US 5,181,066 A · Paper device and method for photographic printer

Abstract

A paper transporting device for a photographic printer. A pulse motor starts rotating during a magazine setting operation. The rotation of the pulse motor is transmitted to a pair of feed rollers through a pin-clutch mechanism and a paper feed gear train. Immediately before a paper magazine is completely attached to the photographic printer, the feed rollers nip the leading end of photographic paper and pull the photographic paper out of the paper magazine. When changing the paper magazine, a solenoid is turned on to change over the pin-clutch mechanism from the paper feed gear train to a paper rewind gear train. Thereafter, the pulse motor is rotated in reverse, so as to rotate a winding shaft of the paper magazine through the pin-clutch mechanism and the paper rewind gear train. An unexposed portion of the photographic paper remaining in the photographic printer is thus wound back into the paper magazine.

Claims14

Dependent claims

A paper transporting device for a photographic printer, said device comprising:

a pair of feed rollers for nipping a leading end of photographic paper and pulling said photographic paper out of a paper magazine attached to said photographic printer, so as to feed said photographic paper to an exposure station, said feed rollers being disposed near said paper magazine;
a paper feed gear train operatively coupled to said feed rollers;
a paper rewind gear train operatively coupled to a winding shaft of said paper magazine, so as to rewind said photographic paper onto said winding shaft;
a motor rotating in a first direction during a paper feeding operation, and rotating in a second direction, which is reverse to said first direction, during a paper rewinding operation;
a first gear in meshing engagement with said paper feed gear train;
a second gear in meshing engagement with said paper rewind gear train;
a pin-clutch mechanism coupled to said motor so as to transmit the rotation of said motor alternatively to one of said first and second gears;
and
control means for controlling said motor and said pin-clutch mechanism.

6 more elements

A method of transporting a photographic paper for a photographic printer, comprising the steps of:

A. bringing a pin-clutch mechanism into engagement with a first gear which meshes with a paper feed gear train, so as to couple a motor to a pair of feed rollers through said paper feed gear train;
B. rotating said motor in a first direction so as to rotate said feed rollers in a paper in a paper feed direction;
C. nipping photographic paper between said feed rollers rotating in the paper feed direction so as to pull said photographic paper out of a paper magazine and feed said photographic paper to an exposure station;
D. cutting said paper at a portion upstream of an exposed portion of said photographic paper when said paper magazine is to be changed;
E. releasing said pin-clutch mechanism from said first gear and bringing said pin-clutch mechanism into engagement with a second gear which meshes with a paper rewind gear train, so as to couple said motor to a winding shaft of said paper magazine through said paper rewind gear train;
and thereafter
F. rotating said motor in a second direction to said first direction, so as to rotate said winding shaft and rewind said photographic paper onto said winding shaft.

4 more elements

Dependencies are inferred from the claim text.

Paper device and method for photographic printer

Life of this patent

Paper device and method for photographic printer

Life of this patent

Abstract

Claims14