US4160371A
Expired / Lapsed
US
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Apparatus for making a spiral coil having spaced turns
Assignee: IOG INDUSTRIE OFENBAU GmbH
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Filing: 1977-12-07
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Granted: 1979-07-10
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Expires: 1997-12-07
Abstract
Abstract A method for winding a spiral coil involving the steps of winding a metal band on a mandrel while in advance of the mandrel continuously forming a succession of regularly-spaced deformations in the band edges which protrude alternately from the opposite band surfaces to space the coil turns. During the winding, and for each successive turn, the sequence of deformations is shifted along the band, in one direction or the opposite, by a predetermined dimension such that oppositely-protruding deformations on adjacent turns come into tangential locking engagement with each other at the start of every succeeding turn and all projections on each turn come into such locking engagement. Apparatus for performing the method is also disclosed.
Inventors
- 👤 Hermann Wilkening
- 👤 Hans-Joachim Loges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:58
CPC Classifications
B; B21; B21C; B21C47/00; B21C47/26; B21C47/28; B21C47/30; B65; B65H; B65H2403/00; B65H2403/40; B65H2403/48; B65H2403/481
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
152 words
Apparatus for making a spiral coil comprising: (a) a winding mandrel including drive means to rotate the mandrel, (b) means for moving a band in uncoiled condition toward, onto and about said mandrel to form the band into a coil, (c) means in advance of said mandrel for continuously forming a succession of regularly spaced deformations in the edges of the band, the deformations alternately protruding from opposite surfaces of the band to determine the spacing of adjacent turns of a coil formed on the mandrel, and (d) means for progressively shifting said succession of deformations along said band for each successive turn of the coil by a predetermined dimension such that all oppositely protruding deformations in adjacent turns come into tangential interlocking engagement with each other, such predetermined dimension of shift taking into account the increase in turn length due to band thickness and coil spacing and the spacing between deformations.
Claim 2
Dependent Claim
152 words
Apparatus for making a spiral coil comprising: (a) a winding mandrel including drive means to rotate the mandrel, (b) means for moving a band in uncoiled condition toward, onto and about said mandrel to form the band into a coil, (c) means in advance of said mandrel for continuously forming a succession of regularly spaced deformations in the edges of the band, the deformations alternately protruding from opposite surfaces of the band to determine the spacing of adjacent turns of a coil formed on the mandrel, and (d) means for progressively shifting said succession of deformations along said band for each successive turn of the coil by a predetermined dimension such that all oppositely protruding deformations in adjacent turns come into tangential interlocking engagement with each other, such predetermined dimension of shift taking into account the increase in turn length due to band thickness and coil spacing and the spacing between deformations.
Claim 3
Dependent Claim
49 words
Apparatus according to claim 1, wherein said means (d) for progressively shifting said succession of deformations along the band includes a signal means rotating with the winding mandrel and effective to trigger an adjustment command operative to initiate the shift of said succession of deformations by said predetermined amount.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 2, wherein said signal means includes a cam element secured to said mandrel to rotate therewith, and cooperating follower means moved by said cam element once during each revolution of the mandrel.
Claim 5
Dependent Claim
41 words
Apparatus according to claim 3, wherein said cam element and follower are arranged to engage and issue said adjustment command during each revolution of the mandrel at the same angular position of the mandrel with respect to its axis of rotation.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 4, wherein said cam element and follower are arranged to engage and issue said adjustment command at the start of every succeeding turn of the band on the mandrel.
Claim 7
Dependent Claim
59 words
Apparatus according to claim 4, wherein said means (d) for progressively shifting said succession of deformations along the band includes an activating member for actuating said means (d), and delay means for delaying slightly the shifting of the deformations in terms of time with respect to the shift triggered during the preceding turn of the band on the mandrel.
Claim 8
Dependent Claim
87 words
Apparatus for making a spiral coil according to claim 1, wherein said means (c) for forming a succession of deformations comprises a plurality of pairs of tool carrier wheels, the wheels of a pair being disposed on opposite sides of an edge area of the band, each of said wheels circumferentially carrying dies and die cavities for forming said deformations, and means for rotating said tool carrier wheels synchronously with respect to each other and a given amount per turn of the band on the winding mandrel.
Claim 9
Dependent Claim
102 words
Apparatus according to claim 7, wherein said means for rotating said tool wheels includes a tooth wheel (121) arranged swingably about its own axis and fixed to one tool carrier wheel of a pair, said tooth wheel meshing with an identical tooth wheel (12) to establish the forced synchronization of both tool carrier wheels of a pair, said tooth wheel (121) having spherically designed gear rim outside surfaces and teeth, whereby in case of unchangeable axial interval, the changing of the adjustment of the tool wheels to adapt to differing band thicknesses and differing depressions of the edge deformations may be accomplished.
Claim 10
Dependent Claim
41 words
Apparatus according to claim 7, wherein said means (d) for progressively shifting said succession of deformations along the band comprises means for changing said given amount of rotation of the tool carrier wheels per turn of the band on the mandrel.
Claim 11
Dependent Claim
116 words
Apparatus according to claim 7, wherein said pairs of tool carrier wheels includes two pairs of identical tool carrier wheels arranged one behind the other in the band direction and said means (d) for progressively shifting said succession of deformations comprises means for adjusting the mutual axial spacing of the two identical pairs of wheels in a continually changing manner, and means for moving the axes of the wheels of each pair of said identical tool carrier wheels toward and away from the band so as to cause the two pairs of identical tool carrier wheels to be alternately operative to form said deformations in the band during successive turns of the band about the mandrel.
Claim 12
Dependent Claim
53 words
Apparatus for making a spiral coil according to claim 7, wherein the number of dies and die cavities in the corresponding tool carrier wheels of a pair are equal and their mutual spacing is the same, a die and a die cavity following each other on the circumferences of the tool carrier wheels.
Claim 13
Dependent Claim
53 words
Apparatus for making a spiral coil according to claim 7, wherein the number of dies and die cavities in the corresponding tool carrier wheels of a pair are unequal and their mutual spacing is the same, a die and a die cavity following each other on the circumferences of the tool carrier wheels.
Claim 14
Dependent Claim
31 words
Apparatus according to claim 7, wherein the number of dies and die cavities in the corresponding tool carrier wheels of a pair are unequal and their mutual spacing is approximately identical.
Claim 15
Dependent Claim
72 words
Apparatus according to claim 9, wherein said means for changing said amount of rotation of the tool carrier wheels comprises a planetary gear inserted in the drive which forms part of said means for rotating the tool carrier wheels synchronously, said planetary gear having a sun wheel, and gear means acting upon said sun wheel and forming part of said means for changing the amount of rotation of the tool carrier wheels.
Claim 16
Dependent Claim
66 words
Apparatus according to claim 7, wherein the tool carrier wheels are each equipped with a downholder disc whose rim engages an edge area of the band and which rotates freely with respect to its tool wheel, each of said tool wheels and downholder discs having a common axis of rotation but separate drives, the downholder disc being mounted elastically with respect to its axis of rotation.
Claim 17
Dependent Claim
31 words
Apparatus according to claim 15, wherein the downholder discs are provided with a beveled rim portion to accommodate band edge areas which are bent out of the plane of the band.
Claim 18
Dependent Claim
81 words
Apparatus according to claim 7, wherein said means for rotating said tool wheels includes grooved roller gears and drive output spindles, with identical changeable angles of inclination toward their band edge, so as to permit the adaptation of the axial spacing of the tool carrier wheels of a tool carrier wheel pair to differing band thicknesses and differing dimensions in the direction of said thicknesses of the edge deformations and for exact synchronization between the tool carrier wheels of each pair.
Claim 19
Dependent Claim
56 words
Apparatus according to claim 7, wherein said tool carrier wheels of each pair have a fixed axial spacing, and the dies and die cavities carried by each wheel are radially adjustable for the purpose of changing tool adjustments to accomodate differing band thicknesses and differing dimensions in the direction of said thicknesses of the edge deformations.
Claim 20
Dependent Claim
88 words
Apparatus according to claim 7, wherein said tool carrier wheels include downholder rings which are secured by embedment in elastic rings fixed to the tool wheels in the plane of the die cavities and dies, said rings, during the operation of the tool carrier wheels to form edge deformations in the band, adjusting under higher pressure to permit the dies to protrude a greater amount beyond the outer perimeters of the downholder rings, so that the dies in cooperation with the die cavities produce correspondingly deeper edge deformations.
Claim 21
Dependent Claim
51 words
Apparatus according to claim 7, wherein each of said die cavities is divided in two parts, elastic means supporting said parts radially and tangentially in an opening of its tool wheel, said parts spreading apart against the elastic closing force of their support means to automatically adjust to greater band thickness.
Claim 22
Dependent Claim
69 words
Apparatus according to claim 7, wherein the axes of the tool carrier wheels are swingable laterally toward both edges of the moving band independently of each other by a small angle in the band plane so that the tool carrier wheels can follow width changes of the band along both edges independently of each other without generating a force that tends to arch the band in a lateral direction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-09 | 1983-01-08 | 1983-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-09 | 1987-01-08 | 1987-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-09 | 1991-01-08 | 1991-07-10 | $7700.00 | Window Closed / Lapsed |