US3740133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic copying apparatus of slit exposure type
Assignee: Canon Inc
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Filing: 1971-12-23
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Granted: 1973-06-19
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Expires: 1991-12-23
Abstract
Abstract An electrophotographic copying apparatus of slit exposure type comprises a sheet original conveyor mechanism provided on top of the machine housing, and an original carriage having a transparent sheet of glass or the like provided contiguously with the frame of the conveyor mechanism. When a sheet original is to be copied, such original is transported by the sheet original conveyor mechanism for a through-slit exposure. When a thick original such as book or the like is to be copied, the original carriage with the thick original thereon is forced to move with the conveyor mechanism to disconnect the mechanism from its drive system but connect the drive system to the original carriage, whereafter the carriage is moved for the thick original thereon to be subjected to a through-slit exposure.
Inventors
- 👤 S Komori
- 👤 J Sato
- 👤 H Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:17
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03G15/302
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
220 words
A photographic copying machine of the through-slit exposure type comprising: a housing; a through-slit exposure device mounted in said housing; sheet original conveyor means having a sheet passage for transporting a sheet original through said passage and past said through-slit exposure device to form the image of said sheet original on a photosensitive medium; an original carriage mounted for reciprocal movement on said housing and having a transparent plate fixed thereto for supporting a thick original for a movement past said throughslit exposure device to form the image of said thick original on the photosensitive medium; means integrally mounting said conveyor means on said carriage wherein said conveyor means is fixed against movement with respect to said carriage; photographic copy processing means for operation to produce copies of said sheet original and thick original images on said photosensitive medium when one of said originals is moved past said exposure device; and drive system means releasably coupled to said conveyor means for operation to activate said conveyor means to transport said sheet original past said through-slit exposure device while maintaining said carriage in a predetermined stationary position when a sheet original is being copied, and means for decoupling said drive system means from said conveyor means when said carriage is reciprocated to move said thick original past said through-slit exposure device.
Claim 2
Dependent Claim
220 words
A photographic copying machine of the through-slit exposure type comprising: a housing; a through-slit exposure device mounted in said housing; sheet original conveyor means having a sheet passage for transporting a sheet original through said passage and past said through-slit exposure device to form the image of said sheet original on a photosensitive medium; an original carriage mounted for reciprocal movement on said housing and having a transparent plate fixed thereto for supporting a thick original for a movement past said throughslit exposure device to form the image of said thick original on the photosensitive medium; means integrally mounting said conveyor means on said carriage wherein said conveyor means is fixed against movement with respect to said carriage; photographic copy processing means for operation to produce copies of said sheet original and thick original images on said photosensitive medium when one of said originals is moved past said exposure device; and drive system means releasably coupled to said conveyor means for operation to activate said conveyor means to transport said sheet original past said through-slit exposure device while maintaining said carriage in a predetermined stationary position when a sheet original is being copied, and means for decoupling said drive system means from said conveyor means when said carriage is reciprocated to move said thick original past said through-slit exposure device.
Claim 3
Dependent Claim
41 words
A photographic copying machine according to claim 1, wherein said original carriage has driven means, and further comprising means for coupling said driven means to said drive system means for moving said original carriage when said thick original is being copied.
Claim 4
Dependent Claim
61 words
A photographic copying machine according to claim 1, further comprising control means for synchronizing the movement of said sheet and thick originals past said through-slit exposure device with the movement of said photosensitive medium, said control means including a first actuator member operated by said sheet original and a second actuator member operated by a cam formed in said original carriage.
Claim 5
Dependent Claim
20 words
Photocopying apparatus according to claim 1, wherein said transparent is disposed to provide a guide member for said sheet original.
Claim 6
Dependent Claim
45 words
Photocopying apparatus according to claim 5, further comprising locking means for maintaining said carriage in said predetermined stationary position wherein said locking means comprises a projecting member provided on said carriage and resilient holding means mounted on said housing for releasably grasping said projecting member.
References Cited (Backward Citations)
US3510218A
Cited
US3597074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |