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US 5,491,526 AGranted
Instant camera and manufacturing method of the same
AssigneeFuji Photo Film Co., Ltd.
InventorMitsuru Shimizu
Life of this patent
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AssigneeFuji Photo Film Co., Ltd.
InventorMitsuru Shimizu
Estimating the term…
An instant camera is used with a film unit, in which a solution pod contains processing solution. The camera has first and second rotatable spreading rollers, which apply pressure to the film unit. When rotated the spreading rollers squeeze the pod, exit the film unit, and spread the solution. At least the first spreading roller is shaped to have convexity at a center like a barrel which meets 0.5.delta..ltoreq.D.sub.1 -D.sub.2 .ltoreq.4 .delta. where D.sub.1 is a diameter of a center of the first spreading roller, D.sub.2 is a diameter of ends of the first spreading roller, and .delta. is an amount at which the roller center is flexed relative to the roller ends and which meets .delta.=WL.sup.3 /(3.pi./D.sub.2.sup.4 .multidot.E) where E is Young's modulus of material of the first spreading roller, L is a length of the first spreading roller, and W is load applied between the two spreading rollers. At least the first spreading roller is of the material meeting E.gtoreq.WL.sup.3 /(3.pi.D.sub.2.sup.4 .multidot.t) where t is thickness of the film unit. The spreading roller is prevented from easy deformation.
An instant camera for use with a film unit in which a solution pod contains processing solution, said camera having first and second rotatable spreading rollers for applying pressure to said film unit, said spreading rollers rotated to squeeze said pod, and exiting said film unit from a camera body while spreading said solution, said instant camera comprising:
A method of producing an instant camera for use with a film unit in which a solution pod contains processing solution, said camera having first and second rotatable spreading rollers for applying pressure to said film unit, said spreading rollers rotated to squeeze said pod, and exiting said film unit from a camera body while spreading said solution, said producing method comprising steps of:
An instant camera for use with a film unit in which a solution pod contains processing solution, said camera having first and second rotatable spreading rollers for applying pressure to said film unit, said spreading rollers rotated to squeeze said pod, and exiting said film unit from a camera body while spreading said solution, said instant camera comprising:
A method of producing an instant camera for use with a film unit in which a solution pod contains processing solution, said camera having first and second rotatable spreading rollers for applying pressure to said film unit, said spreading rollers rotated to squeeze said pod, and exiting said film unit from a camera body while spreading said solution, said producing method comprising steps of:
Dependencies are inferred from the claim text.