US3736896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating end portions from metal cans
Assignee: Park Ohio Holdings Corp
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Filing: 1972-05-23
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Granted: 1973-06-05
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Expires: 1992-05-23
Abstract
Abstract A method and apparatus for separating the end portions, or lids from a metal can including a cylindrical steel body portion and aluminum end portions wherein the aluminum end portions are melted adjacent the periphery of the body portion to allow separation from the can.
Inventors
- 👤 H Osborn
- 👤 J Maxim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
H; H05; H05B; H05B6/00; B; B67; B67B; B67B7/00; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/304; Y10T29/00; Y10T29/49; Y10T29/49815; Y10T29/49819
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
A method of separating the end portion from a metal can including a cylindrical body portion formed from a first metal having a first melting temperature, said cylindrical body having axially spaced ends, and an end portion formed from a second metal having a second melting temperature different from said first melting temperature, said end portion being secured to one of said ends by a joint extending around the periphery of said cylindrical portion, said method comprising the steps of: a. heating said can completely around said periphery and adjacent said joint to a temperature substantially greater than one of said melting temperatures; and, b. then separating said end portion from said cylindrical portion.
Claim 2
Independent Claim
114 words
A method of separating the end portion from a metal can including a cylindrical body portion formed from a first metal having a first melting temperature, said cylindrical body having axially spaced ends, and an end portion formed from a second metal having a second melting temperature different from said first melting temperature, said end portion being secured to one of said ends by a joint extending around the periphery of said cylindrical portion, said method comprising the steps of: a. heating said can completely around said periphery and adjacent said joint to a temperature substantially greater than one of said melting temperatures; and, b. then separating said end portion from said cylindrical portion.
Claim 3
Dependent Claim
24 words
The method as defined in claim 1 wherein said heating step includes inductively heating said can completely around said periphery and adjacent said joint.
Claim 4
Dependent Claim
19 words
The method as defined in claim 1 wherein said second melting temperature is less than said first melting temperature.
Claim 5
Dependent Claim
22 words
The method as defined in claim 1 wherein said heating temperature is at least 50*F greater than one of said melting temperatures.
Claim 6
Dependent Claim
17 words
The method as defined in claim 4 wherein said one melting temperature is said second melting temperature.
Claim 7
Dependent Claim
21 words
The method as defined in claim 5 wherein said first melting temperature exceeds said second melting temperature by more than 50*F.
Claim 8
Dependent Claim
19 words
The method as defined in claim 6 wherein said first metal is steel and said second metal is aluminum.
Claim 9
Dependent Claim
24 words
The method as defined in claim 7 wherein said heating step includes inductively heating said can completely around said periphery and adjacent said joint.
Claim 10
Independent Claim
139 words
An apparatus for separating the end portion from a metal can including a cylindrical body portion formed from a first metal having a first melting temperature, said cylindrical body having axially spaced ends, and An end portion formed from a second metal having a second melting temperature different from said first melting temperature, said end portion being secured to one of said ends by a joint extending around the periphery of said cylindrical portion,said apparatus comprising: a. means for supporting said can; b. an inductor adjacent said joint and coextensive with said periphery; c. a high frequency power supply means connected to said inductor for energizing said inductor with a current sufficient to heat said can to a temperature substantially greater than one of said melting temperatures; and, d. means for separating said end portion from said cylindrical portion.
Claim 11
Independent Claim
139 words
An apparatus for separating the end portion from a metal can including a cylindrical body portion formed from a first metal having a first melting temperature, said cylindrical body having axially spaced ends, and An end portion formed from a second metal having a second melting temperature different from said first melting temperature, said end portion being secured to one of said ends by a joint extending around the periphery of said cylindrical portion,said apparatus comprising: a. means for supporting said can; b. an inductor adjacent said joint and coextensive with said periphery; c. a high frequency power supply means connected to said inductor for energizing said inductor with a current sufficient to heat said can to a temperature substantially greater than one of said melting temperatures; and, d. means for separating said end portion from said cylindrical portion.
Claim 12
Independent Claim
119 words
A method of separating the end portion from a metal can including a cylindrical body portion formed from a first metal having a first melting temperature, said cylindrical body having axially spaced ends, and an end portion formed from a second metal having a second melting temperature different from said first melting temperature, said end portion being secured to one of said ends by a joint extending around the periphery of said cylindrical portion, said method includes the steps of: a. melting at least one of said metals in a narrow band forming a closed shape coextensive with said periphery and adjacent said joint; and, b. then separating said end portion from said cylindrical portion at said narrow band.
Claim 13
Independent Claim
119 words
A method of separating the end portion from a metal can including a cylindrical body portion formed from a first metal having a first melting temperature, said cylindrical body having axially spaced ends, and an end portion formed from a second metal having a second melting temperature different from said first melting temperature, said end portion being secured to one of said ends by a joint extending around the periphery of said cylindrical portion, said method includes the steps of: a. melting at least one of said metals in a narrow band forming a closed shape coextensive with said periphery and adjacent said joint; and, b. then separating said end portion from said cylindrical portion at said narrow band.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |