Patent US4893189A successfully refreshed from Google Patents.
US4893189A
Expired / Lapsed
US
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Portable image scanner
Assignee: Canon Finetech Nisca Inc
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Filing: 1988-06-30
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Granted: 1990-01-09
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Expires: 2008-06-30
Abstract
Abstract Reflected image light obtained by illuminating a reading portion to be read on a given objective image plane is sent to an image sensor located on the rear side through a reflecting member disposed substantially just above the reading portion. By forming a viewing path inclined forward against the image sensor so as to permit the reading portion to be observed easily, the desired image light reflected from the reading portion is little interfered with external light entering inside the scanner through the viewing path, thereby to enjoy image processing of high quality.
Inventors
- 👤 Mineo Kubota
- 👤 Kenji Masuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:23
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/10; H04N1/107; H04N1/1077; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/043
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
A portable image scanner comprising a light source for illuminating an reading portion to be read on an objective image plane, a reflecting member for refracting image light reflected in a substantially vertical direction from the reading portion, an image sensor which receives said image light sent through said reflecting member and is adapted to convert said image light to corresponding image data signals, a housing accommodating said light source, reflecting member and image sensor, and a sub-scanning drive member for allowing the scanner to move in a sub-scanning direction, said housing being provided at its lower surface with a reading aperture and at its upper surface with a peep hole displaced to the image sensor side with respect to a portion substantially right above said reading aperture so as to form a viewing path inclined against said image sensor side.
Claim 2
Dependent Claim
141 words
A portable image scanner comprising a light source for illuminating an reading portion to be read on an objective image plane, a reflecting member for refracting image light reflected in a substantially vertical direction from the reading portion, an image sensor which receives said image light sent through said reflecting member and is adapted to convert said image light to corresponding image data signals, a housing accommodating said light source, reflecting member and image sensor, and a sub-scanning drive member for allowing the scanner to move in a sub-scanning direction, said housing being provided at its lower surface with a reading aperture and at its upper surface with a peep hole displaced to the image sensor side with respect to a portion substantially right above said reading aperture so as to form a viewing path inclined against said image sensor side.
Claim 3
Dependent Claim
52 words
A portable image scanner according to claim 1, wherein said light source is disposed on the forward upper-side of said reading aperture so as to illuminate said reading aperture from the upper front and said image sensor is disposed on the rearward side of and on a level with said reflecting member.
Claim 4
Dependent Claim
19 words
A portable image scanner according to claim 1, further comprising a reading-position determining member disposed in said viewing path.
Claim 5
Dependent Claim
16 words
A portable image scanner according to claim 1, wherein said sub-scanning drive member is a roller.
Claim 6
Dependent Claim
33 words
A portable image scanner according to claim 4, further comprising a guard cover covering partly of said roller, which guard cover is provided with a reading-position determining member placed in said viewing path.
Claim 7
Dependent Claim
27 words
A portable image scanner according to claim 4, wherein said roller is provided on its periphery with a reading-position determining member placed touching tangentially said viewing path.
Claim 8
Dependent Claim
29 words
A portable image scanner according to claim 1, further comprising a shielding member formed under said peep hole so as to prevent undesirable light from entering said image sensor.
Claim 9
Dependent Claim
23 words
A portable image scanner according to claim 1, wherein said peep hole is closed with a filter member having low permeability to light.
Claim 10
Dependent Claim
25 words
A portable image scanner according to claim 8, wherein said filter member is formed in a part of a decorative cover covering partly said housing.
Claim 11
Dependent Claim
23 words
A portable image scanner according to claim 3, wherein said viewing path is defined by said reflecting member and said reading-position determining member.
References Cited (Backward Citations)
US4819083A
Cited
US4800444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |