Reader-printer for electrographs

Claim 2

A reader-printer for electrographs comprising paper feed means including a receptacle disposed in a main frame for receiving a pile of sensitive paper and for dispensing the sensitive paper one sheet after another from said receptacle, a charger for electrically charging the sensitive paper, an exposure station including suction means, means for developing exposed sensitive paper, a dryer for drying developed sensitive paper, guide means including a plurality of pairs of rollers and guides for leading the sensitive paper from said paper feed means into above-mentioned respective means and sending out the paper from an outlet; said reader-printer further comprising the belowmentioned means, disposed above the above-mentioned means: a film insert frame for placing a microfilm at a predetermined position, a light source located above said film insert frame and equipped with cooling means, a group of interchangeable lenses disposed below said film insert frame, a mirror movable relative to said group of interchangeable lenses, means including an optical system, including said mirror for projecting the image of the original on a screen in a reader section, and means including another optical system positioned in opposing relationship with said group of interchangeable lenses, for projecting the image of the original on said exposure station, the above-mentioned respective means including said light source being controlled by means including an auto-resetting circuit for returning said respective means to their normal state following a printing cycle.

Claim 3

A reader-printer for electrographs comprising paper feed means including a receptacle disposed in a main frame for receiving a pile of sensitive paper and for dispensing the sensitive paper one sheet after another from said receptacle, a charger for electrically charging the sensitive paper, an exposure station including suction means, means for developing exposed sensitive paper, a dryer for drying developed sensitive paper, guide means including a plurality of pairs of rollers and guides for leading the sensitive paper from said paper feed means into above-mentioned respective means and sending out the paper from an outlet; said reader-printer further comprising the below-mentioned means, disposed above the above-mentioned means: a film insert frame for placing a microfilm at a predetermined position, a light source located above said film insert frame and equipped with cooling means, a group of interchangeable lenses disposed below said film insert frame, a mirror movable relative to said group of interchangeable lenses, means including an optical system, including said mirror for projecting the image of the original on a screen in a reader section, and means including another optical system positioned in opposing relationship with said group of interchangeable lenses, for projecting the image of the original on said exposure station, the above-mentioned respective means including said light source being controlled by means including an auto-resetting circuit for returning said respective means to their normal state following a printing cycle.

Claim 4

A reader-printer for electrographs comprising paper feed means including a receptacle disposed in a main frame for receiving a pile of sensitive paper and for dispensing the sensitive paper one sheet after another from said receptacle, a charger for electrically charging the sensitive paper, an exposure station including suction means, means for developing exposed sensitive paper, a dryer for drying developed sensitive paper, guide means including a plurality of pairs of rollers and guides for leading the sensitive paper from said paper feed means into above-mentioned respective means and sending out the paper from an outlet; said reader-printer further comprising the below-mentioned means, disposed above the above-mentioned means: a film insert frame for placing a microfilm at a predetermined position, a light source located above said film insert frame and equipped with cooling means, a group of interchangeable lenses disposed below said film insert frame, a mirror movable relative to said group of interchangeable lenses, means including an optical system, including said mirror for projecting the image of the original on a screen in a reader section, and means including another optical system positioned in opposing relationship with said group of interchangeable lenses, for projecting the image of the original on said exposure station, the above-mentioned respective means including said light source being controlled by means including an auto-resetting circuit for returning said respective means to their normal state following a printing cycle.

Claim 5

The reader-printer as set forth in claim 1 wherein said auto-resetting circuit comprises a capacitor (C2) for continuously storing a voltage for energizing said resetting circuit while a switch (SW2) of a tertiary circuit is out of operation so as to keep the tertiary circuit energized even after the switch (SW2) is opened and a plurality of resistors for keeping the circuit voltage lower than the power source voltage and applying a very low current to transistors (T2) and (T3), whereby a relay (RY4) is turned off after the transistor (T3) is turned on and transistor (T2) is turned off by a voltage impressed by said capacitor (C2) and exceeding the circuit voltage.

Claim 6

The reader printer as set forth in claim 1 wherein said interchangeable lenses are of different focal lengths and comprising externally operable means for selecting and focussing said interchangeable lenses.

Claim 7

A reader-printer for electrographs comprising paper feed means including a receptacle disposed in a main frame for receiving a pile of sensitive paper and for dispensing said sensitive paper one sheet after another from said receptacle, a charger for electrically charging the sensitive paper, an exposure station including suction means, means for developing exposed sensitive paper, a dryer for drying developed sensitive paper, guide means including a plurality of pairs of rollers and guides for leading the sensitive paper from said paper feed means into the above-mentioned respective means and sending out the paper from an outlet; said reader-printer further comprising the below-mentioned means, disposed above the above-mentioned means: a filM insert frame for placing a microfilm at a predetermined position, a light source located above said film insert frame and equipped with cooling means, a group of interchangeable lenses disposed below said film insert frame, a mirror adapted to be moved relative to said group of interchangeable lenses, means comprising an optical system including said mirror and for projecting the image of the original on a screen in a reader section, and means including another optical system positioned in opposing relationship with said group of interchangeable lenses for projecting the image of the original on said exposure station; said reader-printer further comprising a lens interchanging mechanism composed of a slide plate carrying in a focus-adjustable manner at least five interchangeable lenses having different magnifications and at least one gear rotatable through drive means including belt and pulleys by a focusing member provided externally of said main frame, said slide plate being movable back and forth in a horizontal direction by an operating lever extending outward from said main frame and holding the selected lens in a predetermined position, said gear being engageable with rotary focusing gears mounted on the mounts of said interchangeable lenses so that said gear meshes with the focusing gear of said interchangeable lens which is selected and held in position.

Claim 8

A reader-printer for electrographs comprising paper feed means including a receptacle disposed in a main frame for receiving a pile of sensitive paper and for dispensing said sensitive paper one sheet after another from said receptacle, a charger for electrically charging the sensitive paper, an exposure station including suction means, means for developing exposed sensitive paper, a dryer for drying developed sensitive paper, guide means including a plurality of pairs of rollers and guides for leading the sensitive paper from said paper feed means into the above-mentioned respective means and sending out the paper from an outlet; said reader-printer further comprising the below-mentioned means, disposed above the above-mentioned means: a filM insert frame for placing a microfilm at a predetermined position, a light source located above said film insert frame and equipped with cooling means, a group of interchangeable lenses disposed below said film insert frame, a mirror adapted to be moved relative to said group of interchangeable lenses, means comprising an optical system including said mirror and for projecting the image of the original on a screen in a reader section, and means including another optical system positioned in opposing relationship with said group of interchangeable lenses for projecting the image of the original on said exposure station; said reader-printer further comprising a lens interchanging mechanism composed of a slide plate carrying in a focus-adjustable manner at least five interchangeable lenses having different magnifications and at least one gear rotatable through drive means including belt and pulleys by a focusing member provided externally of said main frame, said slide plate being movable back and forth in a horizontal direction by an operating lever extending outward from said main frame and holding the selected lens in a predetermined position, said gear being engageable with rotary focusing gears mounted on the mounts of said interchangeable lenses so that said gear meshes with the focusing gear of said interchangeable lens which is selected and held in position.