US3646793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for manufacturing a helically preformed element
Assignee: Individual
•
Filing: 1969-09-22
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Granted: 1972-03-07
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Expires: 1989-09-22
Abstract
Abstract The invention relates to a device for continuously manufacturing a helically preformed element of any desired length by unwinding a flat bar from a drum on which the bar is wound in coils, feeding the bar between a group of rolls and into a first die and extruding the same therefrom into a flat bar of arcuate section and forming the flat bar thus formed arcuate in section into a helix by extruding same from a second die.
Inventors
- 👤 Tatsuo Teraoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:57
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/06; H; H02; H02G; H02G1/00; H02G1/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
134 words
A device for manufacturing a helical element comprising a group of rolls and a first die, said group of rolls and first die being adapted to feed forward a flat bar and to form said bar successively into a flat bar of completely arcuate section, and a second die for forming said arcuate flat bar into a helix, said second die comprising an outer metal cylinder and an inner cylindrical metal core, said metal core being provided on its outer surface with a helical groove of arcuate section, said first die being disposed along the path of travel of said flat bar and said second die being disposed with the axis of said cylindrical metal core at an angle to said path of travel substantially equal to the helical angle of the helical element
Claim 2
Independent Claim
134 words
A device for manufacturing a helical element comprising a group of rolls and a first die, said group of rolls and first die being adapted to feed forward a flat bar and to form said bar successively into a flat bar of completely arcuate section, and a second die for forming said arcuate flat bar into a helix, said second die comprising an outer metal cylinder and an inner cylindrical metal core, said metal core being provided on its outer surface with a helical groove of arcuate section, said first die being disposed along the path of travel of said flat bar and said second die being disposed with the axis of said cylindrical metal core at an angle to said path of travel substantially equal to the helical angle of the helical element
Claim 3
Dependent Claim
43 words
A device for manufacturing a helical element according to claim 1 wherein the group of rolls are rolls for feeding a flat bar and the first die is a die for forming the flat bar into a flat bar of completely arcuate section.
Claim 4
Dependent Claim
36 words
A device for manufacturing a helical element according to claim 2 wherein the group of rolls for feeding a flat bar is made up of a group of pairs of upper and lower flat grooved rolls.
Claim 5
Dependent Claim
73 words
A device for manufacturing a helical element according to claim 2 wherein the first die is provided with a forming opening, said opening being progressively sharper in arcuate angle along the length extending over the outlet side end of the first die and having a completely arcuate section equal to the curvature of the outer circumference of a linear body to be wrapped by the helically preformed element at said outlet side end.
Claim 6
Dependent Claim
55 words
A device for manufacturing a helical element according to claim 1 wherein the group of rolls is a group of rolls for feeding a flat bar and rolls for forming the bar into a bar of completely arcuate section and the first die is a die for guiding the flat bar of completely arcuate section.
Claim 7
Dependent Claim
92 words
A device for manufacturing a helical element according to claim 5 wherein the group of rolls for feeding a flat bar and rolls for forming the bar into a bar of completely arcuate section is made up in the manner that first rolls are feed rolls for a flat bar comprising a pair of upper and lower flat grooved rolls and second rolls and those disposed thereafter are a group of pairs of upper and lower arcuately grooved rolls for successively forming a flat bar into a bar of completely arcuate section.
Claim 8
Dependent Claim
37 words
A device for manufacturing a helical element according to claim 5 wherein the first die is provided at the inlet and outlet side ends for a flat bar with an opening of uniformly and completely arcuate section.
Claim 9
Dependent Claim
58 words
A device for manufacturing a helical element according to claim 1 wherein the group of rolls is a group of grooved rolls for feeding and forming a flat bar into a bar of arcuate section to a certain degree and the first die is a die for forming the flat bar into a bar of completely arcuate section.
Claim 10
Dependent Claim
92 words
A device for manufactUring a helical element according to claim 8 wherein the group of rolls for feeding and forming a flat bar into a bar of arcuate section to a certain degree is made up in the manner that first rolls are feed rolls for a flat bar comprising a pair of upper and lower flat rolls and second rolls and rolls disposed thereafter are a group of pairs of upper lower arcuately grooved rolls for successively forming a flat bar into a bar of arcuate section to a certain degree.
Claim 11
Dependent Claim
66 words
A device for manufacturing a helical element according to claim 8 wherein the first die is provided with a forming opening, said opening being arcuate in section in a certain degree at the inlet side end for a flat bar and being progressively sharper in arcuate angle along the length extending over the outlet side end and having completely arcuate section at said outlet side end.
Claim 12
Dependent Claim
69 words
A device for manufacturing a helical element according to claim 6 wherein the pair of upper and lower forming rolls for successively forming a flat bar into a bar of arcuate section are made up in the manner that one roll to be used as a female roll is a flat roll made of elastic material and the other male roll is a grooved roll made of rigid material.
Claim 13
Dependent Claim
70 words
A device for manufacturing a helical element according to claim 9 wherein the pair of upper and lower forming rolls for successively forming a flat bar into a bar of arcuate section are made up in the manner that one roll to be used as a female roll is a flat roll made of elastic material and the other male roll is an arcuately grooved roll made of rigid material.
Claim 14
Dependent Claim
33 words
A device for manufacturing a helical element according to claim 1 wherein the second die is disposed at an angle to the path of travel in the range of 20* to 30* .
References Cited (Backward Citations)
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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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |