US3856397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viewing and electrostatic copying machine
Assignee: Minolta Co Ltd
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Filing: 1973-07-12
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Granted: 1974-12-24
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Expires: 1993-07-12
Abstract
Abstract A microfilm viewer and electrostatic copying machine includes a mirror which is swingable between a first position which directs an image onto a viewing screen and a second position which permits the projection of the image on a reproduction focal plane. Feed rolls withdraw copy paper from a roll thereof and advance it through a cutter to an electrostatic charger and then to a conveyor which transports the charged paper to the image focal plane and then to the image developer. A motor driven endless sprocket chain has a pair of spaced first sprocket sections along one side, a second sprocket chain section along the opposite side, and a switch actuator. The chain motor is connected to a source of current through a normally closed first switch and upon energization of the motor the sprocket chain is driven to advance the actuator from the first switch to close it, motivate the feed rolls by the second chain section, drive the mirror by the leading first chain to its second position, drive the feed rolls by the second chain section, actuate a second switch to operate the cutter so that a copy sheet is advanced through the charger to the focal plane, actuate a third switch to initiate a timer which energizes the lamp and stops the copy sheet advance at the focal plane for an exposure interval, returns the mirror to its first position by the trailing first chain section and actuates the first switch to open it and stop the chain to complete the cycle.
Inventors
- 👤 H Suzuki
- 👤 K Maeda
- 👤 K Nakatani
- 👤 K Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:51
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/26
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
257 words
A viewing and electrostatic copying machine comprising a viewing section, an electrostatic copying section including an electrostatic charging means, an electrostatic image developing means and means for advancing copy paper from said charging means along an image focal plane to said developing means, means including a mirror moveable between a retracted and an advanced position for alternatively projecting an image of an original to said viewing section or to said copying section focal plane, means for delivering copy paper to said copying section, a drive and timing sprocket chain traversing a predetermined run, selectively actuated drive means for cycling said sprocket chain, transfer means motivated by said sprocket chain for successively advancing and retracting said mirror at spaced intervals during a cycle of said sprocket chain and including a pair of longitudinally spaced first sprocket chain sections carried by and transversely offset from said endless sprocket chain, a sprocket wheel located in the path of and successively engageable and rotatable by said sprocket chain sections at spaced intervals and means for swinging said mirror between said advanced and retracted positions with the rotation of said sprocket wheel, means on said sprocket chain for motivating said copy paper delivery means, an actuating element carried by said sprocket chain and means including a first switch actuated by said actuating element at a predetermined position for exposing copy paper supported at said focal plane to an image of said original for a predetermined time in response To the actuation of said switch while said mirror is in said advanced condition.
Claim 2
Dependent Claim
257 words
A viewing and electrostatic copying machine comprising a viewing section, an electrostatic copying section including an electrostatic charging means, an electrostatic image developing means and means for advancing copy paper from said charging means along an image focal plane to said developing means, means including a mirror moveable between a retracted and an advanced position for alternatively projecting an image of an original to said viewing section or to said copying section focal plane, means for delivering copy paper to said copying section, a drive and timing sprocket chain traversing a predetermined run, selectively actuated drive means for cycling said sprocket chain, transfer means motivated by said sprocket chain for successively advancing and retracting said mirror at spaced intervals during a cycle of said sprocket chain and including a pair of longitudinally spaced first sprocket chain sections carried by and transversely offset from said endless sprocket chain, a sprocket wheel located in the path of and successively engageable and rotatable by said sprocket chain sections at spaced intervals and means for swinging said mirror between said advanced and retracted positions with the rotation of said sprocket wheel, means on said sprocket chain for motivating said copy paper delivery means, an actuating element carried by said sprocket chain and means including a first switch actuated by said actuating element at a predetermined position for exposing copy paper supported at said focal plane to an image of said original for a predetermined time in response To the actuation of said switch while said mirror is in said advanced condition.
Claim 3
Dependent Claim
49 words
The machine of claim 1 comprising a second switch actuated by said actuating element at a predetermined position and a paper cutter located in the path of said paper between said paper delivery means and said copying section and actuated in response to the actuation of said second switch.
Claim 4
Dependent Claim
70 words
The machine of claim 1 wherein said copy paper delivery means comprises a pair of parallel adjacent feed rolls, a sprocket wheel mounted on one of said feed rolls and a second sprocket chain section carried by said endless sprocket chain and differently transversely offset thereon relative to said first sprocket chain sections and moveable into drive engagement with said sprocket wheel to rotate said drive rolls a predetermined interval.
Claim 5
Dependent Claim
81 words
The machine of claim 1 wherein said exposing means comprises an original illuminating lamp, a conveying means for transporting a copy paper along said focal plane, a timer, means responsive to the initiation of said timer for energizing said lamp and stopping said conveying means, means responsive to said timer following a predetermined interval from the initiation thereof for deenergizing said lamp and actuating said conveying means, and means responsive to the actuation of said first switch for actuating said timer.
Claim 6
Dependent Claim
50 words
The machine of claim 1 wherein said transfer means and said paper delivery means comprise longitudinally spaced sprocket chain sections carried by said endless sprocket chain and said transfer means and said paper delivering means each comprises a sprocket wheel located in the path of a corresponding sprocket chain section.
Claim 7
Dependent Claim
64 words
The machine of claim 5 wherein said cycling means comprises a motor, a sprocket wheel driven by said motor and engaging said endless sprocket chain, and means including a normally closed switch connecting said motor to a source of current, said actuating element carried by said endless sprocket chain being moveable therewith to a position actuating said normally closed switch to an open condition.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |