US3865665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing multi-layer flat film
Assignee: Individual
•
Filing: 1973-12-10
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Granted: 1975-02-11
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Expires: 1993-12-10
Abstract
Abstract A method of producing a multi-layer flat film which is selfsupporting and/or adhering to a substrate by co-extruding at least two thermo-extrudable materials in the form of flat streams or non-solidified sheets in spaced parallel relatively closely adjacent overlapping positions so that their respective side edges are offset or staggered from each other, bonding adjacent face surfaces of such nonsolidified sheets with one another and/or to a substrate and cooling the bonded sheets to form the desired multi-layer composite film. In a preferred embodiment, a wide temperature differential between the co-extruded streams is attained and ranges from about 0* to 200*F. for improved bonding characteristics.
Inventors
- 👤 George J Marion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:59
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/313; B29C48/001; B29C48/0013; B29C48/0014; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/21
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A method of producing a multi-layer flat film comprising; co-extruding at least two thermo-extrudable materials in the form of flat non-solidified sheets in spaced-apart relatively closely adjacent overlapping position to each other, each of said sheets having its respective side edges offset from adjacent sheet side edges; bonding adjacent face surfaces of such non-solidified sheets with one another; and cooling the bonded sheets to form a solidified multi-layer composite film.
Claim 2
Independent Claim
70 words
A method of producing a multi-layer flat film comprising; co-extruding at least two thermo-extrudable materials in the form of flat non-solidified sheets in spaced-apart relatively closely adjacent overlapping position to each other, each of said sheets having its respective side edges offset from adjacent sheet side edges; bonding adjacent face surfaces of such non-solidified sheets with one another; and cooling the bonded sheets to form a solidified multi-layer composite film.
Claim 3
Independent Claim
112 words
A METHOD OF COATING A MULTI-LAYER FLAT FILM ONTO A SUBSTRATE COMPRISING, CO-EXTRUDING AT LEAST TWO THERMO-EXTRUDABLE MATERIALS IN THE FORM OF FLAT NON-SOLIDIFIED SHEETS IN SPACED-PART RELATIVELY CLOSELY ADJACENT OVERLAPPING POSITION TO EACH OTHER, EACH OF SAID SHEETS HAVING ITS REPECTIVE SIDE EDGES OFFSET FROM ADJACENT SHEET SIDE EDGES, FEEDING A SUBSTRATE FOR CONTINGUOUS CONTACT WITH ONE OF SAID NONSOLIDIFIED SHEETS, SUBSTANTIALLY SIMULTANEOUSLY BONDING ADJACENT FACE SURFACES OF SUCH NON-SOLIDIFIED SHEETS WITH ONE ANOTHER AND BONDING ONE OF THE OTHER FACE SURFACES OF ONE OF SAID SHEETS WITH AN ADJACENT FACE SURFACE OF SAID SUBSTRATE, AND COOLING THE BONDED SHEETS TO FORM A SOLIDIFIED MULTI-LAYER FLAT FILM COATING ON THE SUBSTRATE.
Claim 4
Independent Claim
112 words
A METHOD OF COATING A MULTI-LAYER FLAT FILM ONTO A SUBSTRATE COMPRISING, CO-EXTRUDING AT LEAST TWO THERMO-EXTRUDABLE MATERIALS IN THE FORM OF FLAT NON-SOLIDIFIED SHEETS IN SPACED-PART RELATIVELY CLOSELY ADJACENT OVERLAPPING POSITION TO EACH OTHER, EACH OF SAID SHEETS HAVING ITS REPECTIVE SIDE EDGES OFFSET FROM ADJACENT SHEET SIDE EDGES, FEEDING A SUBSTRATE FOR CONTINGUOUS CONTACT WITH ONE OF SAID NONSOLIDIFIED SHEETS, SUBSTANTIALLY SIMULTANEOUSLY BONDING ADJACENT FACE SURFACES OF SUCH NON-SOLIDIFIED SHEETS WITH ONE ANOTHER AND BONDING ONE OF THE OTHER FACE SURFACES OF ONE OF SAID SHEETS WITH AN ADJACENT FACE SURFACE OF SAID SUBSTRATE, AND COOLING THE BONDED SHEETS TO FORM A SOLIDIFIED MULTI-LAYER FLAT FILM COATING ON THE SUBSTRATE.
Claim 5
Dependent Claim
27 words
A method of producing a multi-layer flat film as defined in claim 1 wherein each of the co-extruded non solidified sheets is at an independent given temperature.
Claim 6
Dependent Claim
32 words
A method of producing a multilayer flat film as defined in claim 3 wherein a temperature differential between the temperatures of each non-solidified sheet ranges from about 0* to about 200* F.
Claim 7
Dependent Claim
36 words
A method of producing a multi-layer flat film as defined in claim 1 wherein one side of the bonded nonsolidified sheet is cooled prior to the cooling of the other side of such bonded non-solidified sheets.
Claim 8
Dependent Claim
27 words
A method of producing a multi-layer flat film as defined in claim 1 wherein the opposite non-bonded face surfaces of said non-solidified sheets are cooled substantially simultaneously.
Claim 9
Dependent Claim
35 words
A method of coating a multi-layer flat film onto a substrate as defined in claim 2 wherein at least a face of the substrate is heated prior to contact with one of said non-solidified sheets.
Claim 10
Dependent Claim
41 words
A method of coating a multi-layer flat film onto a substrate as defined in claim 2 wherein at least one of the surfaces of the substrate is subjected to a corona discharge prior to contact with one of said non-solidified sheets.
Claim 11
Dependent Claim
27 words
A method of coating a multi-layer flat film onto a substrate as defined in claim 2 wherein each of said non-solidified sheets is at an independent temperature.
Claim 12
Dependent Claim
36 words
A method of coating a multi-layer flat film onto a substrate as defined in claim 9 wherein a temperature differential between the temperature of each of said non-solidified sheets ranges from about 0* to 200* F.
Claim 13
Independent Claim
88 words
A method of producing a multi-layer flat film comprising: producing at least two separate melts of a given thermo-extrudable material, each of said melts being at a given independent temperature; co-extruding said melts in the form of flat non-solidifed sheets in spaced-apart relatively closely adjacent overlapping position to each other, each of said sheets having its respective side edges offset from adjacent sheet side edges; bonding adjacent face surfaces of such non-solidifed sheets with one another; and cooling the bonded sheets to form a solidified multi-layer composite film.
Claim 14
Independent Claim
88 words
A method of producing a multi-layer flat film comprising: producing at least two separate melts of a given thermo-extrudable material, each of said melts being at a given independent temperature; co-extruding said melts in the form of flat non-solidifed sheets in spaced-apart relatively closely adjacent overlapping position to each other, each of said sheets having its respective side edges offset from adjacent sheet side edges; bonding adjacent face surfaces of such non-solidifed sheets with one another; and cooling the bonded sheets to form a solidified multi-layer composite film.
Claim 15
Independent Claim
135 words
A method of producing a multi-layer flat film comprising; producing at least two separate melts from independently selected thermo-extrudable materials, each of said melts being at a given independent temperature with a temperature differential between the temperature of each of said melts ranging from about 0* to 200* F.; co-extruding said melts in the form of flat non-solidified sheets in spaced-apart relatively closely adjacent overlapping position to each other, each of said sheets having its respective side edges offset from adjacent sheet side edges; bonding adjacent face surfaces of such non-solidified sheets with one another; cooling the bonded sheets to form a solidified multi-layer composite film; and winding the so-formed and untrimmed multi-layer composite film onto a supply roll thereof, which is characterized by being substantially flat and without wrinkles across the entire width thereof.
Claim 16
Independent Claim
135 words
A method of producing a multi-layer flat film comprising; producing at least two separate melts from independently selected thermo-extrudable materials, each of said melts being at a given independent temperature with a temperature differential between the temperature of each of said melts ranging from about 0* to 200* F.; co-extruding said melts in the form of flat non-solidified sheets in spaced-apart relatively closely adjacent overlapping position to each other, each of said sheets having its respective side edges offset from adjacent sheet side edges; bonding adjacent face surfaces of such non-solidified sheets with one another; cooling the bonded sheets to form a solidified multi-layer composite film; and winding the so-formed and untrimmed multi-layer composite film onto a supply roll thereof, which is characterized by being substantially flat and without wrinkles across the entire width thereof.
References Cited (Backward Citations)
US2096362A
Cited
US3339234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |