US4089719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for feeding reinforcing strand when making a tubular product
Assignee: Individual
•
Filing: 1976-12-23
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Granted: 1978-05-16
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Expires: 1996-12-23
Abstract
Abstract In a method for feeding reinforcing strand when making a tubular product of plastic or other synthetic material, comprising supplying helically a supporting strand during rotation of a tube blank and applying a longitudinal reinforcing strand to the blank, the longitudinal reinforcement strand is in form of pieces cut off from a continuous strand after abutment thereof against the supporting strand. The continuous strand gradually displaces the cut off lengths of strand during the rotation of the tube blank. An apparatus for carrying out the method comprises means for feeding support helically around a rotating tube blank, means for feeding portions of additional reinforcing strand oriented in the direction of the tube blank to place the portions between the supporting strands and the tube blank, and means for cutting off said axially orientated reinforcing strands. The cutting is carried out when the strand portion is held by at least one supporting strand.
Inventors
- 👤 Olof Sundell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:35
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/8008; B29C53/805; B29C53/8058; F; F16; F16L; F16L9/00; F16L9/12
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
86 words
A method for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: continuously feeding at least two first strands transversely towards the tube blank, continuously winding consecutive loops of a second strand around said first strand, and cutting one side of each loop while the other side of the loop is supported between said first strands and the tube blank.
Claim 2
Independent Claim
86 words
A method for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: continuously feeding at least two first strands transversely towards the tube blank, continuously winding consecutive loops of a second strand around said first strand, and cutting one side of each loop while the other side of the loop is supported between said first strands and the tube blank.
Claim 3
Dependent Claim
37 words
A method according to claim 1, wherein the loops are wound around said first strands and a support spaced from said strands in a direction away from said tube blank, the cutting being performed near said support.
Claim 4
Independent Claim
135 words
A method for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: continuously feeding at least two first strands transversely towards a support roll, continuously winding consecutive loops of a second strand around said first strands, continously feeding at least two third strands transversely towards said support roll to the opposite side of said loops with respect to said first strands, cutting one side of each loop while the other side of the loop is supported between said first and third strands and against said support roll, and feeding the tape formed by said first and third strands and said cut loops onto the surface of said tube blank.
Claim 5
Independent Claim
135 words
A method for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: continuously feeding at least two first strands transversely towards a support roll, continuously winding consecutive loops of a second strand around said first strands, continously feeding at least two third strands transversely towards said support roll to the opposite side of said loops with respect to said first strands, cutting one side of each loop while the other side of the loop is supported between said first and third strands and against said support roll, and feeding the tape formed by said first and third strands and said cut loops onto the surface of said tube blank.
Claim 6
Dependent Claim
37 words
A method according to claim 3, wherein the loops are wound around said first strands and a support spaced from said strands in a direction away from said tube blank, the cutting being performed near said support.
Claim 7
Dependent Claim
23 words
A method according to claim 3, wherein each of said third strands is fed to a position opposite one of said first strands.
Claim 8
Independent Claim
94 words
An apparatus for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: means for feeding continuously at least two first strands transversely towards the tube blank, means for feeding and winding continuously a second strand in consecutive loops around said first strands, and means for cutting one side of each loop while the other side of the loop is supported between said first strands and the tube blank.
Claim 9
Independent Claim
94 words
An apparatus for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: means for feeding continuously at least two first strands transversely towards the tube blank, means for feeding and winding continuously a second strand in consecutive loops around said first strands, and means for cutting one side of each loop while the other side of the loop is supported between said first strands and the tube blank.
Claim 10
Dependent Claim
31 words
An apparatus according to claim 6, wherein the means for feeding said first strands comprise pulleys which are adjustably spaced from each other in the longitudinal direction of the tube blank.
Claim 11
Dependent Claim
43 words
An apparatus according to claim 6, wherein the means for feeding and winding said second strand comprise a rotating spreader for forming said loops around said first strands, said spreader being arranged symmetrically with respect to the feeding means for the first strands.
Claim 12
Dependent Claim
34 words
An apparatus according to claim 8, wherein the inclination of the axis of the strand spreader in relation to the direction of the supporting strands before the contact with the tube blank is adjustble.
Claim 13
Dependent Claim
22 words
An apparatus according to claim 6, wherein the cutting means comprise a cutter disk and a flexible roll mounted to cooperate therewith.
Claim 14
Dependent Claim
21 words
An apparatus according to claim 10, wherein the cutter disk is mounted to be driven by one of the supporting strands.
Claim 15
Dependent Claim
21 words
An apparatus according to claim 10, wherein the flexible roll is mounted to be driven by one of the supporting strands.
Claim 16
Independent Claim
166 words
An apparatus for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: a support roll at a distance from the tube blank and parallel therewith, means for feeding continuously at least two first strands transversely around said support roll and towards the tube blank, means for feeding and winding continuously a second strand in consecutive loops around said first strands, means for feeding at least two third strands transversely around said support roll and towards the tube blank to the opposite side of said loops with respect to said first strands, and means for cutting one side of each loop while the other side of the loop is supported between said first and third strands and against said support roll, whereby a tape is formed at the support roll and is then fed onto the surface of the tube blank.
Claim 17
Independent Claim
166 words
An apparatus for forming a continuous tape comprising at least two longitudinal strands and transverse cut strands and for applying the tape onto the surface of a tube blank which is continuously rotated and simultaneously moved longitudinally, comprising: a support roll at a distance from the tube blank and parallel therewith, means for feeding continuously at least two first strands transversely around said support roll and towards the tube blank, means for feeding and winding continuously a second strand in consecutive loops around said first strands, means for feeding at least two third strands transversely around said support roll and towards the tube blank to the opposite side of said loops with respect to said first strands, and means for cutting one side of each loop while the other side of the loop is supported between said first and third strands and against said support roll, whereby a tape is formed at the support roll and is then fed onto the surface of the tube blank.
Claim 18
Dependent Claim
31 words
An apparatus according to claim 13, wherein the means for feeding said first strands comprise pulleys which are adjustbly spaced from each other in the longitudinal direction of the support roll.
Claim 19
Dependent Claim
43 words
An apparatus according to claim 13, wherein the means for feeding and winding said second strand comprise a rotating spreader for forming said loops around said first strands, said spreader being arranged symmetrically with respect to said feeding means for the first strands.
Claim 20
Dependent Claim
22 words
An apparatus according to claim 13, wherein the cutting means comprise a cutter disk and a flexible roll mounted to cooperate therewith.
Claim 21
Dependent Claim
21 words
An apparatus according to claim 16, wherein the flexible roll is mounted to be driven by one of the supporting strands.
Claim 22
Dependent Claim
21 words
An apparatus according to claim 16, wherein the cutter disk is mounted to be driven by one of the supporting strands.
Claim 23
Dependent Claim
34 words
An apparatus according to claim 18, wherein the inclination of the axis of the strand spreader in relation to the direction of the supporting strands before the contact with the support roll is adjustable.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |