US3749833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facsimile transmission system
Assignee: Pelorex Corp
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Filing: 1972-02-14
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Granted: 1973-07-31
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Expires: 1992-02-14
Abstract
Abstract A facsimile system for transferring graphical information between two remotely located machines each controlled to operate both as a transmitter and a receiver and comprising storage means in the form of an orbitally movable magnetic tape for retaining a magnetic image of graphical information to be transferred. An image forming means optically scans an input medium such as a document and forms a magnetic image on the tape of graphical information from the input medium when the machine is to transmit. Then a signal generating means scans the magnetic image on the tape and provides signals indicative of the graphical information for transmission by wire or radiowave. When the machine is to operate as a receiver, a signal detecting means receives transmitted signals indicative of graphical information, transforms the signals, and utilizes them to form a magnetic image of the graphical information on the tape. A transfer means applies magnetic toner particles to the magnetic image on the tape and then transfers the toner particles to a copy medium such as paper.
Inventors
- 👤 J Rait
- 👤 A Gilmour
- 👤 E Sellers
- 👤 E Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:34
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G19/00; H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/23; H04N1/27
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
247 words
A facsimile system for transferring graphical information between two locations, there being at each location apparatus selectively functioning as a transmitter and a receiver and comprising: a. storage means having a magnetizable surface for storing a magnetic image of graphical information to be transferred; b. image forming means for optically scanning an input medium containing graphical information to be transferred and magnetizing said surface in a manner forming a magnetic image of said graphical information on said surface of said storage means when the apparatus is to function as a transmitter; c. signal generating means for scanning a magnetic image on said surface of said storage means and providing output electrical signals indicative of said graphical information for transmission when the apparatus is to function as a transmitter; d. signal detecting means for receiving transmitted signs indicative of graphical information and forming a magnetic image of said graphical information on said surface of said storage means when the apparatus is to function as a receiver; e. transfer means for applying magnetic toner particles to a magnetic image on said surface of said storage means and for transferring said toner particles to a copy medium when the apparatus is to function as a receiver whereby the magnetic image remains on said surface of said storage means for producing additional copies; and f. coupling means selectively connected to said signal generating means and said signal detecting means for coupling the apparatus to a transmission medium between the two locations.
Claim 2
Dependent Claim
247 words
A facsimile system for transferring graphical information between two locations, there being at each location apparatus selectively functioning as a transmitter and a receiver and comprising: a. storage means having a magnetizable surface for storing a magnetic image of graphical information to be transferred; b. image forming means for optically scanning an input medium containing graphical information to be transferred and magnetizing said surface in a manner forming a magnetic image of said graphical information on said surface of said storage means when the apparatus is to function as a transmitter; c. signal generating means for scanning a magnetic image on said surface of said storage means and providing output electrical signals indicative of said graphical information for transmission when the apparatus is to function as a transmitter; d. signal detecting means for receiving transmitted signs indicative of graphical information and forming a magnetic image of said graphical information on said surface of said storage means when the apparatus is to function as a receiver; e. transfer means for applying magnetic toner particles to a magnetic image on said surface of said storage means and for transferring said toner particles to a copy medium when the apparatus is to function as a receiver whereby the magnetic image remains on said surface of said storage means for producing additional copies; and f. coupling means selectively connected to said signal generating means and said signal detecting means for coupling the apparatus to a transmission medium between the two locations.
Claim 3
Dependent Claim
100 words
Apparatus according to claim 1, wherein said signal generating means comprises: a. means for scanning a magnetic image on said storage means and having an output providing signals which are amplitude modulated in accordance with said graphical information; b. analog to digital converter means having an input connected to the output of said scanning means and an output; and c. modem means having an input connected to the output of said analog to digital converter means and an output connected to said coupling means for converting the output of said analog to digital converter means to a frequency modulated signal.
Claim 4
Dependent Claim
92 words
Apparatus according to claim 1, wherein said signal detecting means comprises: a. modem means having an input connected to said coupling means and an output for converting frequency modulated signals into digital signals; b. digital to analog converter means having an input connected to the output of said modem meaNs and an output providing signals which are amplitude modulated in accordance with said graphical information; and c. means for forming a magnetic image on said storage means and having an input connected to the output of said digital to analog converter means.
Claim 5
Dependent Claim
60 words
Apparatus according to claim 1, wherein said copy medium comprises paper and wherein said transfer means comprises means for placing said paper in contact with the surface of said storage means on which said toner particles are present and for causing relative movement between said surface and said paper whereby said particles leave said surface and adhere to said paper.
