Patent US3900256A successfully refreshed from Google Patents.
US3900256A
Expired / Lapsed
US
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Electrostatic copying machine and synchronizing control system therefor
Assignee: TIM SpA
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Filing: 1974-06-21
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Granted: 1975-08-19
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Expires: 1994-06-21
Abstract
Abstract An electrostatic book-copier machine includes a movable carriage on which an original document is positioned for reproducing it onto a simultaneously moving length of copy paper. Cams are provided for timing the copying cycle and for synchronizing the movements of the carriage and of the copy paper with the actuation of the corona charging device and of the exposure lamp. Spring means are also provided for speeding up the return of the carriage to the home position upon completion of any copy cycle.
Inventors
- 👤 Giovanni Ravera
- 👤 Giorgio Siletto
- 👤 Carlo Bellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
258 words
An electrostatic copying machine of the type having a motor, a first transport system actuated by the motor for transporting an original along a scanning zone past an illuminating system, a second transport system actuated by the motor for transporting a copy sheet fed from a feed station through a corona-effect electrostatic charging device and through an exposure zone at which an image of the original is formed by an optical system, means for synchronizing the movement of the said first and second transport systems and for co-ordinating the actuation of the charging device and illuminating system with the movement of the first transport system, said means comprising in combination: a first cam actuated by the motor, a second cam integral with said first cam and movable therewith, a third can integral with said second cam and movable therewith, a clutch device movable into a first operative position of transmission of the motion from the motor to said first cam and into a second position of non-transmission of the motion from the motor to said first cam, a key for effecting the movement of said clutch device into its first operative position and for switching on the corona changing device, means actuated by said first cam for transmitting the motion from the motor to the first transport system and for activating the illuminating system, means actuated by said second cam for feeding the copy sheet to the second transport system; and means actuated by said third cam for causing said clutch device to move into its second position.
Claim 2
Dependent Claim
258 words
An electrostatic copying machine of the type having a motor, a first transport system actuated by the motor for transporting an original along a scanning zone past an illuminating system, a second transport system actuated by the motor for transporting a copy sheet fed from a feed station through a corona-effect electrostatic charging device and through an exposure zone at which an image of the original is formed by an optical system, means for synchronizing the movement of the said first and second transport systems and for co-ordinating the actuation of the charging device and illuminating system with the movement of the first transport system, said means comprising in combination: a first cam actuated by the motor, a second cam integral with said first cam and movable therewith, a third can integral with said second cam and movable therewith, a clutch device movable into a first operative position of transmission of the motion from the motor to said first cam and into a second position of non-transmission of the motion from the motor to said first cam, a key for effecting the movement of said clutch device into its first operative position and for switching on the corona changing device, means actuated by said first cam for transmitting the motion from the motor to the first transport system and for activating the illuminating system, means actuated by said second cam for feeding the copy sheet to the second transport system; and means actuated by said third cam for causing said clutch device to move into its second position.
Claim 3
Dependent Claim
74 words
A copying machine according to claim 1, wherein the first transport system receives its motion from the motor through a plurality of gears, a movable one of which is movable between an operative position and a position of disengagement from the rest of said plurality, said means actuated by said first cam comprising a lever system controlling the passage of said movable gear between the said position of disengagement and the said operative position.
Claim 4
Dependent Claim
154 words
A copying machine according to claim 2, wherein the first transport system comprises a carriage movable on the body of the machine in sequence between an inoperative position, a first working position and a second working position, the inoperative position being intermediate between the first and second working positions, the movement of the carriage during the execution of a copying cycle being constituted by a first travel between the inoperative position and the first working position, a second travel from the first working position to the said second working position, during which the light image of the original transported along the scanning zone is formed on the copy sheet which is simultaneously moved through the exposure zone, and a third travel from the second working position to the inoperative position, said movable gear being in the operative position during the second travel and in the position of disengagement during the first and third travels.
Claim 5
Dependent Claim
73 words
A copying machine according to claim 3, further comprising: a first element fast with the carriage which co-operates with a first stop connected to the body of the machine when the carriage is stationary in the inoperative position, a spring partially loaded when the carriage is in its inoperative position which imparts the movement to the carriage during the first and third travels; and means for loading said spring during said second travel.
Claim 6
Dependent Claim
55 words
A copying machine according to claim 4, further comprising: a second element borne by the carriage and co-operating during the second travel with said lever system for shifting said movable gear from said operative position to said position of disenGagement, to produce the execution of the third travel and for switching off the illuminating system.
Claim 7
Dependent Claim
99 words
A copying machine according to claim 5, wherein the feed station comprises means for feeding copy sheets from a roll, and further comprising: a selector for the length to which the copy sheet is to be cut from the roll borne by the carriage and including a third element movable therewith, a second stop connected to the body of the machine and co-operating with said third element for defining said first working position, to vary the length of the said first travel proportionally with the variation in the length of the copy sheet set by means of the selector.
Claim 8
Dependent Claim
44 words
A copying machine according to claim 6, further comprising: an actuatable device for cutting the copy sheet from the roll during the said second travel, and a fourth element carried by the carriage and fixed thereto for actuating said device during said second travel.
Claim 9
Dependent Claim
91 words
A copying machine according to claim 5, wherein the feed station comprises means for feeding copy sheets from a roll, further comprising: a supplementary feed station for an off-size copy sheet including a tray withdrawable from the body of the machine, activatable means for feeding the off-size copy sheet placed in said tray in the withdrawn position, a fourth cam integral with said first, second and third cams for activating said activatable means for feeding, and means for disenabling the actuation of the third cam upon the withdrawal of the tray.
Claim 10
Dependent Claim
138 words
A copying machine according to claim 4, wherein a setting element for the number of copies to be made which is present in the machine and is positionable for the execution of a single copying cycle or a predetermined number of copying cycles or for the continuous execution of copying cycles and further comprising: a lever system for the removal of the first stop connected to the body of the machine from the path of the first element fast with the carriage for each position of the setting element different from that for the execution of a single copying cycle, the said third and first travels constituting for each position of the setting element different from that for the execution of a single copying cycle a single travel from the second working position to the first working position.
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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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |