Photographic copying apparatus

Claim 2

In a photographic apparatus, particularly in a photographic copying apparatus wherein photosensitive material is exposed to printing light passing through a plurality of color filters, a combination comprising a shutter defining a light-admitting opening and including blade means normally assuming a closed position and movable to an open position to thereby permit light to pass through said opening; a plurality of filters each movable independently between first and second positions in which the corresponding filter respectively registers with and is out of registry with said opening; drive means for moving said filters between first and second positions independently of each other; and displacing means for moving said blade means to open position in response to movement of at least one of said filters to second position.

Claim 3

A combination as defined in claim 1, wherein said drive means comprises a discrete electromagnet for each of said filters.

Claim 4

A combination as defined in claim 1, wherein said displacing means comprises a motion receiving portion provided on said blade means and a motion transmitting portion provided on each of said filters, each said motion transmitting portion being arranged to engage and to displace said motion receiving portion in response to movement of the respective filter to second position.

Claim 5

A combination as defined in claim 1, wherein said drive means comprises a discrete electromagnet for each of said filters, said electromagnets being energizabLe to thereby move the respective filters to second positions.

Claim 6

A combination as defined in claim 1, wherein said shutter further comprises biasing means for urging said blade means to closed position.

Claim 7

A combination as defined in claim 1, wherein said filters include a yellow filter and a blue filter.

Claim 8

A combination as defined in claim 1, further comprising a housing for said shutter, said filters, said drive means and said displacing means, said housing having apertures in registry with said opening.

Claim 9

In a photographic apparatus, particularly in a photographic copying apparatus wherein photosensitive material is exposed to printing light passing through a plurality of color filters, a combination comprising a shutter defining a light-admitting opening and including blade means normally assuming a closed position and movable to an open position to thereby permit light to pass through said opening; a plurality of filters each movable between first and second positions in which the corresponding filter respectively registers with and is out of registry with said opening; drive means for moving said filters between said first and second positions; and displacing means for moving said blade means to said open position in response to movement of at least one of said filters to said second position, said displacing means comprising a motion receiving pin provided on said blade means and a motion transmitting portion provided on each of said filters, each said motion transmitting portion being arranged to engage and to displace said motion receiving pin in response to movement of the respective filter to said second position, each of said filters comprising a light-transmitting element and a holder for such light-transmitting element, said holders constituting said motion transmitting portions.

Claim 10

In a photographic apparatus, particularly in a photographic copying apparatus wherein photosensitive material is exposed to printing light passing through a plurality of color filters, a combination comprising a shutter defining a light-admitting opening and including blade means normally assuming a closed position and movable to an open position to thereby permit light to pass through said opening; a plurality of filters each movable between first and second positions in which the corresponding filter respectively registers with and is out of registry with said opening; drive means for moving said filters between said first and second positions; and displacing means for moving said blade means to said open position in response to movement of at least one of said filters to said second position, said displacing means comprising a motion receiving pin provided on said blade means and a motion transmitting portion provided on each of said filters, each said motion transmitting portion being arranged to engage and to displace said motion receiving pin in response to movement of the respective filter to said second position, each of said filters comprising a light-transmitting element and a holder for such light-transmitting element, said holders constituting said motion transmitting portions.

Claim 11

In a photographic apparatus, particularly in a photographic copying apparatus wherein photosensitive material is exposed to printing light passing through a plurality of color filters, a combination comprising a shutter defining a light-admitting opening and including blade means normally assuming a closed position and pivotable to an open position about a predetermined axis to thereby permit light to pass through said opening; a plurality of filters each pivotable about said predetermined axis between first and second positions in which the corresponding filter respectively registers with and is out of registry with said opening; drive means for moving said filters between said first and second positions; and displacing means for moving said blade means to said open position in response to movement of at least one of said filters to said second position.

Claim 12

In a photographic apparatus, particularly in a photographic copying apparatus wherein photosensitive material is exposed to printing light passing through a plurality of color filters, a combination comprising a shutter defining a light-admitting opening and including blade means normally assuming a closed position and pivotable to an open position about a predetermined axis to thereby permit light to pass through said opening; a plurality of filters each pivotable about said predetermined axis between first and second positions in which the corresponding filter respectively registers with and is out of registry with said opening; drive means for moving said filters between said first and second positions; and displacing means for moving said blade means to said open position in response to movement of at least one of said filters to said second position.

Claim 13

In a photographic apparatus, particularly in a photographic copying apparatus wherein photosensitive material is exposed to printing light passing through a plurality of color filters, a combination comprising a shutter defining a light-admitting opening and including blade means normally assuming a closed position and pivotable to an open position about a predetermined axis to thereby permit light to pass through said opening, and biasing means for urging said blade means to said closed position, said biasing means comprising a disk fixed to said blade means and having a peripheral groove and a helical spring having a fixed first end and a second end secured to said disk, said spring having a plurality of convolutions engaging said disk in said groove and being arranged to urge said blade means to said closed position; a plurality of filters each movable between first and second positions in which the corresponding filter respectively registers with and is out of registry with said opening; drive means for moving said filters between said first and second positions; and displacing means for moving said blade means to said open position in response to movement of at least one of said filters to said second position.

Claim 14

In a photographic apparatus, particularly in a photographic copying apparatus wherein photosensitive material is exposed to printing light passing through a plurality of color filters, a combination comprising a shutter defining a light-admitting opening and including blade means normally assuming a closed position and pivotable to an open position about a predetermined axis to thereby permit light to pass through said opening, and biasing means for urging said blade means to said closed position, said biasing means comprising a disk fixed to said blade means and having a peripheral groove and a helical spring having a fixed first end and a second end secured to said disk, said spring having a plurality of convolutions engaging said disk in said groove and being arranged to urge said blade means to said closed position; a plurality of filters each movable between first and second positions in which the corresponding filter respectively registers with and is out of registry with said opening; drive means for moving said filters between said first and second positions; and displacing means for moving said blade means to said open position in response to movement of at least one of said filters to said second position.