US3801369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removal of lithography from containers
Assignee: Individual
•
Filing: 1972-10-31
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Granted: 1974-04-02
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Expires: 1992-10-31
Abstract
Abstract The applied finish or lithography of cylindrical containers such as aerosol type containers is removed by passing the container through a zone of intense heat and then immediately into a second zone where the cylindrical surface of the container is brushed while hot and while the lithography is soft. A plurality of containers are preferably urged seriatim along a linear path through an induction heating coil and are then engaged by one or more wire brushes which rotate the container during the brushing operation. The process may be carried out rapidly and automatically without damage to the soldered seam or metallurgy of the container.
Inventors
- 👤 J Gregory
- 👤 J Randolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:16
CPC Classifications
C; C23; C23G; C23G3/00; B; B08; B08B; B08B1/00; B08B1/30; B08B1/32; B08B1/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
The method of claim 1 wherein the containers are heated by conveying them through an energized electrical induction coil.
Claim 2
Dependent Claim
20 words
The method of claim 2 wherein the containers are passed in a spaced relationship through a continuously energized induction coil.
Claim 3
Dependent Claim
25 words
The method of claim 2 wherein the containers are jogged through an induction coil and the coil is momentarily energized in sequence with each jog.
Claim 4
Dependent Claim
36 words
The method of claim 4 wherein the containers are jogged in a contiguous end to end relationship and the coil is arranged to effect more heating at the ends of the container than in the middle.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the containers are heated by passage through a heated oven.
Claim 6
Dependent Claim
45 words
The method of claim 1 wherein the step of brushing comprises supporting the container on one portion of its cylindrical surface, and engaging another portion of the cylindrical surface with a rotating brush with sufficient force to cause the container to rotate about its axis.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the containers are heated to a temperature of from about 340* to about 450*F.
Claim 8
Independent Claim
49 words
A method of removing lithography from the cylindrical outer surface of an aerosol can in the absence of solvent contact comprising the steps of first heating the cylindrical surface to a temperature sufficient to substantially soften the lithography thereon, and then brushing said cylindrical surface to remove said lithography.
Claim 9
Independent Claim
80 words
A method of removing lithography from the cylindrical outer surface of a container in the absence of solvent contact comprising the steps of supporting the container with its axis substantially horizontal, heating the container to a temperature of from about 340* to about 450*F, and then immediately brushing the heated cylindrical surface along an upwardly facing area thereof by a brush rotating on an axis substantially parallel to said substantially horizontal axis while the container rotates on a horozontal axis.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |