EP0056704A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Coating apparatus and process
Assignee: Rio Tinto Alcan International Ltd
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Filing: 1982-01-12
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Granted: —
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Expires: 2002-01-12
Abstract
Abstract In the coating of a strip article of indeterminate length, wherein the article is continuously advanced lengthwise past a dam while liquid coating material is supplied to a major surface of the article ahead of the dam, the article is passed through a gap of extended length immediately beyond the dam, the gap being defined between uniformly spaced walls one of which faces the article surface bearing the coating material. The spacing between the gap walls is equal to the thickness of the strip article plus a desired wet thickness of the layer of coating material. Coating material of different colours or shades may be supplied to different portions of the strip surface for producing coatings of varied patterns.
Inventors
- 👤 Carl A. Wollam
- 👤 J. Lynn Gailey
- 👤 Alexander A. Chalmers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:10
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/06; B05C; B05C3/00; B05C3/18; B05C5/00; B05C5/02; B05C5/0254; B05C5/0266; B05C5/027; B05C5/0275; B05C5/0279; B05C9/00; B05C9/06; B05D1/00; B05D1/26; B05D1/265; B05D1/34; B05D2252/00; B05D2252/02
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
116 words
A process for coating a major surface of a strip article of indeterminate length, including the steps of continuously advancing the article longitudinally past a dam extending transversely of said major surface in adjacent spaced relation thereto while supplying a flowable liquid coating material to said major surface immediately ahead of said dam, characterized in that, immediately beyond said dam, said article is advanced longitudinally past a wall of extended length in the direction of strip advance and facing said major surface while the strip is uniformly restrained against movement of said major surface away from said wall beyond a predetermined distance equal to a desired wet thickness of said coating material on said major surface.
Claim 2
Dependent Claim
116 words
A process for coating a major surface of a strip article of indeterminate length, including the steps of continuously advancing the article longitudinally past a dam extending transversely of said major surface in adjacent spaced relation thereto while supplying a flowable liquid coating material to said major surface immediately ahead of said dam, characterized in that, immediately beyond said dam, said article is advanced longitudinally past a wall of extended length in the direction of strip advance and facing said major surface while the strip is uniformly restrained against movement of said major surface away from said wall beyond a predetermined distance equal to a desired wet thickness of said coating material on said major surface.
Claim 3
Dependent Claim
51 words
A process according to claim 1, characterized in that said article is restrained as aforesaid by a second wall spaced uniformly from the first-mentioned wall to define therewith a gap through which the article passes, and in that said article passing through said gap moves relative to both of said walls.
Claim 4
Dependent Claim
42 words
- A process according to claim 1 or claim 2, characterized in that the step of supplying the coating material includes supplying coating materials of differing compositions to different portions of said major surface across the width thereof ahead of said dam.
Claim 5
Dependent Claim
21 words
A process according to claim 3, characterized in that said different compositions of coating material differ from each other in colour.
Claim 6
Dependent Claim
44 words
A process according ta claim 3 or claim 4, characterized by the step of varying the supply of different coating material compositions to said major surface immediately ahead of said dam for producing variations in coating appearance along the length of said major surface.
Claim 7
Dependent Claim
49 words
A process according to any one of claims 1 to 6, characterized in that further wet flowable coating material is supplied to said major surface at one or more locations downstream of the dam, which further coating material is of different composition to that applied upstream of the dam.
Claim 8
Dependent Claim
34 words
A process as claimed in claim 1, characterized in that said article is restrained as aforesaid by an endless surface moving continuously in the same direction and at the same rate as said article.
Claim 9
Dependent Claim
43 words
A process according to claim 7, characterized in that a fully enclosed reservoir of said coating materiak is provided immediately ahead of said dam and said coating material is delivered to said reservoir under positive pressure for maintaining said reservoir entirely filled therewith.
Claim 10
Dependent Claim
70 words
A process according to claim 1, further characterized by the step of delivering, through at least one aperture in said wall, at least one further liquid coating material to said gap under pressure sufficient to displace locally the first said liquid coating material in the wet coating layer which is already on said major surface, thereby to establish a stripe of the second liquid coating material in the coating layer.
Claim 11
Dependent Claim
43 words
A process according to claim 9, characterized in that said first and further coating materials are pigmented, and differ from each other in pigmentation, such that said stripe is visibly distinguishable from portions of said coating layer constituted of said first coating material.
Claim 12
Dependent Claim
73 words
A process according to claim 9 or claim 10, further characterized by the step of selectively moving a portion of said wall, beyond said one aperture, in a direction parallel to said major surface and transverse to the direction of article advance, during advance of the article and delivery of said further coating material through said one aperture, for effecting blending of said first and further coating materials in and adjacent said stripe.
Claim 13
Dependent Claim
47 words
A process according to claim 11, characterized in that said wall is planar and has a movable portion comprising a disk rotatable about an axis perpendicular to the plane of the wall, and wherein the moving step comprises effecting annular movement of said disk about said axis.
Claim 14
Dependent Claim
69 words
A process according to claim 9, further characterized by the step of moving said one aperture in a direction parallel to said major surface and transverse to the direction of article advance, during advance of the article and delivery of said further coating material through said one aperture, for progressively changing the location of said stripe, along the length of said article, relative to the sides of said article.
Claim 15
Dependent Claim
56 words
A process according to claim 13, characterised in that said wall is planar and has a movable portion comprising a disc rotatable about an axis perpendicular to the plane of the wall, said one aperture being located in said disc, and in that the moving step comprises effecting angular movement of said disc about said axis.
Claim 16
Dependent Claim
58 words
A process according to claim 9, characterized in that said further liquid coating material is delivered to said gap under pressure as aforesaid through a plurality of apertures spaced apart in said wall transversely of the direction of strip advance, thereby to establish a corresponding plurality of stripes of said further liquid coating material in said coating layer.
Claim 17
Dependent Claim
62 words
A process according to claim 15, further characterized by the step of progressively moving said apertures, parallel to said major surface and transversely of the direction of article advance, during advance of the article and delivery of said further coating material, for progressively varying the locations of the stripes, along the length of the article, relative to the sides of the article.
Claim 18
Dependent Claim
24 words
A process according to claim 16, characterized in that the aperture-moving step comprises moving the apertures for progressively varying the spacing between the stripes.
Claim 19
Dependent Claim
49 words
A process according to claim 17, characterized in that said wall is planar and has a movable portion comprising a disc rotatable about an axis perpendicular to said major surface, said apertures being located in said disc, and the aperture-moving step comprises angularly displacing said disc about said axis.
Claim 20
Dependent Claim
44 words
A process according to claim 18, characterized in that said apertures are aligned in a plurality of rows eccentric to said axis, with at least one of said rows oriented at an acute angle with respect to at least one other of said rows.
Claim 21
Dependent Claim
138 words
Apparatus for forming a continuous adherent coating layer on a major surface of a strip article of indeterminate length, comprising means defining a path of advance of said article lengthwise of itself, means consituting a dam extending transversely of the path of article advance so as to be disposed in adjacent spaced relation to said major surface of the article, and means for supplying a wet flowable coating material to said major surface ahead of said dam, characterized in that said means defining the path of advance includes an extended wall facing said major surfaces of said article and so arranged that the advancing article moves longitudinally relative thereto, and means for uniformly restraining said article against movement of said major surface away from said wall beyond a predetermined distance during advance of said article past said wall.
Claim 22
Dependent Claim
138 words
Apparatus for forming a continuous adherent coating layer on a major surface of a strip article of indeterminate length, comprising means defining a path of advance of said article lengthwise of itself, means consituting a dam extending transversely of the path of article advance so as to be disposed in adjacent spaced relation to said major surface of the article, and means for supplying a wet flowable coating material to said major surface ahead of said dam, characterized in that said means defining the path of advance includes an extended wall facing said major surfaces of said article and so arranged that the advancing article moves longitudinally relative thereto, and means for uniformly restraining said article against movement of said major surface away from said wall beyond a predetermined distance during advance of said article past said wall.
Claim 23
Dependent Claim
40 words
Apparatus as claimed in claim 20, characterized in that the end of said wall remote from said one end is formed as a sharp edge for preventing cavitation of wet coating material on said major surface advancing beyond the wall.
Claim 24
Dependent Claim
36 words
Apparatus as claimed in claim 20 or claim 21, characterized in that the dam at said one end of said wall has a surface gradually and progressively approaching said wall in the direction of strip advance.
Claim 25
Dependent Claim
61 words
Apparatus as claimed in any one of claims 20 to 22 characterized by two equidistantly spaced rigid plates, having facing surfaces respectively constituting said wall and said restraining means, a surface portion of one of said plates at the inlet end of the space between the plates constituting said dam, and means for fixedly securing said plates relative to each other.
Claim 26
Dependent Claim
25 words
Apparatus as claimed in claim 23 characterized in that said securing means is adjustable for varying the spacing between said facing surfaces of said plates.
Claim 27
Dependent Claim
42 words
Apparatus as claimed in any one of claims 20 to 24, characterized in that the coating material supplying means includes means for delivering at least two different coating material compositions to different portions of - said major surface ahead of said dam.
Claim 28
Dependent Claim
39 words
Apparatus as claimed in any one of claims 20 to 25 characterized in that said restraining means comprises an endless surface movable in the same direction and at the same rate as a strip article advancing in said path.
Claim 29
Dependent Claim
38 words
Apparatus as defined in claim 26, characterised in that said restraining means comprises a rotatably mounted roll having a cylindrical periphery constituting said endless surface and in that said wall is curved in conformity with the roll periphery.
Claim 30
Dependent Claim
46 words
Apparatus as claimed in claim 27, characterized in that said roll is mounted for rotation about an axis parallel to and lying generally in the same common horizontal plane as the dam, and in that said wall is movable horizontally toward and away from said roll.
Claim 31
Dependent Claim
39 words
Apparatus as claimed in any one of claims 20 to 28, characterized in that said supplying means comprises means for establishing and maintaining an enclosed reservoir of wet flowable coating material ahead of and in contact with said dam.
Claim 32
Dependent Claim
25 words
Apparatus as c aimed in claim 29, further characterized by means for varying the length of said reservoir in a direction transversely of the strip.
Claim 33
Dependent Claim
62 words
Apparatus as claimed in claim 29 or claim 30, characterized in that said reservoir is in the form of an elongate trench opening toward said article major surface along the length of said dam and otherwise fully enclosed, and in thst means is provided for supplying said coating material under positive pressure to said trench to maintain said trench entirely filled therewith.
Claim 34
Dependent Claim
68 words
Apparatus as claimed in any one of claims 20 to 24 further characterized by means for delivering, through at least one aperture in said wall, to at least one locality in said gap, a further liquid coating material under pressure sufficient to displace locally the first liquid coating material in the coating layer, thereby to establish a stripe of said further liquid coating material in the coating layer.
Claim 35
Dependent Claim
72 words
Apparatus as claimed in claim 32, characterized in that said wall is planar and includes a portion constituted by a disc having a surface coplanar with said wall and in that a plurality of said apertures open throu said disc surface at spaced locations, said disc being mounted for rotation about an axis perpendicular to said wall, means being provided for supplying said further liquid coating material under pressure through said apertures.
Claim 36
Dependent Claim
22 words
Apparatus as claimed in claim 33, characterized in that said apertures are aligned in at least one row eccentric to said axis.
Claim 37
Dependent Claim
116 words
Apparatus as claimed in claim 33 or claim 34, characterized in that structure having an extended planar surface constituting a fixed portion of said wall, and with a transverse edge constituting said dam, has a circular recess within which said disc is received, said disc being fabricated of magnetic material and in that there is provided stop means projects into said recess to bear against said disc and is adjustably mounted in said structure for movement in a direction perpendicular to the plane of said wall to position said disc surface in coplanar relation to said fixed wall portion; and magnet means mounted in said structure for attracting said disc into engagement with said stop means.
Claim 38
Dependent Claim
30 words
Apparatus as claimed in claim 32, characterized in that said wall has a groove formed therein, extending from said one aperture generally in the direction of advance of said article.
References Cited (Backward Citations)
No citation records indexed.
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