Device for erasing unnecessary images for use in reader-printers

Claim 3

A device as claimed in claim 1, wherein said control means controls said illuminating means so as to turn off said illuminating means when negative film is used and to turn on said illuminating means when positive film is used.

Claim 4

A device as claimed in claim 1, further comprising means for specifying the area of the blocking region by said first flap means, wherein said control means controls said first flap means so as to vary the blocking region in accordance with the area of the blocking region specified by said specifying means.

Claim 5

A device as claimed in claim 1, wherein said first flap means includes a fixed flap and a movable flap which are arranged along the longitudinal direction of the slit and are partially overlapping each other.

Claim 6

A reader-printer in which an image of a microfilm is selectively projected to a screen entirely or to a photosensitive medium through a slit stepwisely and the image projected to the photosensitive medium is formed into a positive copy irrespective of negative or positive film, said reader-printer comprising: a lens means for projecting the microfilm image, first mirror means for guiding the entire image from said lens means to the screen, second mirror means for guiding the image from said lens means to the photosensitive medium through the slit by a scanning movement, first flap means disposed in the vicinity of at least one longitudinal end of the slit and movable into or out of an optical path of said second mirror means for partially blocking the image when positioned in the optical path, said first flap means forming a blocking region which has variable area when positioned in the optical path and having a reflecting surface on one side thereof opposed to the photosensitive medium, illuminating means for projecting light onto the first and second flap means, means for specifying the area of the blocking region provided by said first flap means, means for identifying the film as to whether said film is negative or positive, and means for controlling the movement of the first and second flap means and the operation of the illuminating means in accordance with said area specifying means and film identifying means for erasing the unnecessary image of the microfilm from the copy.

Claim 7

A reader-printer in which an image of a microfilm is selectively projected to a screen entirely or to a photosensitive medium through a slit stepwisely and the image projected to the photosensitive medium is formed into a positive copy irrespective of negative or positive film, said reader-printer comprising: a lens means for projecting the microfilm image, first mirror means for guiding the entire image from said lens means to the screen, second mirror means for guiding the image from said lens means to the photosensitive medium through the slit by a scanning movement, first flap means disposed in the vicinity of at least one longitudinal end of the slit and movable into or out of an optical path of said second mirror means for partially blocking the image when positioned in the optical path, said first flap means forming a blocking region which has variable area when positioned in the optical path and having a reflecting surface on one side thereof opposed to the photosensitive medium, illuminating means for projecting light onto the first and second flap means, means for specifying the area of the blocking region provided by said first flap means, means for identifying the film as to whether said film is negative or positive, and means for controlling the movement of the first and second flap means and the operation of the illuminating means in accordance with said area specifying means and film identifying means for erasing the unnecessary image of the microfilm from the copy.

Claim 8

A reader-printer as claimed in claim 5, wherein said control means controls said illuminating means so as to turn off when negative film is used and to turn on when positive film is used.

Claim 9

A reader-printer as claimed in claim 5, wherein said control means controls said first flap means so as to vary the area of the blocking region in accordance with the specified area of the blocking region.

Claim 10

A reader-printer as claimed in claim 5, wherein said first flap means includes a fixed flap and a movable flap which are arranged along the longitudinal direction of the slit and are partially overlapping each other.

Claim 11

A reader-printer as claimed in claim 5, wherein said area specifying means includes an input member for inputing a signal for specifying the area of the blocking region and an indicator for indicating an expected partial copying area.

Claim 12

A reader-printer as claimed in claim 9, wherein said indicator is disposed adjacent to the screen.