Film processor

Claim 2

A film processor comprising: a replenishment pump for supplying developer fluid to said film processor, means for moving exposed film through said film processor, a light sensitive device for measuring the light density of the developed film, means for intermittently producing an electrical signal having a time duration substantially proportional to the measured density of said film, means for energizing said replenishment pump at times determined by said electrical signal, and a switch means actuated by the movement of film through said film processor, said switch means being connected to and operating said means for intermittently producing an electrical signal for each increment of film length which is processed.

Claim 3

The film processor recited in claim 1 further comprising: program selector means for energizing said replenishment pump for differing time durations selectable in accordance with the type of film being processed.

Claim 4

The film processor recited in claim 1 further comprising: means for accumulating the intermittent electrical signals having time duration proportional to the measured density of said film, the accumulated signals representing the accumulated density of film passing through said processor, said means for energizing said replenishment pump being actuated when the accumulated signal reaches a certain level.

Claim 5

The film processor recited in claim 3 wherein said means for accumulating comprises a servo motor, the intermittent electrical signals having time durations proportional to the measured density being applied to said servo motor so that the rotation thereof accumulates the measured density of said film, and a reed switch actuated at the completion of each revolution of said servo motor, said reed switch being connected to said means for energizing said replenishment pump.

Claim 6

A film processor comprising: a replenishment pump for supplying developer fluid to said film processor, means for moving exposed film through said film processor, a light sensitive device for measuring the light density of the developed film, means for intermittently producing an electrical signal having a time duration substantially proportional to the measured density of said film, said means for intermittently producing an electrical signal including a time delay circuit including a charging capacitor and a plurality of resistors, a plurality of relays for selectively connecting said resistors in said delay time circuit, and means responsive to said light sensitive device for selectively energizing said relays, and means for energizing said replenishment pump at times determined by said electrical signal.

Claim 7

A film processor comprising: a replenishment pump for supplying developer fluid to said film processor, means for moving exposed film through said film processor, a light sensitive device for measuring the light density of the developed film, means for intermittently producing an electrical signal having a time duration substantially proportional to the measured density of said film, said means for intermittently producing an electrical signal including a time delay circuit including a charging capacitor and a plurality of resistors, a plurality of relays for selectively connecting said resistors in said delay time circuit, and means responsive to said light sensitive device for selectively energizing said relays, and means for energizing said replenishment pump at times determined by said electrical signal.

Claim 8

The film processor recited in claim 1 wherein said means responsive to the output of said light sensitive device comprises: a meter movement carrying a flag, the output of said light sensitive device being applied to move said meter movement, a plurality of photo devices respectively connected to said plurality of relays, and a plurality of lamps, each positioned adjacent one of said photo devices, said flag being successively interposed between a lamp and the associated photo device as it moves, said photo devices being connected to and selectively actuating said relays.

Claim 9

A film processor comprising: a replenishment pump for supplying developer fluid to said film processor, means for moving exposed film through said film processor, a light sensitive device for measuring the light densiTy of the developed film, means for intermittently producing an electrical signal having a time duration substantially proportional to the measured density of said film, means for energizing said replenishment pump at times determined by said electrical signal, and means responsive to the movement of film through said film processor, said means being connected to and operating said means for intermittently producing an electrical signal for each increment of film length which is processed.

Claim 10

A film processor comprising: a replenishment pump for supplying developer fluid to said film processor, means for moving exposed film through said film processor, a light sensitive device for measuring the light densiTy of the developed film, means for intermittently producing an electrical signal having a time duration substantially proportional to the measured density of said film, means for energizing said replenishment pump at times determined by said electrical signal, and means responsive to the movement of film through said film processor, said means being connected to and operating said means for intermittently producing an electrical signal for each increment of film length which is processed.