US4693756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and retort for the removal of carbonizable coatings from the surfaces of metal objects
Assignee: Schlick Roto-Jet Maschinenbau GmbH
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Filing: 1985-06-26
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Granted: 1987-09-15
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Expires: 2005-06-26
Abstract
Abstract A method for the removal of carbonizable, adherent coatings from the surfaces of metal parts, in which the metal parts are baked or pyrolyzed in the course of the method. The metal parts are brought to the carbonizing temperature in a substantially closed retort. Without leaving the retort, the adherent, carbonized coating is blasted off by means of heated blasting medium as the carbonization proceeds or after it ends. The heating of the metal parts is performed in a fluidized bed within the retort. The medium of the fluidized bed is simultaneously the blasting medium.
Inventors
- 👤 Horst D. Schlick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:54
CPC Classifications
B; B24; B24C; B24C1/00; B24C1/08; B24C1/083; B05; B05D; B05D3/00; B08; B08B; B08B7/00; B08B7/0064; B08B7/0071; B24C3/00; B24C3/02; B24C3/04; B44; B44D; B44D3/00; B44D3/16; B44D3/166; B05D1/00; B05D1/02; B05D1/12; B05D1/18; B05D1/22; B05D1/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A method for the removal of carbonizable, adherent coatings from the surfaces of metal objects, in which the coatings on the metal objects are carbonized or pyrolyzed in the course of the method, comprising: bringing one or more metal objects having one or more carbonizable, adherent coatings on one or more surfaces thereof in a substantially closed retort to the carbonizing temperature; and, heating a blasting medium at least to a temperature so high that the temperature within the retort does not diminish below the temperature required for carbonizing within the retort; without the one or more metal objects leaving the retort, utilizing the heated blasting medium to blast off the one or more adherent, carbonized coatings at least after the beginning of the carbonization.
Claim 2
Independent Claim
125 words
A method for the removal of carbonizable, adherent coatings from the surfaces of metal objects, in which the coatings on the metal objects are carbonized or pyrolyzed in the course of the method, comprising: bringing one or more metal objects having one or more carbonizable, adherent coatings on one or more surfaces thereof in a substantially closed retort to the carbonizing temperature; and, heating a blasting medium at least to a temperature so high that the temperature within the retort does not diminish below the temperature required for carbonizing within the retort; without the one or more metal objects leaving the retort, utilizing the heated blasting medium to blast off the one or more adherent, carbonized coatings at least after the beginning of the carbonization.
Claim 3
Dependent Claim
19 words
A method in accordance with claim 1, which includes heating the blasting medium at least to the carbonizing temperature.
Claim 4
Dependent Claim
37 words
A method in accordance with claim 1, which includes carrying blasting medium out of the retort for cleaning and heating; and sorting, heating, and returning blasting medium in closed circuit to the blasting medium in the retort.
Claim 5
Dependent Claim
20 words
A method in accordance with claim 1, which includes heating the metal objects within the retort in a fluidized bed.
Claim 6
Dependent Claim
21 words
A method in accordance with claim 4, which includes utilizing the blasting medium as a bedding medium of the fluidized bed.
Claim 7
Dependent Claim
33 words
A method in accordance with claim 1, for the removal of lacquer coatings, which includes heating the blasting medium and the atmosphere of the retort to a temperature between 400° and 460° C.
Claim 8
Dependent Claim
42 words
A method in accordance with claim 1, in which the metal objects are conductor cables to be stripped, in which the step of utilizing a heated blasting medium includes utilizing a heated blasting medium of the same metal as the metal cable.
Claim 9
Dependent Claim
37 words
A method in accordance with claim 1, in which the step of utilizing a heated blasting medium includes utilizing a heated blasting medium to blast off the one or more adherent, carbonized coatings as the carbonization progresses.
Claim 10
Dependent Claim
37 words
A method in accordance with claim 1, in which the step of utilizing a heated blasting medium includes utilizing a heated blasting medium to blast off the one or more adherent, carbonized coatings after the carbonization ends.
References Cited (Backward Citations)
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Cited
US2978378A
Cited
US3824739A
Cited
US3945155A
Cited
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Cited
US4297147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-14 | 1991-03-16 | 1991-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-14 | 1995-03-16 | 1995-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-14 | 1999-03-16 | 1999-09-15 | $7700.00 | Window Closed / Lapsed |