US4794680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel wear-resistant laser-engraved ceramic or metallic carbide surfaces for friction rolls for working elongate members, method for producing same and method for working elongate members using the novel friction roll
Assignee: Praxair ST Technology Inc
•
Filing: 1985-12-20
•
Granted: 1989-01-03
•
Expires: 2005-12-20
Abstract
Abstract The invention is to friction rolls for working elongate members, e.g., webs or strands, such as crimper rolls, draw rolls, yarn package drive rolls comprising a roll having a generally cylindrical external surface and a ceramic, e.g., alumina, mixtures of alumina and titania, chromia, zirconia, or metallic carbide, e.g., tungsten carbide, coating bonded to the external surface, the coating being laser-engraved, that is, having a plurality of laser-formed depressions having a pattern covering substantially the entire exterior working surface of the roll and providing a uniform, wear-resistant surface texture over substantially the entire working surface.
Inventors
- 👤 Robert W. Meyerhoff
- 👤 Richard C. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:58
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; B; B21; B21B; B21B27/00; B21B27/005; B23; B23K; B23K26/00; B23K26/08; B23K26/0823; B41; B41N; B41N7/00; B65; B65H; B65H27/00; B65H54/00; B65H54/02; B65H54/40; B65H54/46; B65H57/00; B65H57/24; C; C23; C23C; C23C26/00; C23C26/02; B41N2207/00; B41N2207/02; B41N2207/10; B65H2404/00; B65H2404/10; B65H2404/18; B65H2404/181; B65H2404/50; B65H2404/52; B65H2404/521; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
116 words
A friction roll for performing work on an elongate solid material by frictional contact therewith comprising a roll having an external surface defining a working surface and a ceramic or metallic carbide coating bonded to said working surface, said coating having a plurality of laser-formed depressions having a pattern providing a substantially uniform, wear-resistant recast surface to said working surface, said recast surface providing a different morphological structure than the coating and providing a consistent coefficient of friction over a roughness range from about 20 to 1000 Ra, said coefficient of friction measured with a Shirley frictometer using a 150 denier nylon yarn at 10 grams tension and a surface speed of 260 yards per minute.
Claim 2
Dependent Claim
116 words
A friction roll for performing work on an elongate solid material by frictional contact therewith comprising a roll having an external surface defining a working surface and a ceramic or metallic carbide coating bonded to said working surface, said coating having a plurality of laser-formed depressions having a pattern providing a substantially uniform, wear-resistant recast surface to said working surface, said recast surface providing a different morphological structure than the coating and providing a consistent coefficient of friction over a roughness range from about 20 to 1000 Ra, said coefficient of friction measured with a Shirley frictometer using a 150 denier nylon yarn at 10 grams tension and a surface speed of 260 yards per minute.
Claim 3
Dependent Claim
17 words
A friction roll as claimed in claim 1 wherein said ceramic or metallic carbide coating is alumina.
Claim 4
Dependent Claim
22 words
A friction roll as claimed in claim 1 wherein said ceramic or metallic carbide coating is a mixture of alumina and titania.
Claim 5
Dependent Claim
17 words
A friction roll as claimed in claim 1 wherein said ceramic or metallic carbide coating is chromia.
Claim 6
Dependent Claim
22 words
A friction roll as claimed in claim 1 wherein said ceramic or metallic carbide coating is a mixture of chromia and alumina.
Claim 7
Dependent Claim
16 words
A friction roll as claimed in claim 1 wherein said friction roll is a crimper roll.
Claim 8
Dependent Claim
16 words
A friction roll as claimed in claim 1 wherein said friction roll is a draw roll.
Claim 9
Dependent Claim
18 words
A friction roll as claimed in claim 1 wherein said friction roll is a yarn package drive roll.
Claim 10
Dependent Claim
16 words
A friction roll as claimed in claim 1 wherein said friction roll is a friction pin.
Claim 11
Dependent Claim
16 words
A friction roll as claimed in claim 1 wherein said friction roll is a guide pin.
Claim 12
Dependent Claim
18 words
A friction roll as claimed in claim 1 wherein said ceramic or metallic carbide coating is tungsten carbide.
Claim 13
Dependent Claim
21 words
A friction roll as claimed in claim 1 wherein said ceramic or metallic carbide coating contains tungsten carbide, cobalt and chromium.
Claim 14
Dependent Claim
138 words
Method of forming a friction roll for performing work on an elongate solid material by frictional contact with said elongate solid material, said roll having an external surface defining a working surface comprising the steps of bonding a ceramic or metallic carbide coating to said working surface and laser-engraving the coating on said working surface with a plurality of depressions having a pattern covering substantially the entire said working surface and said laser-engraving step providing a uniform, wear-resistant surface texture of recast coating formed by said laser-engraving step over substantially the entire said working surface, said recast surface providing a different morphological structure than the coating and providing a consistent coefficient of friction as measured with a Shirley frictometer using a 150 denier nylon yarn at 10 grams tension and a surface speed of 260 yards per minute.
Claim 15
Dependent Claim
138 words
Method of forming a friction roll for performing work on an elongate solid material by frictional contact with said elongate solid material, said roll having an external surface defining a working surface comprising the steps of bonding a ceramic or metallic carbide coating to said working surface and laser-engraving the coating on said working surface with a plurality of depressions having a pattern covering substantially the entire said working surface and said laser-engraving step providing a uniform, wear-resistant surface texture of recast coating formed by said laser-engraving step over substantially the entire said working surface, said recast surface providing a different morphological structure than the coating and providing a consistent coefficient of friction as measured with a Shirley frictometer using a 150 denier nylon yarn at 10 grams tension and a surface speed of 260 yards per minute.
Claim 16
Dependent Claim
27 words
Method as claimed in claim 13 wherein said laser-engraved coating is subjected to brushing with an aqueous slurry of a finely divided abrasive after the laser-engraving step.
Claim 17
Dependent Claim
15 words
Method as claimed in claim 13 wherein said ceramic or metallic carbide coating is alumina.
Claim 18
Dependent Claim
20 words
Method as claimed in claim 13 wherein said ceramic or metallic coating is a mixture of alumina and titanium dioxide.
Claim 19
Dependent Claim
15 words
Method as claimed in claim 13 wherein said ceramic or metallic carbide coating is chromia.
Claim 20
Dependent Claim
20 words
Method as claimed in claim 13 wherein said ceramic or metallic carbide coating is a mixture of chromia and alumina.
Claim 21
Dependent Claim
16 words
Method as claimed in claim 13 wherein said ceramic or metallic carbide coating is tungsten carbide.
Claim 22
Dependent Claim
21 words
Method as claimed in claim 13 wherein said ceramic or metallic coating is a mixture of tungsten carbide, cobalt and chromium.
Claim 23
Dependent Claim
28 words
Method as claimed in claim 13 wherein said ceramic or metallic carbide coating is sealed with a pore sealant after said bonding step and before said laser-engraving step.
Claim 24
Dependent Claim
26 words
Method as claimed in claim 13 wherein the resulting sealed ceramic or metallic carbide coating is ground after the sealing step and before the laser-engraving step.
Claim 25
Independent Claim
113 words
A device for performing work on an elongate solid material by frictional contact, the device including friction roll having a working surface, the device comprising, a ceramic or metallic carbide coating bonded to said working surface, said coating having a plurality of laser-formed depressions having a pattern providing a substantially uniform, wear-resistant recast surface to said working surface, said recast surface providing a different morphological structure than the coating and providing a consistent coefficient of friction over a roughness range from 20 to 1000 Ra, said coefficient of friction measured with a Shirley frictometer using a 150 denier nylon yarn at 10 grams tension and a surface speed of 260 yards per minute.
Claim 26
Independent Claim
113 words
A device for performing work on an elongate solid material by frictional contact, the device including friction roll having a working surface, the device comprising, a ceramic or metallic carbide coating bonded to said working surface, said coating having a plurality of laser-formed depressions having a pattern providing a substantially uniform, wear-resistant recast surface to said working surface, said recast surface providing a different morphological structure than the coating and providing a consistent coefficient of friction over a roughness range from 20 to 1000 Ra, said coefficient of friction measured with a Shirley frictometer using a 150 denier nylon yarn at 10 grams tension and a surface speed of 260 yards per minute.
Claim 27
Dependent Claim
22 words
The device as claimed in claim 23 wherein said friction roll is a crimping roll and said elongate solid material is tow.
Claim 28
Dependent Claim
17 words
A device as claimed in claim 23 wherein said ceramic or metallic carbide coating is tungsten carbide.
Claim 29
Dependent Claim
20 words
A device as claimed in claim 23 wherein said ceramic or metallic carbide coating contains tungsten carbide, cobalt and chromium.
References Cited (Backward Citations)
US2373876A
Cited
US2386583A
Cited
US2393953A
Cited
US2450409A
Cited
US2450410A
Cited
US2863175A
Cited
US3588489A
Cited
US3654864A
Cited
GB1407079A
Cited
US3902234A
Cited
CA1009507A
Cited
US3924093A
Cited
US4009658A
Cited
US3924313A
Cited
US4015221A
Cited
US4032743A
Cited
US4087672A
Cited
US4131782A
Cited
US4057350A
Cited
US4128752A
Cited
GB1585143A
Cited
US4173685A
Cited
US4200382A
Cited
US4322600A
Cited
US4352973A
Cited
US4347785A
Cited
GB2049102A
Cited
US4248369A
Cited
US4288889A
Cited
US4391879A
Cited
DE3139646A1
Cited
US4489461A
Cited
US4417369A
Cited
US4524785A
Cited
DE3220534A1
Cited
US4504354A
Cited
JPS5945088A
Cited
JPS5947086A
Cited
US4547936A
Cited
US4519840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |