Patent US4727400A successfully refreshed from Google Patents.
US4727400A
Expired / Lapsed
US
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Document table for document reproduction apparatus
Assignee: Sharp Corp
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Filing: 1986-05-22
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Granted: 1988-02-23
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Expires: 2006-05-22
Abstract
Abstract A document table device for an electrophotographic copying machine or image scanner includes a transparent reciprocating table for carrying a document, a transparent pivotal document cover for pressing the document toward the table, and a pivotal light shield for shielding scanning light, the light shield covering only a portion of the document cover.
Inventors
- 👤 Tatsuya Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:01
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/60; G03G15/605; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/6221; G03B27/6228; G03B27/6235
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A document table device for a document reproduction apparatus comprising: transparent document table means for supporting a document to be copied; transparent document cover means for covering the copy document and pressing the copy document toward said document table means; a light source positioned beneath said document table means for directing a light beam of a predetermined width toward the copy document in a copying operation, said light source being relatively movable with respect to said table means and said cover means; and light shield means for shielding light generated by said light source, said light shield means being optically aligned with and in fixed relationship to said light source and of a predetermined width substantially equal to the width of the light beam of said light source.
Claim 2
Dependent Claim
128 words
A document table device for a document reproduction apparatus comprising: transparent document table means for supporting a document to be copied; transparent document cover means for covering the copy document and pressing the copy document toward said document table means; a light source positioned beneath said document table means for directing a light beam of a predetermined width toward the copy document in a copying operation, said light source being relatively movable with respect to said table means and said cover means; and light shield means for shielding light generated by said light source, said light shield means being optically aligned with and in fixed relationship to said light source and of a predetermined width substantially equal to the width of the light beam of said light source.
Claim 3
Dependent Claim
16 words
The device according to claim 1, wherein said document reproduction apparatus is an electrophotographic copying machine.
Claim 4
Dependent Claim
55 words
The device according to claim 1, wherein each of said transparent document cover means and said light shield means are pivotable, and further comprising means for receiving the tip of said pivotable light shield means when said document cover means and said light shield means are pressing the copy document toward said document table means.
Claim 5
Dependent Claim
30 words
The device according to claim 1, wherein said document cover means is reciprocable with said document table means, while said light shield means is fixed to the document reproduction apparatus.
Claim 6
Dependent Claim
15 words
The device according to claim 1, wherein said document reproduction apparatus is an image scanner.
References Cited (Backward Citations)
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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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |