US3753517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide roll for filaments
Assignee: Teijin Ltd
•
Filing: 1972-09-15
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Granted: 1973-08-21
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Expires: 1992-09-15
Abstract
Abstract This invention provides a guide roll for filaments as used in apparatuses in which the draw-twisting, draw-winding, false twisting or heat treatment of the synthetic filaments and the like are carried out, and this guide roll is particularly devised to meet the requirements of high speed operation. Again, it can be used under conditions of elevated temperature and high humidity. Heretofore, radial ball bearings have been used in the guide rolls of low speed rotation, but to meet the demands for an increase in the production in recent years guide rolls equipped with fluid bearings are now being used in view of their low torque and ability to endure its high speed operation. This invention concerns a guide roll equipped with this type of fluid bearing and is one whose performance has been enhanced by specifying as to its basic factors, with a mathematical formula, as a result of detailed observations and repeated experimentation, the numerical values involved in its designing, and also through elaborate works in the detailed parts of the fluid bearing, by eliminating the points which might become causes for trouble. Thus, the guide roll according to the present invention not only meets the conditions for high speed operation but also can maintain its high performance.
Inventors
- 👤 Y Takenaka
- 👤 H Aoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:52
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0681; F16C32/0696; B; B65; B65H; B65H51/00; B65H51/02; B65H51/04; B65H51/06; B65H57/00; B65H57/14; F16C13/00; F16C13/02; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
226 words
A guide roll for filaments comprising a roll body fitted rotatably about a shaft, said shaft being provided with orifices through which pressurized air is introduced to form between said roll body and said shaft an air film to thereby provide a bearing means by which the roll body is supported, characterized in that the various values involved in the design of said bearing means, are chosen such as to satisfy the following relationship: 2 < log n.d.L/Ps.C2.D < 4.5 wherein n is the total number of orifices for the introduction of the pressurized air, with the limitation that n > OR = 6, d is the diameter in millimeters of the orifices for introducing the pressurized air, Ps is the pressure in kilograms per square centimeter absolute at which the pressurized air is fed, with the limitation that Ps > OR = 3, C is the clearance in millimeters between the roll body and the shaft in the radial direction, with the limitation that C > 10 X 10 3, D is the outside diameter in millimeters of the shaft, and L is the sum of the distances in millimeters from the several orifices to the pressurized air discharge outlet measured in the axial direction, provided that when there is no pressurized air outlet between adjacent orifices, the distance between said orifices is not included.
Claim 2
Dependent Claim
226 words
A guide roll for filaments comprising a roll body fitted rotatably about a shaft, said shaft being provided with orifices through which pressurized air is introduced to form between said roll body and said shaft an air film to thereby provide a bearing means by which the roll body is supported, characterized in that the various values involved in the design of said bearing means, are chosen such as to satisfy the following relationship: 2 < log n.d.L/Ps.C2.D < 4.5 wherein n is the total number of orifices for the introduction of the pressurized air, with the limitation that n > OR = 6, d is the diameter in millimeters of the orifices for introducing the pressurized air, Ps is the pressure in kilograms per square centimeter absolute at which the pressurized air is fed, with the limitation that Ps > OR = 3, C is the clearance in millimeters between the roll body and the shaft in the radial direction, with the limitation that C > 10 X 10 3, D is the outside diameter in millimeters of the shaft, and L is the sum of the distances in millimeters from the several orifices to the pressurized air discharge outlet measured in the axial direction, provided that when there is no pressurized air outlet between adjacent orifices, the distance between said orifices is not included.
Claim 3
Dependent Claim
51 words
In a guide roll according to claim 1, the provisions of one or more holes 11 disposed in said shaft 2 axially thereof, said holes communicating with recessed portion 10 provided inside said shaft 2 at points intermediately of said orifices 6, as well as with the outside of said shaft.
Claim 4
Dependent Claim
53 words
In a guide roll according to claim 1, the provisions of flanges 3 and 7 at the ends of said shaft 2, at least one of which flanges being provided with a sleeve 14 extending in the axial direction in such a manner as to envelop the end of the roll body 1.
Claim 5
Dependent Claim
64 words
In a guide roll according to claim 1, the provisions of flanges 3 and 7 at the ends of said shaft 2, said flanges being provided with a plurality of fluid discharge orifices 12 at positions on the extension line from the clearance 8, the effective discharge area of said discharge orifices 12 being 50 -200 percent of the area of said orifices 6.
Claim 6
Dependent Claim
97 words
In a guide roll according to claim 1, the provisions of one or more holes 11 disposed in said shaft 2 axially thereof, said holes communicating with recessed portions 10 provided inside said shaft 2 at points intermediately of said orifices 6, as well as with the outside of said shaft, and moreover the provisions of flanges 3 and 7 at the ends of said shaft 2, at least one of said flanges being provided with a sleeve 14 extending in the axial direction in such a manner as to envelop the end of the roll body
Claim 7
Dependent Claim
109 words
In a guide roll according to claim 1, the provisions of one or more holes 11 disposed in said shaft 2 axially thereof, said holes communicating with recessed portions 10 provided inside said shaft 2 at points intermediately of said orifices 6, as well as with the outside of said shaft, and moreover the provisions of flanges 3 and 7 at the ends of said shaft 2, said flanges being provided with a plurality of fluid discharge orifices 12 at positions on the extension line from the clearance 8, the effective discharge area of said discharge orifices 12 being 50 -200 percent of the area of said orifices 6.
Claim 8
Dependent Claim
100 words
In a guide roll according to claim 1, the provisions of flanges 3 and 7 at the ends of said shaft 2, at least one of said flanges being provided with a sleeve 14 extending in the axial direction in such a manner as to envelop the end of the roll body 1, said flanges 3 and 7 being further provided with a plurality of fluid discharge orifices 12 at positions on the extension line from the clearance 8, the effective discharge area of said discharge orifices 12 being 50 - 200 percent of the area of said orifices 6.
Claim 9
Dependent Claim
142 words
In a guide roll according to claim 1, the provisions of one or more holes 11 disposed in said shaft 2 axially thereof, said holes communicating with recessed portions 10 provided inside said shaft 2 at points intermediately of said orifices 6, as well as with the outside of said shaft, and moreover the provisions of flanges 3 and 7 at the ends of said shaft 2, at least one of said flanges being provided with a sleeve 14 extending in the axial direction in such a manner as to envelop the end of the roll body 1, said flanges being further provided with a plurality of fluid discharge orifices 12 at positions on the extension line from the clearance 8, the effective discharge area of said discharge orifices 12 being 50 - 200 percent of the area of said orifices 6.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |