Patent US4154524A successfully refreshed from Google Patents.
US4154524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying apparatus for thick and sheet originals
Assignee: Canon Inc
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Filing: 1977-08-15
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Granted: 1979-05-15
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Expires: 1997-08-15
Abstract
Abstract A copying apparatus comprises an original supporting carriage for supporting thereon a stationary original, original feeder for feeding an original past an exposure station first scanning optical system comprising illumination lamps, mirrors and a lens for projecting onto a photosensitive medium the image of the original resting on the original supporting carriage, and second scanning optical system comprising illumination lamps, mirrors and a lens for projecting the image of the original onto the photosensitive medium. The photosensitive medium has thereon a common image focus position for two modes effected by the first and the second scanning optical systems.
Inventors
- 👤 Hiroyuki Hattori
- 👤 Katsuichi Shimizu
- 👤 Hirotoshi Kishi
- 👤 Hiroshi Ogawa
- 👤 Kazumi Umezawa
- 👤 Seiji Sagara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:54
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
A copying machine comprising in combination: an original holder for holding a thick original; a photosensitive member; first optical means, including an illumination lamp, a mirror and a single lens, for forming an image on said photosensitive medium of an original placed on said original holder; an exposure station for a sheet original; feeding means for feeding a sheet original through said exposure station at an adjustable speed; second optical means including an illumination lamp, a plurality of movable mirrors and a single movable lens, for forming an image on said photosensitive member of a sheet original in an enlarged or reduced scale at the same position as that of the image formed by said first optical means; and means for moving said plurality of movable mirrors and said single movable lens in synchronism to change the magnification of the image of the sheet original.
Claim 2
Dependent Claim
145 words
A copying machine comprising in combination: an original holder for holding a thick original; a photosensitive member; first optical means, including an illumination lamp, a mirror and a single lens, for forming an image on said photosensitive medium of an original placed on said original holder; an exposure station for a sheet original; feeding means for feeding a sheet original through said exposure station at an adjustable speed; second optical means including an illumination lamp, a plurality of movable mirrors and a single movable lens, for forming an image on said photosensitive member of a sheet original in an enlarged or reduced scale at the same position as that of the image formed by said first optical means; and means for moving said plurality of movable mirrors and said single movable lens in synchronism to change the magnification of the image of the sheet original.
Claim 3
Dependent Claim
24 words
A copying apparatus according to claim 1, wherein said plurality of movable mirrors includes a pair of mirrors which are movable as a unit.
Claim 4
Dependent Claim
33 words
A copying apparatus according to claim 1 wherein said sheet original feeding means and said second optical means are constructed as a unit which is attachable to and detachable from said copying apparatus.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |