Patent US4803519A successfully refreshed from Google Patents.
US4803519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copying machine with document-winding drum and document table
Assignee: Sharp Corp
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Filing: 1987-12-16
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Granted: 1989-02-07
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Expires: 2007-12-16
Abstract
Abstract An electrophotographic copying machine includes a document mount portion, a document-winding drum, and a selection element. A book-like document can be copied when it is mounted on the document mount portion or a sheet-like copy document can be copied by being wound around the document drum by operation of the selection element. The document mount portion and the document drum are positioned within the range of movement of a common light scanning source so that the copy document provided on either the mount portion or the drum is optically scanned with the common light scanning source.
Inventors
- 👤 Atsushi Asada
- 👤 Shunju Anzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:53
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/625; G03G15/04; G03G15/302; G03G15/305
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
147 words
An electrophotographic copying machine including: a document table having a support surface for supporting a first document to be copied; a document drum for receiving and winding a second sheet-like document thereon to be copied positioned at the same level of the support surface of said document table; a substantially planar reciprocating light scanning source positioned relative to each of said document drum and document table so that by selective movement of said light scanning source either of said first or second documents can be scanned by said light scanning source, said light scanning source being positioned when not in operation between said document table and said drum with said document drum being positioned at one extremity of the range of movement of said light scanning source; and selection means for operating said light scanning source to selectively scan either of said first or said second documents.
Claim 2
Dependent Claim
147 words
An electrophotographic copying machine including: a document table having a support surface for supporting a first document to be copied; a document drum for receiving and winding a second sheet-like document thereon to be copied positioned at the same level of the support surface of said document table; a substantially planar reciprocating light scanning source positioned relative to each of said document drum and document table so that by selective movement of said light scanning source either of said first or second documents can be scanned by said light scanning source, said light scanning source being positioned when not in operation between said document table and said drum with said document drum being positioned at one extremity of the range of movement of said light scanning source; and selection means for operating said light scanning source to selectively scan either of said first or said second documents.
Claim 3
Dependent Claim
33 words
The machine of claim 1, wherein said document drum means comprises a document drum for winding said document thereon and an electrode means disposed on said document drum for receiving a DC voltage.
Claim 4
Dependent Claim
28 words
The machine of claim 2, wherein said electrode means comprises a plurality of positive and negative interdigital electrodes longitudinally extending from both ends of said document drum means.
Claim 5
Dependent Claim
14 words
The machine of claim 3, wherein said positive and negative interdigital electrodes are printed.
Claim 6
Dependent Claim
18 words
The machine of claim 4, wherein said positive and negative interdigital electrodes are coated with a synthetic resin.
Claim 7
Dependent Claim
26 words
The machine of claim 3, further comprising brush means including electrically conductive low resistance fibers supplying the DC voltage to the positive and negative interdigital electrodes.
Claim 8
Dependent Claim
43 words
The electrophotographic copying machine of claim 1, wherein said reciprocating light source is reciprocated between a pair of micro-switches during scanning said document on said document table and is fixed at a third microswitch when scanning said sheet-like document on said document drum.
Claim 9
Dependent Claim
46 words
The electrophotographic copying machine of claim 1, wherein said document drum rotates in unison with a photoreceptor responsive to said light scanning source for forming an electrostatic latent image on said photoreceptor of either said document on said drum or said document on said document table.
Claim 10
Dependent Claim
45 words
The electrophotographic copying machine of claim 1, wherein said document drum includes an electrode means disposed on said document drum for applying a DC voltage to the surface of said drum such that said document is electrostatically attracted to and tightly wound on said drum.
Claim 11
Dependent Claim
29 words
The electrophotographic copying machine of claim 9, wherein said electrode means comprises a plurality of positive and negative interdigital electrodes longitudinally extending from both ends of said document drum.
Claim 12
Dependent Claim
16 words
The electrophotographic copying machine of claim 10, wherein said positive and negative interdigital electrodes are printed.
Claim 13
Dependent Claim
20 words
The electrophotographic copying machine of claim 11, wherein said positive and negative interdigital electrodes are coated with a synthetic resin.
Claim 14
Dependent Claim
27 words
The electrophotographic copying machine of claim 10, further comprising brush means including electrically conductive low resistance fibers supplying DC voltage to the positive and negative interdigital electrodes.
Claim 15
Dependent Claim
37 words
The electrophotographic copying machine of claim 1, wherein said document drum further includes supply roller means for forwarding said second document onto said document drum, and roller means for separating said second document from said document drum.
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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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |