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US 4,179,211 AGranted
Electrostatic photographic copying machine
AssigneeMita Industrial Co., Ltd.
InventorsHiroshi Kimura, Takaich Kitagawa, Masahiko Hisajima, Shoji Yoshikado, Tatsuo Aizawa
Life of this patent
Estimating the term…
Abstract
An electrostatic photographic copying machine includes a device for automatically exchanging used master paper with fresh master paper on a master holding body, and for indicating when such an exchange should be initiated. The machine includes an apparatus for cleaning the fixing roller, an apparatus for adjusting the amount of toner supplied to the developer, a transfer device whereby improper discharge is prevented, a transfer paper jam detector, and a device for improved mixing of developer.
Claims102
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- and
- means for rotating said master holding body in a first forward direction during normal operation of the machine and during feeding of said new master paper to said master holding body and in a second reverse direction during removal of said master paper from said master holding body.
7 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- and
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted, said indicating means comprising a first gear, turning means operable by said counting means for turning said first gear by one pitch for each copying operation, a second gear operably meshing with said first gear to be turned by one pitch as said first gear is turned by a predetermined number of pitches, a third gear meshing with said second gear to be turned thereby, an indicator on said third gear movable to an exchange indicating position, and means for returning said third gear from said indicating position to an original position upon operation of said feeding means to exchange master paper.
7 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted;
- engaging means on said master holding body for engaging a forward end of master paper being supplied thereto by said master paper feeding means;
- and
- said master paper removing means comprising scraping means for scraping the rear end of master paper from said master holding body, and discharging means to discharge the thus scraped master paper from said master holding body.
9 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted;
- and
- engaging means on said master holding body for engaging a forward end of master paper being supplied thereto by said master paper feeding means, said engaging means comprising a restraining member having a stopper to restrain the front end of said master paper fed onto said master holding body by said feeding means, and a guide member means provided on said restraining member for guiding said front end of master paper to a prescribed position during attachment of said master paper and for promoting separation of said front end of master paper from said stopper during removal of said master paper.
8 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted;
- counting mechanism means for counting the number of copying operations;
- and
- means for cleaning a fixing roller of said fixing apparatus, said cleaning means comprising a cleaning cloth and means operable by said counting mechanism means for replacing said cloth when said counting mechanism means counts a prescribed number of copying operations.
9 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted;
- and
- a suction-type separating drum to separate transfer paper from said master paper and arranged at a position spaced by a predetermined distance from said surface of said master holding body, and an elastic expanded portion projecting from said surface at a position adjacent the end of said transfer paper, said portion facilitating separation of said transfer paper from said master holding body by cooperation with suction of said separating drum.
8 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus, including toner supply means and means for adjusting the amount of toner supplied thereto, and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- and
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted.
7 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted;
- and
- said transfer apparatus comprising a shield casing having a first opening facing said master holding body, at least one fine corona discharge wire positioned within said casing, said casing having a second opening therein at a side thereof opposite said first opening, and a toner receiver mounted at a positioned opposed to said second opening and spaced from said shield casing, said toner receiver being removably attached to the body of the machine.
8 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a development apparatus and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted;
- and
- a movable original paper mounting table, and means for detecting jamming of said transfer paper, said jamming detecting means comprises a first detector to detect the amount of movement of said original paper mounting table from a starting position, a second detector to detect the amount of rotary movement of said master holding body, a third detector positioned downstream of said fixing apparatus to detect the existence of transfer paper, and electric circuit means for generating a paper jamming signal when said first detector and said second detector are operated normally and said third detector detects the absence of transfer paper.
8 more elements
An electrostatic photographic copying machine comprising:
- a rotatable master holding body adapted to have attached to the peripheral surface thereof an electrostatic photographic sensitive master paper;
- a charging apparatus, a magnetic brush development apparatus provided with a magnetic brush roller and a transfer apparatus positioned along the passage of rotation of said surface of said master holding body;
- an optical system to project an image of a copying original paper onto the surface of said master paper charged by said charging apparatus;
- a transfer paper carrying passage to supply transfer paper to said transfer apparatus and to discharge transfer paper therefrom at a position whereat said image is transferred from said master paper to said transfer paper;
- a fixing apparatus to fix the transferred image onto said transfer paper;
- a master paper supply;
- means for removing master paper from said surface of said master holding body;
- means for feeding new master paper from said supply to said surface of said master holding body to replace the removed master paper;
- counting means for counting the number of copying operations of the master paper on said master holding body, and means operable by said counting means for indicating the need for exchanging master paper attached to said master holding body when a prescribed number of copying operations counted by said counting means have been counted;
- and
- a rotary agitator to agitate and mix development agent consisting of toner and carrier, said agitator including an intermediate part in the lengthwise direction thereof formed by an agitating vane, and opposite end parts formed by spiral members to carry development agent toward said intermediate part.
8 more elements
Dependencies are inferred from the claim text.