US4557559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for die forming a tubular member at a reduced drawing force
Assignee: Olin Corp
•
Filing: 1982-09-30
•
Granted: 1985-12-10
•
Expires: 2002-09-30
Abstract
Abstract A process for die forming a tubular member from a metal or metal alloy strip at a reduced drawing force is described herein. The process uses shaping of at least one edge portion of each strip prior to drawing each strip through a die. The shaping reduces the drawing force exerted on the strip material and/or any joint.
Inventors
- 👤 Joseph Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:55
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/083; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4486; G02B6/4488
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A process for forming an optical fiber communication cable, said process comprising: providing at least two metal or metal alloy strips; forming at least one joint between said strips to form a continuous length of strip material; shaping adjoining ones of said strips to bevel at least one longitudinal edge of each said strip, said shaping occurring only in an area adjacent said at least one joint; pulling said continuous strip material through a die to form a tubular member, said shaping step reducing the drawing force exerted on said at least one joint as said joined strips pass through said die; and inserting at least one optical fiber into said tubular member.
Claim 2
Dependent Claim
113 words
A process for forming an optical fiber communication cable, said process comprising: providing at least two metal or metal alloy strips; forming at least one joint between said strips to form a continuous length of strip material; shaping adjoining ones of said strips to bevel at least one longitudinal edge of each said strip, said shaping occurring only in an area adjacent said at least one joint; pulling said continuous strip material through a die to form a tubular member, said shaping step reducing the drawing force exerted on said at least one joint as said joined strips pass through said die; and inserting at least one optical fiber into said tubular member.
Claim 3
Dependent Claim
85 words
An optical fiber communication cable comprising: a drawn tubular member having improved mechanical properties formed by pulling at least two joined metal or metal alloy strips through a die; at least one longitudinal edge of each said strip being beveled only in an area where one of said strips is joined to an adjacent one of said strips to reduce the drawing force acting on said joined strips at said joint during tubular member formation; and at least one optical fiber within said tubular member.
Claim 4
Dependent Claim
85 words
An optical fiber communication cable comprising: a drawn tubular member having improved mechanical properties formed by pulling at least two joined metal or metal alloy strips through a die; at least one longitudinal edge of each said strip being beveled only in an area where one of said strips is joined to an adjacent one of said strips to reduce the drawing force acting on said joined strips at said joint during tubular member formation; and at least one optical fiber within said tubular member.
Claim 5
Dependent Claim
30 words
The process of claim 1 wherein said shaping step comprises: shaping each of said strips to have a trapezoidal cross-sectional shape in said area adjacent said at least one joint.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein: said shaping step occurs prior to said at least one joint forming step.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein: said shaping step occurs after said at least one joint forming step and before said pulling step.
Claim 8
Dependent Claim
37 words
The process of claim 1 wherein: said joint forming step comprises a plurality of joints between said strips; and said shaping step comprises shaping adjacent ones of said strips in each area adjacent one of said joints.
Claim 9
Dependent Claim
30 words
The optical fiber communication cable of claim 2 further comprising: each said strip having a trapezoidal cross-section configuration in said area where said strip is joined to said adjacent strip.
Claim 10
Dependent Claim
28 words
The optical fiber communication cable of claim 2 further comprising: said tubular member having a substantially square and tight seam formed by substantially abutting edges of said strips.
Claim 11
Dependent Claim
15 words
The cable of claim 8 further comprising: said seam being filled by a closing material.
References Cited (Backward Citations)
US647868A
Cited
US1712090A
Cited
US2730135A
Cited
US3570356A
Cited
US3590622A
Cited
JPS5021425A
Cited
US3912151A
Cited
SU619527A1
Cited
DE2637157A1
Cited
US4275294A
Cited
GB1583520A
Cited
GB1592191A
Cited
US4341440A
Cited
GB2088583A
Cited
GB2091903A
Cited
US4372792A
Cited
BE895094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |