Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
358 words
A device for forming a copy of an image by utilizing the temperature dependency of the magnetic permeability of a magnetizable material, comprising, in combination, a cylindrical wall having a substantially horizontal axis, defining an inner cavity and formed at its outer surface with a plurality of closely spaced grooves extending along the length of the cylindrical wall; means for introducing magnetizable pulverulent material into said grooves at a portion of the outer periphery of said cylindrical wall which is upstream of the top portion of the rotating wall; means for passing concurrent with the rotation of said cylindrical wall an image carrying sheet along the top portion of the same, and a carrier sheet for the image to be formed along the bottom portion of said cylindrical wall so that when said cylindrical wall serves as a printing cylinder, said carrier sheet passes said cylinder in a printing plane and contacts said cylinder along a printing line formed by the lowermost portion of said cylinder; heating means for heating said image carrying sheet in the area of contact of the same with the outer surface of said cylinder so that said magnetizable material in the grooves located in said area of contact will be selectively heated according to a pattern corresponding to said image thereby forming in Said magnetizable material in said grooves a selective pattern of predetermined magnetic permeability corresponding to said image; magnetic means located in the cavity of said cylindrical wall adjacent the portion of the cylindrical wall passing from said area towards said printing line for holding in said grooves only the portions of said magnetic pulverulent material forming said selective pattern of predetermined permeability while allowing the other portions of said pulverulent material to fall off said cylindrical wall, said magnetic means terminating adjacent to but spaced from the radial plane of said cylindrical wall passing through said printing line, whereby at said printing line said pulverulent material forming said selective pattern will no longer be subjected to the magnetic force of said magnetic means and will drop from said grooves onto said carrier sheet forming thereon a copy of said image.
Claim 2
Independent Claim
358 words
A device for forming a copy of an image by utilizing the temperature dependency of the magnetic permeability of a magnetizable material, comprising, in combination, a cylindrical wall having a substantially horizontal axis, defining an inner cavity and formed at its outer surface with a plurality of closely spaced grooves extending along the length of the cylindrical wall; means for introducing magnetizable pulverulent material into said grooves at a portion of the outer periphery of said cylindrical wall which is upstream of the top portion of the rotating wall; means for passing concurrent with the rotation of said cylindrical wall an image carrying sheet along the top portion of the same, and a carrier sheet for the image to be formed along the bottom portion of said cylindrical wall so that when said cylindrical wall serves as a printing cylinder, said carrier sheet passes said cylinder in a printing plane and contacts said cylinder along a printing line formed by the lowermost portion of said cylinder; heating means for heating said image carrying sheet in the area of contact of the same with the outer surface of said cylinder so that said magnetizable material in the grooves located in said area of contact will be selectively heated according to a pattern corresponding to said image thereby forming in Said magnetizable material in said grooves a selective pattern of predetermined magnetic permeability corresponding to said image; magnetic means located in the cavity of said cylindrical wall adjacent the portion of the cylindrical wall passing from said area towards said printing line for holding in said grooves only the portions of said magnetic pulverulent material forming said selective pattern of predetermined permeability while allowing the other portions of said pulverulent material to fall off said cylindrical wall, said magnetic means terminating adjacent to but spaced from the radial plane of said cylindrical wall passing through said printing line, whereby at said printing line said pulverulent material forming said selective pattern will no longer be subjected to the magnetic force of said magnetic means and will drop from said grooves onto said carrier sheet forming thereon a copy of said image.
Claim 3
Dependent Claim
16 words
A device as defined in claim 1, wherein said cylindrical wall is formed of translucent material.
Claim 4
Dependent Claim
15 words
A device as defined in claim 2, wherein said cylindrical wall is formed of glass.
Claim 5
Dependent Claim
20 words
A device as defined in claim 2, wherein said cylindrical wall is formed of synthetic material of low heat conductivity.
Claim 6
Dependent Claim
22 words
A device as defined in claim 1, wherein said grooves define a scoop-wheel-shaped configuration at the outer periphery of said cylindrical wall.
Claim 7
Dependent Claim
17 words
A device as defined in claim 1, wherein said heating means is located outside said cylindrical wall.
Claim 8
Dependent Claim
21 words
A device as defined in claim 1, wherein said heating means is located within said inner cavity by said cylindrical wall.
Claim 9
Dependent Claim
39 words
A device as defined in claim 1, wherein said magnetic means includes a curved permanently magnetic plate located inwardly of and closely adjacent to the portion of the cylindrical wall passing from said heating means towards said printing line.
Claim 10
Dependent Claim
21 words
A device as defined in claim 1, and including fixing means for fixing the image-forming pulverulent material to said carrier sheet.
Claim 11
Dependent Claim
38 words
A device as defined in claim 9, wherein said pulverulent material includes a low melting component and said fixing means includes second heating means for melting said component and thereby fixing the pulverulent material to said carrier sheet.