US 4,035,074 AGranted

Step and repeat camera having an improved film processor

AssigneeMinnesota Mining and Manufacturing Company

InventorLawrence A. Flor

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Abstract

A step and repeat camera is disclosed which includes a module for supporting a supply of film material, for metering a length of film material from the support and cutting the film to a predetermined length, a second module for supporting the cut sheet of film with the light sensitive coated surface positioned downward and moving the film along X and Y coordinates to position successive areas of the film over an image projecting lens. The support moves the film from a first film receiving conveyor to a titling area where a title is contact exposed onto the film, through the imaging section along the coordinates, and to the discharge conveyor. The third module includes apparatus for conveying the film over a DC corona bar which causes the film to adhere to a hot processing drum and to be carried thereby under a heated shoe past an AC corona bar to discharge the film, permitting the same to drop from the surface of the drum across its initial infeed path into a cooling chute.

A step and repeat camera for placing images of documents onto microfiche comprising:

a housing,
fixed support means for supporting a supply of unexposed light-sensitive heat-developable film,
means for advancing said film from said supply and placing the same in a reference position,
support means for contacting said film and placing the same in a fixed horizontal focal plane,
drive means for moving said support means and said film in mutually perpendicular X and Y directions incrementally to place successive areas of said film in a predetermined location,
lens and shutter means for imparting images from a support onto said film at said predetermined location, and
processing means for processing the exposed sheet of film upon exposure of a predetermined number of said areas, said processing device comprises
a conveyor for receiving an exposed film, said conveyor or moving said film along a predetermined path,
a drum rotatably mounted about an axis transverse to the direction of movement of said conveyor, said axis supporting the periphery of said drum generally tangential to the path of movement of said conveyor,
a shoe disposed about and spaced from the periphery of said drum to allow a film to move therebetween,
heating means for heating at least one of said drum and shoe sufficiently to afford the development of a film as said film moves with said drum past said shoe,
corona charging means disposed adjacent said drum and said shoe for placing a charge on a section of film moved from said conveyor into contact with said drum and for removing the charge from a film after the same has passed about the surface of said drum to permit said sheet of material to fall edgewise from said surface of said drum, and
a vertically positioned chute disposed in a position generally tangential to a side of said drum and positioned below and normal to the path of said conveyor and at the end of said conveyor nearest said drum for receiving and discharging a film separated from said drum.

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Abstract

Claims3