Apparatus for reading and electrophotographic reproduction of microphotographs

Claim 2

Apparatus for reading and electrophotographic reproduction of microphotographs comprising: a roll of copy paper; an exposure station having an exposure plane for receiving a light image of a microphotograph to be reproduced; a developing station including a member for applying toner to said copy paper; cutting means for severing said copy paper; drive means for moving said copy paper from said roll through said exposure station and said developing station; charging means movable back and forth along said exposure plane to charge said copy paper at said exposure station; an optical system for transmitting a light image of a microphotograph to said exposure plane or said screen, said optical system including a mirror pivotal between a reading position wherE said light image is transmitted to said screen and a reproduction position where said light image is transmitted to said exposure plane; and control means for operating said drive means, said charging means and said mirror to move said copy paper to said exposure station prior to movment of said charging means and to move said mirror from said reading position to said reproduction position, said control means including means for changing the polarity of said charging means as said charging means reciprocates to charge the copy paper with one polarity while the charging means moves in one direction and with the opposite polarity when the charging means changes direction.

Claim 3

Apparatus for reading and electrophotographic reproduction of microphotographs as recited in claim 1 wherein said charging means includes a high voltage source having positive and negative terminals and corona charging elecrodes, and said means for changing the polarity of said charging means includes switch means selectively connecting said corona charging electrodes to said positive terminal of said negative terminal of said high voltage source.

Claim 4

Apparatus for reading and electrophotographic reproduction of microphotographs as recited in claim 2 wherein said means for changing the polarity of said charging means includes a switch actuated by movement of said charging means along said exposure plane to control the position of said switch.

Claim 5

Apparatus for reading and elecrophotographic reproduction of microphotographs as recited in claim 1 wherein said charging means includes a plurality of corona charging electrodes movable along said exposure plane and a high voltage source supplying opposite polarity voltages to said corona charging electrodes.

Claim 6

Apparatus for reading and electrophotographic reproduction of microphotographs comprising: a roll of copy paper; an exposure station having an exposure plane for receiving a light image of a microphotograph to be reproduced; a developing station including a member for applying toner to said copy paper; cutting means for severing said copy paper; drive means for moving said copy paper from said roll through said exposure station and said developing station; charging means movable back and forth along said exposure plane to charge said copy paper at said exposure station; a screen for displaying microphotographs for reading; an optical system for transmitting a light image of a microphotograph to said exposure plane or said screen, said optical system including a mirror pivotal between a reading position where said light image is transmitted to said screen and a reproduction position where said light image is transmitted to said exposure plane; and control means for operating said drive means, said charging means and said mirror to move said copy paper to said exposure station prior to movement of said charging means, and to move said mirror from said reading position to said reproduction position; said developing station including means responsive to movement of said mirror from said reading position to said reproduction position to move said toner applying member from a retracted position away from the path of said copy paper through said exposure station to a developing position for contacting said copy paper to apply toner thereto.

Claim 7

Apparatus for reading and electrophotographic reproduction of microphotographs comprising: a roll of copy paper; an exposure station having an exposure plane for receiving a light image of a microphotograph to be reproduced; a developing station including a member for applying toner to said copy paper; cutting means for severing said copy paper; drive means for moving said copy paper from said roll through said exposure station and said developing station; charging means movable back and forth along said exposure plane to charge said copy paper at said exposure station; a screen for displaying microphotographs for reading; an optical system for transmitting a light image of a microphotograph to said exposure plane or said screen, said optical system including a mirror pivotal between a reading position where said light image is transmitted to said screen and a reproduction position where said light image is transmitted to said exposure plane; and control means for operating said drive means, said charging means and said mirror to move said copy paper to said exposure station prior to movement of said charging means, and to move said mirror from said reading position to said reproduction position; said developing station including means responsive to movement of said mirror from said reading position to said reproduction position to move said toner applying member from a retracted position away from the path of said copy paper through said exposure station to a developing position for contacting said copy paper to apply toner thereto.

Claim 8

Apparatus for reading and electrophotographic reproductions of microphotographs as recited in claim 5 wherein said toner applying member is pivotally mounted and said mirror has a cam member extending therefrom for movement with said mirror to abut said toner applying member and move said toner applying member to said developing position.

Claim 9

Apparatus for reading and electrophotographic reproductions of microphotographs as recited in claim 6 wherein said developing station includes support means mounting said toner applying member and a pair of adjustable stops for engaging said support means to precisely position said toner applying member in said reTracted position and in said developing position.

Claim 10

Apparatus for reading and electrophotographic reproduction of microphotographs comprising: a roll of copy paper; an exposure station having an exposure plane for receiving a light image of a microphotograph to be reproduced; a developing station including a member for applying toner to said copy paper; cutting means for severing said copy paper; drive means for moving said copy paper from said roll through said exposure station and said developing station; charging means movable back and forth along said exposure plane to charge said copy paper at said exposure station wherein said charging means includes a high voltage source having positive and negative terminals and corona-charging electrodes; an optical system for transmitting a light image of a microphotograph to said exposure plane or said screen, said optical system including a mirror pivotal between a reading position where said light image is transmitted to said screen and a reproduction position where said light image is transmitted to said exposure plane; and control means for operating said drive means, said charging means and said mirror to move said copy paper to said exposure station prior to movement of said charging means and to move said mirror from said reading position to said reproduction position, said control means including means for changing the polarity of said charging means during movement along said exposure plane to permit positive and negative charging of said copy paper, wherein said means for changing the polarity of said charging means includes switch means selectively connecting said corona-charging electrodes to said positive terminal or said negative terminal of said high voltage source and wherein said means for changing the polarity of said charging means further includes a switch actuated by movement of said charging means along said exposure plane to control the position of said switch.

Claim 11

Apparatus for reading and electrophotographic reproduction of microphotographs comprising: a roll of copy paper; an exposure station having an exposure plane for receiving a light image of a microphotograph to be reproduced; a developing station including a member for applying toner to said copy paper; cutting means for severing said copy paper; drive means for moving said copy paper from said roll through said exposure station and said developing station; charging means movable back and forth along said exposure plane to charge said copy paper at said exposure station wherein said charging means includes a high voltage source having positive and negative terminals and corona-charging electrodes; an optical system for transmitting a light image of a microphotograph to said exposure plane or said screen, said optical system including a mirror pivotal between a reading position where said light image is transmitted to said screen and a reproduction position where said light image is transmitted to said exposure plane; and control means for operating said drive means, said charging means and said mirror to move said copy paper to said exposure station prior to movement of said charging means and to move said mirror from said reading position to said reproduction position, said control means including means for changing the polarity of said charging means during movement along said exposure plane to permit positive and negative charging of said copy paper, wherein said means for changing the polarity of said charging means includes switch means selectively connecting said corona-charging electrodes to said positive terminal or said negative terminal of said high voltage source and wherein said means for changing the polarity of said charging means further includes a switch actuated by movement of said charging means along said exposure plane to control the position of said switch.

Claim 12

Apparatus for reading and electrophotographic reproduction of microphotographs comprising: a roll of copy paper; an exposure station having an exposure plane for receiving a light image of a microphotograph to be reproduced; a developing station including a member for applying toner to said copy paper; cutting means for severing said copy paper; drive means for moving said copy paper from said roll through said exposure station and said developing station; charging means movable back and forth along said exposure plane to charge said copy paper at said exposure station wherein said charging means includes a plurality of corona-charging electrodes movable along said exposure plane and a high voltage source supply opposite polarity voltages to said corona-charging electrodes; an optical system for transmitting a light image of a microphotograph to said exposure plane or said screen, said optical system including a mirror pivotal between a reading position where said light image is transmitted to said screen and a reproduction position where said light image is transmitted to said exposure plane; and control means for operating said drive means, said charging means and said mirror to move said copy paper to said exposure station prior to movement to said charging means and to move said mirror from said reading position to said reproduction position, said control means including means for changing the polarity of said charging means during movement along said exposure plane or permit positive and negative charging of said copy paper.

Claim 13

Apparatus for reading and electrophotographic reproduction of microphotographs comprising: a roll of copy paper; an exposure station having an exposure plane for receiving a light image of a microphotograph to be reproduced; a developing station including a member for applying toner to said copy paper; cutting means for severing said copy paper; drive means for moving said copy paper from said roll through said exposure station and said developing station; charging means movable back and forth along said exposure plane to charge said copy paper at said exposure station wherein said charging means includes a plurality of corona-charging electrodes movable along said exposure plane and a high voltage source supply opposite polarity voltages to said corona-charging electrodes; an optical system for transmitting a light image of a microphotograph to said exposure plane or said screen, said optical system including a mirror pivotal between a reading position where said light image is transmitted to said screen and a reproduction position where said light image is transmitted to said exposure plane; and control means for operating said drive means, said charging means and said mirror to move said copy paper to said exposure station prior to movement to said charging means and to move said mirror from said reading position to said reproduction position, said control means including means for changing the polarity of said charging means during movement along said exposure plane or permit positive and negative charging of said copy paper.