US5070415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image reading apparatus having a low friction member between the conveying roller and the transparent plate
Assignee: Canon Inc
•
Filing: 1990-03-28
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Granted: 1991-12-03
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Expires: 2010-03-28
Abstract
Abstract An apparatus for reading an image of a sheet has conveying apparatus for conveying the sheet, a transparent member contacting a surface of the sheet conveyed by the conveying apparatus, and a photoelectric conversion element disposed on the transparent member or on the side opposite to the surface of the transparent member which contacts the surface of the sheet. A low friction portion is formed on that portion of the transparent member which contacts the conveying apparatus.
Inventors
- 👤 Hiroaki Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:59
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/03; H04N1/031; H04N1/04; H04N1/12; H04N1/121; H04N1/1215; H04N1/19; H04N1/191; H04N1/192; H04N1/193
Claims Analysis
Total Claims: 58
Claim 1
Independent Claim
124 words
An apparatus for reading an image on a sheet, comprising: conveying means for conveying the sheet; a transparent member having a surface for contacting said conveying means and a surface of the sheet conveyed by said conveying means; a photoelectric conversion element disposed in said transparent member or on a surface of said transparent member opposite to said surface which contacts the surface of the sheet; and a low friction portion formed on at least a portion of said surface of said transparent member which contacts said conveying means, said low friction portion being disposed at a location upstream of an area on said transparent member at which reading of the image is effected with respect to a direction of conveyance of the sheet.
Claim 2
Independent Claim
124 words
An apparatus for reading an image on a sheet, comprising: conveying means for conveying the sheet; a transparent member having a surface for contacting said conveying means and a surface of the sheet conveyed by said conveying means; a photoelectric conversion element disposed in said transparent member or on a surface of said transparent member opposite to said surface which contacts the surface of the sheet; and a low friction portion formed on at least a portion of said surface of said transparent member which contacts said conveying means, said low friction portion being disposed at a location upstream of an area on said transparent member at which reading of the image is effected with respect to a direction of conveyance of the sheet.
Claim 3
Dependent Claim
13 words
An apparatus according to claim 1, wherein said conveying means includes a roller.
Claim 4
Dependent Claim
18 words
An apparatus according to claim 1, wherein said photoelectric conversion element is in contact with said transparent member.
Claim 5
Dependent Claim
17 words
An apparatus according to claim 1, wherein said photoelectric conversion element is embedded in said transparent member.
Claim 6
Dependent Claim
21 words
An apparatus according to claim 1, further comprising a lens array disposed between said transparent member and said photoelectric conversion element.
Claim 7
Dependent Claim
22 words
An apparatus according to claim 1, wherein said low friction portion comprises a low friction material coating formed on said transparent member.
Claim 8
Dependent Claim
23 words
An apparatus according to claim 1, wherein said low friction portion comprises a tape of low friction material attached onto said transparent member.
Claim 9
Dependent Claim
35 words
An apparatus according to claim 1, wherein a coefficient of friction between said conveying means and said low friction portion is smaller than a coefficient of friction between said conveying means and said transparent member.
Claim 10
Dependent Claim
25 words
An apparatus according to claim 1, wherein the sheet conveyed by said conveying means contacts said transparent member as well as said low friction portion.
Claim 11
Dependent Claim
32 words
An apparatus according to claim 1, wherein a portion of the surface of said transparent member which contacts the sheet conveyed by said conveying means is opposed to said photoelectric conversion element.
Claim 12
Dependent Claim
19 words
An image reading apparatus according to claim 1, wherein said low friction portion includes a coating of fluorine resin.
Claim 13
Dependent Claim
25 words
An image reading apparatus according to claim 11, wherein said conveying means includes a rubber roller, and wherein said transparent member includes a glass plate.
Claim 14
Dependent Claim
17 words
An image reading apparatus according to claim 1, wherein said low friction portion comprises a teflon tape.
Claim 15
Dependent Claim
25 words
An image reading apparatus according to claim 13, wherein said conveying means includes a rubber roller, and wherein said transparent member includes a glass plate.
Claim 16
Dependent Claim
18 words
An image reading apparatus according to claim 14, wherein said low friction portion comprises a high polymer polyethylene.
Claim 17
Dependent Claim
25 words
An image reading apparatus according to claim 15, wherein said conveying roller includes a rubber roller, and wherein said transparent member includes a glass plate.
Claim 18
Dependent Claim
17 words
An image reading apparatus according to claim 1, wherein said low friction portion comprises a vinyl tape.
Claim 19
Dependent Claim
25 words
An image forming apparatus according to claim 17, wherein said conveying means includes a rubber roller, and wherein said transparent member includes a glass plate.
Claim 20
Independent Claim
113 words
An apparatus for reading an image on a sheet, comprising: reading means having a contact surface contacting a surface of the sheet, for reading an image formed on the surface of the sheet, said image being transmitted through said contact surface; conveying means for conveying the sheet while urging the sheet against the contact surface of said reading means; and a low friction surface formed at a location whereat said contact surface is opposed to said conveying means, said low friction surface being disposed at a location upstream of an area on said contact surface at which reading of the image is effected with respect to a direction of conveyance of the sheet.
Claim 21
Independent Claim
113 words
An apparatus for reading an image on a sheet, comprising: reading means having a contact surface contacting a surface of the sheet, for reading an image formed on the surface of the sheet, said image being transmitted through said contact surface; conveying means for conveying the sheet while urging the sheet against the contact surface of said reading means; and a low friction surface formed at a location whereat said contact surface is opposed to said conveying means, said low friction surface being disposed at a location upstream of an area on said contact surface at which reading of the image is effected with respect to a direction of conveyance of the sheet.
Claim 22
Dependent Claim
23 words
An apparatus according to claim 19, wherein said reading means includes a transparent member which contacts the sheet conveyed by said conveying means.
Claim 23
Dependent Claim
19 words
An apparatus according to claim 20, wherein said reading means includes a lens array disposed adjacent said transparent member.
Claim 24
Dependent Claim
22 words
An apparatus according to claim 20, wherein said low friction surface comprises a low friction material coating formed on said transparent member.
Claim 25
Dependent Claim
22 words
An apparatus according to claim 20, wherein said low friction surface comprises a low friction material adhesively secured to said transparent member.
Claim 26
Dependent Claim
35 words
An apparatus according to claim 20, wherein a coefficient of friction between said low friction surface and said conveying means is smaller than a coefficient of friction between said transparent plate and said conveying means.
Claim 27
Dependent Claim
32 words
An apparatus according to claim 20, further comprising a photoelectric conversion element disposed on said transparent member or a surface of said transparent member opposite to the surface which contacts the sheet.
Claim 28
Dependent Claim
29 words
An apparatus according to claim 25, wherein a portion of said transparent member which contacts the sheet conveyed by said conveying means is opposed to said photoelectric conversion element.
Claim 29
Dependent Claim
14 words
An apparatus according to claim 20, wherein said transparent member includes a transparent plate.
Claim 30
Dependent Claim
25 words
An apparatus according to claim 20, wherein the sheet conveyed by said conveying means contacts said transparent member as well as said low friction portion.
Claim 31
Dependent Claim
20 words
An image reading apparatus according to claim 19, wherein said low friction surface comprises a coating of a fluorine resin.
Claim 32
Dependent Claim
25 words
An image reading apparatus according to claim 29, wherein said conveying means includes a rubber roller, and wherein said reading means includes a glass plate.
Claim 33
Dependent Claim
17 words
An image reading apparatus according to claim 19, wherein said low friction surface comprises a teflon tape.
Claim 34
Dependent Claim
25 words
An image reading apparatus according to claim 31, wherein said conveying means includes a rubber roller, and wherein said reading means includes a glass plate.
Claim 35
Dependent Claim
18 words
An image reading apparatus according to claim 19, wherein said low friction surface comprises a high polymer polyethylene.
Claim 36
Dependent Claim
25 words
An image reading apparatus according to claim 33, wherein said conveying means includes a rubber roller, and wherein said reading means includes a glass plate.
Claim 37
Dependent Claim
17 words
An image reading apparatus according to claim 19, wherein said low friction surface comprises a vinyl tape.
Claim 38
Dependent Claim
25 words
An image reading apparatus according to claim 35, wherein said conveying means includes a rubber roller, and wherein said reading means includes a glass plate.
Claim 39
Independent Claim
112 words
An apparatus for reading an image on a sheet, comprising: a transparent member for contacting a surface of the sheet; reading means for reading the image formed on the surface of the sheet, said image being transmitted through a predetermined area of said transparent member; conveying means for conveying the sheet while urging the sheet against said transparent member; and a low friction surface formed upstream of said predetermined area of said transparent member with respect to a direction of conveyance of the sheet, a coefficient of friction between said low friction surface and said conveying means being smaller than a coefficient of friction between said conveying means and said transparent plate.
Claim 40
Independent Claim
112 words
An apparatus for reading an image on a sheet, comprising: a transparent member for contacting a surface of the sheet; reading means for reading the image formed on the surface of the sheet, said image being transmitted through a predetermined area of said transparent member; conveying means for conveying the sheet while urging the sheet against said transparent member; and a low friction surface formed upstream of said predetermined area of said transparent member with respect to a direction of conveyance of the sheet, a coefficient of friction between said low friction surface and said conveying means being smaller than a coefficient of friction between said conveying means and said transparent plate.
Claim 41
Dependent Claim
32 words
An apparatus according to claim 37, further comprising a photoelectric conversion element disposed on said transparent member or fixed to a surface of said transparent member opposite the surface contacting the sheet.
Claim 42
Dependent Claim
29 words
An apparatus according to claim 38, wherein a portion of said transparent member which contacts the sheet conveyed by said conveying means is opposed to said photoelectric conversion element.
Claim 43
Dependent Claim
22 words
An apparatus according to claim 37, wherein said low friction surface comprises a low friction material coating formed on said transparent member.
Claim 44
Dependent Claim
22 words
An apparatus according to claim 37, wherein said low friction surface comprises a low friction material adhesively secured to said transparent member.
Claim 45
Dependent Claim
25 words
An apparatus according to claim 37, wherein the sheet conveyed by said conveying means contacts said transparent member as well as said low friction portion.
Claim 46
Dependent Claim
25 words
An image reading apparatus according to claim 42, wherein said image sensor has a transparent member which contacts the sheet conveyed by said conveying means.
Claim 47
Dependent Claim
33 words
An image reading apparatus according to claim 43, further comprising a photoelectric conversion element disposed on said transparent member or a surface of said transparent member opposite the surface which contacts the sheet.
Claim 48
Dependent Claim
30 words
An image reading apparatus according to claim 44, wherein a portion of said transparent member contacting the sheet conveyed by said conveying means is opposed to said photoelectric conversion element.
Claim 49
Dependent Claim
17 words
An image reading apparatus according to claim 37, wherein said low friction surface comprises a vinyl tape.
Claim 50
Dependent Claim
25 words
An image reading apparatus according to claim 46, wherein said low friction means includes a rubber roller, while said reading means includes a glass plate.
Claim 51
Independent Claim
181 words
An apparatus for reading an image of a sheet, comprising: first conveying means for conveying the sheet; a first transparent member having a first surface contacting a surface of the sheet conveyed by said first conveying means; a second transparent member disposed on a side of said first transparent member opposite to said first surface which contacts the surface of the sheet; a photoelectric conversion element disposed on or in proximity to said first transparent member, for reading an image formed on the surface of the sheet which is transmitted through a predetermined reading area of said first transparent member; second conveying means for imparting a conveying force to the sheet while urging the sheet against said first transparent member; illuminating means for illuminating the surface of the sheet through said first transparent member and through said second transparent member; and a low friction member disposed at a portion of said first transparent member which contacts said second conveying means, said low friction member being disposed at a location upstream of the reading area with respect to the sheet conveying direction.
Claim 52
Independent Claim
181 words
An apparatus for reading an image of a sheet, comprising: first conveying means for conveying the sheet; a first transparent member having a first surface contacting a surface of the sheet conveyed by said first conveying means; a second transparent member disposed on a side of said first transparent member opposite to said first surface which contacts the surface of the sheet; a photoelectric conversion element disposed on or in proximity to said first transparent member, for reading an image formed on the surface of the sheet which is transmitted through a predetermined reading area of said first transparent member; second conveying means for imparting a conveying force to the sheet while urging the sheet against said first transparent member; illuminating means for illuminating the surface of the sheet through said first transparent member and through said second transparent member; and a low friction member disposed at a portion of said first transparent member which contacts said second conveying means, said low friction member being disposed at a location upstream of the reading area with respect to the sheet conveying direction.
Claim 53
Dependent Claim
80 words
An image reading apparatus, comprising: an image sensor having a contact surface adapted to contact a sheet surface, for reading an image formed on the sheet surface, said image being transmitted through said contact surface, said image sensor including a lens array adjacent said contact surface; conveying means for conveying the sheet by pressing it against the contact surface of said image sensor; and a low friction surface formed on the contact surface at a position opposing said conveying means.
Claim 54
Dependent Claim
80 words
An image reading apparatus, comprising: an image sensor having a contact surface adapted to contact a sheet surface, for reading an image formed on the sheet surface, said image being transmitted through said contact surface, said image sensor including a lens array adjacent said contact surface; conveying means for conveying the sheet by pressing it against the contact surface of said image sensor; and a low friction surface formed on the contact surface at a position opposing said conveying means.
Claim 55
Dependent Claim
24 words
An image reading apparatus according to claim 49, wherein said low friction surface comprises a low friction material coating formed on said contact surface.
Claim 56
Dependent Claim
23 words
An image reading apparatus according to claim 49, wherein said low friction surface comprises a low friction material adhered to said contact surface.
Claim 57
Dependent Claim
37 words
An image reading apparatus according to claim 49, wherein a coefficient of friction between said low friction surface and said conveying means is smaller than a coefficient of friction between said contact surface and said conveying means.
Claim 58
Dependent Claim
27 words
An image reading apparatus according to claim 49, wherein the sheet conveyed by said conveying means contacts said contact surface as well as said low friction surface.
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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) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |