Electrophotographic duplicator

Claim 2

An electrophotographic duplicator of the electrofax type, comprising: a transparent plate for supporting a manuscript thereon to be copied in a static position; an exposing device located beneath said transparent plate and being movable in a direction parallel to said plate; means for moving said exposing device in a forward and reverse direction at a constant first linear speed from one end of said plate to the other; an illuminating element on said exposing device for illuminating the manuscript through said plate; one side of said exposing device which faces said plate having a first slit therein; movable convEyor means located adjacent an opposite side of said exposing device for transferring a light sensitive sheet having substantially an equal length to that of said plate in a plane parallel to said plate in the same forward and reverse direction as said exposing device and at a second constant linear speed twice that of said first speed; said opposite side of said exposing device having a second slit therein; and an optical system located between said first slit and second slit within said exposing device including a projecting lens system the optical axis of which is directed parallel to the direction of movement of said exposing device, a mirror facing said first slit and being inclined to said plate and said sheet at an angle of 45* for reflecting light passing through said first slit vertically from the manuscript to said projecting lens system, and roof reflecting means facing said second slit having two reflecting surfaces crossing each other at right angles, the crossing edge of said reflecting means being inclined to said plate and said sheet at an angle of 45* for reflecting light along said optical axis of and from said projecting lens system to said second slit.

Claim 3

An electrophotographic duplicator of the electrofax type, comprising: a transparent plate for supporting a manuscript thereon to be copied in a static position; an exposing device located beneath said transparent plate and being movable in a direction parallel to said plate; means for moving said exposing device in a forward and reverse direction at a constant first linear speed from one end of said plate to the other; an illuminating element on said exposing device for illuminating the manuscript through said plate; one side of said exposing device which faces said plate having a first slit therein; movable conveyor means located adjacent an opposite side of said exposing device for transferring a light sensitive sheet having substantially an equal length to that of said plate in a plane parallel to said plate in the same forward and reverse direction as said exposing device and at a second constant linear speed twice that of said first speed; said opposite side of said exposing device having a second slit therein; and an optical system located between said first slit and second slit within said exposing device including a mirror-lens system comprising a lens system the optical axis of which is perpendicular to said plate and said sheet, and a roof mirror system having two reflecting surfaces crossing each other at right angles and the crossing edge of which faces said second slit to reflect light passing through said lens system to said second slit and a flat mirror facing said first slit parallel to said plate and said sheet for reflecting light passed through said first slit from the manuscript to said mirror-lens system.

Claim 4

An electrophotographic duplicator of the electrofax type, comprising: a transparent plate for supporting a manuscript thereon to be copied in a static position; an exposing device located beneath said transparent plate and being movable in a direction parallel to said plate; means for moving said exposing device in a forward and reverse direction at a constant first linear speed from one end of said plate to the other; an illuminating element on said exposing device for illuminating the manuscript through said plate; one side of said exposing device which faces said plate having a first slit therein; movable conveyor means located adjacent an opposite side of said exposing device for transferring a light sensitive sheet having substantially an equal length to that of said plate in a plane parallel to said plate in the same forward and reverse direction as said exposing device and at a second constant linear speed twice that of said first speed; said opposite side of said exposing device having a second slit therein; and an optical system located between said first slit and second slit within said exposing device including a mirror-lens system comprising a lens system the optical axis of which is perpendicular to said plate and said sheet, and a roof mirror system having two reflecting surfaces crossing each other at right angles and the crossing edge of which faces said second slit to reflect light passing through said lens system to said second slit and a flat mirror facing said first slit parallel to said plate and said sheet for reflecting light passed through said first slit from the manuscript to said mirror-lens system.

Claim 5

An electrophotographic duplicator of the electrofax type, comprising: a transparent plate for supporting manuscript thereon to be copied in a static position; an exposing device located beneath said transparent plate and being movable parallel to said plate; means for moving said exposing device in a forward and reverse direction at a constant first linear speed from one end of said plate to the other; an illuminating element on said exposing device for illuminating the manuscript through said plate; one side of said exposing device which faces said plate having a first slit therein; movable conveyor means located adjacent an opposite side of said exposing device for transferring a light sensitive sheet having substantially an equal length to that of said plate in a plane parallel to said plate in the same forward and reverse direction as said exposing device and at a second constant linear speed twice that of said first speed; said opposite side of said exposing device having a second slit therein; and an optical system located between said first slit and said seCond slit within said exposing device including a mirror-lens system comprising a lens system the optical axis of which is parallel to said direction of movement of said exposing device, and a roof mirror system having two reflecting surfaces each of which crosses said direction of movement of said exposing device at an angle of 45 degrees, and the crossing edge of said both reflecting surfaces being directed perpendicularly to said direction of movement of said exposing device, a first flat mirror facing said first slit and a second flat mirror perpendicular to said direction of movement for serially reflecting light passing through said first slit from the manuscript to said mirror-lens system, and a third flat mirror facing said second slit for reflecting said light reflected in said mirror-lens system to said second slit.

Claim 6

An electrophotographic duplicator of the electrofax type, comprising: a transparent plate for supporting manuscript thereon to be copied in a static position; an exposing device located beneath said transparent plate and being movable parallel to said plate; means for moving said exposing device in a forward and reverse direction at a constant first linear speed from one end of said plate to the other; an illuminating element on said exposing device for illuminating the manuscript through said plate; one side of said exposing device which faces said plate having a first slit therein; movable conveyor means located adjacent an opposite side of said exposing device for transferring a light sensitive sheet having substantially an equal length to that of said plate in a plane parallel to said plate in the same forward and reverse direction as said exposing device and at a second constant linear speed twice that of said first speed; said opposite side of said exposing device having a second slit therein; and an optical system located between said first slit and said seCond slit within said exposing device including a mirror-lens system comprising a lens system the optical axis of which is parallel to said direction of movement of said exposing device, and a roof mirror system having two reflecting surfaces each of which crosses said direction of movement of said exposing device at an angle of 45 degrees, and the crossing edge of said both reflecting surfaces being directed perpendicularly to said direction of movement of said exposing device, a first flat mirror facing said first slit and a second flat mirror perpendicular to said direction of movement for serially reflecting light passing through said first slit from the manuscript to said mirror-lens system, and a third flat mirror facing said second slit for reflecting said light reflected in said mirror-lens system to said second slit.

Claim 7

An electrophotographic transfer type duplicator comprising: a transparent plate for supporting a manuscript thereon to be copied in a static position; an exposing device located parallel to and beneath said transparent plate and being movable in a direction parallel to said plate; means for moving said exposing device in a forward and reverse direction at a first linear speed from one end of said plate to the other; an illuminating device on said exposing device for illuminating the manuscript through said plate; one side of said exposing device which faces said plate having a first slit therein; movable conveyor means located on the opposite side to said exposing device and comprising an endless belt of a light sensitive sheet and a pair of rollers spaced apart a distance substantially equal to the length of said plate, wherein the side of said belt facing said exposing device which travels around said rollers is driven parallel to the forward direction of said exposing device and at a second speed twice that of the first speed, and one roller in the forward direction of said pair of rollers is a first grounded conductive roller; said opposite side of said exposing device having a second slit therein; a projection optical system located between said first slit and said second slit within said exposing device including a mirror and lens system forming a positive inverted image from the manuscript onto said light sensitive sheet; a charging device integrally formed on said exposing device and located rearwardly of said second slit in the forward movable direction of said exposing device; a receptacle for sheets of transfer paper disposed forwardly of said movable conveyor means; means for feeding the transfer sheets in the rearward direction at a constant linear speed twice that of said first speed; and a transfer device including a second grounded conductive roller in contact with said first grounded conductive roller of said movable conveyor means for urging said fed transfer sheets against said light sensitive sheet.

Claim 8

An electrophotographic transfer type duplicator comprising: a transparent plate for supporting a manuscript thereon to be copied in a static position; an exposing device located parallel to and beneath said transparent plate and being movable in a direction parallel to said plate; means for moving said exposing device in a forward and reverse direction at a first linear speed from one end of said plate to the other; an illuminating device on said exposing device for illuminating the manuscript through said plate; one side of said exposing device which faces said plate having a first slit therein; movable conveyor means located on the opposite side to said exposing device and comprising an endless belt of a light sensitive sheet and a pair of rollers spaced apart a distance substantially equal to the length of said plate, wherein the side of said belt facing said exposing device which travels around said rollers is driven parallel to the forward direction of said exposing device and at a second speed twice that of the first speed, and one roller in the forward direction of said pair of rollers is a first grounded conductive roller; said opposite side of said exposing device having a second slit therein; a projection optical system located between said first slit and said second slit within said exposing device including a mirror and lens system forming a positive inverted image from the manuscript onto said light sensitive sheet; a charging device integrally formed on said exposing device and located rearwardly of said second slit in the forward movable direction of said exposing device; a receptacle for sheets of transfer paper disposed forwardly of said movable conveyor means; means for feeding the transfer sheets in the rearward direction at a constant linear speed twice that of said first speed; and a transfer device including a second grounded conductive roller in contact with said first grounded conductive roller of said movable conveyor means for urging said fed transfer sheets against said light sensitive sheet.

Claim 9

The duplicator according to claim 4 further comprising a developer disposed beneath said endless belt, and further means for feeding the transfer sheets from between said transfer device and said belt into said developer at a constant linear speed twice that of said first speed.