wherein said optical functional portions are disposed along two edges of the recording sheet and said two edges along which said optical functional portions are disposed are perpendicular to each other.
References Cited (Backward Citations)
JPS5890647A
Cited
JPS58105157A
Cited
JPS58106550A
Cited
JPS58150363A
Cited
JPS597367A
Cited
EP0114471A2
Cited
US4637974A
Cited
JPS608089A
Cited
US5019841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |