US4246045A — Multiple member clad metal products and methods o…

Claim 1

Independent Claim 116 words

The method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating the same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded aluminum-copper composite on at least one sheet of stainless steel with the aluminum adjacent to the stainless steel, heating the stacked metals to a temperature between 300° F. to 800° F. and subjecting the stacked metals to sufficient pressure to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 2

Independent Claim 116 words

The method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating the same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded aluminum-copper composite on at least one sheet of stainless steel with the aluminum adjacent to the stainless steel, heating the stacked metals to a temperature between 300° F. to 800° F. and subjecting the stacked metals to sufficient pressure to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 3

Independent Claim 79 words

A method of making a composite metal product comprising assembling a copper sheet, at least one aluminum sheet coated with substantially pure aluminum on the surfaces to be joined and at least one stainless steel sheet with the aluminum sheet between the copper and stainless steel sheets, heating said metal sheets to a temperature between 300° F. to 800° F. and then joining the assembled heated sheets under pressure sufficient to produce a reduction of about 20 to 70%.

Claim 4

Independent Claim 79 words

A method of making a composite metal product comprising assembling a copper sheet, at least one aluminum sheet coated with substantially pure aluminum on the surfaces to be joined and at least one stainless steel sheet with the aluminum sheet between the copper and stainless steel sheets, heating said metal sheets to a temperature between 300° F. to 800° F. and then joining the assembled heated sheets under pressure sufficient to produce a reduction of about 20 to 70%.

Claim 5

Dependent Claim 65 words

The method as claimed in claim 1 or 2 wherein the sheets being joined consist of a copper sheet, a pair of aluminum alloy sheets coated with substantially pure aluminum on each surface, one of said pair of aluminum alloy sheets on each opposite surface of the copper sheet and a stainless steel sheet on at least one surface of the aluminum opposite the copper.

Claim 6

Dependent Claim 31 words

A method as claimed in claim 1 or 2 wherein the pre-bonded aluminum-copper composite and the stainless steel sheet are heated in separate furnaces and then stacked one on the other.

Claim 7

Dependent Claim 20 words

A method as claimed in claim 1 or 2 wherein the sheets are joined by passing through a rolling mill.

Claim 8

Dependent Claim 24 words

A method as claimed in claim 1 or 2 wherein the sheets are post heat-treated up to about 700° F. following the last reduction.

Claim 9

Dependent Claim 18 words

A method as claimed in claim 3 wherein the sheets are joined by passing through a rolling mill.

Claim 10

Dependent Claim 21 words

A method as claimed in claim 3 wherein the sheets are post heat-treated to about 700° F. following the last reduction.

Claim 11

Independent Claim 86 words

The method of making a composite clad metal product comprising first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel, subjecting the stacked metals to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 12

Independent Claim 86 words

The method of making a composite clad metal product comprising first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel, subjecting the stacked metals to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 13

Independent Claim 79 words

The method of making a composite product comprising cleaning a copper sheet, at least one aluminum sheet coated with substantially pure aluminum on the surfaces to be joined and at least one stainless steel sheet to be joined including mechanical cleaning of said aluminum surfaces to be joined, assembling said sheets with the aluminum sheet between the copper and stainless steel sheets and joining the assembled sheets under pressure sufficient to produce a reduction of about 20% to 70%.

Claim 14

Independent Claim 79 words

The method of making a composite product comprising cleaning a copper sheet, at least one aluminum sheet coated with substantially pure aluminum on the surfaces to be joined and at least one stainless steel sheet to be joined including mechanical cleaning of said aluminum surfaces to be joined, assembling said sheets with the aluminum sheet between the copper and stainless steel sheets and joining the assembled sheets under pressure sufficient to produce a reduction of about 20% to 70%.

Claim 15

Dependent Claim 68 words

The method as claimed in claim 9 or 10 wherein the sheets being joined consists of a copper sheet, a pair of aluminum alloy sheets coated with substantially pure aluminum on each surface, one of said pair of aluminum alloy sheets on each opposite surface of the copper sheet and a stainless steel sheet of stainless steel on at least one surface of the aluminum opposite the copper.

Claim 16

Dependent Claim 20 words

A method as claimed in claim 9 or 10 wherein the sheets are joined by passing through a rolling mill.

Claim 17

Dependent Claim 23 words

A method as claimed in claim 9 or 10 wherein the sheets are post-heat treated at about 700° F. following the last reduction.

Claim 18

Independent Claim 132 words

The method of making a composite clad metal product comprising the steps of first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to a temperature between 300° F. to 800° F., then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, post heat-treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel with the stainless steel in contact with the cleaned aluminum surface, heating the stacked metals to a temperature between 300° F. to 800° F., and subjecting the stacked metals to sufficient pressure to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 19

Independent Claim 132 words

The method of making a composite clad metal product comprising the steps of first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to a temperature between 300° F. to 800° F., then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, post heat-treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel with the stainless steel in contact with the cleaned aluminum surface, heating the stacked metals to a temperature between 300° F. to 800° F., and subjecting the stacked metals to sufficient pressure to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 20

Dependent Claim 63 words

The method as claimed in claim 14 wherein the sheets being joined consists of a copper sheet, a pair of aluminum alloy sheets coated with substantially pure aluminum on each surface, one of said pair of aluminum alloy sheets on each opposite surface of the copper sheet and a stainless steel sheet on at least one surface of the aluminum opposite the copper.

Claim 21

Dependent Claim 30 words

A method as claimed in claim 14 wherein the pre-bonded aluminum-copper composite and the sheet of stainless steel are heated in separate furnaces and then stacked one on the other.

Claim 22

Dependent Claim 18 words

A method as claimed in claim 14 wherein the sheets are joined by passing through a rolling mill.

Claim 23

Dependent Claim 21 words

A method as claimed in claim 15 wherein the sheets are post heat-treated to about 700° F. following the last reduction.

Claim 24

Independent Claim 116 words

The method of making a composite clad metal product comprising the steps of first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to to a temperature between 300° F. to 800° F. then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, postheat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel with the stainless steel in contact with the cleaned aluminum surface, subjecting the stacked metals to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 25

Independent Claim 116 words

The method of making a composite clad metal product comprising the steps of first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to to a temperature between 300° F. to 800° F. then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, postheat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel with the stainless steel in contact with the cleaned aluminum surface, subjecting the stacked metals to a first reduction of about 2% followed by a reduction of about 5 to 25%.

Claim 26

Independent Claim 87 words

The method of making a composite clad metal product wherein a copper sheet, at least one aluminum sheet coated with substantially pure aluminum on the surfaces to be joined and at least one stainless steel sheet are first heated to to a temperature between 300° F. to 800° F., then assembled with the aluminum sheet between the copper and the stainless steel sheets, the assembled sheets are joined under pressure sufficient to produce a reduction of about 20 to 70% and the product is post heat treated.

Claim 27

Independent Claim 87 words

The method of making a composite clad metal product wherein a copper sheet, at least one aluminum sheet coated with substantially pure aluminum on the surfaces to be joined and at least one stainless steel sheet are first heated to to a temperature between 300° F. to 800° F., then assembled with the aluminum sheet between the copper and the stainless steel sheets, the assembled sheets are joined under pressure sufficient to produce a reduction of about 20 to 70% and the product is post heat treated.

Claim 28

Dependent Claim 65 words

The method as claimed in claim 19 or 20 wherein the sheets being joined consist of a copper sheet, a pair of aluminum alloy sheets coated with substantially pure aluminum on each surface, one of said pair of aluminum alloy sheets on each opposite surface of the copper sheet and a stainless steel sheet on at least one surface of the aluminum opposite the copper.

Claim 29

Dependent Claim 18 words

A method as claimed in claim 19 or 20 wherein the metal sheets are heated in separate furnaces.

Claim 30

Dependent Claim 20 words

A method as claimed in claim 19 or 20 wherein the sheets are joined by passing through a rolling mill.

Claim 31

Dependent Claim 22 words

A method as claimed in claim 22 wherein the sheets are post-heat treated up to about 700° F. following the last reduction.

Claim 32

Independent Claim 141 words

The method of making a clad metal product characterized by a high rate of thermal transmission and by resistance to corrosion comprising the steps of: a. mechanically cleaning the surfaces of each of a sheet from the group consisting of copper and copper alloys, and at least one aluminum alloy sheet coated with substantially pure aluminum; b. placing said mechanically cleaned sheets one on top of the other and applying at least one sheet of stainless steel on the aluminum; c. heating said sheets to a temperature of about 300° F. to 800° F.; d. joining said sheets under pressure sufficient to reduce the total thickness of said sheets an approximately 2% in the first reduction step and between 5 and 25% reduction in the second reduction step; e. stress relieving the joined sheets at a temperature of about 700° F.

Claim 33

Independent Claim 141 words

The method of making a clad metal product characterized by a high rate of thermal transmission and by resistance to corrosion comprising the steps of: a. mechanically cleaning the surfaces of each of a sheet from the group consisting of copper and copper alloys, and at least one aluminum alloy sheet coated with substantially pure aluminum; b. placing said mechanically cleaned sheets one on top of the other and applying at least one sheet of stainless steel on the aluminum; c. heating said sheets to a temperature of about 300° F. to 800° F.; d. joining said sheets under pressure sufficient to reduce the total thickness of said sheets an approximately 2% in the first reduction step and between 5 and 25% reduction in the second reduction step; e. stress relieving the joined sheets at a temperature of about 700° F.

Claim 34

Independent Claim 154 words

The method of making a clad metal product characterized by a high rate of thermal transmission and by resistance to corrosion comprising the steps of: (a). mechanically cleaning the surfaces of each of a sheet from the group consisting of copper and copper alloys, and at least one aluminum alloy sheet coated with substantially pure aluminum; (b). placing said mechanically cleaned sheets one on top of the other and applying sufficient pressure to join the sheets to form a pre-bonded composite; (c). applying at least one sheet of stainless steel on the aluminum; (d). heating said sheets to a temperature of about 300° F. to 800° F.; (e). joining said sheets under pressure sufficient to reduce the total thickness of said sheets approximately 2% in a first reduction step and between 5% and 25% reduction in a second reduction step; and (f). stress relieving the joined sheets at a temperature of about 700° F.

Claim 35

Independent Claim 154 words

The method of making a clad metal product characterized by a high rate of thermal transmission and by resistance to corrosion comprising the steps of: (a). mechanically cleaning the surfaces of each of a sheet from the group consisting of copper and copper alloys, and at least one aluminum alloy sheet coated with substantially pure aluminum; (b). placing said mechanically cleaned sheets one on top of the other and applying sufficient pressure to join the sheets to form a pre-bonded composite; (c). applying at least one sheet of stainless steel on the aluminum; (d). heating said sheets to a temperature of about 300° F. to 800° F.; (e). joining said sheets under pressure sufficient to reduce the total thickness of said sheets approximately 2% in a first reduction step and between 5% and 25% reduction in a second reduction step; and (f). stress relieving the joined sheets at a temperature of about 700° F.

Claim 36

Independent Claim 110 words

The method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating the same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded aluminum-copper composite on at least one sheet of stainless steel with the aluminum adjacent to the stainless steel, heating the stacked metals to a temperature between 300° F. to 800° F. and subjecting the stacked heated metals to sufficient pressure to produce a reduction of about 20% to 70%.

Claim 37

Independent Claim 110 words

The method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating the same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded aluminum-copper composite on at least one sheet of stainless steel with the aluminum adjacent to the stainless steel, heating the stacked metals to a temperature between 300° F. to 800° F. and subjecting the stacked heated metals to sufficient pressure to produce a reduction of about 20% to 70%.

Claim 38

Independent Claim 87 words

The method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating same, cooling, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel, subjecting the stacked metals to a pressure sufficient to produce a reduction of about 20% to 70%.

Claim 39

Independent Claim 87 words

The method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under pressure sufficient to provide a reduction up to 80%, post-heat treating same, cooling, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel, subjecting the stacked metals to a pressure sufficient to produce a reduction of about 20% to 70%.

Claim 40

Independent Claim 111 words

The method of making a composite clad metal product comprising first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to a temperature between 300° F. to 800° F., then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, post-heat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel, heating the stacked metals to a temperature between 300° F. to 800° F., and subjecting the stacked metals to sufficient pressure to produce a reduction of about 20% to 70%.

Claim 41

Independent Claim 111 words

The method of making a composite clad metal product comprising first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to a temperature between 300° F. to 800° F., then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, post-heat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned pre-bonded composite on at least one sheet of stainless steel, heating the stacked metals to a temperature between 300° F. to 800° F., and subjecting the stacked metals to sufficient pressure to produce a reduction of about 20% to 70%.

Claim 42

Independent Claim 102 words

The method of making a composite clad metal product comprising the steps of first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to to a temperature between 300° F. to 800° F. then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, post-heat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned prebonded composite on at least one sheet of stainless steel, subjecting the stacked metals to a pressure sufficient to produce a reduction of about 20% to 70%.

Claim 43

Independent Claim 102 words

The method of making a composite clad metal product comprising the steps of first heating a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined to to a temperature between 300° F. to 800° F. then joining said heated sheets together under pressure sufficient to provide a reduction of 20 to 70%, post-heat treating same, mechanically cleaning the aluminum surface, placing said mechanically cleaned prebonded composite on at least one sheet of stainless steel, subjecting the stacked metals to a pressure sufficient to produce a reduction of about 20% to 70%.

Claim 44

Dependent Claim 20 words

The method as claimed in claim 25 or 26 wherein the sheets are joined by passing through a rolling mill.

Claim 45

Dependent Claim 29 words

A method as claimed in claim 26 wherein the pre-bonded aluminum-copper composite and the stainless steel sheet are heated in separate furnaces and then stacked one on the other.

Claim 46

Dependent Claim 68 words

A method as claimed in claim 26, or 27, or 28, or 29 wherein the sheets being joined consist of a copper sheet, a pair of aluminum alloy sheets coated with substantially pure aluminum on each surface, one of said pair of aluminum alloy sheets on each opposite surface of the copper sheet and a stainless steel sheet on at least one surface of the preformed copper/aluminum core.

Claim 47

Dependent Claim 24 words

A method as claimed in claim 27, or 28, or 29, or 30 wherein the sheets are joined by passing through a rolling mill.

Claim 48

Dependent Claim 28 words

A method as claimed in claim 27, or 28, or 29, or 30 wherein the sheets are post-heat treated up to about 700° F. following the last reduction.

Claim 49

Dependent Claim 30 words

A method as claimed in claim 25, or 27, or 28, or 29, or 30 wherein the sheets are heated in separate furnaces and then stacked one on the other.

Claim 50

Independent Claim 117 words

A method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under a pressure sufficient to provide a reduction of about 80%, post-heat treating the bonded aluminum copper composite, heating the pre-bonded aluminum copper composite to a temperature in the range 300° F. to 800° F., placing said heated aluminum-copper composite on at least one sheet of stainless steel with the aluminum abutting the stainless steel and subjecting the stacked metals to sufficient pressure to produce a first reduction of about 2% followed by a reduction of about 5% to 25%.

Claim 51

Independent Claim 117 words

A method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under a pressure sufficient to provide a reduction of about 80%, post-heat treating the bonded aluminum copper composite, heating the pre-bonded aluminum copper composite to a temperature in the range 300° F. to 800° F., placing said heated aluminum-copper composite on at least one sheet of stainless steel with the aluminum abutting the stainless steel and subjecting the stacked metals to sufficient pressure to produce a first reduction of about 2% followed by a reduction of about 5% to 25%.

Claim 52

Independent Claim 107 words

A method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under a pressure sufficient to provide a reduction of about 80%, post-heat treating the bonded aluminum copper composite, heating the pre-bonded aluminum-copper composite to a temperature in the range 300° F. to 800° F., placing the heated composite on at least one sheet of stainless steel with the aluminum abutting the stainless steel and subjecting the stacked metals to sufficient pressure to produce a reduction of about 20% to 70%.

Claim 53

Independent Claim 107 words

A method of making a composite clad metal product comprising the steps of first joining together a copper sheet and at least one aluminum alloy sheet coated with substantially pure aluminum on the surfaces to be joined under a pressure sufficient to provide a reduction of about 80%, post-heat treating the bonded aluminum copper composite, heating the pre-bonded aluminum-copper composite to a temperature in the range 300° F. to 800° F., placing the heated composite on at least one sheet of stainless steel with the aluminum abutting the stainless steel and subjecting the stacked metals to sufficient pressure to produce a reduction of about 20% to 70%.

Claim 54

Dependent Claim 64 words

A method as claimed in claim 37 or 38 wherein the sheets being joined consist of a copper sheet, a pair of aluminum alloy sheets coated with substantially pure aluminum on each surface, one of said pair of aluminum alloy sheets on each opposite surface of the copper sheet and a stainless steel sheet on at least one surface of the preformed copper/aluminum core.

Claim 55

Dependent Claim 20 words

A method as claimed in claim 37 or 38 wherein the sheets are joined by passing through a rolling mill.

Claim 56

Dependent Claim 24 words

A method as claimed in claim 37 or 38 wherein the sheets are post-heat treated up to about 700° F. following the last reduction.

Claim 57

Dependent Claim 24 words

A method as claimed in claim 37 or 38 wherein the sheets are heated in separate furnaces and then stacked one on the other.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-01-20	1984-07-21	1985-01-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-01-20	1988-07-21	1989-01-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-01-20	1992-07-21	1993-01-20	$7700.00	Window Closed / Lapsed

Multiple member clad metal products and methods of making the same

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