Surface exposure device for copying apparatus

Claim 1

A device for the optical exposure of an original on copying material which is movably arranged, comprising a housing structure; a support surface horizontally slidably provided in one housing wall and made of transparent material, the original being adapted to be placed on said support surface; an exposure plate provided in the housing structure spaced from the support surface and over which the copying material is moved; exposure means arranged between the support surface and the exposure plate and including a lens assembly arranged in the housing structure to transmit rays of light carrying an image of the original towards the copying material through the exposure plate, said lens assembly being axially shiftable between initial and shifted positions, said lens assembly when in said initial position forming the image of the original on the copying material at a first copying ratio and said lens assembly when in said shifted position forming the image of the original on the copying material at a second copying ratio; a reflector arrangement located between the lens assembly and the support surface and including a plurality of mirrors divided into first and second groups, the two groups being displaceable in the same direction, parallel to the path of travel of said rays of light between said two groups, the first group being movable reciprocally in the direction opposed to the direction of travel of the support surface at the same speed as said support surface, and the second group being movable at half the speed of the first group; guide means arranged in the housing for guiding the two groups of mirrors for movement parallel to the direction of travel of the support surface; first and second control means connected to The first and second groups of mirrors and the support surface and operable, upon movement of the mirrors, to modify a first ray path between one mirror of the first mirror group and at least one mirror of the second mirror group in a relative manner with respect to the modification of a second ray path between at least one mirror of the second mirror group and said lens assembly, whereby an image ray extending between the support surface and said lens assembly, produced on exposure of the original, always follows a path of constant length, regardless of the position of a mirror with respect to the original, said first control means also operable, upon said movement of the mirrors, to move the support surface in the opposite direction to the direction of travel of any of said first and second mirror groups, said second control means further operable to vary the initial position of said second mirror group to a shifted position axially spaced from its initial position in a direction away from any one of the first mirror group and said lens assembly, said variation of said second mirror group to said shifted position being effected when said lens assembly is moved to said shifted position forming the image of the original on the copying material at the second copying ratio.

Claim 2

A device for the optical exposure of an original on copying material which is movably arranged, comprising a housing structure; a support surface horizontally slidably provided in one housing wall and made of transparent material, the original being adapted to be placed on said support surface; an exposure plate provided in the housing structure spaced from the support surface and over which the copying material is moved; exposure means arranged between the support surface and the exposure plate and including a lens assembly arranged in the housing structure to transmit rays of light carrying an image of the original towards the copying material through the exposure plate, said lens assembly being axially shiftable between initial and shifted positions, said lens assembly when in said initial position forming the image of the original on the copying material at a first copying ratio and said lens assembly when in said shifted position forming the image of the original on the copying material at a second copying ratio; a reflector arrangement located between the lens assembly and the support surface and including a plurality of mirrors divided into first and second groups, the two groups being displaceable in the same direction, parallel to the path of travel of said rays of light between said two groups, the first group being movable reciprocally in the direction opposed to the direction of travel of the support surface at the same speed as said support surface, and the second group being movable at half the speed of the first group; guide means arranged in the housing for guiding the two groups of mirrors for movement parallel to the direction of travel of the support surface; first and second control means connected to The first and second groups of mirrors and the support surface and operable, upon movement of the mirrors, to modify a first ray path between one mirror of the first mirror group and at least one mirror of the second mirror group in a relative manner with respect to the modification of a second ray path between at least one mirror of the second mirror group and said lens assembly, whereby an image ray extending between the support surface and said lens assembly, produced on exposure of the original, always follows a path of constant length, regardless of the position of a mirror with respect to the original, said first control means also operable, upon said movement of the mirrors, to move the support surface in the opposite direction to the direction of travel of any of said first and second mirror groups, said second control means further operable to vary the initial position of said second mirror group to a shifted position axially spaced from its initial position in a direction away from any one of the first mirror group and said lens assembly, said variation of said second mirror group to said shifted position being effected when said lens assembly is moved to said shifted position forming the image of the original on the copying material at the second copying ratio.

Claim 8

A device for the optical exposure of an original on copying material which is movably arranged, comprising a reciprocally movable support surface for the original to be placed thereon, exposure means arranged below said support surface and including a first movable mirror means for scanning an image of the original and for transmitting the image of the original to a second movable mirror means which is parallelly arranged with respect to said first mirror means, a lens assembly located in position to transmit the image from said second mirror means to said copying material for focusing the image reflected from said second mirror means and for projecting said image to the moving copying material, said support surface and said first mirror means being adapted to travel parallelly at the same velocity, but in opposite directions with respect to each other and said second mirror means being adapted to travel at half the velocity of said first mirror means in the same direction as said first mirror means, said copying material being moved at a velocity equal to the sum of the velocities of said first mirror means and said support surface, control means for obtaining a magnified reproduction image of the original on said copying material, said control means including a first means for shifting said lens assembly for a distance equal to F(1-m) and a second means for shifting said second mirror means for a distance equal to F(1-m)2 X 1/2 .m precedent to copying operation, wherein F is the focal length of said lens assembly and m is a desired magnification, a third means for modifying respective velocities of said support surface, said first mirror means and said second mirror means to one m-th of the respective velocities of said support surface, said first mirror means and said second mirrors that are attained during real image reproduction.

Claim 9

A device for the optical exposure of an original on copying material which is movably arranged, comprising a reciprocally movable support surface for the original to be placed thereon, exposure means arranged below said support surface and including a first movable mirror means for scanning an image of the original and for transmitting the image of the original to a second movable mirror means which is parallelly arranged with respect to said first mirror means, a lens assembly located in position to transmit the image from said second mirror means to said copying material for focusing the image reflected from said second mirror means and for projecting said image to the moving copying material, said support surface and said first mirror means being adapted to travel parallelly at the same velocity, but in opposite directions with respect to each other and said second mirror means being adapted to travel at half the velocity of said first mirror means in the same direction as said first mirror means, said copying material being moved at a velocity equal to the sum of the velocities of said first mirror means and said support surface, control means for obtaining a magnified reproduction image of the original on said copying material, said control means including a first means for shifting said lens assembly for a distance equal to F(1-m) and a second means for shifting said second mirror means for a distance equal to F(1-m)2 X 1/2 .m precedent to copying operation, wherein F is the focal length of said lens assembly and m is a desired magnification, a third means for modifying respective velocities of said support surface, said first mirror means and said second mirror means to one m-th of the respective velocities of said support surface, said first mirror means and said second mirrors that are attained during real image reproduction.

Claim 10

A device for the optical exposure of an original on copying material which is movably arranged, comprising a reciprocally movable support surface for the original to be placed thereon, exposure means arranged below said support surface and including a first movable mirror means for scanning an image of the original and for transmitting the image of the original to a second movable mirror means which is arranged parallel to said first mirror means, a lens assembly located in position to transmit the image from said second mirror means to said copying material for focusing the image reflected from said second mirror means and for projecting said image to the moving copying material, said support surface and said first mirror means being adapted to travel in parallel at the same velocity, but in opposite directions with respect to each other and said second mirror means being adapted to travel at half the velocity of said first mirror means in the same direction as said first mirror means, said copying material being moved at a velocity equal to the sum of the velocities of said first mirror means and said support surface, control means for obtaining a magnified reproduction image of the original on said copying material, said control means including a first means for shifting said lens assembly for a distance equal to F(1-m) and a second means for shifting said second mirror means for a distance equal to F(1-m)2 X 1/2 .m precedent to copying operation, wherein F is the focal length of said lens assembly and m is a desired magnification, a third means for modifying the velocity of said copying material to the product of the desired magnification and the sum of the velocities of the support surface and the first mirror means with the respective velocities of said support surface, said first mirror means and said second mirror means unchanged.

Claim 11

A device for the optical exposure of an original on copying material which is movably arranged, comprising a reciprocally movable support surface for the original to be placed thereon, exposure means arranged below said support surface and including a first movable mirror means for scanning an image of the original and for transmitting the image of the original to a second movable mirror means which is arranged parallel to said first mirror means, a lens assembly located in position to transmit the image from said second mirror means to said copying material for focusing the image reflected from said second mirror means and for projecting said image to the moving copying material, said support surface and said first mirror means being adapted to travel in parallel at the same velocity, but in opposite directions with respect to each other and said second mirror means being adapted to travel at half the velocity of said first mirror means in the same direction as said first mirror means, said copying material being moved at a velocity equal to the sum of the velocities of said first mirror means and said support surface, control means for obtaining a magnified reproduction image of the original on said copying material, said control means including a first means for shifting said lens assembly for a distance equal to F(1-m) and a second means for shifting said second mirror means for a distance equal to F(1-m)2 X 1/2 .m precedent to copying operation, wherein F is the focal length of said lens assembly and m is a desired magnification, a third means for modifying the velocity of said copying material to the product of the desired magnification and the sum of the velocities of the support surface and the first mirror means with the respective velocities of said support surface, said first mirror means and said second mirror means unchanged.