US3754822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning system
Assignee: Xerox Corp
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Filing: 1971-02-26
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Granted: 1973-08-28
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Expires: 1991-02-26
Abstract
Abstract An optical scanning system for minimizing the time required for exposing information on a document to a continuously moving photosensitive member, having a moving transparent platen which supports the document in a plane parallel to the photosensitive member and transports the document in the same direction and at the same speed as that of the photosensitive member, and a scanning device including a lamp and lens movably disposed between the document and photosensitive member which, during exposure of the photosensitive member, moves in the direction opposite the direction of the document and photosensitive member. The system, in one embodiment, includes a photosensitive member in the form of an endless belt which is exposed in a flat plane and a charging device attached to the scanning device which is adapted to deposit an electrostatic charge on the belt immediately prior to the belt being exposed to the light pattern.
Inventors
- 👤 L Melrose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:14
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/522; G03B27/525
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
Apparatus for recording an image of an original upon an image retaining element including means to move the image recording element along a first path of travel, means to move the original along a second path of travel in fixed timed relation with said image recording member wherein there is no relative movement therebetween, a scanning device interposed between the image recording element and the original, said scanning device being arranged to focus an image of the original upon said image retaining element, and means to move said scanning device in opposition to the direction of movement of said image retaining element and said original whereby a flowing light image of the original is recorded on the image retaining element.
Claim 2
Dependent Claim
120 words
Apparatus for recording an image of an original upon an image retaining element including means to move the image recording element along a first path of travel, means to move the original along a second path of travel in fixed timed relation with said image recording member wherein there is no relative movement therebetween, a scanning device interposed between the image recording element and the original, said scanning device being arranged to focus an image of the original upon said image retaining element, and means to move said scanning device in opposition to the direction of movement of said image retaining element and said original whereby a flowing light image of the original is recorded on the image retaining element.
Claim 3
Dependent Claim
34 words
The apparatus of claim 1 wherein said means to move the scanning device is arranged to move the scanning device along a path of travel substantially parallel to that of the image retaining element.
Claim 4
Dependent Claim
18 words
The apparatus of claim 2 including further means to restore the apparatus to a start of scan position.
Claim 5
Independent Claim
171 words
An apparatus for exposing a photosensitive member to a light pattern conforming to information on an original document, or the like, comprising: a. a photosensitive member; b. means to move the photosensitive member along a plane in a predetermined direction at a predetermined speed; c. transparent means to support the original document adjacent the photosensitive member in a plane parallel to that along which the photosensitive member moves; d. means to move the transparent means along a plane parallel to the plane of movement of the photosensitive member in the predetermined direction at the predetermined speed; e. a scanning device between the transparent means and photosensitive member having means to illuminate the original document on the transparent means increment by increment and means to focus the reflected light pattern onto the surface of the photosensitive member; and f. means to move the scanning device parallel to the transparent means and photosensitive member in the direction opposite to the predetermined direction to form an image of the document on the photosensitive member.
Claim 6
Independent Claim
171 words
An apparatus for exposing a photosensitive member to a light pattern conforming to information on an original document, or the like, comprising: a. a photosensitive member; b. means to move the photosensitive member along a plane in a predetermined direction at a predetermined speed; c. transparent means to support the original document adjacent the photosensitive member in a plane parallel to that along which the photosensitive member moves; d. means to move the transparent means along a plane parallel to the plane of movement of the photosensitive member in the predetermined direction at the predetermined speed; e. a scanning device between the transparent means and photosensitive member having means to illuminate the original document on the transparent means increment by increment and means to focus the reflected light pattern onto the surface of the photosensitive member; and f. means to move the scanning device parallel to the transparent means and photosensitive member in the direction opposite to the predetermined direction to form an image of the document on the photosensitive member.
Claim 7
Dependent Claim
50 words
The apparatus in claim 4 wherein the scanning device includes a movable frame having at least one lamp mounted thereon to move immediately adjacent the transparent means and a lens means between the lamp and photosensitive member to focus the reflected light pattern onto the surface of the photosensitive member.
Claim 8
Dependent Claim
65 words
The apparatus in claim 5 wherein the photosensitive member is a photoconductive plate having a layer of photoconductive material over a conductive backing material, and, further including, a charging means mounted on the side of the frame facing the direction of movement of the scanning apparatus adapted to charge the photoconductive layer of the plate immediately prior to its being exposed to the light pattern.
Claim 9
Dependent Claim
38 words
The apparatus in claim 5 wherein the photosensitive member is a sheet of paper, or the like, having a photoconductive layer thereon facing the transparent means and the means to move the sheet is a sheet conveyor means.
Claim 10
Independent Claim
315 words
An apparatus for exposing a photosensitive member to a light pattern conforming to the information on an original document having an operating cycle including a scan phase and a return phase comprising: a. a photosensitive member b. means to move the photosensitive member along a plane in a predetermined direction at a predetermined speed; c. transparent means to support the original document adjacent the photosensitive member in a plane parallel to that of the photosensitive member; d. a scanning device between the transparent means and photosensitive member for illuminating an original document on the transparent means increment by increment and focusing the reflected light pattern onto the surface of the photosensitive member; e. means to move the transparent means along a plane parallel to the plane of movement of the photosensitive member in the predetermined direction at the predetermined speed between an initial position and an end-of-scan position, the initial position of the scanning device being such that it does not pass the leading edge of the document until after the scan phase has begun; f. means to move the scanning device parallel to the transparent means and photosensitive member between an initial position and an end-of-scan position; g. means to control the movement of the transparent means so that during the scan phase the transparent means moves in the same direction as the photosensitive member from its initial position to its end-of-scan position and during the return phase moves in the opposite direction as the photosensitive member from its end-of-scan position to its initial position; and h. means to control the movement of the scanning device so that during the scanning phase it moves in the direction opposite to that of the photosensitive member from its initial position to its end-of-scan position and during the return phase moves in the same direction as the photosensitive member from its end-of-scan position to its initial position.
Claim 11
Independent Claim
315 words
An apparatus for exposing a photosensitive member to a light pattern conforming to the information on an original document having an operating cycle including a scan phase and a return phase comprising: a. a photosensitive member b. means to move the photosensitive member along a plane in a predetermined direction at a predetermined speed; c. transparent means to support the original document adjacent the photosensitive member in a plane parallel to that of the photosensitive member; d. a scanning device between the transparent means and photosensitive member for illuminating an original document on the transparent means increment by increment and focusing the reflected light pattern onto the surface of the photosensitive member; e. means to move the transparent means along a plane parallel to the plane of movement of the photosensitive member in the predetermined direction at the predetermined speed between an initial position and an end-of-scan position, the initial position of the scanning device being such that it does not pass the leading edge of the document until after the scan phase has begun; f. means to move the scanning device parallel to the transparent means and photosensitive member between an initial position and an end-of-scan position; g. means to control the movement of the transparent means so that during the scan phase the transparent means moves in the same direction as the photosensitive member from its initial position to its end-of-scan position and during the return phase moves in the opposite direction as the photosensitive member from its end-of-scan position to its initial position; and h. means to control the movement of the scanning device so that during the scanning phase it moves in the direction opposite to that of the photosensitive member from its initial position to its end-of-scan position and during the return phase moves in the same direction as the photosensitive member from its end-of-scan position to its initial position.
Claim 12
Dependent Claim
31 words
The apparatus in claim 8 wherein the speed at which the transparent means and scanning device move during their respective return phases is faster than that during their respective scan phases.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |