US4711566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electronic scanning and microfilming of documents
Assignee: 3M Co
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Filing: 1985-10-31
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Granted: 1987-12-08
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Expires: 2005-10-31
Abstract
Abstract Apparatus using a single document transport means for microfilming the document and scanning the document for obtaining digital signals for storage that are indicative of the image carried on the document. One embodiment provides for sequential presentment of the document for filming and scanning. Another embodiment provides for simultaneous filming and scanning. Circuitry is disclosed by which the digital signals are processed for use in controlling the light source used for filming of the document. Circuitry is disclosed for supplying information for later retrieval of the digital signals and/or the microfilm for a particular document.
Inventors
- 👤 Bruce M. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:47
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/21; H04N1/2166; H04N1/217; H04N1/2175; G; G03; G03B; G03B27/00; G03B27/72; G03B27/80; H04N1/04; H04N1/12; H04N1/121; H04N1/1215; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/0077; H04N2201/0081; H04N2201/0089
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
Apparatus for storing documents on microfilm and for obtaining digital signals representative of the image present on a document for storage in a memory, including: a document transport means providing a movable surface for receiving a document; a light responsive electronic scanning array; a microfilm camera; and optical means for exposing a document to light when carried by said document transport means, said optical means including a beam splitter mirror for directing the light reflected from the document to said light responsive electronic scanning means for the generation of digital signals representative of the image carried on the document and to said microfilm camera for exposure of film in accordance with the light directed to said microfilm camera.
Claim 2
Dependent Claim
118 words
Apparatus for storing documents on microfilm and for obtaining digital signals representative of the image present on a document for storage in a memory, including: a document transport means providing a movable surface for receiving a document; a light responsive electronic scanning array; a microfilm camera; and optical means for exposing a document to light when carried by said document transport means, said optical means including a beam splitter mirror for directing the light reflected from the document to said light responsive electronic scanning means for the generation of digital signals representative of the image carried on the document and to said microfilm camera for exposure of film in accordance with the light directed to said microfilm camera.
Claim 3
Dependent Claim
226 words
Apparatus for storing documents on microfilm and for obtaining signals representative of the image present on a document for storage in a memory, including: a document transport means providing a movable surface for receiving a document; a light responsive electronic scanning array; a microfilm camera; optical means, including two light sources, for first exposing a document to light from one of said two light sources when carried by said document transport means and directing the light reflected from the document to said light responsive electronic scanning means for the generation of digital signals representative of the image carried on the document and then exposing the document to light from the other of said two light sources and directing the light reflected from the document to said microfilm camera for exposure of film in accordance with the light directed to said microfilm camera; an adjustable power supply for said other of said two light sources; and means connected between said light responsive electronic scanning means and said adjustable power supply for adjusting the output of said adjustable power supply according to the average of the output of said light responsive electronic scanning means whereby the intensity of said other of said two light sources providing light to said microfilm camera is varied in accordance with the average of said output of said light responsive electronic scanning means.
Claim 4
Dependent Claim
226 words
Apparatus for storing documents on microfilm and for obtaining signals representative of the image present on a document for storage in a memory, including: a document transport means providing a movable surface for receiving a document; a light responsive electronic scanning array; a microfilm camera; optical means, including two light sources, for first exposing a document to light from one of said two light sources when carried by said document transport means and directing the light reflected from the document to said light responsive electronic scanning means for the generation of digital signals representative of the image carried on the document and then exposing the document to light from the other of said two light sources and directing the light reflected from the document to said microfilm camera for exposure of film in accordance with the light directed to said microfilm camera; an adjustable power supply for said other of said two light sources; and means connected between said light responsive electronic scanning means and said adjustable power supply for adjusting the output of said adjustable power supply according to the average of the output of said light responsive electronic scanning means whereby the intensity of said other of said two light sources providing light to said microfilm camera is varied in accordance with the average of said output of said light responsive electronic scanning means.
References Cited (Backward Citations)
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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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |