US3942937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing durable, slick sliding surfaces on extrusion forming apparatus, and the product thereof
Assignee: Vulkor Inc
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Filing: 1974-05-16
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Granted: 1976-03-09
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Expires: 1994-05-16
Abstract
Abstract The provision of a durable, slick sliding surface on metal faces of plastic forming extrusion apparatus such as extruder nozzles and dies. The durable, slick sliding metal surface is provided by burnishing and heat treating a polysiloxane fluid on the face of the metal. The burnishing comprises vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated, effectively over the entire surface treated.
Inventors
- 👤 Maurice Prober
- 👤 Joseph Edward Vostovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:46
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/03; B29C48/06; B29C48/30; B29C48/32; B29C48/34; B29C48/05; Y; Y10; Y10T; Y10T29/00; Y10T29/46
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
82 words
A method of treating a metal face of an extrusion forming apparatus to provide thereon a durable, slick sliding surface, comprising applying polysiloxane fluid to the metal face, burnishing the metal face having the siloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated, effectively over the entire surface treated, and heating the burnished metal face with the siloxane thereon to a temperature of at least about 150°C.
Claim 2
Independent Claim
82 words
A method of treating a metal face of an extrusion forming apparatus to provide thereon a durable, slick sliding surface, comprising applying polysiloxane fluid to the metal face, burnishing the metal face having the siloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated, effectively over the entire surface treated, and heating the burnished metal face with the siloxane thereon to a temperature of at least about 150°C.
Claim 3
Dependent Claim
25 words
The method of claim 1, wherein the polysiloxane fluid is a dimethyl polysiloxane of a viscosity within the approximate range of 50 to 1000 centistokes.
Claim 4
Dependent Claim
24 words
The method of claim 2, wherein the burnished metal face with the polysiloxane thereon is heated to a temperature of about 200°C to 300°C.
Claim 5
Dependent Claim
13 words
The method of claim 1, wherein the polysiloxane is a dimethyl diphenyl polysiloxane.
Claim 6
Independent Claim
98 words
A method of treating a metal face of an extrusion forming apparatus to provide thereon a durable, slick sliding surface, comprising applying polysiloxane fluid having a viscosity of from about 50 to about 1000 centistokes to a metal face of an extrusion forming apparatus, burnishing the metal face having the polysiloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated effectively over the entire surface treated, and heating the burnished metal face with the polysiloxane thereon to a temperature of about 200°C to 300°C.
Claim 7
Independent Claim
98 words
A method of treating a metal face of an extrusion forming apparatus to provide thereon a durable, slick sliding surface, comprising applying polysiloxane fluid having a viscosity of from about 50 to about 1000 centistokes to a metal face of an extrusion forming apparatus, burnishing the metal face having the polysiloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated effectively over the entire surface treated, and heating the burnished metal face with the polysiloxane thereon to a temperature of about 200°C to 300°C.
Claim 8
Dependent Claim
14 words
The method of claim 5, wherein the polysiloxane fluid is a dimethyl diphenyl siloxane.
Claim 9
Dependent Claim
22 words
The method of claim 5, wherein the polysiloxane fluid is dimethyl polysiloxane having a viscosity of about 100 to about 350 centistokes.
Claim 10
Dependent Claim
23 words
The method of claim 5, wherein the burnished metal face with the polysiloxane fluid thereon is heated to a temperature of approximately 250°C.
Claim 11
Dependent Claim
87 words
An extrusion forming apparatus having a metal face thereof provided with a durable, slick sliding surface comprising the product of applying a polysiloxane fluid to the metal face of the extrusion forming apparatus, burnishing the metal face having the polysiloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated effectively over the entire surface treated, and heating the burnished metal face with the polysiloxane thereon to a temperature of at least about 150°C.
Claim 12
Dependent Claim
87 words
An extrusion forming apparatus having a metal face thereof provided with a durable, slick sliding surface comprising the product of applying a polysiloxane fluid to the metal face of the extrusion forming apparatus, burnishing the metal face having the polysiloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated effectively over the entire surface treated, and heating the burnished metal face with the polysiloxane thereon to a temperature of at least about 150°C.
Claim 13
Dependent Claim
44 words
The extrusion forming apparatus of claim 9, wherein the polysiloxane fluid is of a viscosity within the approximate range of 50 to 1000 centistokes, and the burnished metal face with dimethyl polysiloxane thereon is heated to a temperature of about 200°C to about 300°C.
Claim 14
Dependent Claim
15 words
The extrusion forming apparatus of claim 9, wherein the polysiloxane is a dimethyl diphenyl polysiloxane.
Claim 15
Dependent Claim
102 words
An extrusion forming apparatus having a metal face thereof provided with a durable, slick sliding surface comprising the product of applying a dimethyl polysiloxane fluid having a viscosity of from about 100 to about 350 centistokes to the metal face of the extrusion forming apparatus, burnishing the metal face having the dimethyl polysiloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated effectively over the entire surface treated, and heating the burnished metal face with the dimethyl polysiloxane thereon to a temperature of about 200°C to about 300°C.
Claim 16
Dependent Claim
102 words
An extrusion forming apparatus having a metal face thereof provided with a durable, slick sliding surface comprising the product of applying a dimethyl polysiloxane fluid having a viscosity of from about 100 to about 350 centistokes to the metal face of the extrusion forming apparatus, burnishing the metal face having the dimethyl polysiloxane fluid thereon by vigorous rubbing of the polysiloxane fluid treated metal face with a material relatively softer than the metal face being treated effectively over the entire surface treated, and heating the burnished metal face with the dimethyl polysiloxane thereon to a temperature of about 200°C to about 300°C.
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |