US3904290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system alignment apparatus
Assignee: Xerox Corp
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Filing: 1974-02-04
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Granted: 1975-09-09
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Expires: 1994-02-04
Abstract
Abstract An apparatus in which the alignment of an optical system is displayed, thereby enabling misalignments therein to be corrected. The alignment apparatus, in conjunction with the optical system, generates a narrow sample light image. This sample light image is displayed so as to depict the optical system misalignment. Thereafter, the optical system is adjusted and a corrected sample light image produced. The corrected sample light image is once again displayed to insure that the optical system is in alignment.
Inventors
- 👤 Wayne L Kidd
- 👤 Stephen C Corona
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:16
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/043; G03G15/0435
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
An electrophotographic printing machine, including: a movable frame member; a light source mounted on said frame member; lens means arranged to create a light image from the light rays transmitted thereto; an alignment member in a light receiving relationship with the light rays transmitted from said light source, said alignment member being adapted to reflect light rays therefrom to said lens means for creating a sample light image therefrom; and means for indicating the position of the sample light image so as to determine alignment of the optical system, said indicating means being in a light receiving relationship with the sample light image transmitted through said lens means.
Claim 2
Dependent Claim
108 words
An electrophotographic printing machine, including: a movable frame member; a light source mounted on said frame member; lens means arranged to create a light image from the light rays transmitted thereto; an alignment member in a light receiving relationship with the light rays transmitted from said light source, said alignment member being adapted to reflect light rays therefrom to said lens means for creating a sample light image therefrom; and means for indicating the position of the sample light image so as to determine alignment of the optical system, said indicating means being in a light receiving relationship with the sample light image transmitted through said lens means.
Claim 3
Dependent Claim
70 words
A printing machine as recited in claim 1, wherein said light source includes at least one substantially elongated tubular member having a substantially opaque region extending over a portion of the exterior circumferential surface thereof from about one end portion of said tubular member to about the other end region thereof, and a substantially transparent region extending over the remaining portion of the exterior circumferential surface of said tubular member.
Claim 4
Dependent Claim
16 words
A printing machine as recited in claim 1, further including means for moving said frame member.
Claim 5
Dependent Claim
42 words
A printing machine as recited in claim 3, wherein said alignment member includes a first sheet member having a pair of longitudinally extending light absorbing regions with a light reflecting region interposed therebetween, said sheet member being mounted on said frame member.
Claim 6
Dependent Claim
56 words
A printing machine as recited in claim 4, wherein said indicating means includes a second sheet member having a calibration mark thereon, said second sheet member being positioned to receive the sample light image formed from the light rays reflected from the light reflecting region of said first sheet member and transmitted through said lens means.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |