Patent US4378156A successfully refreshed from Google Patents.
US4378156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of eliminating black banding occurring in the process of recording compound information
Assignee: Konica Minolta Inc
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Filing: 1980-05-28
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Granted: 1983-03-29
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Expires: 2000-05-28
Abstract
Abstract A method of eliminating black banding occurring along the boundary line of an exterior information signal image and a pictorial original image in the process of recording compound information includes control of the luminance intensity of a scanning reproducing device immediately prior to and/or immediately following external information transfer thereby onto the photosensitive receiving surface. Such control provides gradual, timed increase of the luminance intensity of the device immediately prior to normal activation thereof, and/or gradual, timed decrease of the luminance intensity of the device immediately following normal deactivation thereof, so as to predeterminately merge the compounded images and thereby eliminate the black banding phenomenon.
Inventors
- 👤 Tatsuo Yajima
- 👤 Hiroya Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:21
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/04018; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/6214; G03G15/043
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
In a method for forming a composite image on a photosensitive substance and for developing the composite image for transfer to a recording sheet, wherein the composite image is comprised of external information supplied to a reproduction device in the form of an electric signal for transfer to the photosensitive substance as an outputted external information signal image and an original for optical projection of an image thereof through an operable shutter onto the photosensitive substance contiguous with the external information signal image, the improvement comprising a method of eliminating black banding between the contiguous images as recorded on a recording sheet, comprising the steps of: generating a change-over signal to open the shutter following external information signal image transfer to the photosensitive substance or to close the shutter preceding external information signal image transfer to the photosensitive substance; and smoothly varying the output of the reproduction device between no signal image output and full signal image output in response to said change-over signal.
Claim 2
Dependent Claim
164 words
In a method for forming a composite image on a photosensitive substance and for developing the composite image for transfer to a recording sheet, wherein the composite image is comprised of external information supplied to a reproduction device in the form of an electric signal for transfer to the photosensitive substance as an outputted external information signal image and an original for optical projection of an image thereof through an operable shutter onto the photosensitive substance contiguous with the external information signal image, the improvement comprising a method of eliminating black banding between the contiguous images as recorded on a recording sheet, comprising the steps of: generating a change-over signal to open the shutter following external information signal image transfer to the photosensitive substance or to close the shutter preceding external information signal image transfer to the photosensitive substance; and smoothly varying the output of the reproduction device between no signal image output and full signal image output in response to said change-over signal.
Claim 3
Dependent Claim
51 words
In the method of claim 1 wherein the reproduction device is a scanning reproducing device, the output of which is projected onto the photosensitive surface, said step of smoothly varying the output of the reproduction device comprising smoothly varying an input to a luminance regulating circuit of the scanning reproducing device.
Claim 4
Dependent Claim
55 words
In the method of claim 2, said step of smoothly varying the input to the luminance regulating circuit of the scanning reproducing device including predeterminately delaying the change-over signal, generating a delta wave in response to the delayed change-over signal, and feeding the delta wave to the luminance regulating circuit of the scanning reproducing device.
Claim 5
Dependent Claim
98 words
In the method of claim 1 wherein transfer of the external information signal image and projection of the original image onto the photosensitive substance in consecutive relation produces a gap between or an overlap of the otherwise contiguous images on the photosensitive substance, said method of eliminating black banding including generating a correcting signal in response to the change-over signal and feeding the correcting signal to the reproduction device to correspondingly vary its output in accordance therewith, said correcting signal comprising a voltage step for predeterminately extending or truncating the full image signal output of the reproducing device.
References Cited (Backward Citations)
US3681527A
Cited
US4042962A
Cited
GB1443371A
Cited
GB1514605A
Cited
GB1503047A
Cited
US4251152A
Cited
US4296423A
Cited
US4303332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |