US 4,277,159 AGranted

Photo-processing drum with non-reusable chemicals, for use in daylight conditions, for processing photo-sensitive surfaces with flexible supports

OwnerMaurice J. Descotesinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A photo-processing drum with non-reusable chemicals, for use in daylight conditions, for processing photo-sensitive surfaces with flexible supports, which drum is constituted by two concentric cylinders, closed at one end by the same bottom wall. A flange closes at the other end, a passage provided between the two cylinders and a removable and light-tight cover fits into the free end of the inner cylinder. An axial orifice permits the introduction into the drum of the processing solutions. A slot, made in the wall of the inner cylinder and a joining surface allow the solution contained in the said cylinder to flow into the said passage and to be drained through a draining outlet, when the drum is rotated in one direction. The processing solutions are stirred during the processing step, by rotating the drum in the opposite direction.

Claims12

Dependent claims

A photo-processing drum with non-reusable chemicals for use in daylight conditions for processing photographic sensitive surfaces, of the type moving in rotation about its horizontal longitudinal axis in a first direction for recurringly dipping the sensitive surface in a processing solution, and in a second reverse direction for draining off the said processing solution from the said drum, and comprising:

an inner cylinder having two ends, a longitudinal axis, and a wall of circular cross-section,
a slot provided in the wall of said inner cylinder and having longitudinal edges defining with the axis of said inner cylinder two radial planes oriented at an angle of about 45.degree. with respect to each other,
an outer cylinder having two ends and a diameter greater than the one of said inner cylinder and being disposed concentrically around said inner cylinder,
a built-in bottom wall tightly sealing one of the ends of said inner and outer cylinders,
a removable cover adapted to tightly seal off the end of said inner and outer cylinders,
a removable cover adapted to tightly seal off the end of said inner cylinder opposite to its bottom wall,
a longitudinal slot cut in the wall of said outer cylinder, having two longitudinal edges and being positioned with respect to the slot of said inner cylinder so that the slot of said outer cylinder is situated at least approximately between the said two radial planes,
a joining wall connecting one of said longitudinal edges of the slot of said inner cylinder to the opposite far edge of the slot of said outer cylinder, and
an annular draining passage delimited by said two concentric inner and outer cylinders, by said joining wall, by said bottom wall and by a built-in flange tightly sealing the end of said annular draining passage which faces said removable cover, the slot of the said outer cylinder forming an outlet for said draining passage.

6 more elements

Dependencies are inferred from the claim text.