US2628929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for transferring a magnetic sound track to movie film
Assignee: 3M Co
•
Filing: 1949-07-15
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Granted: 1953-02-17
•
Expires: 1969-07-15
Abstract
No abstract record available.
Inventors
- 👤 Andrew H Persoon
- 👤 Chester F Stebbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:54
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/633; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1705; Y10T156/1712; Y10T156/1739; Y10T428/00; Y10T428/24; Y10T428/24752
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
177 words
A METHOD OF COATING MAGNETIC PARTICLES ON MOTION PICTURE FILM, ADJACENT AN EDGE THEREOF FROM A TRANSFER RIBBON INCLUDING A TEMPORARY BACKING, A MAGNETIC COATING COMPRISING FERROMAGNETIC PARTICLES UNIFORMLY DISPERSED IN A BINDER AND AN ADHESIVE LAYER OVERLYING SAID MAGNETIC COATING, SAID ADHESIVE BEING ADAPTED TO ADHERE MORE TENACIOUSLY TO SAID MOTION PICTURE FILM AND TO SAID BINDER THAN SAID BINDER ADHERES TO SAID TEMPORARY BACKING, WHICH COMPRISES CONDUCTING THE TRANSFER RIBBON AND MOTION PICTURE FILM AT THE SAME RATE TRAVEL IN CONVERGING PATHS UNTIL THE ADHESIVE-COATED SURFACE OF THE TRANSFER RIBBON IS IN CONTACT WITH AN EDGE PORTION OF THE MOTION PICTURE FILM, PRESSING THE CONTACTING PORTIONS OF SAID MOTION PICTURE FILM AND TRANSFER RIBBON TOGETHER, MAINTAINING THE TRANSFER RIBBON AND MOTION PICTURE FILM IN CONTACT UNTIL THE ADHESIVE HAS SET SUFFICIENTLY TO HOLD THE MAGNETIC COATING UPON THE MOTION PICTURE FILM UPON REMOVAL OF THE TEMPORARY BACKING, AND THEN SEPARATING THE TEMPORARY BACKING FROM THE TRANSFER RIBBON AND MOTION PICTURE FILM TO CAUSE THE MAGNETIC COATING TO BE TRANSFERRED FROM THE FORMER TO THE LATER.
Claim 2
Independent Claim
177 words
A METHOD OF COATING MAGNETIC PARTICLES ON MOTION PICTURE FILM, ADJACENT AN EDGE THEREOF FROM A TRANSFER RIBBON INCLUDING A TEMPORARY BACKING, A MAGNETIC COATING COMPRISING FERROMAGNETIC PARTICLES UNIFORMLY DISPERSED IN A BINDER AND AN ADHESIVE LAYER OVERLYING SAID MAGNETIC COATING, SAID ADHESIVE BEING ADAPTED TO ADHERE MORE TENACIOUSLY TO SAID MOTION PICTURE FILM AND TO SAID BINDER THAN SAID BINDER ADHERES TO SAID TEMPORARY BACKING, WHICH COMPRISES CONDUCTING THE TRANSFER RIBBON AND MOTION PICTURE FILM AT THE SAME RATE TRAVEL IN CONVERGING PATHS UNTIL THE ADHESIVE-COATED SURFACE OF THE TRANSFER RIBBON IS IN CONTACT WITH AN EDGE PORTION OF THE MOTION PICTURE FILM, PRESSING THE CONTACTING PORTIONS OF SAID MOTION PICTURE FILM AND TRANSFER RIBBON TOGETHER, MAINTAINING THE TRANSFER RIBBON AND MOTION PICTURE FILM IN CONTACT UNTIL THE ADHESIVE HAS SET SUFFICIENTLY TO HOLD THE MAGNETIC COATING UPON THE MOTION PICTURE FILM UPON REMOVAL OF THE TEMPORARY BACKING, AND THEN SEPARATING THE TEMPORARY BACKING FROM THE TRANSFER RIBBON AND MOTION PICTURE FILM TO CAUSE THE MAGNETIC COATING TO BE TRANSFERRED FROM THE FORMER TO THE LATER.
Claim 3
Dependent Claim
140 words
APPARATUS FOR CONTINUOUSLY TRANSFERRING MAGNETIC PARTICLES FROM A CARRIER RIBBON TO THE EDGE PORTION OF MOTION PICTURE FILM, SAID CARRIER RIBBON INCLUDING A FLEXIBLE BACKING, A LAYER OF MAGNETIC PARTICLES AND A HEAT-ACTIVATED ADHESIVE OVERLYING SAID LAYER; WHICH COMPRISES SUPPLY REELS UPON WHICH SAID MOTION PICTURE FILM AND CARRIER RIBBON ARE MOUNTED, MEANS FOR GUIDING SAID FLIM AND RIBBON IN CONVERGING PATHS AND AT THE SAME SPEED, MEANS FOR HEATING THE ADHESIVE ON SAID CARRIER RIBBON, A PRESSER ROLL COOPERATING WITH SAID HEATING MEANS TO PRESS THE ADHESIVE-COATED SURFACE OF THE CARRIER RIBBON AGAINST AN EDGE PORTION OF SAID MOTION PICTURE FILM, GUIDE MEANS FOR CONDUCTING THE LAMINATION OF CARRIER RIBBON AND MOTION PICTURE FILM TOGETHER UNTIL THE HEATACTIVATED ADHESIVE HAS HARDENED UPON SAID MOTION PICTURE FILM, AND SLITTING MEANS FOR TRIMMING AWAY THE UNLAMINATED PORTION OF SAID CARRIER RIBBON.
Claim 4
Dependent Claim
140 words
APPARATUS FOR CONTINUOUSLY TRANSFERRING MAGNETIC PARTICLES FROM A CARRIER RIBBON TO THE EDGE PORTION OF MOTION PICTURE FILM, SAID CARRIER RIBBON INCLUDING A FLEXIBLE BACKING, A LAYER OF MAGNETIC PARTICLES AND A HEAT-ACTIVATED ADHESIVE OVERLYING SAID LAYER; WHICH COMPRISES SUPPLY REELS UPON WHICH SAID MOTION PICTURE FILM AND CARRIER RIBBON ARE MOUNTED, MEANS FOR GUIDING SAID FLIM AND RIBBON IN CONVERGING PATHS AND AT THE SAME SPEED, MEANS FOR HEATING THE ADHESIVE ON SAID CARRIER RIBBON, A PRESSER ROLL COOPERATING WITH SAID HEATING MEANS TO PRESS THE ADHESIVE-COATED SURFACE OF THE CARRIER RIBBON AGAINST AN EDGE PORTION OF SAID MOTION PICTURE FILM, GUIDE MEANS FOR CONDUCTING THE LAMINATION OF CARRIER RIBBON AND MOTION PICTURE FILM TOGETHER UNTIL THE HEATACTIVATED ADHESIVE HAS HARDENED UPON SAID MOTION PICTURE FILM, AND SLITTING MEANS FOR TRIMMING AWAY THE UNLAMINATED PORTION OF SAID CARRIER RIBBON.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |