US4345954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making laminates
Assignee: Polaroid Corp
•
Filing: 1979-03-23
•
Granted: 1982-08-24
•
Expires: 1999-03-23
Abstract
Abstract A process for making laminates of cellophane, conductive plastic, and metal powder, comprising laminating the sheet of cellophane to a sheet of conductive plastic with an intermediate composition comprising an aqueous dispersion of metal electrode particles and a binder, and drying the laminate to remove water from the dispersion.
Inventors
- 👤 Paul Panchu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:23
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/12; H01M6/00; H01M6/04; H01M6/06; H01M6/12
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
86 words
The method of making a triplex laminate of cellophane, electrode particles and conductive plastic, comprising the steps of laminating under pressure a sheet of conductive plastic, a sheet of cellophane, and an intermediate layer of an aqueous dispersion of electrode particles and a binder in which said aqueous dispersion comes into contact with the conductive plastic sheet at least as soon as it comes in contact with the cellophane sheet, and drying said laminate to remove moisture from said dispersion by diffusion through said cellophane sheet.
Claim 2
Independent Claim
86 words
The method of making a triplex laminate of cellophane, electrode particles and conductive plastic, comprising the steps of laminating under pressure a sheet of conductive plastic, a sheet of cellophane, and an intermediate layer of an aqueous dispersion of electrode particles and a binder in which said aqueous dispersion comes into contact with the conductive plastic sheet at least as soon as it comes in contact with the cellophane sheet, and drying said laminate to remove moisture from said dispersion by diffusion through said cellophane sheet.
Claim 3
Dependent Claim
12 words
The method of claim 1, in which said electrode particles comprise zinc.
Claim 4
Dependent Claim
23 words
The method of claim 1, in which said electrode particles comprise a major proportion of zinc and a minor proportion of carbon black.
Claim 5
Dependent Claim
22 words
The method of claim 1, in which said intermediate layer is formed by coating said conductive plastic sheet with said aqueous dispersion.
Claim 6
Dependent Claim
32 words
The method of claim 1, in which said intermediate layer is formed from a supply of said aqueous dispersion introduced between said sheets and reduced to a predetermined thickness during said lamination.
Claim 7
Dependent Claim
105 words
The method of claim 5, in which a pair of release sheets wider than said conductive plastic sheet and said cellophane sheet are laminated with said conductive plastic sheet, said cellophane sheet, and said intermediate layer with one of said release sheets adjacent said cellophane sheet and the other of said release sheets adjacent said conductive plastic sheet to contain any portion of said aqueous composition exuded beyond the borders of said cellophane and conductive plastic sheets, and further comprising the steps of removing said release sheet adjacent said cellophane sheet from the laminate of cellophane, electrode particles and conductive plastic before drying said laminate.
Claim 8
Dependent Claim
29 words
The method of claim 1, in which said lamination is performed by passing said sheets and said intermediate layer through a fixed gap between a pair of nip rolls.
Claim 9
Dependent Claim
41 words
The method of claim 7, in which said intermediate layer is formed by coating said conductive plastic sheet with said aqueous dispersion, and said coated conductive plastic sheet is fed into the gap between said nip rolls with said cellophane sheet.
Claim 10
Dependent Claim
43 words
The method of claim 7, in which said intermediate layer is formed by feeding said cellophane sheet and said conductive plastic sheet into the gap between said nip rolls while supplying said aqueous composition between said sheets into the nip between said rolls.
Claim 11
Dependent Claim
104 words
The method of claim 9, further comprising the steps of feeding a pair of release sheets wider than said conductive plastic and cellophane sheets into the gap between said rolls simultaneously with said conductive plastic and cellophane sheets with one of said release sheets adjacent said cellophane sheet and the other of said release sheets adjacent said conductive plastic sheet to contain any portion of said aqueous composition exuded beyond the borders of said cellophane and conductive plastic sheets, and removing at least said release sheet adjacent said cellophane sheet from the laminate of cellophane, electrode particles and conductive plastic before drying the laminate.
Claim 12
Dependent Claim
23 words
The method of claim 1 in which said electrode particles comprise a major proportion of zinc and a minor proportion of carbon black.
Claim 13
Independent Claim
114 words
The method of forming a triplex laminate of zinc and carbon particles, cellophane and conductive plastic, comprising the steps of coating the conductive plastic side of a laminate of conductive plastic and a release sheet with an aqueous dispersion of zinc and carbon particles and a binder, laminating the coated laminate to a sheet of cellophane under pressure by passing the coated laminate and a sheet of cellophane between a pair of nip rolls spaced by a predetermined gap with the coated side of said coated laminate in contact with said cellophane sheet, removing said release sheet, and drying the laminate of cellophane, aqueous zinc dispersion and conductive plastic so formed in heated air.
Claim 14
Independent Claim
114 words
The method of forming a triplex laminate of zinc and carbon particles, cellophane and conductive plastic, comprising the steps of coating the conductive plastic side of a laminate of conductive plastic and a release sheet with an aqueous dispersion of zinc and carbon particles and a binder, laminating the coated laminate to a sheet of cellophane under pressure by passing the coated laminate and a sheet of cellophane between a pair of nip rolls spaced by a predetermined gap with the coated side of said coated laminate in contact with said cellophane sheet, removing said release sheet, and drying the laminate of cellophane, aqueous zinc dispersion and conductive plastic so formed in heated air.
Claim 15
Independent Claim
155 words
The method of forming a triplex laminate of zinc and carbon particles, cellophane and conductive plastic, comprising the steps of feeding four sheets into a predetermined gap between a pair of nip rolls, said sheets comprising first and second inner sheets of a first width and third and fourth outer sheets of a second width wider than said first width, said first sheet being a sheet of cellophane in contact with said third sheet, and said second sheet being a sheet of conductive plastic in contact with said fourth sheet, supplying an aqueous dispersion of zinc and carbon particles with a binder between said first and second sheets in the nip between said rolls to produce an intermediate layer of said aqueous dispersion between said first and second sheets with a thickness determined by said gap, removing said third sheet, and drying said first, second and fourth sheets and said intermediate layer in heated air.
Claim 16
Independent Claim
155 words
The method of forming a triplex laminate of zinc and carbon particles, cellophane and conductive plastic, comprising the steps of feeding four sheets into a predetermined gap between a pair of nip rolls, said sheets comprising first and second inner sheets of a first width and third and fourth outer sheets of a second width wider than said first width, said first sheet being a sheet of cellophane in contact with said third sheet, and said second sheet being a sheet of conductive plastic in contact with said fourth sheet, supplying an aqueous dispersion of zinc and carbon particles with a binder between said first and second sheets in the nip between said rolls to produce an intermediate layer of said aqueous dispersion between said first and second sheets with a thickness determined by said gap, removing said third sheet, and drying said first, second and fourth sheets and said intermediate layer in heated air.
Claim 17
Independent Claim
73 words
The method of making a triplex laminate of cellophane, electrode particles and conductive plastic, comprising the steps of coating a sheet of conductive plastic with an aqueous dispersion of electrode particles and a binder, laminating a sheet of cellophane to said coated plastic sheet under pressure with said aqueous dispersion coating in contact with said cellophane sheet, and drying said laminate to remove moisture from said dispersion by diffusion through said cellophane sheet.
Claim 18
Independent Claim
73 words
The method of making a triplex laminate of cellophane, electrode particles and conductive plastic, comprising the steps of coating a sheet of conductive plastic with an aqueous dispersion of electrode particles and a binder, laminating a sheet of cellophane to said coated plastic sheet under pressure with said aqueous dispersion coating in contact with said cellophane sheet, and drying said laminate to remove moisture from said dispersion by diffusion through said cellophane sheet.
Claim 19
Dependent Claim
12 words
The method of claim 14, in which said electrode particles comprise zinc.
Claim 20
Dependent Claim
23 words
The method of claim 14, in which said electrode particles comprise a major proportion of zinc and a minor proportion of carbon black.
Claim 21
Dependent Claim
32 words
The method of claim 14, in which said lamination is performed by passing said coated conductive plastic sheet and said cellophane sheet through a fixed gap between a pair of nip rolls.
Claim 22
Independent Claim
87 words
The method of making a triplex laminate of cellophane, electrode particles and conductive plastic, comprising the steps of laminating under pressure a sheet of conductive plastic, a sheet of cellophane, and an intermediate layer of an aqueous dispersion of electrode particles and a binder, in which said intermediate layer is formed from a supply of said aqueous dispersion introduced between said sheets and reduced to a predetermined thickness during said lamination, and drying said laminate to remove moisture from said dispersion by diffusion through said cellophane sheet.
Claim 23
Independent Claim
87 words
The method of making a triplex laminate of cellophane, electrode particles and conductive plastic, comprising the steps of laminating under pressure a sheet of conductive plastic, a sheet of cellophane, and an intermediate layer of an aqueous dispersion of electrode particles and a binder, in which said intermediate layer is formed from a supply of said aqueous dispersion introduced between said sheets and reduced to a predetermined thickness during said lamination, and drying said laminate to remove moisture from said dispersion by diffusion through said cellophane sheet.
Claim 24
Dependent Claim
12 words
The method of claim 18 in which said electrode particles comprise zinc.
Claim 25
Dependent Claim
107 words
The method of claim 16, in which a pair of release sheets wider than said conductive plastic sheet and said cellophane sheet are laminated with said conductive plastic sheet, said cellophane sheet, and said intermediate layer with one of said release sheets adjacent said cellophane sheet and the other of said release sheets adjacent said conductive plastic sheet to contain any portion of said aqueous composition exuded beyond the borders of said cellophane and conductive plastic sheets, and further comprising the step of removing at least said release sheet adjacent said cellophane sheet from the laminate of cellophane, electrode particles and conductive plastic before drying said laminate.
References Cited (Backward Citations)
US2058703A
Cited
US3112235A
Cited
US3256121A
Cited
US4003777A
Cited
US3708349A
Cited
US4124742A
Cited
US4125685A
Cited
US4161815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |