Patent US4238587A successfully refreshed from Google Patents.
Patent US257668A successfully refreshed from Google Patents.
Patent US4511520A successfully refreshed from Google Patents.
US4511520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making perforated films
Assignee: Pechiney Plastic Packaging Inc
•
Filing: 1982-07-28
•
Granted: 1985-04-16
•
Expires: 2002-07-28
Abstract
Abstract A perforated plastic film is produced by forming a pattern of light absorbing material (e.g., in dot and/or circular forms) on the film and subjecting the printed film to radiant energy from a light source in order to melt the film areas covered with the light absorbing material, thus producing a corresponding plurality of perforations in the plastic film.
Inventors
- 👤 William E. Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:31
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/26; B26F1/31; B26F3/00; B29; B29C; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0822; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T428/00; Y10T428/24; Y10T428/24273
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
86 words
A method of producing a perforated plastic film for passage of fluid therethrough which comprising forming a pattern of light-absorbing material on spaced finite areas on one surface of said plastic film, subjecting said plastic film to a light source and causing light generated from said light source to be absorbed by said light-absorbing material thereby melting the plastic film at the areas covered by said light-absorbing material without melting the remaining areas in said plastic film and producing perforations through said film at said areas.
Claim 2
Independent Claim
86 words
A method of producing a perforated plastic film for passage of fluid therethrough which comprising forming a pattern of light-absorbing material on spaced finite areas on one surface of said plastic film, subjecting said plastic film to a light source and causing light generated from said light source to be absorbed by said light-absorbing material thereby melting the plastic film at the areas covered by said light-absorbing material without melting the remaining areas in said plastic film and producing perforations through said film at said areas.
Claim 3
Dependent Claim
14 words
A method as in claim 1 wherein said plastic film is an oriented film.
Claim 4
Dependent Claim
16 words
A method as in claim 1 wherein said light absorbing material is a thermally conductive ink.
Claim 5
Dependent Claim
16 words
A method as in claim 2 wherein said light absorbing material is a thermally conductive ink.
Claim 6
Dependent Claim
27 words
A method as in claim 1 wherein the configuration of said areas of light absorbing material is in a generally circular form or in solid dot form.
Claim 7
Dependent Claim
27 words
A method as in claim 2 wherein the configuration of said areas of light absorbing material is in a generally circular form or in solid dot form.
Claim 8
Dependent Claim
27 words
A method as in claim 3 wherein the configuration of said areas of light absorbing material is in a generally circular form or in solid dot form.
Claim 9
Dependent Claim
27 words
A method as in claim 4 wherein the configuration of said areas of light absorbing material is in a generally circular form or in solid dot form
Claim 10
Dependent Claim
56 words
A method as in claim 1 wherein the pattern of light absorbing material is formed on spaced finite areas on opposing surfaces of said film such that the pattern of light absorbing material on one surface of said film is in register with the pattern of light absorbing material on the opposing surface of said film.
Claim 11
Dependent Claim
14 words
A method as in claim 9 wherein said plastic film is an oriented film.
Claim 12
Dependent Claim
16 words
A method as in claim 9 wherein said light absorbing material is a thermally conductive ink.
Claim 13
Dependent Claim
16 words
A method as in claim 10 wherein said light absorbing material is a thermally conductive ink.
Claim 14
Dependent Claim
21 words
A method as in claim 1 including the additional step of laminating said perforated plastic film to a second plastic film.
Claim 15
Dependent Claim
15 words
A method as in claim 13 wherein said perforated plastic film is an oriented film.
Claim 16
Dependent Claim
16 words
A method as in claim 13 wherein said light absorbing material is a thermally conductive ink.
Claim 17
Dependent Claim
16 words
A method as in claim 14 wherein said light absorbing material is a thermally conductive ink.
Claim 18
Independent Claim
85 words
A method of producing a perforated plastic film for passage of fluid therethrough which comprises forming a pattern of light-absorbing material on spaced finite areas on a surface of a first plastic film, laminating a second plastic film onto said surface and subjecting the resulting laminate to a light source to be absorbed by said light-absorbing material thereby melting the plastic film covered by said light-absorbing material without melting the remaining areas in the plastic film to produce perforations through said laminate at said areas.
Claim 19
Independent Claim
85 words
A method of producing a perforated plastic film for passage of fluid therethrough which comprises forming a pattern of light-absorbing material on spaced finite areas on a surface of a first plastic film, laminating a second plastic film onto said surface and subjecting the resulting laminate to a light source to be absorbed by said light-absorbing material thereby melting the plastic film covered by said light-absorbing material without melting the remaining areas in the plastic film to produce perforations through said laminate at said areas.
References Cited (Backward Citations)
US2699113A
Cited
US2715363A
Cited
US2763759A
Cited
US3587459A
Cited
NL7001320A
Cited
DE2115548A1
Cited
US4117181A
Cited
DE2427862A1
Cited
JPS5053450A
Cited
DE2406955A1
Cited
US3999918A
Cited
JPS538679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |