Method for the production of a device for the transmission of a signal between two end points
First Claim
1. A method for making a device comprising a substantially circular cassette for transmitting a signal between two end points at least one of which is movable relative to the other, wherein the device is adapted to hold a wound cable which forms a coil between the two end points, wherein extending lines are connected to the cable at the two end points, and wherein the cassette comprises two parts, a first of said parts being a stator, and a second of said parts being a rotor which rotates around an axis and around the stator, the method comprising the steps of:
- injection molding said first cassette part using a first mold, said first cassette part comprising a first annular disk with a first cylindrical tube extending concentrically from said firs disk;
providing a second mold comprising said first cassette part, and a further mold part extending into said first tube of said first cassette part;
injection molding said second cassette part using said second mold, said second cassette part comprising a second annular disk with a second cylindrical tube extending concentrically from said second disk, said second tube, while in said second mold, being disposed between said further mold part and said first tube; and
cooling said second tube to obtain a shrinking of said second tube away from said first tube to produce a gap between said first and said second tubes, said gap allowing said cassette parts to rotate relative to each other around a common axis of said two cassette parts.
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Abstract
A method is described for the production of a device for transmitting a signal between two end points, at least one of which is movable relative to the other, and between which a wound line which forms a coil and is contained in a substantially circular cassette is arranged. Further extending lines are connected to the line at the two end points. The cassette consists of two parts, namely a stator and a rotor which is turnable around its axis and around the stator. The two parts of the cassette are connected in secure manner to each other by injection molding, in such a way that the rotor is turnable around a common axis within the stator.
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Citations
7 Claims
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1. A method for making a device comprising a substantially circular cassette for transmitting a signal between two end points at least one of which is movable relative to the other, wherein the device is adapted to hold a wound cable which forms a coil between the two end points, wherein extending lines are connected to the cable at the two end points, and wherein the cassette comprises two parts, a first of said parts being a stator, and a second of said parts being a rotor which rotates around an axis and around the stator, the method comprising the steps of:
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injection molding said first cassette part using a first mold, said first cassette part comprising a first annular disk with a first cylindrical tube extending concentrically from said firs disk; providing a second mold comprising said first cassette part, and a further mold part extending into said first tube of said first cassette part; injection molding said second cassette part using said second mold, said second cassette part comprising a second annular disk with a second cylindrical tube extending concentrically from said second disk, said second tube, while in said second mold, being disposed between said further mold part and said first tube; and cooling said second tube to obtain a shrinking of said second tube away from said first tube to produce a gap between said first and said second tubes, said gap allowing said cassette parts to rotate relative to each other around a common axis of said two cassette parts. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification