Patent US3767500A successfully refreshed from Google Patents.
US3767500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of laminating long strips of various materials
Assignee: Chomerics Inc
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Filing: 1971-12-28
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Granted: 1973-10-23
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Expires: 1991-12-28
Abstract
Abstract Laminates of plastic films to metals or to plastic films or of metals to metals joined together by thermal-activated bonding materials are made by winding long strips of the laminate materials in face-to-face and interleaved relation onto a core to form a roll, confining the outside of the roll to prevent it from unwinding and heating the roll to a temperature sufficient to activate the bonding material. The heating of the roll results in a differential thermal expansion of the core, the laminate materials and the roll-confining member that generates a bonding pressure. Various interleaf layers wound between layers of the laminate materials can be used to provide desired laminating pressures during the heating step.
Inventors
- 👤 S Tally
- 👤 V Dahlgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:52
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/26; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/043; B32B15/08; B32B37/12; B32B37/1207; B32B7/00; B32B7/04; B32B7/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A method according to claim 1 and further comprising the step of wrapping in tiGht and interleaved relation between successive layers of the laminate materials of the roll a pressure-distributing interleaf strip of a material of sufficient strength that it tends to isolate each layer of the laminate materials on the roll and control the distribution of the pressure generated between the laminate materials throughout the cross section of the roll.
Claim 2
Dependent Claim
60 words
A method according to claim 1 and further comprising the step of wrapping in tight and interleaved relation between successive layers of the laminate materials of the roll a pressure-generating interleaf strip of a material having a coefficient of thermal expansion sufficiently high to generate by thermal expansion upon heating of the roll a substantial pressure between the laminate materials.
Claim 3
Dependent Claim
120 words
A method according to claim 1 and further comprising the steps of wrapping in tight and interleaved relation between successive layers of the laminate materials of the roll a pressure-distributing interleaf strip of a material of sufficient strength that it tends to isolate each layer of the laminate materials on the roll and control the distribution of the pressure generated between the laminate materials throughout the cross section of the roll and wrapping in tight and interleaved relation between successive layers of the laminate materials of the roll a pressure-generating interleaf strip of a material having a coefficient of thermal expansion sufficiently high to generate by thermal expansion upon heating of the roll a substantial pressure between the laminate materials.
Claim 4
Dependent Claim
85 words
A method according to claim 1 and further comprising the step of wrapping in tight and interleaved relation between the successive layers of the laminate materials of the roll a cushion interleaf strip of a pressure-absorbing material having a compressibility under the temperature attained in the heating step of the method such that the said pressure between the laminate materials generated upon heating of the roll is substantially less than it would be during the heating step in the absence of the cushion interleaf strip.
Claim 5
Dependent Claim
144 words
A method according to claim 1 and further comprising the steps of wrapping in tight and interleaved relation between the successive layers of the laminate materials of the roll a cushion interleaf strip of a pressure-absorbing material having a compressibility under the temperature attained in the heating step of the method such that the said pressure between the laminate materials generated upon heating of the roll is substantially less than it would be during the heating step in the absence of the cushion strip and wrapping in tight and interleaved relation between successive layers of the laminate materials of the roll a pressure-distributing interleaf strip of a material of sufficient strength that it tends to isolate each layer of the laminate materials on the roll and control the distribution of the pressure generated between the laminate materials throughout the cross section of the roll.
Claim 6
Dependent Claim
32 words
A method according to claim 1 wherein the confining member is formed by multiple layers of a strip of material wrapped around the outer layer of the laminate materials of the roll.
Claim 7
Dependent Claim
33 words
A method according to claim 2 wherein the confining member is formed by making multiple wraps of the said pressure-distributing interleaf strip around the outer layer of the laminate materials of the roll.
Claim 8
Dependent Claim
60 words
A method according to claim 1 wherein the material selected for the core has a coefficient of thermal expansion substantially greater than the coefficient of thermal expansion of the material selected for the confining member so that said pressure is generated by an outward thermal expansion of the core that is greater than the thermal expansion of the confining member.
Claim 9
Dependent Claim
29 words
A method according to claim 1 wherein the roll is heated slowly from ambient temperature to provide a substantially uniform rate of temperature rise throughout the roll cross section.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |