Patent US3746443A successfully refreshed from Google Patents.
US3746443A
Expired / Lapsed
US
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Magnetically controlled machine programmer
Assignee: Eastman Kodak Co
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Filing: 1971-09-27
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Granted: 1973-07-17
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Expires: 1991-09-27
Abstract
Abstract A machine programmer is provided for controlling work performed on a work piece which moves through separate work stations wherein a shift register selectively energizes and deenergizes the work stations in response to movement of the work. The shift register includes a multisectioned cylinder divided into individual light-tight sectors, each having a slot along the periphery of the cylinder through which light can pass, and is rotatably driven by an endless photoconductive member. Each sector has a switching circuit which includes a lamp and a photosensitive device. When it is desired to make electrophotographic copies of an original, the lamp is turned on by an input signal from an electromagnet adjacent the cylinder which is energized in accordance with the number of copies to be made. As each sector moves along a circular path past the electromagnet, a reed switch is operated to turn on the lamp, whose light by means of a photosensitive device maintains the circuit, and hence the lamp itself, in activated condition. As the cylinder is rotated the light in each lighted sector activates a series of photosensitive devices spaced around the cylinder to energize circuits connected to electrophotographic stations along the path of the photoconductive element in response to movement of the photoconductive element to make copies of the original.
Inventors
- 👤 L Hickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:36
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/12; G05B19/124; G03; G03G; G03G21/00; G03G21/14; G03G21/145; G05B19/06; G05B19/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
358 words
In electrophotographic apparatus having an elongated electrosensitive member defining a plurality of selectable image areas and movable along an endless first path, the combination comprising: a. a plurality of electrophotographic work stations located along said path including an actuable exposure station operative when actuated for exposing a selected image area of said member to a light image to form a latent electrostatic image, a development station for applying toner to such electrostatic images on said member to form toner images, and an actuable transfer station operative when actuated for transferring a toner image on a selected image area of said member to a receiving medium; b. means defining a second predetermined path; and c. means movable along said second path for sequentially actuating and de-actuating said exposure and transfer stations in accordance with a predetermined sequence in timed relation to movement of said member past said stations to effect sequential operation of said exposure and transfer stations with respect to a selected image area during movement around said endless path, said sequential means being effective to simultaneously produce at least two of such predetermined sequences of work station actuations to form at least two latent electrostatic images in selected image areas respectively prior to completing the transfer of the toner image corresponding to the first of such two formed latent electrostatic images to a receiving medium, said sequential means includes an element movable along said second predetermined path; an actuable first source of energy positioned along said second path; an actuable second source of energy on said element; means for activating said first energy source; first energy sensor means on said element responsive to said first energy source upon movement of said element along said second path past said first energy source to activate said second energy source; and second energy sensor means disposed along said second path and spaced from said first energy source and coupled to at least one particular work station for causing said particular work station to perform a work operation on said member in response to energy from said second energy source upon movement of said element past said second energy sensor means.
Claim 2
Dependent Claim
358 words
In electrophotographic apparatus having an elongated electrosensitive member defining a plurality of selectable image areas and movable along an endless first path, the combination comprising: a. a plurality of electrophotographic work stations located along said path including an actuable exposure station operative when actuated for exposing a selected image area of said member to a light image to form a latent electrostatic image, a development station for applying toner to such electrostatic images on said member to form toner images, and an actuable transfer station operative when actuated for transferring a toner image on a selected image area of said member to a receiving medium; b. means defining a second predetermined path; and c. means movable along said second path for sequentially actuating and de-actuating said exposure and transfer stations in accordance with a predetermined sequence in timed relation to movement of said member past said stations to effect sequential operation of said exposure and transfer stations with respect to a selected image area during movement around said endless path, said sequential means being effective to simultaneously produce at least two of such predetermined sequences of work station actuations to form at least two latent electrostatic images in selected image areas respectively prior to completing the transfer of the toner image corresponding to the first of such two formed latent electrostatic images to a receiving medium, said sequential means includes an element movable along said second predetermined path; an actuable first source of energy positioned along said second path; an actuable second source of energy on said element; means for activating said first energy source; first energy sensor means on said element responsive to said first energy source upon movement of said element along said second path past said first energy source to activate said second energy source; and second energy sensor means disposed along said second path and spaced from said first energy source and coupled to at least one particular work station for causing said particular work station to perform a work operation on said member in response to energy from said second energy source upon movement of said element past said second energy sensor means.
References Cited (Backward Citations)
US2918853A
Cited
US3606532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |