US4072415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus of generating control signals for controlling an operation of an electrophotographic copying machine
Assignee: Katsuragawa Electric Co Ltd
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Filing: 1976-08-26
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Granted: 1978-02-07
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Expires: 1996-08-26
Abstract
Abstract An apparatus of generating control signals for an electrophotographic copying machine which is provided with a disk fixed to a rotary shaft of a photosensitive drum and having through-holes formed therein, a light emitting device arranged to be opposed to a photosensitive device through the disk to form binary coded light signals and a decoder connected to the photosensitive device to decode the light signals therefrom. As the disk rotates together with the photosensitive drum, the photosensitive device sequentially senses a plurality of binary coded light signals to operate desired devices of the electrophotographic copying machine.
Inventors
- 👤 Kazuya Inoue
- 👤 Yukio Katano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:56
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/14; G03G21/145
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
179 words
An apparatus of generating control signals for controling an operation of an electrophotographic copying machine of the type wherein said control signals are generated in timed relationship with rotation of a photosensitive drum disposed in said copying machine, the improvement comprising a disk having through-holes therein and driven in association with said photosensitive drum, a light emitting device, a photosensitive device spaced apart from said light emitting device to sense binary coded light signals formed by said light emitting device and said through-holes of said disk and a decoder connected to said photosensitive device, said disk having a strobe section for strobe through-holes and a plurality of code sections for code through-holes associated with said strobe through-holes, said strobe section and said code sections being formed in outer and inner radial portions, respectively, of said disk, and the arrangement being such that as said disk rotates said strobe and code through-holes are, in operation, brought into registration with the path of light from said light emitting device to said photosensitive device to permit light to pass through said through-holes.
Claim 2
Independent Claim
179 words
An apparatus of generating control signals for controling an operation of an electrophotographic copying machine of the type wherein said control signals are generated in timed relationship with rotation of a photosensitive drum disposed in said copying machine, the improvement comprising a disk having through-holes therein and driven in association with said photosensitive drum, a light emitting device, a photosensitive device spaced apart from said light emitting device to sense binary coded light signals formed by said light emitting device and said through-holes of said disk and a decoder connected to said photosensitive device, said disk having a strobe section for strobe through-holes and a plurality of code sections for code through-holes associated with said strobe through-holes, said strobe section and said code sections being formed in outer and inner radial portions, respectively, of said disk, and the arrangement being such that as said disk rotates said strobe and code through-holes are, in operation, brought into registration with the path of light from said light emitting device to said photosensitive device to permit light to pass through said through-holes.
Claim 3
Dependent Claim
27 words
An apparatus according to claim 1 in which said light emitting device comprises a single light emitting source substantially extending to face a radius of said disk.
Claim 4
Dependent Claim
24 words
An apparatus according to claim 1 in which said light emitting device irradiates infrared rays and said photosensitive device is sensitive to that rays.
Claim 5
Dependent Claim
42 words
An apparatus according to claim 1 in which the angle defined by radial lines by lying on opposite ends, respectively, of said strobe through-hole is smaller than the angle defined by radial lines lying on opposite ends, respectively, of said code through-holes.
Claim 6
Dependent Claim
26 words
An apparatus according to claim 1 in which said disk is provided with an adjusting device for adjusting an effective opening area of the strobe through-hole.
Claim 7
Dependent Claim
53 words
An apparatus according to claim 5 in which said adjusting device includes a control plate adjustably fixed to said disk and having an aperture brought into registration with said strobe through-hole, and the arcuate length of said aperture is shaped to define the opening area of said strobe through-hole to an intended dimension.
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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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |