US3989859A — Coating entire surface of three-dimensional artic…

Claim 1

Independent Claim 246 words

A method of applying to a ring-like metal core member for a wire wound electrical component a smooth, unmarked and unbroken coating of insulation that uninterruptedly covers all surface portions of the core member, said method comprising: A. providing an elongated substantially cylindrical supporting member that has a diameter substantially smaller than the inside diameter of the core member; B. rotatably supporting said elongated substantially cylindrical supporting member at only one end thereof with its axis substantially horizontal; C. preheating the core member; D. slipping the preheated core member onto said supporting member from its unsupported end, and allowing the core member to hang on the supporting member with only an inner surface portion of the core member in contact with the supporting member; E. rotating said supporting member about its axis to thereby impart rotation to the core member and constantly change the location on the inner surface of the core member of the interface between it and the supporting member; F. while said members are rotating, applying a heat fusible plastic material in finely divided solid form to the entire surface of the core member, which upon contact with said surface melts and fuses thereto; G. abstracting heat from the supporting member to maintain it at a temperature below that at which the fusible material melts; and H. continuing to rotate the supporting member, with the core member hanging thereon, until the coating of fused material on the core member has attained substantial hardness.

Claim 2

Independent Claim 246 words

A method of applying to a ring-like metal core member for a wire wound electrical component a smooth, unmarked and unbroken coating of insulation that uninterruptedly covers all surface portions of the core member, said method comprising: A. providing an elongated substantially cylindrical supporting member that has a diameter substantially smaller than the inside diameter of the core member; B. rotatably supporting said elongated substantially cylindrical supporting member at only one end thereof with its axis substantially horizontal; C. preheating the core member; D. slipping the preheated core member onto said supporting member from its unsupported end, and allowing the core member to hang on the supporting member with only an inner surface portion of the core member in contact with the supporting member; E. rotating said supporting member about its axis to thereby impart rotation to the core member and constantly change the location on the inner surface of the core member of the interface between it and the supporting member; F. while said members are rotating, applying a heat fusible plastic material in finely divided solid form to the entire surface of the core member, which upon contact with said surface melts and fuses thereto; G. abstracting heat from the supporting member to maintain it at a temperature below that at which the fusible material melts; and H. continuing to rotate the supporting member, with the core member hanging thereon, until the coating of fused material on the core member has attained substantial hardness.

Claim 3

Dependent Claim 39 words

The method of claim 1, further characterized by: while the core member is hanging on the supporting member, exerting upon the core member a magnetic force that substantially restrains it against motion in directions axially of the supporting member.

Claim 4

Dependent Claim 37 words

The method of claim 1, wherein said plastic material is a thermosetting resinous material, and further characterized by: directing heat from a source thereof onto the coated core member to cure its coating of thermosetting resinous material.

Claim 5

Independent Claim 159 words

A method whereby a plastic material which is initially in heat fusible finely divided solid form and which, after fusion, heat cures to substantial hardness, can be applied to a curved surface portion of a heated workpiece and formed into a coating which covers the whole of said surface portion without break or blemish even though, during fusion and curing of said material, the workpiece must be supported by a contacting engagement against its said surface portion, said method being characterized by: A. during application of said material and fusion of the same, supporting the workpiece on rotatable supporting means which has limited contact with said surface portion of the workpiece and which, upon being rotated, can impart relative motion to the workpiece whereby the location of said limited contact is caused to move over said surface portion; and B. during fusion of the material and for a period thereafter during which the fused material solidifies to substantial hardness

Claim 6

Independent Claim 159 words

A method whereby a plastic material which is initially in heat fusible finely divided solid form and which, after fusion, heat cures to substantial hardness, can be applied to a curved surface portion of a heated workpiece and formed into a coating which covers the whole of said surface portion without break or blemish even though, during fusion and curing of said material, the workpiece must be supported by a contacting engagement against its said surface portion, said method being characterized by: A. during application of said material and fusion of the same, supporting the workpiece on rotatable supporting means which has limited contact with said surface portion of the workpiece and which, upon being rotated, can impart relative motion to the workpiece whereby the location of said limited contact is caused to move over said surface portion; and B. during fusion of the material and for a period thereafter during which the fused material solidifies to substantial hardness

Claim 7

Dependent Claim 45 words

rotating said supporting means to effect constant change in the location of said limited contact, and 2. cooling said rotatable supporting means to maintain the temperature thereof below the fusion temperature of said material, thus preventing the material from adhering to the rotatable supporting means.

Claim 8

Dependent Claim 45 words

rotating said supporting means to effect constant change in the location of said limited contact, and 2. cooling said rotatable supporting means to maintain the temperature thereof below the fusion temperature of said material, thus preventing the material from adhering to the rotatable supporting means.

Claim 9

Independent Claim 203 words

A method by which a workpiece that has a substantially arcuate surface portion can be provided with a coating of a plastic material which is initially in the form of a heat fusible finely divided solid and which, after fusion, hardens under the influence of continued heat application, said coating covering the whole of said surface portion of the workpiece and being unbroken and unblemished notwithstanding that the workpiece must be supported by an engagement against its said surface portion while the plastic material is fusing and hardening, said method comprising: A. heating the workpiece to a temperature at which said material in its initial form fuses; B. placing the workpiece on a rotatable supporting means which has only limited contact with said surface portion of the workpiece and which can impart relative motion to the workpiece by reason of such contact therewith and its own rotation; C. applying said material in its initial form on the heated workpiece, to cause the material to be fused into a coating on the workpiece by the heat thereof; and D. during the time that said material is fusing on the workpiece, and for a period thereafter during which the fused material solidifies to substantial hardness,

Claim 10

Independent Claim 203 words

A method by which a workpiece that has a substantially arcuate surface portion can be provided with a coating of a plastic material which is initially in the form of a heat fusible finely divided solid and which, after fusion, hardens under the influence of continued heat application, said coating covering the whole of said surface portion of the workpiece and being unbroken and unblemished notwithstanding that the workpiece must be supported by an engagement against its said surface portion while the plastic material is fusing and hardening, said method comprising: A. heating the workpiece to a temperature at which said material in its initial form fuses; B. placing the workpiece on a rotatable supporting means which has only limited contact with said surface portion of the workpiece and which can impart relative motion to the workpiece by reason of such contact therewith and its own rotation; C. applying said material in its initial form on the heated workpiece, to cause the material to be fused into a coating on the workpiece by the heat thereof; and D. during the time that said material is fusing on the workpiece, and for a period thereafter during which the fused material solidifies to substantial hardness,

Claim 11

Dependent Claim 60 words

rotating said rotatable supporting means to constantly bring different parts of the coating on said surface portion of the workpiece into and out of contact with the rotatable supporting means, and 2. cooling said rotatable supporting means to maintain the temperature thereof below the fusion temperature of said material, thereby preventing the material from adhering to the rotatable supporting means.

Claim 12

Dependent Claim 60 words

rotating said rotatable supporting means to constantly bring different parts of the coating on said surface portion of the workpiece into and out of contact with the rotatable supporting means, and 2. cooling said rotatable supporting means to maintain the temperature thereof below the fusion temperature of said material, thereby preventing the material from adhering to the rotatable supporting means.

Claim 13

Dependent Claim 30 words

The method of claim 5, wherein the rotatable supporting means is a tubular member, further characterized by: cooling said tubular member by circulating through it a fluid heat absorbing medium.

Claim 14

Dependent Claim 43 words

The method of claim 5, wherein the rotatable supporting means comprises an elongated substantially cylindrical member of good heat conducting material that is rotatable about its own axis, and further characterized by: cooling said cylindrical member by abstracting heat from one end thereof.

Claim 15

Dependent Claim 49 words

The method of claim 6, wherein said tubular member has a cantilevered support at one of its ends and is unsupported at its other end, and wherein the circulation of fluid heat absorbing medium through said tubular member is effected by: forcing gaseous carbon dioxide into its supported end.

Claim 16

Dependent Claim 180 words

In the art of coating workpieces with heat fusible and heat curable plastic material that is initially in finely divided solid form, wherein such material is deposited onto a workpiece while the latter is at an elevated temperature such that the deposited material adheres to the workpiece and fuses thereon and the deposited material is cured to substantial hardness by its continued subjection to heat for a time after its fusion, that improvement by which an unbroken and unblemished coating can be obtained on a surface of the workpiece even though support of the workpiece during the time of deposition, fusion and curing of the plastic material requires a contacting engagement against its said surface, which improvement is characterized by the steps of: A. supporting the workpiece on substantially round supporting means making only limited contact with said surface of the workpiece and which supporting means is rotatable about its own axis; and B. during the time that the plastic material is subjected to heat for fusion and curing, and until said material on the workpiece has attained substantial hardness,

Claim 17

Dependent Claim 180 words

In the art of coating workpieces with heat fusible and heat curable plastic material that is initially in finely divided solid form, wherein such material is deposited onto a workpiece while the latter is at an elevated temperature such that the deposited material adheres to the workpiece and fuses thereon and the deposited material is cured to substantial hardness by its continued subjection to heat for a time after its fusion, that improvement by which an unbroken and unblemished coating can be obtained on a surface of the workpiece even though support of the workpiece during the time of deposition, fusion and curing of the plastic material requires a contacting engagement against its said surface, which improvement is characterized by the steps of: A. supporting the workpiece on substantially round supporting means making only limited contact with said surface of the workpiece and which supporting means is rotatable about its own axis; and B. during the time that the plastic material is subjected to heat for fusion and curing, and until said material on the workpiece has attained substantial hardness,

Claim 18

Dependent Claim 49 words

by constantly rotating the supporting means, maintaining said workpiece in motion relative to said supporting means and thereby constantly shifting the location of said limited contact over said surface, and 2. cooling the supporting means to maintain it at a temperature below that at which the plastic material fuses.

Claim 19

Dependent Claim 49 words

by constantly rotating the supporting means, maintaining said workpiece in motion relative to said supporting means and thereby constantly shifting the location of said limited contact over said surface, and 2. cooling the supporting means to maintain it at a temperature below that at which the plastic material fuses.

Claim 20

Dependent Claim 174 words

In the art of coating workpieces with heat fusible and heat curable plastic material that is initially in finely divided solid form, wherein such material is deposited onto a workpiece while the latter is at an elevated temperature such that the deposited material adheres to the workpiece and fuses thereon and the deposited material is cured to substantial hardness by its continued subjection to heat for a time after its fusion, that improvement by which an unbroken and unblemished coating can be obtained on a surface of the workpiece even though said surface must have contacting engagement with supporting means during a time prior to the attainment of substantial hardness by such material on said surface, which improvement comprises: A. during said time supporting the workpiece on supporting means having a substantially rounded surface, and by rotating the supporting means producing a substantially rolling and constantly shifting contacting engagement between the workpiece and said supporting means; and B. meanwhile maintaining the supporting means at a temperature below that at which the plastic material fuses.

Claim 21

Dependent Claim 174 words

In the art of coating workpieces with heat fusible and heat curable plastic material that is initially in finely divided solid form, wherein such material is deposited onto a workpiece while the latter is at an elevated temperature such that the deposited material adheres to the workpiece and fuses thereon and the deposited material is cured to substantial hardness by its continued subjection to heat for a time after its fusion, that improvement by which an unbroken and unblemished coating can be obtained on a surface of the workpiece even though said surface must have contacting engagement with supporting means during a time prior to the attainment of substantial hardness by such material on said surface, which improvement comprises: A. during said time supporting the workpiece on supporting means having a substantially rounded surface, and by rotating the supporting means producing a substantially rolling and constantly shifting contacting engagement between the workpiece and said supporting means; and B. meanwhile maintaining the supporting means at a temperature below that at which the plastic material fuses.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1979-11-02	1980-05-03	1980-11-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1983-11-02	1984-05-03	1984-11-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1987-11-02	1988-05-03	1988-11-02	$7700.00	Window Closed / Lapsed

Coating entire surface of three-dimensional article with heat fusible plastic

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