Claim 6
Dependent Claim
120 words
Apparatus according to claim 1, wherein said storage means is capable of supporting an electrostatic image and wherein said image forming means comprises: a. means for transforming an optical image of information on an original medium to an electrostatic image on said storage means; b. means for applying magnetic toner particles to said storage means in a manner such that said particles adhere to said storage means in the form of an image corresponding to the image already present thereon; and c. magnetic image forming means operatively associated with said storage means for magnetizing said storage means as determined by the location of said toner particles on said storage means to form a magnetic image corresponding to the electrostatic image.
Claim 7
Dependent Claim
56 words
Apparatus according to claim 5, wherein said magnetic image forming means comprises: a. magnetizing means for applying a continuous magnetic recording to said storage means; and b. demagnetizing means for selectively erasing said recording according to the location of said toner particles on said storage means to form a magnetic image corresponding to said electrostatic image.
Claim 8
Dependent Claim
86 words
Apparatus according to claim 6, wherein said storage means comprises an orbitally movable endless tape, said magnetizing means is located so as to apply said recording to the surface of said tape other than the surface to which said toner particles are adhered, and said demagnetizing means is located so as to apply an erase field toward the surface of said tape on which said toner particles are adhered, whereby said toner particles provide a magnetic shunt for the erase field to form said magnetic image.
Claim 9
Dependent Claim
63 words
Apparatus according to claim 5, wherein said storage means comprises an orbitally movable magnetically retentive member capable of surface magnetization, said member having a surface capable of supporting an electrostatic image, and wherein said apparatus further comprises motive means for causing relative displacement between said storage means and said optical image transforming means, said toner applying means and said magnetic image forming means.
Claim 10
Dependent Claim
243 words
In a facsimile system for transferring graphical information between two locations, means for transmitting signals indicative of said graphical information between said locations comprising: a. storage means being magnetizable and capable of supporting an electrostatic image; b. means for transforming an optical image of graphical information on an original medium to an electrostatic image on said storage means; c. means for applying magnetic toner particles to said storage means in a manner such that said particles adhere to said storage means in the form of an image corresponding to the image already present thereon; d. magnetic image forming means operatively associated with said storage means for magnetizing said storage means as determined by the location of said toner particles on said storage means to form a magnetic image corresponding to the electrostatic image; e. transfer means for transferring said toner particles from said storage means to a copy medium whereby a copy of the original is made and the magnetic image remains on said storage means; f. motive means for causing relative displacement between said storage means and said optical image transforming means, said tOner applying means, said magnetic image forming means and said transfer means; g. signal generating means for scanning the magnetic image on said storage means and providing output electrical signals indicative of said graphical information for transmission; and h. coupling means connected to said signal generating means for coupling the apparatus to a transmission medium between the two locations.
Claim 11
Dependent Claim
243 words
In a facsimile system for transferring graphical information between two locations, means for transmitting signals indicative of said graphical information between said locations comprising: a. storage means being magnetizable and capable of supporting an electrostatic image; b. means for transforming an optical image of graphical information on an original medium to an electrostatic image on said storage means; c. means for applying magnetic toner particles to said storage means in a manner such that said particles adhere to said storage means in the form of an image corresponding to the image already present thereon; d. magnetic image forming means operatively associated with said storage means for magnetizing said storage means as determined by the location of said toner particles on said storage means to form a magnetic image corresponding to the electrostatic image; e. transfer means for transferring said toner particles from said storage means to a copy medium whereby a copy of the original is made and the magnetic image remains on said storage means; f. motive means for causing relative displacement between said storage means and said optical image transforming means, said tOner applying means, said magnetic image forming means and said transfer means; g. signal generating means for scanning the magnetic image on said storage means and providing output electrical signals indicative of said graphical information for transmission; and h. coupling means connected to said signal generating means for coupling the apparatus to a transmission medium between the two locations.
Claim 12
Dependent Claim
56 words
Apparatus according to claim 9, wherein said magnetic image forming means comprises: a. magnetizing means for applying a continuous magnetic recording to said storage means; and b. demagnetizing means for selectively erasing said recording according to the location of said toner particles on said storage means to form a magnetic image corresponding to said electrostatic image.
Claim 13
Dependent Claim
84 words
Apparatus according to claim 10, wherein said storage means comprises an endless tape, said magnetizing means is located so as to apply said recording to the surface of said tape other than the surface to which said toner particles are adhered, and said demagnetizing means is located so as to apply an erase field toward the surface of said tape on which said toner particles are adhered, whereby said toner particles provide a magnetic shunt for the erase field to form said magnetic image.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |