Optical system for use in microfilm reading and printing apparatus

Claim 2

An optical system for use in a microfilm reading and printing apparatus which comprises a lens assembly for selectively projecting, on an enlarged scale, image light of information on a microfilm illuminated by a light source onto an exposure station of a printing section and onto an observation screen of the microfilm reading and printing apparatus, a first reflecting mirror, a second reflecting mirror, said first reflecting mirror being displaceable between a first position thereof for projecting said image light through said lens assembly onto said exposure station and a second position thereof for projecting said image light onto said second reflecting mirror, said second reflecting mirror being displaceable between a first position thereof for projecting said image light from said first mirror at said second position onto said observation screen and a second position thereof spaced away from a path of said image light between said first reflecting mirror at said first position and said exposure station, said first and second reflecting mirrors being disposed for intercepting outside light entering from said observation screen when the former is at said first position and the latter is at said second position, and driving means for positioning said first reflecting mirror to said second position and said second reflecting mirror to said first position during reading, and also for positioning said first reflecting mirror to said first position and said second reflecting mirror to said second position during printing.

Claim 3

An optical system as claimed in claim 1, wherein said driving means includes members for associating said first reflecting mirror with said second reflecting mirror, with said first and second reflecting mirrors being driven for associated movements therebetween by a common driving source.

Claim 4

An optical system as claimed in claim 2, wherein said associating members further include a first and second levers which are each secured, at its one end, on a first shaft rotatably supported by a frame of a housing of said apparatus, with a first base plate for said first reflecting mirror being rotatably supported on said first shaft in a direction parallel to the latter for enabling said first reflecting mirror to rotate in one direction until said first base plate contacts the other end of said second lever forming a first stopper, a third lever pivotally supported, at a position adjacent to one end thereof in a direction normal to said first lever by a second shaft which is secured to the frame and extends in a direction parallel to said first shaft, said third lever having, at said one end, a tapered edge engaging a first pin member secured to the other end of said first lever, with guide means being formed at the other end of said third lever, a cam plate secured to an end of a driving shaft which extends in a direction parallel to said second shaft through said frame up to a position adjacent to said guide means of said third lever and which is connected to said common driving source, a third shaft secured to the frame and extending in a direction parallel to said first shaft, with a second base plate for said second reflecting mirror which is rotatably supported by said third shaft being urged, to rotate in a direction counter to the direction of the rotation of said first reflecting mirror until said second base plate of said second reflecting mirror contacts a third stopper member fixedly disposed therebehind, and a second pin member secured at one end thereof to one side of said second base plate adjacent to corresponding end of said third lever and contacting cam surface of said cam plate through said guide means.

Claim 5

An optical system as claimed in claim 3, wherein said guide means is an elongated opening formed at said the other end of said third lever.

Claim 6

An optical system as claimed in claim 3, wherein said second lever is further provided, at said the other end thereof contacting said first base plate of said first reflecting mirror, with a first adjusting screw for adjusting angle of said first reflecting mirror to bring the light image projected onto the observation screen to a correct position, with a second stopper plate being secured at one end thereof to the frame at a position adjacent to said second lever, the other end of said second stopper plate which extends over said first base plate being provided with a second adjusting screw for adjusting angle of said first reflecting mirror to direct the image light reflected by said first reflecting mirror exactly onto the exposure station during projection of the image light toward the exposure station.

Claim 7

An optical system for use in a microfilm reading and printing apparatus which comprises a lens assembly for selectively projecting, on an enlarged scale, image light of information on a microfilm illuminated by a light source onto an exposure station of a printing section and onto an observation screen of the microfilm reading and printing apparatus, a first reflecting member, a second reflecting member, said first reflecting member being displaceable between a first position thereof for projecting said image light through the lens assembly onto said exposure station and a second position thereof for projecting said image light on said second reflecting member, said first reflecting member normally being disposed at said first position by its weight, said second reflecting member being displaceable between a first position thereof for projecting said image light from said first reflecting member at said second position onto said observation screen and a second position thereof spaced away from a path of said image light between said first reflecting member at said first position and said exposure station, and driving means for driving said first and second reflecting member and including first and second lever members provided on said first and second reflecting members respectively, an associating member engaged with said first and second lever members, an urging member connected with said second lever member and urging said second reflecting member to said first position and urging said first lever member through said associating member to maintain said first reflecting member at said second position during reading, a driving source for driving said second lever member against said urging member to bring said second reflecting member to said second position with said associating member following the movement of said second lever member to move said first lever member by the weight of said first reflecting member to bring said first reflecting member to said first position, whereby said first and second reflecting members are positioned suitable for printing.

Claim 8

An optical system for use in a microfilm reading and printing apparatus which comprises a lens assembly for selectively projecting, on an enlarged scale, image light of information on a microfilm illuminated by a light source onto an exposure station of a printing section and onto an observation screen of the microfilm reading and printing apparatus, a first reflecting member, a second reflecting member, said first reflecting member being displaceable between a first position thereof for projecting said image light through the lens assembly onto said exposure station and a second position thereof for projecting said image light on said second reflecting member, said first reflecting member normally being disposed at said first position by its weight, said second reflecting member being displaceable between a first position thereof for projecting said image light from said first reflecting member at said second position onto said observation screen and a second position thereof spaced away from a path of said image light between said first reflecting member at said first position and said exposure station, and driving means for driving said first and second reflecting member and including first and second lever members provided on said first and second reflecting members respectively, an associating member engaged with said first and second lever members, an urging member connected with said second lever member and urging said second reflecting member to said first position and urging said first lever member through said associating member to maintain said first reflecting member at said second position during reading, a driving source for driving said second lever member against said urging member to bring said second reflecting member to said second position with said associating member following the movement of said second lever member to move said first lever member by the weight of said first reflecting member to bring said first reflecting member to said first position, whereby said first and second reflecting members are positioned suitable for printing.