US3971115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making roller
Assignee: Agfa Gevaert AG
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Filing: 1974-02-28
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Granted: 1976-07-27
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Expires: 1994-02-28
Abstract
Abstract A roller to be used in apparatus for wet treatment of photographic material comprises a hollow metallic core and two inserts with coupling shafts provided therein. A coat of chemically resistant thermoplastic material is applied around and sealingly surrounds the core to protect it from the corrosive action of media used in the wet treatment process. The outer surface of the thus coated roller is thereupon machined to a high-quality finish.
Inventors
- 👤 Siegfried Schneider
- 👤 Kurt Thate
- 👤 Erwin Geyken
- 👤 Horst Kempe
- 👤 Stephan Macher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/08; G03D3/13; B; B29; B29D; B29D99/00; B29D99/0032; B29D99/0035; F; F16; F16C; F16C13/00; B29L; B29L2031/00; B29L2031/32; B29L2031/324; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/4956; Y10T29/49563; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
80 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; confining the core and the inserts in the cavity of an injection mold; and injection-molding a chemically resistant coat about the exposed surfaces of the core and of the inserts, said coat bonding with said inserts, sealing the interior of the core and securing said inserts to the latter.
Claim 2
Independent Claim
80 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; confining the core and the inserts in the cavity of an injection mold; and injection-molding a chemically resistant coat about the exposed surfaces of the core and of the inserts, said coat bonding with said inserts, sealing the interior of the core and securing said inserts to the latter.
Claim 3
Dependent Claim
25 words
A method as defined in claim 1 further comprising the step of machining the external cylindrical surface of said coat subsequently to said applying step.
Claim 4
Independent Claim
61 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and chemically smoothing the cylindrical surface of said coat by applying a solvent thereto.
Claim 5
Independent Claim
61 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and chemically smoothing the cylindrical surface of said coat by applying a solvent thereto.
Claim 6
Independent Claim
56 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and thermally smoothing the cylindrical surface of said coat.
Claim 7
Independent Claim
56 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and thermally smoothing the cylindrical surface of said coat.
Claim 8
Independent Claim
67 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and thermally smoothing the cylindrical surface of said coat by directing a stream of heated gaseous medium against said surface.
Claim 9
Independent Claim
67 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and thermally smoothing the cylindrical surface of said coat by directing a stream of heated gaseous medium against said surface.
Claim 10
Independent Claim
59 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and thermally smoothing the cylindrical surface of said coat by radiated heat.
Claim 11
Independent Claim
59 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and thermally smoothing the cylindrical surface of said coat by radiated heat.
Claim 12
Independent Claim
67 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and introducing coupling means into said inserts so as to establish a permanent bond between the former and the latter.
Claim 13
Independent Claim
67 words
A method of producing chemically resistant rollers of the type having a tubular metallic core, comprising the steps of introducing portions of two inserts into the ends of a tubular core; applying a chemically resistant coat to the exposed surfaces of the core and of the inserts; and introducing coupling means into said inserts so as to establish a permanent bond between the former and the latter.
Claim 14
Dependent Claim
35 words
A method as defined in claim 7, wherein each of said coupling means is a shaft and each insert is provided with radially extending ribs, said introducing step comprising inserting said shafts between said ribs.
Claim 15
Dependent Claim
22 words
A method as defined in claim 8, wherein the voids between said ribs are filled with thermoplastic material during said applying step.
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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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |